The passage is describing the beauty of Acadie, a place that is home to the speaker. This passage is from Bliss Carman's "LOW TIDES" .
The sun is setting, and the speaker is captivated by the beauty of the landscape, which is enhanced by the unelusive glories of the tide. The speaker also reflects on a beloved face being gone for a long time and is moved by a grievous stream, which meanders through the fields of Acadie as if it is trying to figure out why the beloved face is gone. The speaker almost dreams that the beauty of the place will remain until the beloved face returns. The passage conveys a sense of longing and hope for the beloved to come back to Acadie.
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the critical angle of oil is 28.8 what is the refractive index
The light beam shown in the figure below makes an angle of ϕ=28.8∘ ϕ = 28.8 ∘ with the normal line NN' in the linseed oil. Determine the angles θ and θ′ . (The refractive index for linseed oil is 1.48.)
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part g a transmitter on the earth's surface radiates sinusoidal radio waves equally in all directions above the ground. an airplane flying directly over the radio station at an altitude of 11.5 km measures the wave from the station to have electric-field amplitude 0.360 v/m. find the magnetic-field amplitude measured by the airplane. express your answer with the appropriate units. templatessymbols undoredoresetkeyboard shortcutshelp bmax
After solving the equation the amplitude of magnetic field is 1.2× 10^-9 T.
What is amplitude of magnetic field?
Amplitude of magnetic field is a measure of the strength of the magnetic field. It is measured in units of Tesla (T) or gauss (G). The magnetic field is produced by electric currents, the movement of charged particles, or the spin of an atomic nucleus. The amplitude of the magnetic field depends on the source, the amount of current, and the distance from the source. The Earth's magnetic field has an amplitude of approximately 30-60 microtesla (0.3 - 0.6 mG). At the surface of the Earth, the magnetic field is strongest near the poles, where it can reach over 65 microtesla (0.65 mG). In space, magnetic fields can reach amplitudes of up to 40,000 microtesla (400 G).
The distance between airplane and transmitter, R = 11.5 km
Amplitude of electric field, E = 0.360 v/m.
Amplitude of magnetic field, B = E/c
= 0.36 /3 × 10^8
= 1.2× 10^-9 T
Hence the amplitude of magnetic field is 1.2× 10^-9 T.
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The magnetic-field amplitude measured by the airplane 1.2× 10^-9 T
What is magnetic field?
The magnetic field is the area where the force of magnetism acts on a magnetic material or a moving electric charge. In order to impose a force on other adjacent moving charges and magnetic dipoles, moving electric charges and magnetic dipoles form a magnetic field.
The maximum field strength of the electric and magnetic fields can be found in electromagnetic waves by measuring their amplitude. The amplitude of the wave determines its energy.
The distance , R = 11.5 km
Electric field amplitude, E = 0.360 v/m.
Magnetic field amplitude, B = E/c
= 0.36 /3 × 10^8
= 1.2× 10^-9 T
So the amplitude of magnetic field is 1.2× 10^-9 T
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Analyze physical activities from which derived cardiovascular activity and one strength training activity of moderate to vigorous intensity that can be performed by a person that works out 3 a week doing a of exercises the gym Explain why you chose these activities adults, and briefly describe the long-term of each activity
The physical activities from which derived cardiovascular activity and one strength training activity of moderate to vigorous intensity that can be performed by a person is by jogging, running etc.
What is Exercise?This is referred to as a type of physical activity which helps to keep am individual fit and improves the overall being snd examples include running, squatting etc.
Running was chosen as a form of activity which can be used as a form of cardiovascular activity and strength training activity of moderate to vigorous intensity.
A long-term of running is that it helps to strengthen the muscles and bones which are present in the individual and also improves the cardiovascular fitness which is therefore the reason why it was chosen as the correct choice.
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If a piece of elastic wire 2 meters long and 3 centimeters in diameter increases its length by 2.5 cm when a force of 0.25 is applied to its area.Find the force applied on the string and the Young's scale of the string?
