A man pushes a shopping cart full of groceries at a constant velocity. What happens if the man DECREASES the force of his push on the cart?
A. The cart slows down.
B. The cart speeds up.
C. The cart moves at the same speed.
D. The cart becomes less massive.
If the man DECREASES the force of his push on the cart, the cart slows down.
Force acting on bodyThe force applied to an object is determined by applying Newton's second law of motion.
F = ma
where;
m is mass of the bodya is acceleration of the bodya = Δv/t
F = (mΔv)/t
mΔv = Ft
Δv = Ft/m
From the equation above, when the applied force decreases, the change in velocity decreases.
Thus, if the man DECREASES the force of his push on the cart, the cart slows down.
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The resulting net force of an object is represented below.
→10 N
Which most likely represent the forces acting on the object?
↑ 63 N and ↓ 73 N
↑ 97 N and ↓ 87 N
← 63 N and → 73 N
← 97 N and → 87 N
Answer: it's c. ← 63 N and → 73 N
Explanation:
A pile of 60 sheet’s of paper is 6mm high. Calculate the average thickness of a sheet of the paper
Answer:
0.1 mm
Explanation:
60 sheets = 6 mm
We want 1 sheet so we divide both sides by 60 :
1 sheet = 6/60 mm
1 sheet = 1/10 mm
1 sheet is 0.1 mm
Hope this helped and brainliest please
The frequency of a certain sound is 440 Mz. What is the wavelength of this sound when the temperature of the air is (a) 20°C; (b) 30°C
Answer:
Explanation:
We know the frequency and the velocity, both of which have good units. All we have to do is rearrange the equation and solve for
λ
:
λ
=
v
f
Let's plug in our given values and see what we get!
λ
=
340
m
s
440
s
−
1
λ
=
0.773
m
Which piece of furniture will have the most inertia and give the furniture movers the most difficulty in moving?
a 50kg couch
a 5kg dining chair
a 75kg dining table
an 10kg end table
Answer:
75kg dining table
Explanation:
its the heaviest
more force would be required to push it
so it has greater inertia
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Answer:
C.
Explanation:
EDGE 2023
[tex] \textbf{Can someone help me with this question ? } [/tex]
[tex] \textsf{I need proper Explanation} [/tex] ~
Recall the formula of refractive index
[tex]\sf \mu =\dfrac{sini}{sinr}[/tex]
i is angle of incidencer is angle of refractionAs per the diagram
At AD angle of incidence i is
[tex]\\ \rm\Rrightarrow \gamma=sin^{-1}\left(\dfrac{1}{\dfrac{n_1}{n_2}}\right)[/tex]
[tex]\\ \rm\Rrightarrow \gamma=sin^{-1}\left(\dfrac{n_2}{n_1}\right)[/tex]
That's reverse for BC tooAt AB's imaginary boundary line
Use snell's law
[tex]\\ \rm\Rrightarrow \dfrac{\mu_1}{\mu_2}=\dfrac{sin\alpha}{sin\beta}[/tex]
[tex]\\ \rm\Rrightarrow \mu_1sin\alpha=\mu_2sin\beta[/tex]
[tex]\\ \rm\Rrightarrow n_2sin\alpha=n_1sin\left(\dfrac{\pi}{2}-\gamma\right)[/tex]
[tex]\\ \rm\Rrightarrow n_2sin\alpha=n_1cos\left(sin^{-1}\left(\dfrac{n_2}{n_1}\right)\right)[/tex]
we need [tex]\sf \alpha[/tex][tex]\\ \rm\Rrightarrow sin\alpha=\dfrac{n_1}{n_2}cos\left(sin^{-1}\dfrac{n_2}{n_1}\right)[/tex]
[tex]\\ \rm\Rrightarrow \underline{\boxed{\bf{\alpha=sin^{-1}\left[\dfrac{n_1}{n_2}cos\left(sin^{-1}\dfrac{n_2}{n_1}\right)\right]}}}[/tex]
Option A
A large truck is moving at 22.0 m/s. if its momentum is 125,000 kg • meters per second, what is the truck's mass? 176 kg 2750 kg 5680 kg 11,400 kg
The mass of the large truck is determined as 5680 kg.
Mass of the truck
The mass of the truck is calculated as follows;
P = mv
where;
P is momentumm is massv is velocitym = P/v
m = 125000/22
m = 5680 kg
Thus, the mass of the large truck is determined as 5680 kg.
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Answer:
C. 5680
Explanation:
edg2023
Express 9.39 x 109 seconds in terms of days.
