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bekas [8.4K]
4 years ago
13

Galaxy A is located 200 million light-years from Earth, while galaxy B is located 600 million light-years from Earth. According

to the Hubble law, how does the motion of the two galaxies compare?
A. Galaxies A and B are moving away from Earth at the same rate.
B. Galaxy A is moving away from Earth three times as fast as galaxy B.
C. Galaxy B is moving away from Earth three times as fast as galaxy A.
Physics
1 answer:
Ray Of Light [21]4 years ago
8 0

Answer:

C

Explanation:

I think c is correct due to reason given by you

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a 2.00 kg friction-less block is attached to an ideal spring with force constant 315 N/m.Initially, the spring is neither stretc
Setler [38]

Answer

given,

mass of block, m = 2 Kg

spring constant, k = 315 N/m

speed of the block, v = 12 m/s

a) Amplitude of the motion

   A = v \sqrt{\dfrac{k}{m}}

   A =\dfrac{12}{\sqrt{\dfrac{315}{2}}}

         A = 0.956 m

b) maximum acceleration of the block

    a_{max}= A \dfrac{k}{m}

    a_{max}= 0.956\times \dfrac{315}{2}

    a_{max}= 150.57\ m/s^2

c) maximum Force

  F_{max} = m a_{max}

  F_{max} = 2\times 150.57

  F_{max} = 301.14\ N

5 0
3 years ago
Which of the following devices can be used to measure force?
Novay_Z [31]

Answer:

Explanation:

d.All of the above

7 0
4 years ago
Two Carnot air conditioners, A and B, are removing heat from different rooms. The outside temperature is the same for both rooms
lakkis [162]

Answer:

(a)  333.77 J

(b) 237.85 J

(c) 4763.77 J

(d) 4667.85 J

Explanation:

Temperature of source, TH = 314 K

Temperature of A, Tc = 292 K

Temperature of B, Tc' = 298 K

heat taken out, Qc = 4430 J

Let the heat deposited outside is QH and QH' by A and B respectively.

\frac{Q_H}{Q_c}=\frac{T_H}{T_c}\\\\Q_H = \frac{4430\times314}{292}=4763.77 J

Now

\frac{Q_H'}{Q_c}=\frac{T_H}{T_c'}\\\\Q_H' = \frac{4430\times314}{298}=4667.85 J

(a) Work done for A

W = QH - QC = 4763.77 - 4430 = 333.77 J

(b) Work done for B

W' = QH' - Qc = 4667.85 - 4430 = 237.85 J

(c) QH = 4763.77 J

(d) QH' = 4667.85 J

4 0
3 years ago
Which of these forces help protons and neutrons to stay at the center of the Atom
Tcecarenko [31]
Strong nuclear force
8 0
3 years ago
Un diapasón vibra a 140 [Hz] y la onda emitida por él se propaga con una rapidez de 340 m/s.Considerando lo anterior, se puede a
Gnom [1K]

The question is: A tuning fork vibrates at 140 [Hz] and the wave emitted by it propagates with a speed of 340 m / s. Considering the above, it can be correctly stated that the wavelength of the wave emitted by the tuning fork is

Answer: Wavelength of the wave emitted by the tuning fork is 2.43 m.

Explanation:

Given: Frequency = 140 Hz

Speed = 340 m/s

wavelength = ?

Formula used to calculate the wavelength is as follows.

\lambda = \frac{v}{f}

where,

\lambda = wavelength

v = speed

f = frequency

Substitute the values into above formula.

\lambda = \frac{v}{f}\\= \frac{340 m/s}{140 Hz}  (1 Hz = 1 s^{-1})\\= 2.43 m

Thus, we can conclude that wavelength of the wave emitted by the tuning fork is 2.43 m.

5 0
3 years ago
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