An object has a gravitational potential energy of 24 joules when it rests on a shelf 3 m above the ground. what would be its gra
vitational potential energy when it is lowered to a shelf 1 m above the ground?
1 answer:
The equation for the gravitational potential energy Ep is:
Ep=m*g*h where m is the mass of the body, g=9.81 m/s² and h is the height of the body.
First we need to find the mass of the body:
m=Ep/(g*h)=24/(9.81*3)=0.82 kg
Now lets see what it's gravitational potential energy would be on the height of 1 m.
Ep=0.82*9.81*1 = 8 J
On the height of 1 m the body has a gravitational potential energy of Ep=8 J.
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Answer:
1028 slits/mm
Explanation:
We are given that
Wavelength of light, 
1nm=
n=1
We have to find the number of slits per mm are marked on the grating.
We know that
Using the formula
1m=
mm
Number of slits=
Number of slits=
/mm
Number of slits=1028/mm
Hence, 1028 slits/mm are marked on the grating.
Answer:
60 Amperes
Explanation:
current is the main factor, so current is measured in Amperes
