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m_a_m_a [10]
3 years ago
13

As a main sequence star exhausts hydrogen in its core, its surface becomes ___ and its energy output per second (luminosity) bec

omes ____.
Physics
1 answer:
Lilit [14]3 years ago
8 0

Answer:

b

Explanation:

bc

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dos contenedores de objetos tienen 30 y 40 kg de masa respectivamente y están sobre una superficie horizontal sin rozamiento una
Dmitry_Shevchenko [17]

Answer:

The acceleration of each mass is the same, and approximately equal to 1.43\,\,\frac{m}{s^2}

Explanation:

Notice that the mass of the whole system is: 30 kg + 40 kg = 70 kg

If we use a net force of 100 N on the combined system, we can find the acceleration imparted to the masses via Newton's second law:

F_{net}= M\,*\,a\\100\,\,N = 70\,\,kg * a\\a = \frac{100}{70} \,\frac{m}{s^2} \\a\approx 1.43\,\frac{m}{s^2}

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A particle is accelerated uniformly from rest, so that after 10 seconds it has achieved a speed of 15 m/s. Find its acceleration
beks73 [17]

Answer:

1.5 m/s²

Explanation:

Applying,

a = (v-u)/t ...................... Equation 1

Where a = acceleration of the particle, v =  final velocity of the particle, u = Initial velocity of the particle, t = time.

From the question,

Given: u = 0 m/s (From rest), v = 15 m/s, t = 10 seconds

Substitute these values into equation 1

a = (15-0)/10

a = 15/10

a = 1.5 m/s²

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3 years ago
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