What are meant by the statement relative density of gold are 19.3

A particular frost-free refrigerator uses about 710kWh of electrical energy per year. Express this amount of energy in J, kJ, & Cal.

Calculate the specific heat capacity of substance having mass 5 kg whose temperature increase from 15°C to 25°C by the supply of 19 KJ

Where is potential chemical energy stored?

An orchestra is practicing a piece that is to be played at an allegro tempo. The conductor sets a metronome at 160 beats per minute to keep everyone at the same pace. What is the period of a single beat

Which of the following area true? 1. A time-varying electric field will produce a magnetic field. 2. A time-varying magnetic field will produce an electric field. 3. Electric and magnetic fields can be treated independently only if they vary in time.

A wave is moving toward shore with a velocity of 18.0 m/s. If its period is 4 s, what is its wavelength? Explain your answer.

Describe how the Catapult works?

Anything dissolved in water

Length of two cylinders are measured to be L1 = 5.62 + / - 0.01cm and L2 = 4.34 + / - 0.02cm. calculate difference in error and error limit.

If you push an object twice as far while applying the same force, you do ...