Ll objects are going to emit some amount of light, called thermal radiation, because they are made of charged particles that are always in motion. Which of the following statements about thermal radiation is correct?
1. (All below are true)
2. Objects that are very hot are going to tend to glow blue and in some cases white.3. As an object's temperature increases, the frequency at the peak of its thermal-emission spectrum increases.4. As an object's temperature is increased, it emits more light over the entire EM spectrum.5 -Wein's law: lambda peak (in nanometers) is equal to 2.9 times 10*6 nm kelvin / T in kelvin
Answers: 3
Physics, 22.06.2019 06:30
2kg of refrigerant 134a undergoes a polytropic process in a piston-cylinder assembly from an initial state of saturated vapor at 2 bar to a final state of 12 bar, 80 degree c. a)determine the work for the process in kj. b)sketch the process on a p-v diagram.
Answers: 2
Physics, 22.06.2019 18:30
Aballoon is rising vertically upwards at a velocity of 10m/s. when it is at a height of 45m from the ground, a parachute bails out from it. after 3s he opens his parachute and decelerates ata a constant rate 5m/s.when. (a) what was the height of the parachutist above the ground when he opened his parachute? (b)how far is the parachutist from the balloon at t=3s? (c)with what velocity does the parachutist hit the ground? (d)after how long does the parachutist hit the ground after his exist from the balloon?
Answers: 3
Ll objects are going to emit some amount of light, called thermal radiation, because they are made o...
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