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# Physics

Arnulfo Macejkovic

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2021-10-26 18:33:30
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Cards in this guide (23)
The Quantum Number that defines the probable distance an electron is from the nucleus is the quantum number

principal

What is the resistance in ohms of the computer-monitor combination when a desktop computer and monitor together draw about 1.2 A of current and they plug into a wall outlet that is 120 V

60

Which of these properties does the Quantum Mechanical Model of the atom describe

The Quantum Mechanical Model describes the most probable location of a electron.

An atom that has single electrons in its outermost shell

paramagnetic

Why does the frequency of a siren get higher as an ambulance using that siren gets closer

because you get closer to the sound

As the ambulance gets closer, the sound waves are compressed relative to the person; so the frequency increases.

A quantum of energy as defined in the Quantum Mechanical Model is a

exact, whole number amount of energy needed to move an electron to a higher energy level

What is the method of charging by rubbing two objects together

friction charging

The Quantum Number that defines the shape of space an electron most likely resides in is the quantum number

The quantum number that indicactes the shape of an orbital in called the angular momentum quantum number.

Do electric and magnetic fields always form closed loops

Magnetic fields do, because there's no such thing as an isolated magnetic "pole",

and a magnetic line always starts and ends at opposite poles of the same

magnetized object.

But electric fields don't. You can easily have a bundle of isolated positive charge

over here and a bundle of isolated negative charge over there, whereupon the

lines of the electric field start on one bundle and end on the other bundle.

But electric field lines can also exist in closed loops, and they do that in radio waves, where the electromagnetic field propagates with an electric field component and a magnetic field component, and they both form closed loops.

An electric clothes dryer draws 22 A of current from a 240-V wall outlet How much power in watts does it use

Power (Watts) = Current (Amps) * Voltage

Power = 22Amps * 240 Volts

Power = 5,280 Watts

5280

Increase the strength of a copper electromagnet

There are a couple of ways to increase the strength of a copper electromagnet. You could increase the current going through the wire or wrap more wire around it which increases the strength exponentially. You could also put in a soft iron core such as a nail which in essence becomes a magnet and increases the strength of the magnet.

Select the correct orbital diagram for this element

To be able to answer this question the element will have to be known. Without knowing what the element is there is no way to know what the diagram is.

Why are all metals attracted by magnet

All metals are not attracted by a magnet. Most metals are not attracted by a magnet. It is iron and steel which is made from iron that are attracted by a magnet.

Most other metals such a copper, aluminum, zinc, brass, nickel etc. are not attracted to a magnet...

Which of the following is true about the force between charges

Like charges repel each others.

The force between charges decreases as the distance between them increases.

In a closed circuit what does an increase in voltage cause

an increase in current, hence increased power and increased heat.

An atom that is only weakly affected by a magnetic field

diamagnetic

What type of fields are created by an arrangement of electric charges or a current

Magnetic fields can be created by charges or the flow of current.

What are two kinds of fields that's make up an electromagnetic waves

Electric and Magnetic

Which of the following correctly describe magnetic fields lines

None of them does.

Where would shock from an electrified fence be the least unpleasant if standing A barefoot on wet grass during rain B on a rubber mat or very dry ground C on a metal ladder against the fence

You would need to be standing on some kind of electrical insulator, such as a rubber mat, or on very dry ground.

What happens to the strength of an electromagnet as you increase the number of coils

The energy of electromagnet will increase

In terms of the scientific definition of work magnetic fields can do work but electric fields cannot true or false

false

Use the electronegativity chart to determine the type of bond that will form between this pair of elements.

Use the electronegativity chart to determine the type of bond that will form between this pair of elements.

N + N

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