Answer: If a spring is stretched, then a force with magnitude proportional to the increase in length from the equilibrium length is pulling each end towards the other.
Explanation:
The force applied to the elastic wire can be calculated using the formula for Hooke's Law, which states that the force applied to an elastic object is proportional to the extension of the object. The formula for Hooke's Law is:
F = kx
where F is the force applied, k is the spring constant, and x is the extension of the object.
In this case, the extension of the object is 2.5 cm, and the force applied is 0.25. We can use these values to solve for the spring constant:
k = F/x
= 0.25 / 2.5 cm
= 0.1 N/cm
The spring constant is 0.1 N/cm, which represents the stiffness of the elastic wire. The higher the spring constant, the more force is required to stretch the wire.
The Young's modulus of the elastic wire can also be calculated using the formula:
E = F/A
where E is Young's modulus, F is the force applied, and A is the cross-sectional area of the wire.
In this case, the cross-sectional area of the wire is 3 cm in diameter or 7.07 cm^2. We can use this value, along with the force and spring constant, to calculate Young's modulus:
E = F/A
= 0.25 / 7.07 cm^2
= 0.035 N/cm^2
Young's modulus of the elastic wire is 0.035 N/cm^2, which represents the stiffness of the wire under tension. A higher Young's modulus indicates that the wire is more resistant to being stretched.
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when a hurricane moves onto land, it rapidly declines because of friction and lack of warm, moist air. t/f
False, supposedly when a hurricane moves ashore, it quickly rises due to friction and a lack of warm, moist air.
Hurricanes are known as cyclones as well as typhoons in other tropical regions. Typhoons are one of the most disturbing types of natural disasters at the moment.
Scientifically, the cause of hurricanes from warm water, warm moist air, and light upper-level winds as the primary ingredients of their formation.
Typhoons have other terms, depending on where they occur. the scientific term for a hurricane is a tropical cyclone. Only tropical cyclones that form over the Atlantic Ocean or the eastern Pacific Ocean are called "hurricanes".
The cause of a hurricane occurs when a warm, moist air mass from the sea surface begins to rise rapidly and collides with a colder air mass. The friction pushes the warm water vapor to condense. During the condensation process, latent heat is emitted.
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What happens when a loop of wire turns between two permanent magnets in
a generator?
A. A current flows through the loop of wire.
B. Mechanical energy transforms into electromagnetic radiation.
C. Electrical energy transforms into mechanical energy.
D. A current flows through the permanent magnets.
Answer:
A. A current flows through the loop of wire.
Explanation:
When a loop of wire turns between two permanent magnets in a generator, a current flows through the loop of wire. This is because the movement of the wire through the magnetic field of the permanent magnets causes the electrons in the wire to move, which creates an electric current. This process is known as electromagnetic induction, and it is the principle behind the operation of generators.
PLEASE HELP ME ANSWER THE PHYSICS QUESTIONS ON MY PROFILE!!!
i will give brainliest to the first to answer!!! this one and the other ones
A 0.16 kg plastic ball moves with a velocity of 0.42 m/s. It collides with a second plastic ball of mass 0.017 kg, which is moving along the same line at a speed of 0.18 m/s. After the collision, both balls continue moving in the same, original direction. The speed of the 0.017 kg ball is 0.41 m/s. What is the new velocity of the 0.16 kg ball?
Answer:
0.3949 m/s
Explanation :)
In this scenario, we can use the conservation of momentum to determine the new velocity of the 0.16 kg ball after the collision. The conservation of momentum states that the total momentum of a system of objects remains constant if there are no external forces acting on the objects. In this case, the two balls are the only objects involved in the collision, so we can use the conservation of momentum to determine the new velocity of the 0.16 kg ball.
