A large beach ball and a small baseball have a mass of 0.5 kg each. They are dropped at the same time from a flying helicopter. After a certain time t each of the two balls is falling down at its terminal velocity. What is the relation between the forces R of air resistance acting on each ball at time t? A) the air resistance on the beach ball is greater than the air resistance on the small baseball.

B) the air resistance on the beach ball is smaller than the air resistance on the small baseball.

C)both air resistances are equal

D) we cannot tell

What is the rate of change in a objects position?

Your starship, the aimless wanderer, lands on the mysterious planet mongo. as chief scientist-engineer, you make the following measurements: a 2.50-kg stone thrown upward from the ground at 14.0 m/s returns to the ground in 5.70 s ; the circumference of mongo at the equator is 2.20×10^5 km ; and there is no appreciable atmosphere on mongo. (a) the starship commander, captain confusion, asks for the following information: what is the mass of mongo? (b) if the aimless wanderer goes into a circular orbit 2.20×10^4 km above the surface of mongo, how many hours will it take the ship to complete one orbit? (c) an unmanned spacecraft is in a circular orbit around the moon, observing the lunar surface from an altitude of 44.0 km . to the dismay of scientists on earth, an electrical fault causes an on-board thruster to fire, decreasing the speed of the spacecraft by 23.0 m/s . if nothing is done to correct its orbit, with what speed (in km/h) will the spacecraft crash into the lunar surface?

How many neutrons does element x if it’s atomic number is 28 and its mass number is 87