Answer:
108680.6 days
Explanation:
1 day = 24 hours there is 3600 seconds in 1 hour
so 24 * 3600 = 86400 so there is 86400 second in a day
so the take t = time s = seconds
t = 9.39 * 10^9s * 86400
t = 108680.6 days
Hope This Helped
The hall voltage is the potential created across a current-carrying metal-strip when the strip is placed in a magnetic field perpendicular to the current flow in the strip. it is used as a research tool to probe the movement of charges in materials, as well as determining the blood flow rate. one fundamental use of the hall effect is the determination of the charge of the charge carriers. what of the following statements is true concerning the strips with a positive versus a negative hall voltage?
a) the top strip has positive charge carriers, and the electric field points in the same direction as the electric force.
b) the bottom strip has positive charge carriers, and the electric field and electric force point in the same direction.
c) the top strip has negative charge carriers, which get deflected to the top of the plate.
d) the bottom strip has negative charge carriers, and the magnetic force points upward along the plate.
The statements true concerning the strips with a positive versus a negative hall voltage are a and d.
What is hall voltage?
The hall voltage is the potential created across a current-carrying metal-strip when the strip is placed in a magnetic field perpendicular to the current flow in the strip. it is used as a research tool to probe the movement of charges in materials, as well as determining the blood flow rate.
The top strip possess positive charge carriers, and the electric field points are in the same direction as the electric force.
The bottom strip has negative charge carriers, and the magnetic force points upward along the plate.
This will create an equilibrium of the magnetic force and electrostatic force.
Thus, the correct option are a and d.
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Within the visible spectrum, our experience of red is associated with ________ waves of light.
Within the visible spectrum, our experience of red is associated with a longer wavelength of light.
What is the electromagnetic spectrum?The electromagnetic spectrum is seen as colors: violet, indigo, blue, green, yellow, orange, and red. Blue light has a very short wavelength, and so produces a higher amount of energy.
In the visible spectrum, the longer wavelengths that we perceive as red are followed by intermediate wavelengths for green and shorter wavelengths for blue and violet.
Our perception of red is connected to a longer wavelength of light within the visible spectrum.
Hence longer wavelength is the correct answer for blanks.
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What are 2 factors affecting friction?
Answer:
xhxzguztyayrayhNzxlhhlिगजि
The atmospheric pressure at the surface of titan is.
Answer:
about 1.5 bars
Titan's atmosphere is similar to Earth's both in the predominance of nitrogen gas and in surface pressure, which is about 1.5 bars, or 50 percent higher than sea-level pressure on Earth.
Explanation:
What explains the key difference between a bomb calorimeter and a coffee cup calorimeter?.
The key difference between a bomb calorimeter and a coffee cup calorimeter is high temperature.
What is bomb calorimeter?A bomb calorimeter is an apparatus that can measure heats of combustion, used in various applications such as calculating the calorific value of foods and fuels.
What is coffee cup calorimeter?A coffee cup calorimeter is a cup used to provide insulation when materials are mixed inside of it.
Difference between the two calorimeterThe coffee cup calorimeter can't be used for high-temperature reactions, either, because they would melt the cup. A bomb calorimeter is used to measure heat flows for gases and high-temperature reactionsLearn more about calorimeter here: https://brainly.com/question/1407669
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A bicycle is ridden along a horizontal road with a driving force of 400, n,400n. its speed is constant at 12, m, slash, s,12m/s. what is the magnitude of the sum of the frictional forces acting on the bike and its rider?
The magnitude of the sum of the frictional forces acting on the bike and its rider is 400N.
What is friction force?The friction force is the opposing force which acts on the object which is in relative motion.
The driving force is equal and opposite to the friction force acting between road and bicycle.
Friction force = 400N
The friction force between rider and bike is zero.
So the magnitude of sum of friction force = 400N +0 = 400N
Thus, the magnitude of the sum of the frictional forces acting on the bike and its rider.
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It takes 25N or force to drag a box along the floor at a constant speed. If the coefficient of friction is .3, what is the mass of the box?
The mass of the box is 8.5 kg.
What is mass?Mass can be defined as the quantity of matter contained in a body.
To calculate the mass of the box, we use the formula
Formula:
F = mgμ............. Equation 1Where:
F = Forcem = mass of the boxg = acceleration due to gravity μ = coefficient of frictionMake m the subject of the equation
m = F/gμ..................... Equation 2From the question,
Given:
F = 25 Ng = 9.8 m/s²μ = 0.3Substitute these values into equation 2
m = 25/(0.3×9.8)m = 25/2.94m = 8.5 kgHence, the mass of the box is 8.5 kg.
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What is the net force needed to lift a full grocery sack (weighing 210 N) uniformly? What is the net force
needed to accelerate the grocery sack upward at 1.5 m/s2 ?
The net force needed to lift a full grocery sack uniformly is 32.115 N.
What is Net force?When two or more forces are acting on the system of objects, then the to attain equilibrium, net force must be zero.
