Which is an example of current electricity? O A. A battery provides electrical energy to power a phone.
O B. Negatively charged particles are repelled by other negatively
charged particles.
O C. A child rubs a balloon against the carpet and then sticks it to a
wall.
D. A person's hair stands up as a wool hat is pulled off.

State the right hand rule of the direction of magnetic field in a conductor carrying current

What is the temperature in degrees celsius of a substance with a tempature of 49k

An air standard cycle with variable specific heats is executed in a closed system and is composed of the following four processes. 1-2 isentropic compression 100 kpa and 22°c to 600 kpa 2-3 v=constant heat addition to 1500 k 3-4 isentropic expansion to 100 kpa 4-1 p=constant heat rejection to initial state (a) show the cycle on p-v and t-s s (b) calculate the net work output per unit mass (409 kj/kg) (c) determine the thermal efficiency (47.9%)