We can start by calculating the total initial momentum of the two balls before the collision. The momentum of an object is equal to its mass multiplied by its velocity, so the initial momentum of the 0.16 kg ball would be 0.16 kg * 0.42 m/s = 0.0672 kgm/s. The initial momentum of the 0.017 kg ball would be 0.017 kg * 0.18 m/s = 0.00306 kgm/s. The total initial momentum of the system would be the sum of the two balls' initial momenta, or 0.0672 kgm/s + 0.00306 kgm/s = 0.07026 kg*m/s.
After the collision, the two balls continue moving in the same direction, so their final momenta must also be in the same direction. Since the momentum of the system must remain constant, the final momentum of the 0.16 kg ball must be equal to the initial momentum of the system minus the final momentum of the 0.017 kg ball. We know that the final momentum of the 0.017 kg ball is 0.017 kg * 0.41 m/s = 0.00707 kgm/s, so the final momentum of the 0.16 kg ball must be 0.07026 kgm/s - 0.00707 kgm/s = 0.06319 kgm/s.
To find the new velocity of the 0.16 kg ball, we can divide its final momentum by its mass. This gives us 0.06319 kg*m/s / 0.16 kg = 0.3949 m/s. Therefore, the new velocity of the 0.16 kg ball after the collision is 0.3949 m/s.
(round to tenth) 1. How much power is required to do 40.3 J of work on an object in 5.5 seconds?
Answer:
7.3 W (watts)
Explanation:
Power = Work / time
P = W/t = 40.3J / 5.5 s = 7.3 W
One mole of oxygen gas is at a temperature of 30°C. If the gas is heated at constant volume until the pressure triples, what is the final temperature?
A. 60°C B. 50°C C. 363 K D. 423 K
The final temperature is 909 K or 636° C.
What is Gay-Lussac's law?According to Gay-Lussac's law, the pressure that a gas (with a given mass and maintained at a fixed volume) exerts varies directly with the gas's absolute temperature.
Initial temperature of the gas: T₁ = 30⁰ C = 273 + 30 K = 303 K.
Initial pressure of the gas = P₁ = P
Final pressure of the gas = P₂ = 3P
Final temperature of the gas: T₂ = ?
Now from Gay-Lussac's law;
T₁/P₁ = T₂/P₂
T₂ = T₁P₂/P₁
= 303 K × 3P/P
= 3 × 303 K
=909 K
Hence, the final temperature is = 909 K = 636° C.
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Consider the ballistic pendulum collision. The projectile, of mass m, is fired into a large block of mass M Derive a formula for the fraction of the magnitude of kinetic energy lost Express your answer in terms of the variables m and M Evaluate the fraction for m = 18.0 g and M = 380 g . Express your answer using three significant figures..
A massive block of known Mass is struck by the projectile, which has mass m. The amount of kinetic energy wasted as a percentage is 0.955.
Describe mass.A quantitative representation of inertia, the fundamental property of all matter. In essence, it describes the resistance of a body of theory to altering its movement or location in reaction to the applied load. More and more volume a body has, the less the change brought on by an external load is.
The mass formula is what?The average concentration (M), which is a physical property, is the same mass as one mole of a hazardous chemical or the ratio of the quantities of a psychoactive compound to its own amounts of pollutants.
Briefing:kinetic energy lost = change KE/KE
=1-m/(m + M)
=0.955.
momentum,
mv = (m + M)*V
V=m(1/( M + m))v
kinetic energy lost,
ΔKE / KE
= 1-m (1 / (m + M)
ΔKE/KE = 1-18(1/(18+380)
ΔKE/KE = 0.955
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A wire carrying a 30.0 -A current bends through a right angle. Consider two 2.00 -mm segments of wire, each 3.00 cm from the bend (the figure ).uploaded imageA) Find the magnitude of the magnetic field these two segments produce at point P, which is midway between them.
B) Find the direction of the magnetic field at point P.
A) The magnitude of the magnetic field these two segments produce at point P is 1.95 nT B) Direction of the magnetic field is into the page.
What is Biot - Savart's law?An equation that describes the magnetic field generated by a constant electric current is called Biot –Savart law.
