When I current is running through a coil of wire with an iron core what is created around the wire that is carrying the current?

A. An electric force

B. A magnetic field

C. An electric field

D. A magnetic pole

A 4-A current is maintained in a simple circuit with a total resistance of 2 Ω. How much energy is dissipated in 3 seconds? A) 3 J B) 6 J C) 12 J D) 24 J E) 96 J

The amount of work done to produce a sound determines which property of sound waves? A. amplitude B. frequency C. pitch D. wavelength

When there is a change of state, such as a solid to liquid or liquid to gas, heat energy can be added without a temperature change because A) the added energy is not needed. B) the energy is lost to the system.

8 2/5 - 4 5/6 eight and two fiveths subtracted by four and five sixth

initially at rest. The bullet is traveling 300 m/s when it hits the wood block and sticks inside it. Now the bullet and the wood block move together as one object. How fast are they traveling?

How many neutrons are present in an atom of iron-54? A) 26 B) 28 C) 30 D) 54

Sound waves are mechanical waves in which the particles in the medium vibrate ina direction parrallel to the direction of energy transport. What is another name of the type of wave that transfers energy in this way?

A sound from a source has an intensity of 270 db when it is 1 m from the source. what is the intensity of the sound when it is 3 m from the source?

What experimental term is it when a ruler is dropped to the floor?

Where is most of the energy from incoming waves focused? A. spit B. headland C. underwater D. barrier beach