A(n) absorbs energy and then emits electromagnetic radiation based on its . Classical physics predicted that at a high enough temperature, light would be emitted. Instead, white light was emitted, resulting in the ultraviolet . The photoelectric effect occurs when light shining on a metal creates a(n) . However, only light of a certain minimum causes electrons to flow. Gas atoms excited by an electric current emit bands of colors of light in a(n) . Each narrow band of light is associated with of a specific energy.

A1000-kg weather rocket is launched straight up. the rocket motor provides a constant acceleration for 16-s, then the motor stops. the rocket altitude 20-s after launch is 510-m. you can ignore any effects of air resistance. a. what was the rocket’s acceleration during the first 16-s? b. what is the rocket’s speed as it passes through a cloud 5100-m above the ground?

True or false when elements combine to form a mixture, the resulting chemical properties may be very different from those of the elements that make it.

A3.9 g aluminum foil ball with a charge of +4.1×10−9 c is suspended on a string in a uniform horizontal e⃗ field. the string deviates to the right and makes an angle of 30∘ with the vertical. part a part complete what information about the e⃗ field can you determine for this situation? what information about the field can you determine for this situation? only the magnitude of e⃗ only the direction of e⃗ both the magnitude and the direction of e⃗ none of the above previous answers correct part b determine the magnitude of the electric field. express your answer with the appropriate units. e e = nothing nothing request answer part c determine the direction of the electric field. determine the direction of the electric field. to the right to the left away from you toward you