Answer:
Work, in physics, refers to the measure of energy transfer that occurs when an object is moved over a distance by an external force at least part of which is applied in the direction of the displacement.
Hey there!
Work is defined as the the force which gets applied to an object in order to displace (move) it. For example, you work in order to walk up & down the stairs. For this, you need to apply force as well. So, work done = force × distance.
Hope it helps!
How do you calculate the number of ejected electrons?
The number of ejected electrons in a photoelectric effect experiment can be calculated using the following formula:
What are electrons?
An electron is a subatomic particle that has a negative electric charge. It is one of the fundamental building blocks of matter, along with the proton and neutron. Electrons are found in the outermost region of an atom, called the electron cloud or electron shell.
number of ejected electrons = intensity of light * time of exposure
where intensity of light is the intensity of the light beam (usually measured in watts per square meter), and time of exposure is the length of time that the light beam is shone on the metal surface.
Alternatively, the number of ejected electrons can be calculated using the following formula:
number of ejected electrons = current * time of exposure
where current is the current flowing through the circuit (usually measured in amperes), and time of exposure is the length of time that the light beam is shone on the metal surface.
Therefore, the number of ejected electrons is proportional to the intensity of the light beam and the length of time that it is shone on the metal surface.
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20 points, will give brainliest.
If 37 newtons of force is applied to the object pictured above with 6 newtons of friction...
Answer: 31 N
Explanation:
Forces in the y-direction (Fn and Fg) are balanced. (ΣFy = 0)
ΣFx = Fa- Ff = 37N - 6N = 31N
FILL IN THE BLANK. the volume of 0.15 mol of an ideal gas at 365 torr and 97 °c is ________ l.
"The volume of 0.15 mol of an ideal gas at 365 torr and 97 °C is calculated to be 9.5 L."
The ideal gas law asserts that the pressure, volume, and temperature of an ideal gas are all directly correlated. An ideal gas is a fictitious gas that adheres to this law.
Given the number of moles, temperature, and pressure, the ideal gas law can be used to determine the volume of an ideal gas.
The ideal gas law equation is, PV = nRT.
When the equation is rearranged to account for volume, the result is
V = nRT/P. Plugging in the given values, the volume of 0.15 mol of an ideal gas at 365 torr and 97 °C is 9.5 L.
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A hot stovetop transfers thermal energy by the method of
This is due to the contact between the bottom of a
cooler pot with the warmer burner on the stove.
Answer:
Conduction is the answer!!!
Explanation:
(can you try to help me with my most recent questions) ty
For a fixed height h2 if you plot v2kin versus d, what kind of curve would you get?
1.a parabola
2.a horizontal line parallel to the x-axis
3.a straight line with a negative slope of sqrt (g/2h2)
4.there is not sufficient information to answer this question
5.a straight line with a positive slope of sqrt (g/2h2)
The plot of v²kin versus d, where, v is the velocity of motion and d is the distance travelled, is a graph of a quadratic equation, which is a parabola. The correct option is 1 a.
1 a, Parabola
What is a quadratic equation?A quadratic equation is an equation of the form a·x² + b·x + c = 0, which is an algebraic equation with a second degree of x.
The motion of a body in free fall can be described using the following equation;
v² = u² - 2·g·h
d = u·t - 0.5·g·t²
Therefore; v² = 0² - 2·g·d = 2·g·d
v² = 2·g·d
d = v²/(2·g)
Where; g = The acceleration due to gravity ≈ 9.8 m/s²
Therefore; d ≈ v²/(2 × 9.8)
The above equation is a quadratic equation, and the graph of the equation, which is a graph of a quadratic equation is parabolic.
Please find attached the graph of v²/(2×9.81) to d, creates with MS Excel
From the shape of the graph and the function of the graph, the graph is a parabola
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What is kinetic energy short answer?
Joe pushes a 12,000 N car, starting from rest, with a force of 310 N for 20 seconds. (a) What is the magnitude of the car's acceleration? (b) How much force would be needed to stop the car in a distance of 30 m?
The acceleration of the car can be obtained as 0.26 m/s^2. The force required to ove it a distance of 30 m is 11760 N.
What is the acceleration?We know that the acceleration is the change in the velocity of the object with time. Now we know from the Newton law that the force is the product of the mass of the object and the acceleration.
