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kkurt [141]
4 years ago
10

You do 200 joules of work against gravity when lifting your backpack up a flight of stairs that is 4 meters tall. What is the we

ight of your backpack in newtons?
Physics
1 answer:
kotegsom [21]4 years ago
8 0

Answer:

Correct answer:  F = 50 N  weight of backpack

Explanation:

Given:

W = 200 J    work against gravity

h = 4 m  

F = m g = ?

g = 10 m/s²

The work done is a measure of change in this case of potential energy

W = Δ Ep = m g h = F · h ⇒ F = W / h =

F = W / h = 200 / 4 = 50 N

F = 50 N

God is with you!!!

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rosijanka [135]

Answer:

1. Nitrogen

2. Oxygen

3. Carbon dioxide

4. Water vapor

5. Ozone

Explanation:

The atmosphere composes of 78% nitrogen which occupies the largest percentage followed by oxygen which takes up 21%, Argon takes up 1% then other components such as water vapor occupy between 0-7% and ozone takes 0.0-0.01. Moreover, 0.01-0.1 is occupied by carbon dioxide. Therefore, the answers for 1-5 are as follows.

1. Nitrogen

2. Oxygen

3. Carbon dioxide

4. Water vapor

5. Ozone

4 0
4 years ago
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Naily [24]

Answer:

121.5 J

Explanation:

3 0
3 years ago
Which of the following would have an effect on an object's mass?
ICE Princess25 [194]
None of the above

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if you change the elevation, nothing happens to the mass. the stuff will not leave the object.
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8 0
3 years ago
A table tennis ball with a mass of 0.003 kg and a soccer ball with a mass of 0.43 kg or both Serta name motion at 16 M/S calcula
poizon [28]
Let us first know the given: Tennis ball has a mass of 0.003 kg, Soccer ball has a mass of 0.43 kg. Having the same velocity at 16 m/s. First the equation for momentum is P=MV P=Momentum M=Mass V=Velocity. Now let us have the solution for the momentum of tennis ball. Pt=0.003 x 16 m/s= (    kg-m/s ) I use the subscript "t" for tennis.  Momentum of Soccer ball Ps= 0.43 x 13m/s = (      km-m/s). If we going to compare the momentum of both balls, the heavier object will surely have a greater momentum because it has a larger mass, unless otherwise  the tennis ball with a lesser mass will have a greater velocity to be equal or greater than the momentum of a soccer ball.
8 0
4 years ago
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Why was Copernicus’s heliocentric model not believed until gailileo and Kepler provided more evidence?
mezya [45]

It seems to go against what we see with our eyes. Plus, it contradicted official church doctrine at the time.

8 0
3 years ago
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