When using nitrogen in repairing a sealed refrigeration system the nitrogen tank should always be equipped with a:?

A bullet of 10g strikes a sand bag at a speed of 100 m/s and gets embedded after travelling 5 cm inside the bag. Calculate the resistive force exerted by the sand on the bullet and the time taken by the bullet to come to rest. with calculation

Which of the following best describes what occurs in a fusion reaction?

An ideal solenoid of length L, N windings, and radius b (L is much longer than b). A current I is flowing through the wire windings.

Which of the following would add more resistance? Check all that apply. A. long thin wires B. Heat C. Multiple bulbs in a series D. Insulators E. High voltage battery

What best describes the energy of a sound wave as it travels through a medium

When a the irregularities of one surface come into contact with those of another surface, occurs

What type of wave passes through the spring in the frog toy? Why?

Different kinds of substances have different properties of metals

Magma appears to be rising underneath the mid-oceanic ridges. a. True b. False

The energy required to crack a material