Now we have that;
weight = mass * acceleration due to gravity
mass = weight/ acceleration due to gravity
mass = 12,000 N / 10 m/s^2
= 1200 Kg
The we know that;
Force = mass * acceleration
acceleration = Force/mass
= 310 N/1200 Kg
= 0.26 m/s^2
For the force that that is needed to move the car a distance of 30 m we have;
F = ma
= 1200 Kg * 9.8 m/s^2
= 11760 N
This is the force that ca move the object forward.
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When an object is moving with uniform circular motion, the object’s tangential speed?
Answer:
is constant
Explanation:
When an object is moving with uniform circular motion, the object’s tangential speed is constant.
What force makes an object slide?
The force of sliding is the force required to keep an object moving at a constant velocity while it is sliding on a surface.
This force is equal in magnitude to the force of friction acting between the object and the surface, but opposite in direction. The force of friction acts between two surfaces that are in contact and is directed opposite to the direction of motion. When an object is sliding on a surface, the force of friction acts to slow the object down and eventually bring it to a stop.
If the object is moving at a constant velocity, the force of friction is equal in magnitude to the force applied to the object, but opposite in direction. This force is known as the force of sliding.
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What happens when magnesium becomes a 2+ ion?
When magnesium becomes a 2+ ion its becomes cation that is positive charge.
Due to its 12 protons and membership in group 2 of the periodic table, magnesium possesses two electrons in its outer shell (positive charges)
We know that ionic substances consist of two ions, one of which is a positive cation and the other is a negative anion. For instance, cations and anion are produced when we divide ionic substances into their individual ions.
(a), Breaking of [tex]$\mathrm{MgBr}_2$[/tex] into ions '
[tex]\left.\mathrm{MgBr}_2_(aq) \longrightarrow \mathrm{Mg}_{(\mathrm{aq})}^{2+}+2 \mathrm{Br}_{\left(a q_1\right)}{ }^2\right[/tex]
Cation formula [tex]$=Mg^{2+} (a q)$[/tex]
Anion Formula [tex]$=\mathrm{Br}^{\ominus}(a q)$[/tex]
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How would newton law of motion relate to the movement of bumper car how might the ma of the rider and the peed of the car affect thi movement
According to the Newtons third law of motion, the collision between the bumper car and the rider will affect both of them as both the systems have mass and are moving with certain velocities.
Collision is a case where one moving object or person violently collides with another.
The law of interaction or the Newton's third law of motion, says that if one body exerts a force on a second body, the second body exerts a force equal in magnitude and opposite in direction on the first body.
It's the law of action-reaction, and it helps to explain why you feel a jolt when you collide with another bumper car.As we know momentum is P = m*v i.e. momentum (P) is directly proportional to the mass and velocity.
Heavier bodies have more mass, therefore have more momentum.
here, the bumper car is the heavy system and hence, it will exerts more impact on the rider.
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A wheel i rotating about an axi that i in the z-direction. The angular velocity ωz i -6. 00 rad/ at t = 0, increae linearly with time, and i 4. 00 rad/ at t = 10. 0. We have taken counterclockwie rotation to be poitive. I the angular acceleration during thi time interval poitive or negative?
The time interval during which the speed of the wheel is increasing is 4 s.
What is angular acceleration?The temporal rate at which angular velocity changes is known as angular acceleration. The standard unit of measurement is radians per square second.
Calculation:The angular velocity at time t = 0, is ω₁ = - 6.00 rad/s.
The angular velocity at time t = 10.0 s, is ω₂ = +4.00 rad/s.
Angular acceleration of the wheel = change in angular velocity /time interval= ( 4.00 - (-6.00))/10 rad/s²
= 1.0 rad/s²
Hence, angular velocity becomes zero at time = ( 0 - ( -6))/1.0 s = 6 s.
So, during t = 0 to t = 6s, the clockwise angular velocity of the wheel decreases from 6.00 rad/s to 0.00 rad/s and during t = 6s to t = 10s , the counterclockwise angular velocity of the wheel increases from 0.00 rad/s to +4.00 rad/s.
Hence, the time interval during which the speed of the wheel is increasing is = 10 s - 6 s = 4 s.
