Answer: B, they can land themselves now
Explanation:
If the sign of work is negative, that means the force and the motion are in opposite directions.
Let's say you see something roll off of the shelf. You catch it, and you let it down slowly and gently.
Gravity exerted down-force on it and it moved down. Gravity did positive work on it.
YOU exerted UP-force on it and it moved down. YOU did negative work on it.
(Also, the falling object exerted down-force on your hand, and your hand moved down. The falling object did positive work on your hand ! Where did THAT energy come from ? It came from the potential energy that the object had while it was on the shelf. Your hand absorbed that energy on the way down, doing negative work. So the object didn't have any kinetic energy when it reached the floor, and it did NOT splinter the floor or shatter in smithereens. It had barely enough energy left to make a sound when it hit the floor.)
Density is varying through the world’s oceans. The density of ocean water is not uniform.
Answer:
Potential energy, E = 25 mgh
Explanation:
Given that,
Mass of the object, m = 5 m
It is lifted to a height of, h = 5 h
It is required to find the potential energy gained by the object. It is given by the product of object's mass, acceleration due to gravity and heigh above ground. It is given by :
E = 25 mgh
So, the potential energy gained by the object is (25 mgh). Hence, this is the required solution.
The intensity of sunlight on the Earth is about 1367 W/m^2. The earth has to be 131 the distance farther away
This is further explained below.
<h3>What is the
distance?</h3>
Generally, bet the power emitted by the sun is P. so. at the distance of earth intensely where 
is the distance of the earth from the sun. were 
Therefore
p=4 
let at distance 
is a positive number) the intensity is the same as the intensity at 10m away from a 100w bulb. So.
In conclusion,
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