A device that makes work easier by changing the size or direction of a force is called what?

If a small number of tree frogs migrate to a mat of vegetation that is already home to an established population of tree frogs and introduce new alleles into the native population's gene pool, this change is referred to as A the bottleneck effect.

True or False. The magnetic fields of both Uranus and Neptune are highly tilted relative to their rotation axes and significantly offset from the planets' centers.

There are four springs stretched by the same mass. Spring A stretches 25 cm. Spring B stretches 10 cm. Spring C stretches 100 cm. Spring D stretches 1 cm. Which spring has the smallest spring constant? A B C D

Which object moves in simple harmonic motion?/ a stretched rubber band with an mass b rolling ball going down a hill c moving car d orbiting satellite

A particular sound wave can be graphed using the function y=1 sin 4x. Find the amplitude and period of the function

Sharon throws a 0.20 Kg with an acceleration of 10 m/s/s. (a) What force did she exert on the ball? (b) What force did the ball exert on her?

What are three ways that extra carbon is getting to the atmosphere?

A girl runs 20.9 m/s East for 13.7s. How far does she go?

Is it possible to have a weak acid or base?

Why does an object accelerate when falling to earth's surface?