Which statement is true?
A. Light waves always travel at a constant speed, but sound waves do...
Physics, 09.04.2020 21:35 jazminpratt0311
Which statement is true?
A. Light waves always travel at a constant speed, but sound waves do not.
B. Waves travel at different speeds through different materials.
C. Light waves and sound waves travel at the same constant speed.
D. Wave speed depends on the amplitude of the wave.
Where do most of the visible electromagnetic waves on Earth come from?
A. X-rays
B. radio waves
C. the sun
D. fluorescent lights
Yellow light and blue light are two examples of electromagnetic radiation from the sun. Which statement correctly compares yellow light and blue light?
A. They have the same wavelength.
B. They are both types of ultraviolet light.
C. They are both types of visible light.
D. They travel at different speeds.
Answers: 2
Physics, 21.06.2019 20:40
If an object with an initial temperature of 300 k increases its temperature by 1°c every minute, by how many degrees fahrenheit will its temperature have increased in 10 minutes? (a) 6°f (b) 10°f (c) 18°f (d) 30°f
Answers: 3
Physics, 21.06.2019 22:30
Solar cell a produces 100 joules of energy, when a light source is shown on it for 3 minutes. solar cell b produces 200 joules of energy when the same light source is shown on it for 5 minutes. which solar cell works better? a) solar cell b, because it produces more energy. b) solar cell b, because it generates more power. c) solar cell a, because it produces energy quicker. d) solar cell a, because it generates a greater wattage. eliminate
Answers: 2
Physics, 22.06.2019 01:30
Ajet plane has a sound level of 120 db at a distance of 60 m. what is the q23. sound level at a distance of 6.0 km? (60)2 (6000)? om solution 80db db, hint: 16x assume ultrasound waves travel through the body of an animal at 1540 q24. m/s. if a 30,000 hz signal were reflected off a portion of a heart which was moving toward the source at 3 m/s, what frequency signal would return to the stationary source? solution 30.117hz
Answers: 3
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