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patriot [66]
2 years ago
14

Which of the following is true about the speed of light?

Physics
1 answer:
Kazeer [188]2 years ago
6 0

Answer:

B. In a vacuum, it is a constant value that does not depend on the observer.

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A 4,000-kg car traveling at 20m/s hits a wall with a force of 80,000 N and comes to a stop. What was the impact time?
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Rate of change of momentum = impact force
(m*v-m*u)/t = F
4000*20/t = 80000 (note: v is zero as it stopped)
<span>soo, t = 1 sec</span>
7 0
3 years ago
Help me please........................
stepan [7]

Answer:

Left

Explanation:

3 0
2 years ago
How is refraction different from reflection?
olga_2 [115]
<span>The angle of refraction is not necessarily equal to the angle
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5 0
3 years ago
If the pressure exerted on a 300.0 mL sample of hydrogen gas at constant temperature is increased from 0.500 kPa to 0.750 kPa, w
uranmaximum [27]

Answer:

200 mL

Explanation:

Given that,

Initial volume, V₁ = 300 mL

Initial pressure, P₁ = 0.5 kPa

Final pressure, P₂ = 0.75 kPa

We need to find the final volume of the sample if pressure is increased at constant temperature. It is based on Boyle's law. Its mathematical form is given by :

V\propto \dfrac{1}{P}\\\\P_1V_1=P_2V_2

V₂ is the final volume

V_2=\dfrac{P_1V_1}{P_2}\\\\V_2=\dfrac{300\times 0.5}{0.75}\\\\V_2=200\ mL

So, the final volume of the sample is 200 mL.

5 0
2 years ago
PLEASE HELP ASAP WILL GIVE BRAINLIEST!!!!
nydimaria [60]

Explanation:

Please mark me as the brainliest answer

7 0
2 years ago
Read 2 more answers
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