Answer:
13.5 km/h
Explanation:
John runs for 10 min at 9 km/h, then 20 min at v. He will have run a total of 30 min at 12 km/h.
Therefore:
(30 min) (12 km/h) = (10 min) (9 km/h) + (20 min) v
v = 13.5 km/h
Answer:
a) its frequency
Explanation:
The color of visible light depends only on its frequency, not on the amplitude. In fact, the visible light spectrum can be classified into different colors according to the different frequencies:
Violet: 680-790 THz
Blue: 620-680 THz
Cyan: 600-620 THz
Green: 530-600 THz
Yellow: 510-530 THz
Orange: 480-510 THz
Red: 405-480 THz
And the color of the light has nothing to do with the amplitude of the wave. Therefore, the correct answer is
a) its frequency
A tsunami wave is different than a normal wave because it is caused by an sudden displacement in the ocean. a earth quake below the ocean floor, a landslide, or a meteorite impact. normal waves are caused by the wind, weather and tides, unlike tsunamis. the long wavelengths from the impact from a earthquake can make the wave slow down and increase the amount of water + height for the wave, making a larger impact wave, a tsunami
The electric field in the conductor is 1. 96 × 10^-5 V/m
<h3>How to determine the drift velocity</h3>
The formula for drift velocity is expressed as;
Drift velocity = = μE
Where;
- μ is the Electron mobility of the material, copper wire = 40Vs
- E is the electric field
- Drift velocity = 7.84×10⁻⁴ m/s
Substitute the values
Electric field, E = Drift velocity/ electron mobility
E = 7.84×10⁻⁴/ 40
E = 1. 96 × 10^-5 V/m
Thus, the electric field in the conductor is 1. 96 × 10^-5 V/m
Learn more about drift velocity here:
brainly.com/question/25700682
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