Answer:
Change in Kinetic Energy is
Solution:
As per the question:
Mass of space craft,
Mass of the sun, M =
Radius of the orbit, R =
Radius of smaller orbit around the sun, r =
Now,
We know that the Gravitational Potential Energy is given by:
where
G = Gravitational constant
r = distance of the space craft from the center of the sun
Now,
Initial Gravitational Potential Energy is:
Now,
Final Gravitational Potential Energy is:
Change in the Gravitational Potential Energy equals the change in the kinetic energy of the space craft.
Thus
Explanation:
The visible light coming from celestial bodies from space are affected most by the atmosphere. The visible light suffer blurring and absorption. So, to avoid such situation optical telescopes are kept in mountains where atmosphere is thin.
Whereas radio signal are not affected by the atmosphere so, they need not be placed in mountains.However, it is affected by various noises from the man made devices. So, to avoid these noises radio telescopes are kept in deep valleys.
Answer: 3 m/s
Explanation:
The average velocity is simply the change in displacement over the specified time interval. I’m this case, we have a total of four intervals,which represent 4 seconds. Dividing 12 m by 4s gives us 3 m/s
They are called magnetic poles.
Answer:
v=30 m/s
Explanation:
h - height
g - acceleration due to gravity=10
t - time
v- velocity
45 = 5t²
t² = 9
t=3 seconds
v=g×t
v=10×3
v=30 m/s