Given the weight of sack W = 210N and the acceleration a = 1.5m/s².
The mass of the sack will be
m = Weight / acceleration due to gravity
m = 210 N/9.81 m/s²
m = 21.41 kg
Using Newton's second law, the net force will be
F = mass x acceleration
F= 21.41 x 1.5
F = 32.115 N
Thus, the net force is 32.115 N.
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which is heavier a pound of bricks or a pound of feather
Answer:
pound of bricks
meh wrong ? XD
Answer:
neither is heavier.both are equal
Explanation:
since 1 pound equals 16 oz.(1 pound=16 oz.).,both are equal too!
A train traveled 250 km from its starting point in 5 hours. If the train continues at the same average speed for another 4 hours, what is the total distance traveled from its starting point?
Answer:
200
Explanatio
sample ananswer
On Earth's surface at sea level, what is the weight of an object with a mass of 180 kg?
860 newtons
1764 newtons
400 newtons
200 pounds
Considering the definition of weight, on Earth's surface at sea level, the weight of an object with a mass of 180 kg is 1764 N.
What is weightMass is the amount of matter that a body contains and weight is the action exerted by the force of gravity on the body.
The mass of an object will always be the same, no matter where it is located. Instead, the weight of the object will vary according to the force of gravity acting on it.
The weight is calculated as the product of the mass of the object and the value of the gravitational acceleration or gravity:
Weight= mass× gravity
The value of the acceleration constant on Earth is 9.8 m/s². The weight is proportional to the mass of the object. The unit of weight is expressed in Newton (N).
Weight of the object in this caseIn this case, you know:
mass= 180 kggravity= 9.8 m/s²Replacing on the definition of weight:
Weight= 180 kg× 9.8 m/s²
Solving:
Weight= 1764 N
Finally, on Earth's surface at sea level, the weight of an object with a mass of 180 kg is 1764 N.
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Define the term rest and motion with one example of each.
Explanation:
What is rest ?
A body is said to be rest if it does not change its position with respect to its surroundings.....Example:a book on the table .....( it does not change its position with respect to the table )
What is motion ?
A body is said to be in motion if it can change its position with respect to its surroundings....Example : a football kicked by a player.....[tex]...[/tex]
Question : What is Rest ?
Answer : An object is said to be at rest if it does not change its position with respect to its surrounding time .Example ...
StatueSleepingstaringstandingunmoved vehiclestopped clockDress kept in a hanger untouched sitting etc......Question : What is Motion ?
Answer : An object is said to be in motion if it position changes with respect to its surrounding and time .Example ....
The moving FanThe dust falling from the carpetThe water that flows from the tapa ball rolling around a moving car etc ......HOPE IT HELPS UPLEASE MARK AS { BRAINLIEST }21. A 1000-kg automobile moving with a speed of 24 m/s relative to the road collides with a 500-kg automobile initially at rest. If the two stick together, what is the velocity in m/s of the two cars after the collision according to an observer in a truck moving 10 m/s in the same direction as the moving cars
A truck is moving with less velocity in the direction in which the truck is moving earlier because the truck has more momentum.
In which direction the truck moves?A truck is moving with the velocity of 10 m/s in the same direction in which the truck is moving earlier because the truck has more mass so it has more momentum. Due to collision, the velocity of the truck is slow down but can't be stopped because of high momentum in the truck.
So we can conclude that a truck is moving with less velocity in the direction in which the truck is moving earlier because the truck has more momentum.
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Think about the videos you have watched.
Why is there a need for government regulation, and what limits need to be placed on these regulations?
Give your answer in the form of a short paragraph.
Answer:
they protect public safety and market fairness. For example, food safety regulations help protect consumers from pathogens that could cause widespread illness
Answer:
Government regulations are necessary because they protect public safety and market fairness. For example, food safety regulations help protect consumers from pathogens that could cause widespread illness. By creating regulations, the government can make food-borne illness less likely. However, even though these regulations are necessary, they must still meet constitutional requirements. Producers and consumers have the right to own and use property, among other constitutional rights.
Explanation:
EDGE 2023
An object is moving along the x axis. At t = 5.6 s, the object is at x = +3.0 m and has a velocity of +5.7 m/s. At t = 8.5 s, it is at x = +9.0 m and its velocity is -1.0 m/s. Find the average acceleration between t = 5.6 s and t = 8.5 s.
The average acceleration between t = 5.6 s and t = 8.5 s is 2.31 m/s²
What is acceleration?Acceleration is defined as the rate change of velocity with time.
acceleration a = (Δv) / (Δt)
An object is moving with initial velocity u =5.7 m/s and its final velocity v= -1.0 m/s.
