A matchstick has a lot of chemical energy stored in it. When the match is struck, it burns and the chemical energy in it produces heat energy and light energy.
Answer:
I need to obtain the brainlist
Explanation:
Give it to me now peasant
Potential energy, is energy due to its position.
Given: Mass m = 40 Kg; Height h = 50 m
Required: Potential energy P.E = ?
Formula: P.E = mgh P.E = (40 Kg)(9.8 m/s²)(50 m)
P.E = 19,600 J
B. Learn and follow the local rules about open fires, camp stoves, kerosene lanterns, and other sources of fire.
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.