All engines operate at less than 100 percent efficiency because they

A. absorb heat

B. conduct heat

C. burn gasoline

D. emit heat

The average mass of an automobile in the United States is about 1.440 * 10^8. express this mass in kilograms

A uniform disk of mass M and radius R has rotational inertia about its central axis of Idisk = 1/2 MR2. A uniform rod of mass m and length R has rotational inertia about its center, perpendicular to its length of Irod = 1/12 mR2.

State the relationship between degrees Celsius and kelvins

an object of mass 0.5kg at rest, started to fall aheigh of 180cm from the surface of earth. it's momentum when it reaches the earth's surface is

Friction is a force that speeds up motion between two surfaces that are in contact

The friends now feel ready to try a problem. Suppose an Atwood machine has a mass of m1 = 2.5 kg and another mass of m2 = 8.5 kg hanging on opposite sides of the pulley. Assume the pulley is massless and frictionless, and the cord is ideal.

What are the 3 main branches of natural sciences

A girl is walking 2km north them east then south then west whar is her displacement

Find the y-component of this vector:73.3,12.0m. Remember, angles are measured from the + x axis.

A smaller unit of volume than a milliliter would be a microliter. A microliter is one-millionth of a liter. Select one: a. True b. False