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vova2212 [387]
3 years ago
14

A small spaceship with a mass of only 2.6 ✕ 103 kg (including an astronaut) is drifting in outer space with negligible gravitati

onal forces acting on it. If the astronaut turns on a 12 kW laser beam, what speed will the ship attain in 1.0 day because of the momentum carried away by the beam?
Physics
1 answer:
vladimir1956 [14]3 years ago
6 0

Answer:

 v = 2.66 10⁻³ m/s

Explanation:

To work this problem we must use the relationship between the amount of movement and energy for an electromagnetic wave

    p = U / c

They give us the power of the laser, which is the relationship between work and time. Work is the variation of energy, in a laser beam that is an electromagnetic wave. We have its power

   P = W / t

   W = P t

Work is the variation of energy W = U

   p = P t / c

   ½ m v = P t / c

   v = 2 P t / m c

Let's reduce time to SI units

   t = 1.0 day (24 h / 1 day) (3600 s / 1 h) = 86400 s

Let's calculate

   v = 2 12 10³ 86400 / (2.6 10³ 3 10⁸)

   v = 2.66 10⁻³ m / s

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3 years ago
Read 2 more answers
The tension of a guitar string is increased by 40%. By what factor odes the fundamental frequency of vibration change? a. 1.13 b
bogdanovich [222]

Answer:

<h3> b. 1.18</h3>

Explanation:

The fundamental frequency in string is expressed as;

F1 = 1/2L√T/m .... 1

L is the length of the string

T is the tension

m is the mass per unit length

If the tension is increased by 40%, the new tension will be;

T2 = T + 40%T

T2 = T + 0.4T

T2 = 1.4T

The new fundamental frequency will be;

F2 = 1/2L√1.4T/m ..... 2

Divide 1 by 2;

F2/F = (1/2L√1.4T/m)/1/2L√T/m)+

F2/F = √1.4T/m ÷ √T/m

F2/F = √1.4T/√m ×√m/√T

F2/F = √1.4T/√T

F2/F = 1.18√T/√T

F2/F = 1.18

F2 = 1.18F

Hence the fundamental frequency of vibration changes by a factor of 1.18

8 0
3 years ago
in 1859 a hunter brought 24 rabbits from England to Australia and release them to establish a population for sport hunting rabbi
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I would say the rabbits were breeding.
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What are the two most important traits between a whale and a shark?
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Explanation:

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2 years ago
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Answer:

4.25 m/s^{2}

Explanation:

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3 years ago
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