The potential difference across a resistor in a particular electric circuit is 420 V. The current through the resistor is 19.0 A. What is its resistance (in Ω) ?

A penny is placed on a rotating turntable. Where on the turntable does the penny require the largest centripetal force to remain in place? Give your reasoning.

How many amps does a 60 watt light bulb use when it's powered by 120 volts

What mechanical layer lies below the lithosphere

Transmission Lines and Health. Currents in dc transmission lines can be 100 A or higher. Some people are concerned that the electromagnetic fields from such lines near their homes could pose health dangers.

A warm front forms when A. cold air moves up over warmer air. B. a warm air mass meets another air mass of the same temperature. C. warm air glides up over colder air. D. the temperature in a warm air mass increases.

Subject: Science Why is it important to report experimental results honestly even when the results go against your hypothesis?

A thin rectangular piece of wood floats in water. You slowly pour oil with a density equal to that of the wood on the surface of the water until the height of the oil above the water is twice the height of the piece of wood.

Calculate the force between a 0.05 C charge and a 0.03 C charge 2 meters apart.

Why might a plant that normally grows in one environment not grow well in a different one?

The gun, mount, and train car of a railway had a total mass of 1.22 x 10^6 kg. The gun fired a projectile that was 80 cm in diameter and weighed 7502 kg. In the firing, the gun has been elevated 20 degrees above the horizontal.