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.
Calorimeters can be improved by impeding the loss of heat to the surroundings. A few things can improve this:
better insulation
less surface area to the surroundings
accurate heating
better stirring/mixing mechanism
250m good luck onnur test