Why do some appliances have step-down transformers built in?

Give the number of neutrons in the following isotope: hydrogen-3

A boat can travel 48 miles upstream in 4 hours. the return trip takes 3 hours. find the speed of the boat in still water and the speed of the current.

A DC voltmeter may be used directly to measure a) frequency b) polarity c) power factor d) power

When a car drives in a circle, what is the centripetal force?

who did more work a man walking 20km up a hill in 1 hour or a man bycicling 20km up the same hill in 30 minutes

How many watt-hours does a 80 watt light bulb use if it runs for 3.5 hours?

A series circuit contains two devices, one with a resistance of 10 ohms and one with a resistance of 4 ohms. If the generator supplies a voltage of 42 V, what is the magnitude of the current? A. 2 A B. 3 A C. 1.75 A D. 1.33 A

What is the relationship between speed and the slopes of the lines on a graph

The basic building blocks of matter are called

A Heavy crate applied a force of 1500 N on a 25m2 piston. What force needs to be applied on a 0.8m2 piston to lift the crate?