What is a solenoid?

A. a non-magnetic piece of metal

B. a straight wire surrounded by an electric current

C. a coil of wire with an electric current in it

D. one part of a pair of dualnoids

A metal ball with diameter of a half a centimeter and hanging from an insulating thread is charged up with 1010 excess electrons.

3. If the distance of the screen is moved from 100. cm to 200. cm the area of light would in-crease from 150. cm^2 to A. 37.5 cm2 B. 75 cm2 C. 300 cm2 D. 600 cm24. Light is projected onto a screen 75.0 cm from a light source.

The coolant heat storage system is being discussed. Technician A says that the water valve is driven by an electric motor. Technician B says that the storage tank has its own electric water pump. Which technician is correct?

A 20 kg child is on a swing that hangs from 2.4-m-long chains. part a what is her maximum speed if she swings out to a 44 ∘ angle?

A helium-filled balloon is launched when the temperature at ground level is 27.8°c and the barometer reads 752 mmhg. if the balloon's volume at launch is 9.47 * 10^{4} 4 l, what is the volume in liters at a height of 36 km, where the pressure is 73.

Suppose gene A on the left chromosome is damaged and no longer functions. what form of the trait would show? Why?

What is the use of scientific knowledge and research for an action

How do evaporation and condensation relate to heat

Resistance = 0.1 ohm Current = 60 amps Voltage = ? 0.6 6 60 600

The velocity of a roller coaster as it moves down a hill is where v0 is the initial velocity and h is the vertical drop in feet. An engineer wants a new coaster to have a velocity of 90 feet per second when it reaches the bottom of the hill.