Astudent standing on the ground next to a tall building throws a ball straight up with a speed of 39.2 m/s. if it takes the ball 4 seconds to reach the same height as the top of the building, how tall is the building?

How many neutrons does element x have if it’s stormy umber is 33 and it’s mass number is 95?

An uplifted block of rock between two normal faults

Consider an ordinary, helium-filled party balloon with a volume of 2.2 ft3. the lifting force on the balloon due to the outside air is the net resultant of the pressure distribution exerted on the exterior surface of the balloon. using this fact, we can derive archimedes’ principle, namely that the upward force on the balloon is equal to the weight of the air displaced by the balloon. assuming that the balloon is at sea level, where the air density is 0.002377 slug/ft3, calculate the maximum weight that can be lifted by the balloon. note: the molecular weight of air is 28.8 and that of helium is 4.