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How do you solve properties of parallel lines cut by transversal?
When the alternative interior angles of two lines cut by a transversal line are equal, they are parallel.
Alternate interior angles are two angles on the inside side that are opposite each other. When the alternate exterior angles of two lines cut by a transversal line are equal, they are parallel. Alternate external angles are two angles on the outside that are opposite each other. Four sorts of angles are created when parallel lines are sliced by a transversal. Examine the diagram below to identify the many pairs of angles and their relationships. The picture depicts two parallel lines 'a' and 'b' separated by a transversal 'l'.
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a force produces power p by doing work w in a time t what power will be produced by a force that
The power that will be produced by such a force is 12 times the initial power.
What is power?Power can be defined as the time rate of doing work. Also power can be defined as the energy expended per unit time.
Mathematically, the formula for power expended by an object is given as;
p = E / t
where;
p is the powerE is the energyt is the timep = w / t
where;
w is the work doneWhen a force does six times as much work in half as much time, the power becomes;
p' = (6w) / (¹/₂t)
p' = (2 x 6w) / t
p' = 12w/t
p' = 12 (p)
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The complete question is below:
a force produces power p by doing work w in a time t what power will be produced by a force that does six times as much work in half as much time?
A loaded truck can accelerate at 4.3m / (s ^ 2) It loses its load so that it is only 0.2 as massive. By what factor must the acceleration change for the same driving force?
The new acceleration of the truck for the same driving force is 21.5 m/s^2.
What is force?
The definition of force in physics is: The push or pull on a massed object changes its velocity.
An external force is an agent that has the power to alter the resting or moving condition of a body. It has a direction and a magnitude. A spring balance can be used to calculate the Force. Newton is the SI unit of force.
Given that: A loaded truck can accelerate at 4.3m/s^2.
It loses its load so that it is only 0.2 as massive.
As force = mass × acceleration, the new acceleration of the truck for same driving force is = (4.3 ÷ 0. 2) m/s^2
= 21.5 m/s^2
Hence, the new acceleration of the truck is 21.5 m/s^2.
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a block of mass m is released from rest and slides down an incline, as shown in the figure. the length d of the incline is 0.8 m and the angle of the incline, θ, is 37°. a graph of the speed v as a function of time t of the block as it descends the incline is shown. how could a student use the graph and the information provided to determine whether the block-earth system is an open system or a closed system?
The system is open, because there is a net force exerted on the block.
What are some instances of kinetic energy?An individual strolling, a taking off baseball, a piece tumbling from a table and a charged molecule in an electric field are instances of dynamic energy at work. An item that isn't moving has zero motor energy.
The energy an item has as a result of motion is known as kinetic energy. A force must be applied to an item in order to accelerate it. We must put forth effort in order to apply a force. After the job is finished, energy is transferred to the item, which then moves at a new, constant speed.
According to question:
On graphing free body diagram of the problem
There is a force = mgsin(37°)
So, the it is a open system.
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a ball is kicked at an angle of 40 degrees with the ground with the initial velocity of 15m/s. the ball reaches point b after 1.5 seconds. 1. what is the initial velocity in the y-direction? 2. what is the final velocity in the x-direction (at point b)? 3. what is the range, xb, in meters? 4. what is the height, hb, when the ball reaches point b, in meters?
(1) The initial velocity in the y-direction is 9.64 m/s.
(2) The final velocity in the x-direction is 11.5 m/s.
(3) The range, xb, of the ball is 22.6 m.
(4) The maximum height reached by the ball is 4.74 m.
What is the initial vertical component of the velocity?The initial vertical component of the velocity is calculated using the following kinematic equation.
Vy = V sinθ
where;
V is the initial velocity θ is the angle of projection of the ballVy = V sinθ
Vy = ( 15 m/s ) x ( sin 40 )
Vy = 9.64 m/s
The final velocity in the x-direction is calculated as follows;
Vₓf = Vxi = V cosθ
where;
Vₓf is the final horizontal velocity Vₓi is the initial horizontal velocityVₓf = ( 15 m/s ) x ( cos 40 )
Vₓf = 11.5 m/s
The range of the ball is calculated as follows;
R = v² sin (2θ) / g
R = ( 15² sin (2 x 40) ) / 9.8
R = 22.6 m
The maximum height reached by the ball is calculated as;
H = v² sin²θ / 2g
H = ( 15² x ( sin 40 )² ) / (2 x 9.8)
H = 4.74 m
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Which electromagnetic wave has the lowest frequency?
