PHYSICS HIGH SCHOOL

Solids are usually more dense than: gases liquids plasmas all of the above

Answers

Answer 1
Answer: Yes, this is because particles in a solid there are more particles which are touching. They can only vibrate. But particles in a gas are far apart. This is the same for liquids to.

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Which of the following is an example of a measurement of velocity?A. 1 m. B. 1 m/s. C. 1 m/s². D. 1 m/s north.
A golf ball is dropped from rest from a height of 9.5m.  It hits the pavement then bounces back up rising  just 5.7 m before falling back down again.  A boy then catches the ball on the way down when it is 1.20 m above the pavement.  Ignoring air resistance, calculate the total amount of time the ball is in the air, from drop to catch.

Once you have carried out your experiment and have some results, you shouldA. make a new hypothesis that fits your results
B. keep your results only if they support your hypothesis
C. design a new experiment to test your results
D. analyze your results and draw a conclusion

Answers

Answer:

I think the answer is D

Explanation:

not sure

but if its correct can i get brainliest??

An electromagnet is a device in which moving electric charges (current) in a coil of wire create a magnet. What’s one advantage of using electromagnets in devices? A Electromagnets have a strong, constant magnetic field. B Electromagnets are more powerful than permanent magnets. C Electromagnets don’t need a source of electricity to work. D Electromagnets can easily be turned on and off.

Answers

The electromagnet can be adjusted for having different levels of magnetic fields by turning it on and off. Hence, option (D) is correct.

What is an Electromagnet?

Electromagnets are made by winding a wire through a magnetic material such as a soft iron core making a coil and then passing an electric current through the coil thus making the soft iron core magnetic.

The characteristics of electromagnets are as follows -

  • The strength of the electromagnet depends on the number of coils and also the size of the electric current through the coil.
  • Permanent or regular magnets on the other hand do not require power but depend on the type of material used to make it.
  • It is advantageous to use electromagnets as compared to using permanent magnets since the strength of the electromagnet can be easily adjusted by regulating the amount of current flowing through the coils.

Thus, we can conclude that the electromagnet can be adjusted for having different levels of magnetic fields by turning it on and off. Hence, option (D) is correct.

Learn more about the Electromagnets here:

brainly.com/question/13803241

Answer;

D Electromagnets can easily be turned on and off.

Explanation;

  • Electromagnets are made by winding a wire through a magnetic material such as soft iron core making a coil, and then passing electric current through the coil thus making the soft iron core magnetic.
  • The strength of the electromagnet depends on the number of coils and also the size of the electric current through the coil.
  • Permanent or regular magnets on the other hand do not require power but depends on the type of material used to make it.
  • Therefore, its advantageous to use electromagnets as compared to using permanent magnets since the strength of the electromagnet can be easily adjusted by regulating the amount of current flowing through the coils. Thus, the electromagnet can be adjusted for have different levels of magnetic fields.

A neutral metal comb is held near an object with a negative charge.What happens to the comb?

A. The comb is charged by contact.

B. The comb is charged by friction.

C. The comb is charged by static discharge.

D. The comb is charged by induction.

Answers

D. The comb is charged by induction.

What are minerals made of a single element called?

Answers

Minerals of a single element are called Native elements. These include gold, silver, copper, etc. They can be divided into three groups such as metals, semi-metals, and nonmetals. Hope this helped.

The magnetic north pole changes location but the geographic north pole does not true or false

Answers

The North Magnetic Pole is the point on the surface of Earth's Northern Hemisphere at which the planet's magnetic field points vertically downwards (in other words, if a magnetic compass needle is allowed to rotate about a horizontal axis, it will point straight down). There is only one location where this occurs, near (but distinct from) the Geographic North Pole and the Geomagnetic North Pole. So yes true

A magnetic field forms around a moving electric charge, resulting in a magnetic field. Which does this describe?

A.
how electric charges can be used to make current flow

B.
how electric charges can be used to create a magnetic field

C.
how a magnetic field can be used to generate an electric current

D.
how a magnetic field can be used to generate electrons

Answers

B.
how electric charges can be used to create a magnetic field 
(how I know, just took it, the test I mean)
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