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2 years ago

What is magnetism? explaination

Physics

2 answers:

suter [353]2 years ago

6 0

Answer:

Magnetism is the force exerted by magnets when they attract or repel each other.

gladu [14]2 years ago

5 0

Answer:

Magnetic fields are produced by pivoting electric charges, as per Hyper Physics. Electrons all have a property of angular momentum, or turn.

Explanation:

Hope this helps

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Which of the following is an example of a properly written testable hypothesis? *

sveta [45]

Answer:

D. if it is dark, then an owl will find a mouse by the sound the mouse makes

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3 years ago

In a simple machine, the energy input is 120 J. If the efficiency of the machine is 80%, calculate the energy output

pashok25 [27]

Answer:

<h2>96 Joules</h2>

Explanation:

We know that efficiency is the ratio of output power by input power. i.e. Efficiency describes the quality of machine or system how good it is.

Solution,

Energy input of system = 120 J

Efficiency = 80% = $\frac{80}{100} = 0.8$

Now,

According to definition,

Efficiency = $\frac{output}{input}$

Cross multiplication:

$output \: = \: 0.8 \times 120$

Calculate the product

$output \: = 96 \: joules$

Hope this helps...

Good luck on your assignment...

4 0

3 years ago

What three variable factors determine the force of gravity between any two objects?

brilliants [131]

The force of gravity between two objects is:
F = G*m1*m2/r^2

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3 years ago

A lawnmower engine running for 20 minutes does 4560000 j of work. What is the power output of the engine

Alenkasestr [34]

<em>Answer: </em>

tim e (t) = 20 min.

= 20 × 60 = 1200 s ,

Work ( W) = 4560000 J

= 4560 KJ ,

Determine:

Power output (P) = Work ÷ time

= 4560 ÷ 1200

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3 years ago

A book sitting on a shelf has gravitational potential energy. true or false

Darya [45]

Answer:

False

Explanation:

A book resting on a shelf has no potential energy relative to the shelf, since it has height of zero meters relative to the shelf.

8 0

3 years ago

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What is magnetism? explaination​

What is magnetism? explaination