Which term refers to a substance that can only be broken down chemically? A. metals B. molecules C. matter D. mixtures

At t=0 a ball is thrown straight upward from the ground level at speed Vo. At the same instant, a distance D above, a ball is thrown straight downward, also at speed Vo. Where do the balls collide in terms of D, Vo, and g?

A solid, uniform disk of mass M and radius a may be rotated about an axis parallel to the disk axis, at variable distances from the center of the disk. What is Tmin, the minimum period of the pendulum?

An airplane is flying in horizontal flight at a constant velocity. The weight of the airplane is 40,000 N. The wings produce a lift force that is perpendicular to the wings and a drag force that is parallel to the wings.

A wind-up car has a mass of 0.40 kg. The wind-up car is accelerating at 0.40 m/s2. What is the net force acting on the wind-up car?

Which planet is the third closest to the sun?

The half-life of plutonium-238 is 87.7 years. What percentage of the atoms in a sample of plutonium-238 will remain radioactive after 263.

Charge q is 1 unit of distance away from the source charge S. Charge p is four times further away. The force exerted between S and q is ___ the force exerted between S and p. 1/4 1/16 16 times 4 times

A 21.7kg child descends a slide 3.5 m high and reaches the bottom with a speed of 2.2m/s. How much thermal energy due to friction was generated in this process?

Which term refers to a substance that can only be broken down chemically? A. metals B. molecules C. matter D. mixtures

A 12,000-kg lunar landing craft is about to touch down on the surface of the moon, where the acceleration due to gravity is 1.6 m/s2. At an altitude of 158 m the craft's downward velocity is 16.9 m/s.