A 6000 kg rocket is launched vertically from the ground. If the exhaust speed is 1000 m/s, how much gas must be ejected each sec
1 answer:
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Gravitational force between sun and planet is given by,
Thus, The force of gravitation is inversely proportional to the distance.
Kepler's law states that the square of period of planet is proportional to cube of semi major axis of its orbit.
The time period of planet is more when the gravitational force is less.
Thus, planet Y is closer to earth because sun exert greater gravitational force than planet Z.
Answer:
1.9976 m
Explanation:
An iron bar whose initial length is 2m has its temperature increased from 20 ° C to 120 ° C. What is the final length of the bar? (consider that the coefficient of expansion of iron) is 1.2 x 10-5 1 / ° C (3 points)
Given that,
Initial length of an iron bar,
The temperature increased from 20°C to 120°C
The coefficient of expansion of iron is
We need to find the final length of the bar.
The linear expansion equation is given by :
Where is the change in length
Also,
L is final length
So, the final length of the bar is 1.9976 m
Answer:
0.85V
Explanation:
The emf is calculated by using the Lenz's Law
But for this case we have that the magnetic field is constant. Hence we have
where we have taken that the intial time is t1=0
I hope this is useful for you
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