Physics, 05.01.2020 07:31 ethanmel21

The ultraviolet light that causes suntans (and sunburns! ) has a typical wavelength of 300 nm. what is the frequency of these rays?

Answers: 1

Show answers

Other questions on the subject: Physics

Physics, 22.06.2019 13:40, crayons18

An ideal otto cycle has a compression ratio of 10.5, takes in air at 90 kpa and 40°c, and is repeated 2500 times per minute. using constant specific heats at room temperature, determine the thermal efficiency of this cycle and the rate of heat input if the cycle is to produce 90 kw of power.

Answers: 2

continue

Physics, 22.06.2019 15:50, ksiandua07

An object with initial temperature 130 ∘ f is submerged in large tank of water whose temperature is 50 ∘ f . find a formula for f ( t ) , the temperature of the object after t minutes, if the cooling constant is k = − 0.2 . remember newton's law of cooling (the rate of change of temperature with respect to time is equal to k times the difference between the temperature of the object and the surrounding temperature) ! : )

Answers: 1

continue

Physics, 22.06.2019 16:50, fsugg9168

Abird flies directly overhead from where you stand at an altitude of 300.0 m and at a speed horizontal to the ground of 20.0 m/s. the bird has a mass of 2.0 kg. the radius vector to the bird makes an angle \thetaθ with respect to the ground. the radius vector to the bird and its momentum vector lie in the xyxy-plane. what is the bird’s angular momentum about the point where you are standing?

Answers: 2

continue

Physics, 22.06.2019 18:00, srice6

Write a hypothesis about the effect of increasing resistance on the current in the circuit. use theformat and be sure to answer the lesson question. “how do changes in voltage or resistance affect current in an electric circuit? ”

Answers: 3

continue

You know the right answer?

The ultraviolet light that causes suntans (and sunburns! ) has a typical wavelength of 300 nm. what...