Time taken for the change in speed, t= 8.5 - 5.6 = 2.9 seconds
The acceleration is given by
a = (-1 - 5.7)/ 2.9
a = - 2.31 m/s²
|a | = 2.31 m/s²
Thus, the object's acceleration is 2.31 m/s²
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Which two types of waves can transmit energy through a vacuum?
1.radio waves
2.seismic waves
3.sound waves
4.water waves
5.x-rays
Given what we know, we can confirm that amongst the wave types mentioned both X-rays and radio waves are able to transmit energy through a vacuum.
How can these waves propagate through a vacuum?This is due to the fact that unlike sound, water, and seismic waves that transmit energy through air, water, or the earth, the waves mentioned above, those being radio and x-rays, do not need a medium through which to propagate. This allows them to exist and transmit energy even in a vacuum such as outer space, which is corroborated by their existence in space.
Therefore, we can confirm that amongst the wave types mentioned both X-rays and radio waves are able to transmit energy through a vacuum.
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Answer:
we can confirm that amongst the wave types mentioned both X-rays and radio waves are able to transmit energy through a vacuum.
Explanation: Edmentum
A pendulum is lifted and released, causing the pendulum to oscillate in
periodic motion. If losses due to friction and air resistance can be ignored,
what types of energy conversions are involved in this system?
A. Energy is converted between gravitational potential, elastic
potential, and kinetic energy.
OB. Energy is converted between gravitational potential and elastic
potential energy.
C. Energy is converted between kinetic and elastic potential energy.
OD. Energy is converted between kinetic and gravitational potential
energy.
SUBMIT
Answer:
D. Energy is converted between kinetic and gravitational potential energy.
Explanation:
Question 10 of 34
Julia walks from the park 6 blocks east of her house to the store 3 blocks
east of her house. The walk takes Julia 5 minutes. What is her average
velocity on this walk?
OA. 0.6 blocks/min east
OB. 1.2 blocks/min
O C. 1.8 blocks/min
OD. 0.6 blocks/min west
Julia walks from the park, which is six blocks east of her house, to the store, which is three blocks east of her house. Julia walks for 5 minutes. This walk's average speed will be 1.2 blocks per minute. Option B is correct.
What is displacement?Displacement is defined as the shortest distance between the two points. Distance is the horizontal length covered by the body. While displacement is the shortest distance between the two points.
Displacement is a vector quantity .its unit is m.
The average velocity on this walk will be;
[tex]\rm v_{avg}= \frac{d}{t} \\\\ \rm v_{avg}= \frac{6 \ block+ 3 \ block }{5 \ minute } \\\\ v_{avg}=1.4 \ block /min[/tex]
Hence option B is correct.
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when a metal sphere is dropped in to a tall cylinder containing liquid its acceleration is g÷2 (gravity over 2) show that : density of metal =2density of liquid
The density of the metal sphere is 2 times the density of the liquid as proved.
Net upward force acting on the metal sphere
The net upward force acting on the sphere as it is dropped into the liquid is calculated as follows;
F = σVg - ρVg
ma = σVg - ρVg
where;
ρ is density of the liquidσ is the density of the metala is acceleration of the metalσV(a) = σVg - ρVg
σ(a) = σg - ρg
σ(g/2) = σg - ρg
g(σ/2) = g(σ - ρ)
σ/2 = σ - ρ
σ/2 - σ = - ρ
-σ/2 = - ρ
σ = 2ρ
Thus, the density of the metal sphere is 2 times the density of the liquid as proved.
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a tape is weighed and found to weigh 1.95 lb. the overall length of the 100-ft tape (end to end) is 102.00 ft. the specific weight of steel is 490 lb/ft?. what is the cross-sectional area of the tape?
The cross-sectional area of the tape is determined as 3.9 x 10⁻⁵ ft².
Volume of the tape
The volume of the tape is calculated as follows;
volume = mass/density
volume = (1.95 lb)/(490 lb/ft³)
volume = 3.98 x 10⁻³ ft³
Area of the tapeV = AL
A = V/L
A = 3.98 x 10⁻³ ft³/102 ft
A = 3.9 x 10⁻⁵ ft²
Thus, the cross-sectional area of the tape is determined as 3.9 x 10⁻⁵ ft².
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Marking as brainliest last attempt
(ZOOM IN THE PHOTO) use the graphic organizer for writing ur paragraphs
write a paragraph about the topic : bullying in schools
How does the government involve in a child or young person’s upbringing in your
country?
The government are involved in a child or young person’s upbringing in my country by providing the right amenities and ensure the justice system is fair.
What is Upbringing?This is defined as the way an individual treated at a young age by older adults such as parents.
Providing amenities will ensure the upbringing of the child is easier and a fair justice system will help to control crime.
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