A condition of the law of conservation of momentum is that no external forces are at play. Look at each of the following situations and choose if the law applies to it. Select all that apply. A. Two cars collide on a dirt road where the force of friction is high.
B. A bullet strikes a wooden block, causing the block to accelerate from rest.
C. Two kinetic carts collide on a frictionless surface.
D. A coin sliding on a table experiences a frictional force.

3. on your graph, the data points between the black squares are data for elements with atomic numbers 3 through 9. locate these elements on your periodic table. what term or description would you use to identify these elements with respect to the periodic table?

The passing of heat through a material while the material itself stays in place. a. radiation b. conduction c. convection

A30 kg weight lies on top of a massless piston of area a = 0.01 m2 the exterior air is at a (constant) p =1 atm and t = 27 c. the interior gas is 0.4 moles of (ideal) n2 and it has initial temperature 27.00 degrees c. 1. what is the initial pressure in the interior? a. 29.4 kpa b. 130.7 kpa c. 101.3 kpa the next three questions concern what happens when an amount of heat q is slowly added to the interior, raising the piston by 1 mm and raising the interior temperature to 27.40 c