Radio waves are the types of EM radiation with the lowest energy, longest wavelengths, and lowest frequencies.
What are radio waves?The electromagnetic spectrum's longest wavelengths, which are found in radio waves, are normally found at frequencies of 300 gigahertz (GHz) and lower. The wavelength for 30 Hz is 10,000 kilometers (6,200 miles) while the wavelength for 300 GHz is 1 mm (shorter than a grain of rice) (longer than the radius of the Earth). Like all electromagnetic waves, radio waves move at the speed of light in a vacuum and at a nearly same, slightly slower speed in the Earth's atmosphere. Charged particles, such as time-varying electric currents, that are accelerating produce radio waves.For more information on radio waves kindly visit to
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What are the 10 examples of force?
Answer:
1.Opening and shutting a door
2.Squeezing water out of wet clothes
3.Punching a pillow
4.Stomping your foot
5.Pushing a manual mower
6.Ripping a piece of paper
7.Crushing a ball of dough
8.Pulling out an ingrown hair from your leg
9.Pulling a light chain
10.Smacking a horses butt to signal it to "GIDDIE UP!"
Explanation:
At which scale factor will the pre-image and image be congruent?
The picture and the pre-image are consistent ONLY when the scale factor is 1.
What is the dilation image pre-scale image's factor?A sort of transformation known as a dilatation enlarges or shrinks a figure (referred to as the preimage) to produce a new figure (called the image). How much larger or smaller the dilation image will be in comparison to the preimage depends on the scale factor, r.
What is the minimum scale factor required for the image to be congruent?The scale factor and the center of dilation are used to determine the dilation transformation. The image stretches if the scaling factor is greater than 1.
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What is the speed of EM waves in a vacuum in km s?
All electromagnetic waves travel at the same speed in a vacuum, which is 300,000 km/sec (186,000 mph). This results from the electromagnetic waves' oscillating nature.
How fast is an electromagnetic wave in a vacuum?In general, we say that light moves in waves and that all electromagnetic radiation moves through a vacuum at a speed of around 3.0 * 108 meters per second. Nothing can move faster than the speed of light, which is what we refer to as.
What is the vacuum's speed?The universal scientific constant known as c—the speed of light in a vacuum—is significant in many branches of physics. The exact value of the speed of light, c, is 299,792,458 meters per second.
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What is the unit of frequency and wavelength?
The greater efficiency achieved with the curved blades of a pelton wheel is due to
The greater efficiency achieved with the curved blades of a Pelton wheel is due to the fact that the curved shape of the blades allows them to more effectively capture and use the energy of the water jet.
In a Pelton wheel, water is jetted through a nozzle onto the blades of a turbine, which rotates and converts the energy of the water jet into mechanical work. The shape of the blades plays a significant role in the efficiency of the turbine. Curved blades are more efficient than straight blades because they can capture and use more of the kinetic energy of the water jet.
The curved shape of the blades creates a more efficient flow of water over the surface of the blade, which allows the blade to extract more energy from the water jet. This results in a higher torque and power output from the turbine, leading to a more efficient conversion of water energy into mechanical work.
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how long will a bus take to travel 150 km at an average speed of 40km/h answer
A 0.290-mm-diameter silver wire carries a 40.0 mA current. What is the electric field in the wire? Express your answer with the appropriate units. What is the electron drift speed in the wire? Express your answer with the appropriate units.
Answer:
E = 0.0096 N/C
Explanation:
E = I/σπr²
I = 40 mA = 0.04A
σ silver = 6.29X10⁷ /Ωm
r = 0.29 mm/2 = 0.145 mm = 1.45x10⁻⁴ m
E = 0.04A / (6.29X10⁷ /Ωm)(π)(1.45x10⁻⁴ m)² = 0.0096 N/C
*sorry, don't have time to calculate electron drift velocity for you!
