Star x has twice the mass of the sun

What process takes place within mitochondria? A: cellular respiration. B: photosynthesis C: protein assembly. D: reproduction

Up-regulation involves the loss of receptors and prevents the target cells from overreacting to persistently high hormone levels. True or False

If an object emits or reflects light, A. it has a smooth surface. B. it can be seen by the eye. C. it must be the color white. D. it cannot be a gas.

A high speed moving train has a momentum of 10,000,000 kilograms-meters per second. it later slows down to one half of its original velocity. what is its new momentum?

With what minimum speed must you toss a 200 g ball straight up to just touch the 14-m-high roof of the gymnasium if you release the ball 1.3 m above the ground? solve this problem using energy.

A 1200 kg car moving at 7.8 m/s collides with a stationary car of mass 1500 kg. if the two vehicles lock together, what is their combined velocity immediately after the collision?

Which have more kinetic energy a 100g ball, a 200g ball, or a 500g ball explain

An internal combustion engine uses fuel, of energy content 44.4 MJ/kg, at a rate of 5 kg/h. If the efficiency is 28%, determine the power output and the rate of heat rejection.

Fleas often live on dogs or cats and bite them for meal of blood. This can be harmful to the cat or dog that is bitten. What type of symbiotic relationship is that?

Who was the scientist that discovered Pluto wasnt a planet