A current of 12 A flows for 20 minutes into an electric cooker. How much charge has the cooker used?

By what factor would a person's weight be increased if Earth had 10 times its present mass, but the same volume?

Transverse waves are being generated on a rope under constant tension. Determine the factor by which the required power is changed in each of the following situations. (a) The angular frequency is doubled, and the amplitude is halved.

How much power does a hair dryer require to transform 198 000 J of energy in 15 mins?

Clothes dryer uses about 7 amps of current from a 240 volt line. How much power does it use?

A 50.0-kg box is being pushed along a horizontal surface by a force of 250 n directed 28.0o below the horizontal. the coefficient of kinetic friction between the box and the surface is 0.300. what is the acceleration of the box?

The luminous star Alnilam in the Orion belt is 1,340 light-years away from Earth. Use the conversion factor 1 parsec = 3.262 light-years to find the closest conversion of this distance from light-years to parsecs (pc).

How do astronomers know what conditions exist inside the Sun?

An object is moving but we don't know its mass or velocity. A force of 20 newtons to the right is exerted on the object for 20 seconds. What is the (vector) change in linear momentum for the body as a result of this impulse?

Which friction-reducing technologies are used in the Variable Compression Turbo Engine?

A quadraphonic car stereo operates on electric current provided by the car's 12V battery and is connected in series. Each channel of the stereo, which feeds the electrical signal to one of the stereo's four speakers, has a resistance of 4.1 oums.