Projectile motion in a sentence?

A hot-air balloon has a volume of 440 * 10^3 ^3. Calculate the buoyant force that the surrounding cold air exerts on the balloon? Given that the density of the surrounding air is 2.58 kg/^3.

If the force on the tympanic membrane (eardrum) increases by about 1.4 N above the force from the atmospheric pressure, the membrane can be damaged.

Why is the chemical formula magnesium sulfide written as MgS and NOT Mg2S2?

One form of interference with satellite transmission is called raindrop attenuation in which the transmissions are absorbed by heavy rain. True False

An elevator weighs 1500 Newtons. Calculate how much potential energy it has when it is lived 500 meters in the air. 75,000 J 750 J 7,500,000 J 750,000 J

Why do the upper levels of Neptune's atmosphere appear blue?

An athlete has a mass of 62 kg and a volume of 65 liters. What is the density is kg/l?

A wave has a speed of 50m/sec if its frequency is 100 hz what's it's wavelength

11. A depression in the ground due to a cave collapse or acidic water dissolution of limestone is called a A. sinkhole. B. stalagmite. C. stalactite. D. cave.

A thin hoop is hung on a wall, supported by a horizontal nail. The hoop's mass is M=2.0 kg and its radius is R=0.6 m.