A) Given; A0 and B0 = 3cm
I= 30 A and l= 2mm
Bio Savart's law;
dB= μIdl sinФ/4πr
Ф = 45° as ΔAOB is an isosceles triangle and Q is the angle between I dL and r.
dB at point P due to 2mm is;
dB= [μIdl sin45°/4πr][1/(AP)² + 1/(BP)²]
= [μIdl sin45°/4πr] [1/(1/2 AB)²+ 1/(1/2 AB)²]
dB= [μIdl sin45°/4πr] [ 8/ (AB)²]
=[(4π * 10^-7 * 30 *2 *10^-3*1/√2)/ 4π] * 8/18
= 1.948 * 10^-9 T
dB = 1.95 nT
B) Direction of the magnetic field is into the page.
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The graphical representation of vector A has its tail at the origin and its tip in the third quadrant. Vector B has its tail at the origin and its tip in the second quadrant. The resultant R of these two vectors is drawn so that its tail is also at the origin. Which two quadrants could you conclude as possible positions for vector R's tip?
Ensure that the graph has a title that accurately describes the presentation's subject. The measuring unit should be mentioned in the graph. The right scale must be chosen in order to accurately represent the facts.
What are the graphical representation of vector?Similar-direction vectors are referred to as like vectors. Contrarily, vectors that point in the opposite direction from one another are said to be unlike vectors.
Therefore, arrows can be used to graphically represent vectors.The arrow's length provides a measure of the vector's magnitude.The vector's direction is indicated by the direction of the arrow.
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T/F copernican astronomers believed that the earth orbited the sun and rotated on its own axis, while ptolemaic astronomy held that it was motionless.
Insofar as the Copernican cosmos differed from the Ptolemaic universe, the assertion about how it did so is correct.
Why is Ghost missing from Motionless in White?Devin "Ghost" Sola, a bassist for Motionless in White, is no longer with the band. The group revealed that Sola had split ways amicably and had decided to go to the next phase of his career in a statement posted on social media. 2011 saw Sola's band debut.
Motionless: What is it used for?He was on the ground, unmoving. He briefly held her in his arms while appearing to dance without moving. He remained immobile and with his eyes closed after being placed on his camp bed for a considerable amount of time.
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When an RLC-circuit is connected to a constant voltage E at time t=0, the current I in the circuit can be solved from the differential equation L⋅d^2I/dt^2+R⋅dI/dt +I/C=0 Where resistance R, inductance L and capacitance C are constants. Solve the equation with the initial conditions I(0)=0 and dI/dt(0)=E/L and assuming that (R/2L)^2−1/LC<0 I(t)=?
By dividing each side of the voltage triangle by its current, I, an impedance triangle for a series RLC circuit can be created. The source voltage is equal to I*Z, the voltage across the two reactive elements is I×X = I×XL – I*XC, and the voltage drop across the resistive element is equal to I*R.
What RLC-circuit is connected to a constant voltage?At resonance, the impedance, Z, is at its lowest value, (=R), because the current flowing through a series resonance circuit is the product of voltage divided by impedance.
Therefore, the circuit current will be at its maximum V/R value at this frequency.
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(02.02 LC)
Alison rode her skateboard 39 meters in 22 seconds. What is her speed?
O a
O b
Oc
0.56 m/s
0.8 m/s
1.3 m/s
1.8 m/s
1.3 m/s is the speed . when Alison rode her skateboard 39 meters in 22 seconds.
Option C is correct
How is quizlet's pace determined?Divide the distance traveled by the time required to cover that distance to determine an object's speed. This formula is speed=distance/time (s=d/t). A unit of distance is divided by a unit of time in the speed equation.
What data is required to determine velocity and speed?Calculating Speed and Velocity The ratio of the object's total distance over a period of time to that period is used to determine speed. The ratio of a displacement interval to the time taken, on the other hand, allows one to calculate velocity.
speed=distance/time (s=d/t )
S = 32 / 22 = 1.3 m/s
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1. Hussein is 40 and he has an IQ score of 150. Which statement is true about Hussein's IQ score?
