3 years ago

Which of the following has the greatest mass? A. star B. moon C. planet D.galaxy

Physics

1 answer:

Rashid [163]3 years ago

3 0

Answer: I think the answer is d

Explanation: sry if wrong

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If you double the pressure on the surface of a can of water, the buoyant force on a stone placed in that water will

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3 years ago

Suppose astronomers discover a radio message from a civilization whose planet orbits a star 35 light-years away. Their message e

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Answer:

The duration is $T =72 \ years /tex]Explanation:From the question we are told that The distance is [tex]D = 35 \ light-years = 35 * 9.46 *10^{15} = 3.311 *10^{17} \ m$

Generally the time it would take for the message to get the the other civilization is mathematically represented as

$t = \frac{D}{c}$

Here c is the speed of light with the value $c = 3.08 *10^{8} \ m/s$

=> $t = \frac{3.311 *10^{17} }{3.08 *10^{8}}$

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converting to years

$t = 1.075 *10^9 * 3.17 *10^{-8}$

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Now the total time taken is mathematically represented as

$T = 2* t + 2 + 2$

=> $T = 2* 34 + 2 + 2$

=> [tex]T =72 \ years /tex]

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3 years ago

What is alpha, beta and gamma radiation made of

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Answer:

Alpha radiation is the name for the emission of an alpha particle in fact an helium nuclei, beta radiation is the emission of electrons or positrons , and gamma radiation is the term used for the emission of energetic photons.

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10 months ago

According to Kepler, what do all bodies in orbit around another have in common?

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D.
All follow an elliptical path that has two foci, rather than a circular path.

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3 years ago

Which material would you take, steel or bricks to design a bridge? Why?

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Answer:

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2 years ago

Read 2 more answers