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denis-greek [22]
3 years ago
11

A spaceship leaves a space station and emits a flash of light that travels at a speed of 300,000 km/s. The spaceship starts out

travelling at 1/4 the speed of light, but ends up travelling at 99/100 the speed of light. What does a scientist on the space station measure the speed of the flash to be?
B. (1/4) x 300, 000 km/s

C. (1/100) x 300, 000 km/s

D. 300, 000 km/s
Physics
2 answers:
balandron [24]3 years ago
7 0
The answer is number D
sergij07 [2.7K]3 years ago
3 0

The correct answer between all the choices given is the last choice or letter D, which is 300, 000 km/s. I am hoping that this answer has satisfied your query and it will be able to help you in your endeavor, and if you would like, feel free to ask another question.

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Can someone please help me?
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A row of seats is parallel to a stage at a distance of 90 m from it. At the center and front of the stage is a diffraction horn
Serggg [28]

Answer:

distance between seats = 2*11.10 = 22.20 m

Explanation:

seats row is parallel to a stage with a distance d = 90 m

doorway width = 0.070 m

speaker frequency = 4.00 * 10^4 Hz

Speed of sound = 343 m/s

tone will be heard at

sin \theta = \frac{\lambda}{D}

we know that v =\lambda d

so

sin\theta = \frac{v}{dD}

              = \frac{343}{4.00 * 10^4*0.070}

sin\theta = 0.1225

\theta = 7.036 degree

tan\theta =\frac{x}{d}

[tex]x = d*tan\theta = 90*0.1234 = 11.10 m

distance between seats = 2*11.10 = 22.20 m

7 0
3 years ago
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