Hussein's mental image is 15.
Hussein's intelligence is below average.
Hussein's intelligence is average.
Hussein intelligence is above average.
Answer:
Hussein's intelligence is above average.
Explanation:
An IQ score of 150 is considered to be very high, and indicates that Hussein's intelligence is well above average. The average IQ score is 100, and scores above 130 are considered to be in the range of highly gifted individuals. Therefore, it is likely that Hussein has a high level of intelligence. However, it is important to note that IQ tests are not perfect measures of intelligence, and there are many other factors that contribute to a person's overall level of intelligence.
Can anyone tell me what is new about atomic theory over the last 23 years?
Answer:
The modern atomic theory establishes the concepts of atoms and how they compose matter. Atoms consist of negatively charged electrons around a central nucleus composed of more massive positively charged protons and electrically neutral neutrons. The atomic model changes over time because the atomic model was based on theories and discoveries.
Explanation:
I hope it helps
04
Production methods to produce solar cells
06
Future trends in solar cells
The production methods to produce solar cells are as follows;
GenerationSeparationCollectionThe future trends in solar cells include:
introducing AIreducing costsimproved durabilityWhat are the production methods to produce solar cells?Solar cells are cells that use solar energy to produce electricity. These cells are also called voltaic cells.
The solar energy from the Sun is collected by these and then converted to electrical energy.
The production methods to produce solar cells include the following processes:
Generation - electron-hole pairs are generated due to the absorption of photons in a semiconductorSeparation - separation of electrons and holes to the n-sides and p-side respectively.Collection - electrons are collected by the front contact and holes are collected by the back contact leading to the separation of charges and production of photovoltage.Learn more about solar cells at; https://brainly.com/question/29729669
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Using the velocity versus time graph, caculate the acceleration of Object A.
A) -0.33 m/s^2
B) -3 m/s^2
C) 3 m/s^2
D) 0.33 m/s^2
Please help I'm giving 100 points and The Brainlest to whom ever answers it. Thank you in advance <3
From the given velocity vs time graph, the acceleration of object A is equal to 3 m/s². Therefore, option C) is correct.
What is acceleration?Acceleration can be demonstrated as the rate of change of an object's velocity of an object with respect to time.
Acceleration can also be calculated from the second derivative of position w.r.t. time or the first derivative of velocity w.r.t. time.
[tex]\displaystyle a =\frac{dv}{dt}[/tex]
Given, on the velocity versus time graph for object A:
at time t₁ = 1 sec, the velocity v₁ = 3 m/s
At time t₂ = 2 sec, the velocity v₂ = 6 m/s
Acceleration of the object A can be calculated as:
[tex]\displaystyle a= \frac{v_2-v_1}{t_2-t_1}[/tex]
[tex]\displaystyle a= \frac{6-3}{2-1}[/tex]
a = 3 m/s²
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15. The Stanford-Binet test was used during World War 1 to identify individuals for officer status.
True
False
Answer:
True.
Explanation:
The Stanford-Binet test was developed by Alfred Binet and Theodore Simon in 1905 to measure intelligence. It was first used during World War I to identify individuals for officer status in the United States Army. The test was later revised and is still used today as an intelligence test for children and adults.
the drawing shows two perpendicular, long, straight wires, both of which lie in the plane of the paper. the current in each of the wires is i
The magnitudes of gross magnetic fields at sites A and B are 2.66 x T, and the magnetic field there is identical because the distance between the two wires is equal. Using the right-hand rule as a guide
What do magnitudes mean in physics?The simplest definition of magnitude in physics is "distance or quantity." In either a relative or absolute meaning, it displays the size or motion of an object. It serves as a technique to convey the size or breadth of something.
