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Romashka [77]
3 years ago
8

Astronomers classify stars according to their (1 point) distance from Earth. color, size, and absolute brightness. age and paral

lax. all of the above
Physics
1 answer:
charle [14.2K]3 years ago
8 0

Answer:

All of the above

Explanation:

Astronomers use all of those measures to classify stars. If you want to look more into classifying stars, check out the Hertzsprung-Russel Diagram. It covers how to identify red giants, main sequence, dwarf stars, ect. Distance from earth is typically measured in light years. The color of stars generally determines how hot they are. (Blue stars are the hottest) Also, the parallax method is used to measure stars that are closer to earth. This method relies heavily on geometry though.

Hope this helped!

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The interaction between two optical and perceptual phenomena makes moving pictures possible. the persistence of vision provides
Marina86 [1]
It seems that you have missed the necessary options for us to answer this question, but anyway here are the answers. The interaction between two optical and perceptual phenomena makes moving pictures possible. the persistence of vision provides the illusion of SUCCESSION <span>while the phi phenomenon provides the illusion of MOVEMENT. Hope this helps.</span>
8 0
4 years ago
A 2 kg car accelerated from 10 m's to 20 m/s using a force of 3000N. How quickly did it
elena-14-01-66 [18.8K]

Answer:

the car accelerates in

\frac{1}{150}  \: or \: 0.006 \: second

Explanation:

here's the solution : -

we know,

=》

force = mass   \times acceleration

=》

acceleration =  \frac{force}{mass}

=》

a  =  \frac{3000}{2}

=》

a = 1500

so, acceleration = 1500 m/s^2

now,

=》

a =  \frac{v - u}{t}

here, a = acceleration, v = final velocity,

u = initial velocity, t = time taken.

So,

=》

1500 =  \frac{20 - 10}{t}

=》

1500 =  \frac{10}{t}

=》

t =  \frac{10}{1500}

=》

t = 0.006 \: sec

7 0
3 years ago
Gibbons move through the trees by swinging from successive handholds, as we have seen. To increase their speed, gibbons may brin
Sedbober [7]

By bring their legs close to their bodies, they are decreasing the length of the pendulum which help them move more quickly.

A pendulum is nothing but a body suspended from a fixed point so that it can swing back and forth under the influence of gravity.

Here in this case Gibbons are bringing their legs close to their bodies and reducing the length of the pendulum. Since as the length of the pendulum increases the speed of the movement will be reduced. By bringing their legs close to their bodies they are reducing the length and in turn their speed increase and they move quickly.

To learn more about pendulum, visit here

brainly.com/question/14759840

#SPJ4

5 0
2 years ago
Remote controls enable users to adjust the volume and channel of televisions without having to touch the television. Which of th
Grace [21]

Answer:

When you use your control remote, you can see that there is not a "material" thing that comes out of the control remote and goes to the TV, but there is actually energy that comes from the control remote (and this is why your control remote needs battery)

This energy is called an "electromagnetic wave" usually in the infrared range, this means that the energy that comes from the control remote has less energy than the visible red light (and this is why we can not see the light that comes out of the control remote), and this "signal" is read by the TV, in order to change of channel or change the volume.

You even can see that there is a sort of light (electromagnetic wave) coming out from it if you point with a camera to the small bulb that is in the front of the control remote.

3 0
3 years ago
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Bernie is driving down a highway at 28m/s. When bernie approaches a stop light, he presses on his brakes to bring his car to a s
coldgirl [10]

Answer:

Explanation:B

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