In a european country a bathroom scale displays its reading in kilograms. when a man stands on this scale, it reads 98.9 kg. when he pulls down on a chin-up bar installed over the scale, the reading decreases to 82.2 kg. what is the magnitude of the force he exerts on the chin-up bar?

Which types of electromagnetic waves have higher frequencies than the waves that make up ultraviolet light? check all that apply. radio waves infrared light microwaves gamma rays visible light x-rays

The astronauts on the space shuttle flights experienced an acceleration of 29 m/s2 (about 3 "g's") during lift-off. what upward force must the astronaut's seat apply to the astronaut in order to cause this acceleration? assume the astronaut's mass is 70 kg, and compute this force when the acceleration is near the earth's surface so their weight equals latex: mg m g .

Explain what will happen if decomposers were apsent from a forest ecoysystem.