What did astronomers name the planet they discovered?

Answers

Answer 1

Answer:

astronomers named the planet Kepler-186f

Answer 2

Answer:

Astronomers named the planet they discovered Kepler-186f after the Kepler space telescope, which took the first picture of the planet.

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Which is the SI base unit for mass?

A. cg

B. kg

C. g

D. mg

I think its D

Answers

It is kilograms in mass. (B)

Nice try though :)

The answer that I am seeing is that its kg because it means kilograms.

Identify three devices that use Convex lenses. Please help.
(and no it doesn't give any options, it can be any device you can think of that uses a Convex lense)

Answers

Answer:

Explanation:

Convex lens is the lens which is used to converge the rays of light after refraction.

When the rays of light are coming parallel to the principal axis then after refraction they goes from the focus.

It is used as rear view mirror in automobiles. In this case it pelroduces small and erect image of faroff objects.

It is used in spectacles using for hypermetropia.

It is used in microscopes and telescopes.

Our eye also have a convex lens which forms images on retina.

Microscope lenses , glasses for people who can't see faraway as well and microwave lenses which reflect electromagnetic radiation. Oh and curved mirrors.

What is the apparent change in frequency of waves due to the motion of a source? Photoelectric effect Prismatic change Doppler effect Wavelength variability

Answers

Answer: Doppler effect

Explanation:

The Doppler effect refers to the change in a wave perceived frequency when the emitter of the waves, and the receiver (or observer in the case of light) move relative to each other.

In other words, it is the variation of the frequency of a wave due to the relative movement of the source of the wave with respect to its receiver.

Another important aspect is that the effect occurs in all waves (including light and sound). However, it is more noticeable to humans with sound waves.

The Doppler effect is the apparent change in frequency of waves due to the motion of a source.

4. In the Exploration, the sled does not move at all when two equal forces are appliedopposing directions. Explain the reason behind this.

Answers

Answer:

The net force is zero, so the acceleration is zero

Explanation:

Newton's second law states that the acceleration of an object is proportional to the net force applied to it, according to the equation:

$\sum F = ma$ (1)

where

$\sum F$ is the net force on the object

m is the mass of the object

a is its acceleration

In this problem, we have a sled acted upon two forces, $F_1, F_2$ . So the net force on the sled is

$\sum F = F_1 + F_2$ (2)

however, we are told that the two forces are equal in magnitude but in opposite directions, so

$F_1 = F\nF_2 = -F$

So, eq.(2) becomes

$\sum F = F+(-F) = 0$

and so eq.(1) becomes

$\sum F = ma = 0$

which means

$a=0$

so the acceleration of the sled is zero, and if the sled was at rest, it will not move.

The speed of a pendulum is greatest

Answers

The speed of the pendulum is greatest at the midpoint of the pendulum marked 3.

What is a pendulum?

A pendulum is an device that can be used to demonstrate oscillation. We know that in pendulum the potential energy is maximum at the ends of the pendulum.

Thus, the speed of the pendulum is greatest at the midpoint of the pendulum marked 3.

Learn more about pendulum:brainly.com/question/14759840?

#SPJ9

Answer:

The speed of the pendulum is at maximum at x=0

Which is an example of a decomposer a hawk a mouse a flower or a mushroom

Answers

A mushroom is a decomposer

A mushroom definetly

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