Briefly explain how an electric motor works.

16. A balloon with a radius of 16 cm has an electric charge of 4.25 * 10-9 C. a. Determine the electric field strength at a distance of 40.0 cm from the balloon's centre. E=kq/r^2 (8.99 x 10^9) (4.25 x 10^-9) / (0.40) ^2 =1492.5N/C b.

Waves will have the highest speed in_ • air at 0°C air at 5°C air at 20°C air at 30°C

Larry designed an experiment to show how heat can be transferred from one place to another. The steps of the experiment are shown below. Light a candle. Place palm of the hand about 6 inches above the flame.

If rainwater is always acidic then what would it's ph be?

According to the first law of thermodynamics what could happen when heat is added to a system

If you put in 10 J of work to push 1 c of charge against and electric field what will be its voltage with respect to its starting position? when released, what will be it's kinetic energy if it flies past it's starting position?

The process of changing the energy of a system by means of force. Force * Diatance

A gnat takes off from one end of a pencil and flies around erratically for 18.6 seconds before landing on the other end of the same pencil. If the gnat flew a total distance of 7.15 meters, and the pencil is 6.

An apple falls from an apple tree growing on a 20° slope. the apple hits the ground with an impact velocity of 16.5 m/s straight downward. what is the component of the apple's impact velocity parallel to the surface of the slope?

Objects falling through the air experience a type of friction called air resistance. true or false