Which device is used to increase or decrease the voltage of an alternating

current?

O

A. A commutator

O

B. A generator

O c. A motor

O

D. A transformer

With no difference in temperatures and 100% humidity, will it rain?

When a candle burns, which forms of energy does the chemical energy in the candle change to?

What does the principle of the constancy of lightspeed tell us about the speed of light?

the other end of the pipe. With the aide of the pipe, does the applied force produce a smaller torque, a greater torque, or the same torque on the nut?

Which type of process happens without gain or loss of heat

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

How big is a wifi pulse signal coming from your router? A) 10 meters B) 15 meters C) 5-10 meters D) 20-30 meters