An electromagnet cannot be shut off once it is started.

True

or

False

What color of light has the most energy? A. Blue B. Red C. Green

Which causes the thermal energy in a building to decrease? the air conditioner and the heat engine the furnace and the heat pump the heat pump and the air conditioner the heat engine and the furnace

A current of 9 a flows through an electric device with a resistance of 43. what must be the applied voltage in this particular circuit? a. 387 v b. 4.8 v c. 387 a d. 4.8 a

What features were the last to form on the moon?

A stone is thrown at an angle of 45 degrees above the horizontal from the top edge of a cliff with an initial speed of 14 m/s. A stop watch measures the stone's trajectory time from top of cliff to bottom to be 6.9 s.

A wave has a wavelength of 10 mm and a frequency of 5 hertz. What is its speed? a. 50 mm/s b. 50 hertz's c. 2 mms d. 0 0.50 mms

Suppose you illuminate two thin slits by monochromatic coherent light in air and find that they produce their first interference minima at / pm 35.09 degrees on either side of the central bright spot.

Tala wants to create a sound echo. She can create the echo using a pane of glass or a carpet square. Which one does she choose? Explain.

a the average distance from the Sun to Pluto is approximately 6.10 x 1 0 ^9. how long does it take light from the sun to reach Pluto?

A 25kg object moves from left to right at a speed of 30km/h. What net force is required to keep this object moving in a straight line at constant speed