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Semenov [28]
4 years ago
5

Two stars have the same radius but have very different temperatures. the red star has a surface temperature of 3,000 k and the b

lue star has a surface temperature of 156,100 k. by what factor is the blue star more luminous compared to the red star
Physics
1 answer:
dangina [55]4 years ago
4 0
I would say that insofar as the two stars temperatures are presumably closely related to their luminosity, that the blue star at 156,100 k compared to 3000k for the red star then the blue star has a luminosity of 52 times that of the red star.
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a sound wave is determined to have a frequency of 1,000 hz and wavelength of 35cm. what is the speed of this wave?
natulia [17]

Answer:

The speed of the sound wave is 350 ms^{-1}

Explanation:

Given

Frequency of sound wave = 1000Hz = 1000s^{-1} (since 1 s^{-1} = 1 Hertz (Hz))

Wavelength of sound wave = 35 cm

Speed of sound wave = ?

All waves have same the relation among frequency, sound and speed which is given by

v=fλ , where

v is the speed

f is frequency

λ is wavelength

Therefore, the speed of sound wave = 1000s^{-1} x 35 cm

                                                              = 35000 cms^{-1}

                                                              = 350 ms^{-1}

Hence the speed of the sound wave is 350 ms^{-1}

3 0
3 years ago
How could Trevor increase the amplitude of the motion
iren [92.7K]

Answer:

d

He could pull the mass down farther.

4 0
4 years ago
In a standing wave, areas of destructive are the?
Alborosie

antinodes

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4 0
3 years ago
Read 2 more answers
A typical ten-pound car wheel has a moment of inertia of about 0.35kg⋅m2. The wheel rotates about the axle at a constant angular
QveST [7]

Answer:

The rotational kinetic energy of the rotating wheel is 529.09 J  

Explanation:

Given;

moment of inertia I = 0.35kg⋅m²

number of revolutions = 35.0

time of revolution, t = 4.00 s

Angular speed (in revolution per second), ω = 35/4 = 8.75 rev/s

Angular speed (in radian per second), ω = 8.75 rev/s x 2π = 54.985 rad/s

Rotational kinetic energy, K = ¹/₂Iω²

Rotational kinetic energy, K = ¹/₂ x 0.35 x (54.985)²

Rotational kinetic energy, K = 529.09 J  

Therefore, the rotational kinetic energy of the rotating wheel is 529.09 J  

7 0
3 years ago
Which of the following statements is true for ideal gases, but is not always true for real gases?
xxMikexx [17]

Answer:

C. Replacing one gas by another under the same conditions, has no effect on pressure.

Explanation:

Ideal gas:

 A gas is treated as an ideal gas if temperature is high and pressure is low.

Kinetic energy for ideal gas given as

K.E.=\dfrac{3}{2}KT

So when temperature of gas is increases then  Average molecular kinetic energy will also increases.

The size of molecule is negligible as compare to the dimension of container. It mean that volume occupied by molecule is less as compare to the volume of container.

The between molecules is perfectly elastic.

Ideal gas equation

P V = m R T

So the option C is not always true.

4 0
3 years ago
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