Skyler whose mass is 74.5 kg is moving across at 9.52 m/s while holding a 2.05 kg carefully packed snowball forward with speed of 15.9 m/s . Determine Skyler velocity after throwing the snowball .
Skyler velocity after throwing the snowball is 9.34 m/s in forward direction.
What is velocity?A body's velocity is the rate at which its displacement alters with respect to time. A vector quantity with both magnitude and direction is velocity. The meter/second unit of measurement for velocity.
Given that Skyler whose mass is 74.5 kg is moving across at 9.52 m/s while holding a 2.05 kg carefully packed snowball.
forward speed of the snowball = 15.9 m/s.
Let the Skyler velocity after throwing the snowball = v.
According to principle of conservation of momentum;
Total initial momentum = total final momentum
⇒ (74.5 + 2.05)9.52 = 74.5×v + 15.9×2.05
⇒ 74.5×v = (74.5 + 2.05)9.52 - 15.9×2.05
⇒ v = 9.34 m/s.
Hence, velocity of the Skyler is 9.34 m/s. in forward direction.
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A sports car has a mass of 1500 kg and accelerates at 5 m/s every second. What is the net force on the car?.
The needed force is therefore F=ma=15000.5=750 N. The car accelerates at 3 m/s2 and needed 4500 N of force to get to the destination 5 seconds after starting,
the car reaches a speed of 5 metres per second.
The sports car weighs 1500 kilogrammes.
The sports car's acceleration is equal to 5 m/s2.
Therefore, let F be the force acting upon it.
The rate of doing labour is called power. Work is the result of the applied force and the distance travelled along the force's direction by the moving body accelerates.
The formula for Newton's second law must be used to compute the force, and the specified values must be entered into the formula. So let's get going. Car weight is 1500 kg. Speed is equal to 10 m/s2.
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Why does this bright and dark pattern happen when light goes through the two slits?
The bright and dark pattern happen when light goes through the two slits because of interference of light.
What is interference of light?When two coherent light waves from separate sources collide, the energy distribution caused by the first wave is altered by the second. The term "interference of light" refers to this alteration in the distribution of light energy brought on by the superposition of two light waves.
The conditions of interference of light are:
The two light sources should continuously emit waves with the same wavelength and duration, or phase coherence.The two light sources ought to be situated quite close to one another.It should be impossible for two sources' waves to have any phase difference at all.Learn more about interference here:
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what is the mathematical formula to calculate resistance when the value of voltage and current are known
Voltage divided by current equals resistance (R=VI R = V I). Ohm's Law (E = IR) is as basic to electronics students as Einstein's Relativity equation (E = mc2) is to physicists.
When written down, voltage = current x resistance, or volts = amps x ohms, or V = A x. According to Ohm's law, the current flowing through a conductor between two places is proportional to the voltage across the two points. According to Ohm's law, the current flowing through a conductor between two places is proportional to the voltage across the two points. The formula for Ohm's law is V I. As a result, V = RI, where R is a constant known as resistance.
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the gas undergoes an isothermal compression from point 2 until the volume is restored to the value it had at point 1. what is the final pressure of the gas? express your answer to two significant figures and include the appropriate units.
The final pressure of the gas is 3atm.
As given in the question,
The volume of the gas at point 1 ( [tex]V_1[/tex]) is 1000 [tex]cm^3[/tex]
The volume of the gas at point 2 ( [tex]V_2[/tex]) is 3000[tex]cm^3[/tex]
The pressure of the gas ([tex]P_2[/tex]) is 1 atm
For an isothermal process , the temperature of the system remains constant so,
The formula to find the pressure of the gas is
[tex]P_1V_1=P_2V_2[/tex] ----(1)
Where
[tex]V_1[/tex] is the volume of the gas at point 1
[tex]V_2[/tex] is the volume of the gas at point 2
[tex]P_1[/tex] is the pressure of the gas at point 1
[tex]P_2[/tex] is the pressure of the gas at point2
now substitute the values given in the question in the equation (1),
[tex]P_1V_1=P_2V_2\\P_1 =\frac{ P_2V_2}{V_1}[/tex]
=>[tex]P_1[/tex] = [tex]\frac{1\times 3\times10^{-3} }{1\times 10^{-3} }[/tex]
=> [tex]P_1[/tex] = 3
Pressure is 3 atm
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