Answer:
a)
b)
Explanation:
a)
We can use conservation of energy between these heights.

Therefore, the lost energy is:
b)
The force acting along the distance create a work, these work is equal to the potential energy.


Let's solve it for F.


Therefore, the force is:

I hope is helps you!
Answer:
The AMOUNT of oxygen and carbon atoms released by photosynthesis are EXACTLY EQUAL to the atoms of these material contained in carbon-dioxide converted. In this way photosynthesis has conserved the mass or material, and in this way followed the law of conservation of mass.
Answer:
The length and the magnification of this telescope are 41 cm and 0.108.
Explanation:
Given that,
Focal length of first lens f= 4.0 cm
Focal length of other lens f'= 37 cm
We need to calculate the length of the telescope
Using formula of length

Put the value into the formula

We need to calculate the magnification of the telescope
Using formula of the magnification

Put the value into the formula


Hence, The length and the magnification of this telescope are 41 cm and 0.108.
Explanation:
An object that is partly or completely submerged experiences a greater pressure on its bottom surface than on its top.