18. A person pulls horizontally with a force of 64 N on a 14-kg box. There is a force of friction between the box and the floor of 36 N. Find the acceleration of the box in m/s2.

If a star is moving away from you how does it affect the wavelength of the light waves that reach you?

How does the resistance of a 100w light bulb compare to the resistance of a 60w light bulb?

A capacitor with a capacitance of 490 μf is charged to a voltage of 260 v. then a wire is connected between the plates. how many joules of thermal energy are produced as the capacitor

If a block is suspended from a string does the gravitational force do any work on it?

A 60-watt bulb is plugged into standard house voltage of 120 volts. calculate the energy in joules consumed by the bulb in 24 hours. (round answer to nearest tenth.)

Bob is coming toward you at a speed of 75 km/hr. You throw a baseball in his direction at 75 km/hr. What does he see the ball doing?

Give 3 examples of something with potential energy.

A graph that shows that the pressure of a gas varies inversely with its volume under constant temperature demonstrates A. The pressure law B. The density law C. Charle's law D. Boyle's law

5. Why should the electrons be placed separate from each other (why not together) ?

A battery high rate discharge (load capacity) test is being performed on a 12 volt battery. Technician A says that a good battery should have a voltage reading of higher than 9.6 volts while under load at the end of the 15-second test.