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Zolol [24]
3 years ago
14

The closest star to our solar system is Alpha Centauri, which is 4.12 × 10^16 m away. How long would it take light from Alpha Ce

ntauri to reach our solar system if the speed of light is 3.00 × 10^8 m/s? (Provide an answer in both seconds and in years.)
(According to the textbook the answer is 4.35 years, i'm just not sure how to get there as I keep getting a different answer)
Physics
1 answer:
bonufazy [111]3 years ago
4 0

Time = (distance) / (speed)

Time = (4.12x10^16 m) / (3 x10^8 m/s)

Time = 1.37 x 10^8 seconds

Divide the seconds by 86,400 to get days. Then divide the days by 365 to get years.

Time = about 4.35 years

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Pls help
goldenfox [79]

Chemical Energy                                                                  

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3 0
3 years ago
How can the achievement of lifting a rocket off the ground and into space be explained
KengaRu [80]
It would be newtons third law. That is because the third law states<span> that for every action (force applied) there is an equal and opposite reaction (resulting force) that will occur.</span>
3 0
4 years ago
A solid sphere rolls along a horizontal, smooth surface at a constant linear speed without slipping. What is the ratio between t
dsp73

Answer:

option E

Explanation:

given,

Rotational Kinetic Energy, KE_r = \dfrac{1}{2}I\omega^2

Moment of inertia of the solid,

I = \dfrac{2}{5}MR^2

\omega = \dfrac{V}{R}

now,

KE_r = \dfrac{1}{2}I\omega^2

KE_r = \dfrac{1}{2}\times \dfrac{2}{5}MR^2 (\dfrac{V}{R})^2

KE_r =\dfrac{1}{5}MV^2......(1)

transnational kinetic energy

KE_t =\dfrac{1}{2}MV^2

Total kinetic energy

KE = \dfrac{1}{2}MV^2 + \dfrac{1}{5} MV^2

KE = \dfrac{7}{10}MV^2

ratio of rotational kinetic energy to the total kinetic energy

\dfrac{KE_r}{KE_t}=\dfrac{\dfrac{1}{5}MV^2}{\dfrac{7}{10}MV^2}

\dfrac{KE_r}{KE_t}=\dfrac{2}{7}

hence, the correct answer is option E

4 0
3 years ago
The weight of a metal bracelet is measured to be 0.100 N in air and 0.092 N when immersed in water. Find its density
max2010maxim [7]
If you subtract the two weights, 0.100 N and 0.092 N, we will get 0.008. So, the density between 0.100 and 0.092 is 0.008. :)

Answer: 0.008

I hope this helped!:)
4 0
3 years ago
The difference between an electric motor and an electric generator is that a motor converts _______ energy into energy _______,
lianna [129]

Answer:

Motor converts Electrical energy into Mechanical Energy, while A generator converts Mechanical energy into Electrical energy. thankyou

Explanation:

3 0
3 years ago
Read 2 more answers
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