An undiscovered planet, many lightyears from earth, has one moon in a periodic orbit. this moon takes 23.0 days on average to complete one nearly circular revolution around the unnamed planet. if the distance from the center of the moon to the surface of the planet is 2.060×105 km and the planet has a radius of 4.000×103 km, calculate the moon's radial acceleration a=/s^2

Answer asap! the weather patterns on earth are shown in this image. explain why there are convection currents; why there are hotter and colder parts of earth.

Asystem containing an ideal gas at a constant pressure of 1.22×10^5 pa gains 2140 j of heat. during the process, the internal energy of the system increases by 2320 j. what is the change in volume of the gas?

During a medieval siege of a castle, the attacking army uses a trebuchet to hurl heavy stones at the castle walls. if the trebuchet launches the stones with a velocity of at an angle of 50.0°, (a) how long does it take the stone to hit the ground? (b) what is the maximum distance that the trebuchet can be from the castle wall to be in range? (c) how high will the stones go? show all your work.