What is an illustration of magnitude?Size is referred to as magnitude. A automobile is traveling more quickly than a bike, for instance, when it comes to speed. In this case, the car is moving faster than the bike by a larger margin. In terms of motion, it describes the absolute or relative size or direction that an item goes.
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40k undergo beta decayed, electron capture, and positron decayed. write the equation for each of these nuclear reactions
The equation for each of these nuclear reactions is Nucleus A -> Nucleus B + beta particle (-1 charge) + neutrino (0 charge).
Beta decay is a type of radioactive decay in which an atomic nucleus emits a beta particle (an electron or a positron) and transforms into an atomic nucleus with one less atomic number and one more atomic mass. The equation for beta decay can be written as:
Nucleus A -> Nucleus B + beta particle (-1 charge) + neutrino (0 charge)
where Nucleus A is the parent nucleus, Nucleus B is the daughter nucleus, and the beta particle and neutrino are the products of the reaction.
Electron capture is a type of radioactive decay in which an atomic nucleus captures one of its own electrons and transforms it into an atomic nucleus with one less atomic number and the same atomic mass. The equation for electron capture can be written as follows:
Nucleus A + electron (-1 charge) -> Nucleus B + neutrino (0 charge)
where Nucleus A is the parent nucleus, Nucleus B is the daughter nucleus, and the neutrino is the product of the reaction.
Positron decay is a type of radioactive decay in which an atomic nucleus emits a positron (a positively charged particle with the same mass as an electron) and transforms into an atomic nucleus with one less atomic number and one less nuclear mass. The equation for positron decay can be written as:
Nucleus A -> Nucleus B + positron (+1 charge) + neutrino (0 charge)
where Nucleus A is the parent nucleus, Nucleus B is the daughter nucleus, and the positron and neutrino are the products of the reaction.
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Which image shows an object or objects moving with accelerated motion?
An image which shows an object or objects moving with accelerated motion is: A. image A.
What is an acceleration?In Science, an acceleration can be defined as the rate of change of the velocity of a physical object or body with respect to time.
How to calculate the acceleration of an object?Mathematically, the acceleration of a physical object or body can be calculated by using this formula:
a = (V - U)/t
Where:
a represents the acceleration.V represents the final velocity.U represents the initial velocity.t represents the time measured in seconds.Generally speaking, a physical object would experience an accelerated motion when the rate of change of velocity with respect to time throughout the motion is uniform and in a straight line.
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A woman is carrying a bag of apples around the grocery store. When she wasn't looking, a researcher added an apple to the bag and then examined if she noticed anything. The researcher is interested in looking at the __________________ threshold.
The biological approach examines psychological difficulties by investigating the physical basis for animal and human behavior.
It is a key perspective in psychology that entails researching the brain, immunological system, neurological system, and genetics. Data refers to the observations and measurements made during an experiment. Data collection is an essential aspect of the scientific process because it allows the experimenter to keep track of what is going on during the experiment. This branch of psychology is sometimes known as biopsychology or physiological psychology. Studying the physical basis for animal and human behavior provides a new perspective on psychological concerns. by investigating the physical basis for animal and human behavior.
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in 2021, which of the following miscellaneous deductions remain deductible, and are not completely disallowed, although they may have been allowed as deductions subject to the 2 % percent of adjusted gross income (agi) limitation
Miscellaneous deductions subject to the 2% limit fall into the following three categories:
Un-reimbursed Employee ExpensesTax Preparation Fees Other expensesWhat are miscellaneous tax deductions?
Other individual deductions are deductions subject to the 2% Adjusted Gross Income (AGI) limit. You may claim certain expenses as personal deductions on Schedule A (Form 1040), Schedule A (1040-NR), or as income adjustments on Forms 1040 or 1040-SR.
In general, nonresident aliens in one of the eligible employment categories are entitled to deductions so long as they are directly related to income effectively related to the pursuit of trade or business in the United States.
Miscellaneous deductions subject to the 2% limit fall into the following three categories:
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A 12-N net force
acts on a 4-kg jug of water. What is the
resulting acceleration of the jug? Show your
calculations.
