The light from Barnard's Star takes about 5.94 years to reach Earth. Which of these statements is correct about Barnard's star?

It takes 5.94 years to view its image with a telescope.
It is located at a distance of 5.94 light years from Earth.
It has to travel a distance of 5.94 kilometers to reach Earth.
It has to move at the rate of 5.94 kilometers per hour to reach Earth.

Explain how the energy of rubber ball is tranforned as it roll down a ramp. give evidence that the energy of the og the ball remains the same at all points on the ramp

Acylinder with a movable piston contains 11.7 moles of a monatomic ideal gas at a pressure of 1.32×10^5 pa. the gas is initially at a temperature of 300 k. an electric heater adds 43200 j of energy into the gas while the piston moves in such a way that the pressure remains constant. cp=20.79 j k^−1 mol^−1 for a monatomic ideal gas, and that the number of gas molecules is equal to avogadro's number (6.022×10^23) times the number of moles of the gas. (a) what is the temperature of the gas after the energy is added? (b) what is the change in volume of the gas? (c) how much work is done by the gas during this process?

Which sound characteristic is not affected by the relative motion of an object