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madam [21]
3 years ago
5

1. If some unimaginable calamity destroyed the Sun, using the astronomical unit for the Earth-Sun distance and the value for the

speed of light above, how long would we still have light after the Sun ceased to exist? (5)
Physics
1 answer:
Vsevolod [243]3 years ago
8 0

Answer:

8 minutes and 20 seconds

Explanation:

Average Distance between Earth and Sun: 150 million km   = 1.5 * 10^{8} km

Velocity of light: 3 * 10^{8} \ m/s   =   3 * 10^{5} \ km/s

Time = Distance/Speed

or Time = 1.5 * 10^{8} \ km / 3 * 10^{5} \ km/s

= 5 * 100

= 500 seconds

⇒ Time = 8 minutes and 20 seconds

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Brut [27]

Answer:

0.5m/s2

Explanation:

acceleration= change in velocity/time taken

= v - u/ t

= 10-5/10

=5/10

= 0.5m/s2

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A girl travels 20 miles on her bike, the trip takes two hours. express her speed in miles/hr
xxTIMURxx [149]

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10 mph

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Which of the following is not an example of osmosis? Multiple Choice
NNADVOKAT [17]

Answer:

Sugar in coffee dissolves.

Explanation:

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Explanation:

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Specific heats capacity of water(c) = 4.186j/g°C

Q = mcDt

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Q = 12g × 4.186j/g°C × - 9°C

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7 0
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The idea that large fibers in the sensory nerves can prevent impulses from reaching the brain and thus prevent the sensation of
allochka39001 [22]

Answer:

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