That's a perfect example of a chemical change,
because a new substance is formed.
Friction, lack/loss of kinetic energy
Answer:
The two different ways to measure gravitational potential energy is listed below:
Explanation:
- To measure the gravitational potential energy of the ball dropped from certain height we can use the formula as:
PE= mgΔh
where,
m= mass of the ball
g= gravity
Δh= change in height
- The second way is to follow the principal as:
Loss in PE = Gain in KE
∴ -ΔPE = ΔKE
- Height and mass is the major element that determines the gravitational potential energy of any object.
Answer:
Explanation:
It is given that,
Wavelength of hydrogen line,
Shift in wavelength,
According to Relativistic Doppler Effect, the shift in wavelength is given by :
v is the speed of star
c is the speed of light
or
v = 91.43 km/s
So, the star is moving with a speed of about 100 km/s. Hence, this is the required solution.
C) Energey
A) True
I believe, dont quote me on it