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3 years ago

Which process causes Earth to act like a magnet?

Physics

2 answers:

Katyanochek1 [597]3 years ago

8 0

Answer:movement of iron in core

Explanatio

sweet [91]3 years ago

7 0

A - the hot liquid metal in the outer core of Earth creates electric currents

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A rock is stuck deep in the dirt. When you pull on the rock to remove it, what type of force are you exerting?

aleksandrvk [35]

It is Tension as the other 3 answer choices would not make sense. Compression would mean you are pressing the rock on both sides or in this case, pushing it into the dirt. It can't be nuclear force as you are pulling out a rock. Air resistance would not make sense either as there is no air involved in the scenario at all.

4 0

4 years ago

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An unfortunate astronaut loses his grip during a spacewalk and finds himself floating away from the space station, carrying only

vlabodo [156]

Answer:

15.8m/s

Explanation:

This problem can be solved by taking into account the conservation of the momentum. In this case the momentum of the astronaut and the bag of tools must equal the momentum of the astronaut and the bag of tool after the astronaut throws the bag.

Hence, we have

$p_{before}=p_{after}\\(m_{a}+m_{b})v=m_{a}v_{a}+m_{b}v_{b}$

where ma and va are the mass and velocity of the astronaut, mb and vb are the mass and velocity of the bag, after the astronaut throw the bag. The velocity v is the velocity where the astronaut has the bag of tool

By taking into account that the velocity of the astronaut must be zero to keep him near of the space station, we have that vb = 0.

Thus

$(124 + 19.0)2.10=19.0v_{b}\\v_{b}=\frac{300.3}{19.0}=15.8m/s$

8 0

4 years ago

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Objects 1 and 2 attract each other with a electrostatic force

daser333 [38]

Electrostatic force changes like the inverse square of the distance (just like gravity).

If you double the distance, you change the force to 1/4 of what it used to be.

After the move, Objects 1 and 2 attract each other with a force of (18/16) = 1.125 units .

6 0

3 years ago

Read 2 more answers

Explain what happens when a massive star ends its life as a supernova.

Step2247 [10]

Bang.

<span>No seriously, that is what will happen. The constant exchange between pressure and gravity will result in a supernova explosion when the star will literally implode and then explode, shedding all the remaining gasses into outer space. </span>

<span>What will be left, will depend on the original mass, either a neutron star or a black hole. </span>

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4 years ago

A 0.180 kg ball falls 2.5 m. How much work does the force of gravity do on the ball?

kifflom [539]

The amount of work done by the force of gravity on the ball is 4.41 Joules.

<u>Given the following data:</u>

Mass of ball = 0.180 kg.

Displacement = 2.5 meters.

<u>Scientific data:</u>

Acceleration due to gravity = 9.8 $m/s^2$ .

To calculate the amount of work done by the force of gravity on the ball:

<h3>How to calculate work done.</h3>

In Science, work done is calculated by multiplying force and the height or displacement experienced by an object.

Mathematically, work done is given by the formula:

$Work\;done = force \times displacement = mgh$

Substituting the given parameters into the formula, we have;

$Work\;done = 0.180 \times 9.8 \times 2.5$

Work done = 4.41 Joules.

Read more on work done here: brainly.com/question/22599382

6 0

3 years ago