Answer:
Speed Unchanged.
Explanation:
As work is defined as a product of force over a distance. If the distance in altitude is constant = 500km, there's 0 change in distance and force, no work would be done by the gravitational force.
Since potential energy of the satellite is unchanged, unless there's additional internal energy source, the kinetic energy would remain unchanged, so would its speed.
Answer:
Barometer also called barometric pressure.
Answer:
Explanation:
Given:
mass of glass cup,
initial temperature of glass,
final temperature of glass,
specific heat of glass,
So, the heat energy absorbed by the cup to reach the final temperature is given by:
where:
= change in temperature
Answer:
121km/h
Explanation:
Let speed of boat=xkm/h
Speed of water flow=33 km/h
Speed upstream=(x-33)km/h
Speed downstream=(x+33)km/h
Time=44 hrs
Time =77 hrs
We have to find the speed of boat.
Using the formula
Upstream distance=Downstream distance
Hence, the speed of boat=121km/h