The heat exchange in chemical reactions is due to a change in:

-kinetic energy

-enthalpy

-temperature

-physical properties

What is a simple machine? A. any object that makes work easier when a single force is applied by changing the strength or the direction of that force B. any combination of objects that magnifies the input force so that the output force is greater C.

A machine is designed to lift an object wit a weight of 12 Newton's if the input for the machine is set at 4 Newton's what is the mechanical advantage of the machine

bumper car A (281 kg) moving + 2.82 m/s makes an elastic collision with bumper car B (209 kg) moving + 1.72 m/s what is the velocity of car A after the collision (unit = m/s) remember: right is (+), left is (-)

Which is the chykogon of the hydrogen

Which of the following is not an example of potential energy? chemical energy, gravitational energy, thermal energy, nuclear energy

Projectile motion is a combination of which two types of motion? parabolic and curved straight and diagonal horizontal and vertical constant and linear

If a mass of a material is 100 grams and the volume of the material is 15 cm3, what would the density of the material be?

After three half-lives of an isotope, 1 billion (one-eighth) of the original isotope's atoms still remain in a certain amount of this element. How many atoms of the daughter product would you expect to be present?

A group of two or more stars is called a A. solar system B. neutron star C. protostar D. star system

Which of the following is an example of potential energy? View Available Hint (s) Which of the following is an example of potential energy?