What device is created with a battery, iron nail and coiled wire?

A: An electromagnet

B: A motor

C: A closed circuit

D: A series circuit

4. A helicopter is flying at a height of 1.5km. If it has 50MJ of G. P. E., what is the mass of the helicopter?

Which type of investigation would most likely be conducted to answer the following question? What will happen to plant height if the amount of available light is reduced due to global dimming? collected comparative descriptive experimental

If u saw long scratch marks on a flat rock surface you would suspect

An amusement park designer wants his swing to have a centripetal acceleration of 19 m/s2. If the velocity of the swing is 17 m/s, how long should the chain on the swing be? O A. 14.8 m O B. 14.0 m 15.2 m 13.6 m

18. A net force of 1.0N acts on a 4.0-kg object, initially at rest, for 4.0 seconds. What is the distance the object moves during the same time? Be sure to show all work to support your answer.

A firefighter mounts the nozzle of his fire hose a distance 36.9 m away from the edge of a burning building so that it sprays from ground level at a 45° angle above the horizontal. After quenching a hotspot at a height of 8.

A force is applied to a 13.0 kg wagon to pull it down the sidewalk at a constant speed. The coefficient of kinetic friction is 0.65. Considering the resulting frictional force, what is the magnitude of the applied force?

What field (s) does a moving electron have? A. electric and gravitational fields B. magnetic and gravitational fields C. gravitational, electric, and magnetic fields D. electric field only

Copper has a specific heat of 0.385 j. A piece of copper absorbs 5000 J of energy and undergoes a temperature change from 100 Celsius to 200 degrees Celsius. What is the mass of the piece of copper?

I need to learn some interesting facts, any smart people out here?