To hear a train approaching from far away, why is it more convenient to put the ear to the track?

A magnetic field produced by a current has the following characteristic (s) A. their field can be turned on and off B. they can have their strength changed C. their direction could be reversed D. All of the above E. none of the above

If the magnitude of the resultant force is to be 490 / ({/rm n}/), directed along the positive / (/texttip{y}{y}/) axis, determine the magnitude of force

In a cold winters day, if you left a cup of water sitting outside, it could freeze. Heat is transferred out of the water. Describe the behavior of the water molecules and how temperature is affected. Enter your answer in the space provided.

How do you add vectors in two dimensions

Faraday's law of induction deals with how a magnetic flux induces an emf in a circuit. recall that magnetic flux depends on magnetic field strength and the effective area the field is passing through.

During combustion, a fuel's electromagnetic energy is converted into thermal energy.

Explain why glucose is important to a cell

4. How far does a car travel in 90 seconds if it is traveling at a speed of 55 m/s?

Total energy input is 1400 and my efficiency is 80% so what is the useful energy output in jules?

What is the force of gravity acting on a 2000-kg spacecraft when it orbits two Earth radii from the Earth's center (that is a distance r=6380 km above the Earth's Surface. The mass of the Earth is 5.98 x 1024 kg.