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miskamm [114]
3 years ago
5

When stars move away from a telescope, what color do they appear to be compared to the actual light they

Physics
1 answer:
Pavel [41]3 years ago
6 0

Answer:

If a star is moving toward Earth, its light waves appear to be squeezed together. The decreasing distance between Earth and the star effectively shortens the wavelength of the starlight received by Earth. This shifts the star's spectral lines toward the blue end of the spectrum.

Explanation:

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An object is placed 12.5 cm from a lens of focal length 22.0 cm. What is the image distance?
Tanzania [10]

Answer:11.5

Explanation:

6 0
4 years ago
Please help i need this by today
makkiz [27]

Answer:

the answer is D

Explanation:

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3 0
3 years ago
In the amusement park ride known as Magic Mountain Superman, powerful magnets accelerate a car and its riders from rest to 43.4
Anton [14]

Answer:

Average net force, F = 15157.15 N

Explanation:

It is given that,

The mass of the car and riders is, m=3\times 10^3\ kg

Initial speed of the car, u = 0

Final speed of the car, v = 43.4 m/s

Time, t = 8.59 seconds

We need to find the  average net force exerted on the car and riders by the magnets. It can be calculated using second law of motion as :

F = m a

F=m(\dfrac{v-u}{t})

F=3\times 10^3\ kg\times (\dfrac{43.4\ m/s-0}{8.59\ s})

F = 15157.15 N

So, the average net force exerted on the car and riders by the magnets. Hence, this is the required solution.

5 0
3 years ago
"if a 20 and a 40 ohm resistor are wired in parallel to a 20v source, what will be the current in the 40 ohm resistor?"
choli [55]

In parallel, neither resistor knows about the other one, and they have no effect on each other.

Each resistor is connected straight to the battery terminals. If the battery is hefty enough, it supplies current to each resistor as if the other one weren't there.

Current through a resistor = (voltage across it) / (its resistance).

Current = (20 V) / (40 ohms)

Current = 1/2 Ampere.

4 0
3 years ago
The diagram below shows a light ray striking Medium A and Medium B at the same angle.
zepelin [54]

Answer: D  Medium B is denser than Medium A because light bends more in Medium B.

Explanation: The more the light bends the less energy it has

6 0
3 years ago
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