Answer:
The resulting acceleration of the jug is 3 m/s^2.
Explanation:
To calculate the resulting acceleration of the jug, we need to use the equation F = ma, where F is the force applied to the object, m is the mass of the object, and a is the acceleration of the object.
Plugging in the values given in the question, we get:
F = ma
12 N = (4 kg) * a
Solving for a, we get:
a = F/m
a = (12 N) / (4 kg)
a = 3 m/s^2
Therefore, the resulting acceleration of the jug is 3 m/s^2.
There is a full box containing 10 kg of wood chips. We measured the box volume which is 0.0137 m3. We also know there is significant void space between the soybeans, but do not have a specific value for the voids.
What is the bulk density of the wood chips?
The bulk density of the wood chips is 729.93 kg/m3
What is bulk density?Bulk density is defined as the mass of the material's numerous particles divided by the entire volume occupied. Particle volume, inter-particle void volume, and internal pore volume are all included in the overall volume. Bulk density is a feature of powders, grains, and other "split" materials. It is also known as apparent density or volumetric density.
D = M / V
Where,
D = bulk density
M = weight of the container
V = Container volume
According to the given question,
Mass of the wood chips = 10kg
Box volume = 0.0137m3
Bulk density of wood chips = Mass of the wood chips/Volume of the box
= 10 / 0.0137
= 729.93 kg/m3
The bulk density of the wood chips is 729.93 kg/m3
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three different forces are shown pulling on a heavy trapdoor. which force will have the biggest turning effect
The force that will have the biggest turning effect on the heavy trapdoor is the one that is applied the furthest from the pivot point, or the point around which the trapdoor rotates.
How does Force have effect on Heavy Trapdoor?The farther a force is from the pivot point, the greater the lever arm is, and the greater the turning effect it will have. For example, if there is a force being applied to the edge of the trapdoor, it will have a larger turning effect than a force being applied closer to the pivot point. Similarly, a force being applied to the top of the trapdoor will have a larger turning effect than a force being applied to the bottom.
It's also important to consider the magnitude of the forces being applied. If one force is much larger than the others, it will have a greater turning effect, even if it is applied closer to the pivot point.
It's worth noting that the forces acting on the trapdoor may be balanced, meaning that they cancel each other out and do not cause the trapdoor to rotate. In this case, the trapdoor will remain in its current position.
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suppose that a star has a spectrum that includes red, blue, and violet lines spaced in the pattern of the lines from hydrogen but the violet lines are at 424nm and 400nm instead of the usual 434nm and 410nm. from this evidence, you can conclude that the star is
Star has a spectrum that includes red, blue, and violet lines spaced in the pattern of the lines from hydrogen but the violet lines are at 424nm and 400nm instead of the usual 434nm and 410nm. from this star is Moving towards us.
Information about a star's temperature, chemical make-up, and inherent luminosity can be found in its spectrum. A series of photographs taken at various wavelengths of the slit in the star's light make up spectrograms produced by slit spectrographs. Astronomers can identify an element by its spectral lines, as well as its temperature and density within the star. The magnetic field of the star can also be shown via the spectral line. How quickly the material is travelling can be determined by the line's width. This teaches us something about the winds in stars. The object is also referred to as the "Seven Sisters" and Messier 45, and its English name comes from a Greek tale. The Pleiades are seven of Atlas, the Titan deity, and the Pleiades' daughters.
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A professional football player kicks a football with an initial velocity v = (15.0 m/s )ˆ x ^ + (19.0 m/s )ˆ y ^ . How long the football stays in the air is known as the hang time.
Answer:
3.87 s
Explanation:
When the y component = 0, the ball is at its apex and 1/2 of the way through its flight.
vy = 19 + at where a = - 9.81 m/s
0 = 19 - 9.81t shows the one-half-flight 't' = 1.94 s
double this result to get total 't' = 3.87 s