the mass of a 50cm length of wire was 3.5kg .the cross section area of the wire was 0.01cm²..calculate the volume of wire and density of wire​

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.

Gunpowder residue is most likely to show up where on a shooters hands

What is the momentum of a 2 kg object moving at 15 meters per second