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3 years ago

The red shift of visible light waves that is observed by astronomers on Earth is used to determine the

1 answer:

3 0

This actually means that the object which is emitting light spectrum is moving away from us.. how do you know that ? well.. it is clearly mentioned that it is a red shift so the wavelengths will stretched more . and thus the spectrum turns more reddish as it has higher wavelengths .. hence so called red shifts

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How dose silicon shape our technological reality?

vichka [17]

Silicon is used in the manufacturing of microchips and is also used in motherboards. We use it in our daily lives. It is a high tech element.

3 0

3 years ago

In the opposite figure, the work done by the force F to push the box upwards from the ground to the top of the inclined plane is

goldfiish [28.3K]

In the opposite figure, the work done by the force F to push the box upwards from the ground to the top of the inclined plane is 600 J.Option c is correct.

Work done is defined as the product of applied force and the distance through which the body is displaced on which the force is applied.

The displacement value from the triangle is;

$\rm sin 30^0 = \frac{P}{H} \\\\ H=S =\frac{3 \ m}{sin 30^0} \\\\ S = 6\ m$

The work done is found as ;

$\rm W= Fd \\\\ W = 100 \ N \times 6 \\\\ W= 600 \ J$

The force F in the opposing figure does 600 J of effort to lift the box from the ground to the top of the inclined plane.

Hence option c is correct.

To learn more about the work done refer to the link;

brainly.com/question/3902440

#SPJ1

4 0

2 years ago

Which of the following statements are true? Check all that apply. A.Earth's geographic south pole is also a magnetic south pole.

ycow [4]

Answer:

C.The north pole of a bar magnet will attract the south pole of another bar magnet.

D.The south poles of two bar magnets will repel each other.

F.Earth's geographic north pole is actually a magnetic south pole.

Explanation:

The magnetic field is a region of space that exerts a force on charged particles in motion or on magnets.

A magnet is an object that produces a magnetic field in the region around it - a magnet always consists of a north pole and of a south pole; it is not possible to create a magnetic monopole: if a magnet is cut in a half, we end up with two new magnets, each of them having its own north and south pole.

The lines showing the direction of the magnetic field always go from the north pole towards the south pole.

When a magnet is placed near another magnet, the two magnets can attract/repel each other. In particular:

- Same poles (north-north and south-south) repel each other

- Opposite poles (north-south) attract each other

Moreover, the Earth has also a magnetic field, and its axis acts as a huge magnet. The location of the magnetic North pole corresponds to the location of the geographic South pole, and vice-versa.

According to what we said so far, the correct statements are:

C.The north pole of a bar magnet will attract the south pole of another bar magnet.

D.The south poles of two bar magnets will repel each other.

F.Earth's geographic north pole is actually a magnetic south pole.

4 0

4 years ago

What process allows radios to receive signals even when they are not in line of a tower?

Inessa05 [86]

The answer is A. Refraction

Refraction is a change in direction of propagation of a wave due to a change in its transmission medium, by maintaining its frequency while changing the wave velocity at the same time will allows radios to receieve signals even though when they're not in line

3 0

3 years ago

3. A 65 kg runner exerts a force of 59N. What is the acceleration of the<br> runner?

Mandarinka [93]

Answer:

Explanation:

The acceleration of an object given it's mass and the force acting on it can be found by using the formula

$a = \frac{f}{m} \\$

f is the force

m is the mass

From the question we have

$a = \frac{65}{59} \\ = 1.101694...$

We have the final answer as

Hope this helps you

7 0

3 years ago