Which of the following statements describes a way that simple machines make work easier?

reduce the amount of energy needed to perform a task

change the direction of the input force

reduce the size of the input force needed to perform a task

A sample of an unknown compound is vaporized at. The gas produced has a volume of at a pressure of

A large ball of steel has a mass of 500 kg. A smaller ball of steel of mass of 75 kg is placed some distance from the larger ball.

This is a group of elements from the periodic table that have their outer level electrons in the same period as the row in which they are located.

The star Betelgeuse is about 600 light-years away. If it explodes tonight, A. we'll know because debris from the explosion will rain down on us from space. B. we'll know it immediately because it will be brighter than the full Moon in the sky. C.

The primary source of most of the moisture for the earths atmosphere is

The density of uranium is 18.8 g/cm3. part a what is this value in kilograms per cubic meter?

What name is given to the variable we plot on the x-axis? A. The dependent variable B. The independent variable c. The linear variable D. The inverse variable

What force is required to accelerate a body with the mass of 15 kilograms at a rate of 8m/s2?

Indicate whether the statement is true or false. A scientific fact is something that is absolute and unchanging.

Show the formula and caculate the speed of a car that traveled 100 km in 2 hours