SOMEONE HELP!!!!!!!test due in 30 min i need help answer as many as you can and put the number next to the one you answer !!!!!!!PLEASE!!!!!!!!!

Which of the following items have the WEAKEST gravitational force?
(3 Points)

A pencil and a book that are 10 cm apart

A pencil and a book that are 20 cm apart

A bowling ball and a book that are 10 cm apart

A bowling ball and a book that are 20 cm apart
2 In this system which way does the electricity flow?
(5 Points)

From the battery to the light bulb.

From the negative end of the battery to the positive end of the battery.

From the lightbulb to the battery.

From the positive end of the battery to the negative end of the battery.
319. An electric current produces a(an)
(4 Points)

magnetic field.

conductor.

solenoid.

insulator.
4You make your bed with the warm sheets you just pulled out of the dryer. Once you turn your light off and get into bed you notice tiny sparks in your sheets when climbing into bed. What could be causing this?
(4 Points)

When your sheets were in the dryer, they became charged with static electricity due to friction and now they are discharging causing the sparks.

The sheets are giving off electrons because you are positively charged.

When your sheets were in the dryer they became neutrally charged due to conduction.

D. The sheets got very warm in the dryer and now are sparking due to the heat they conducted.
5Which sets of magnets(s) below are attracted to each other?
(4 Points)


Y and Z

Only Y

X and Z

Only Z
6A temporary magnet _______________________
(4 Points)

keeps its magnetism for a long time.

easily loses its magnetism.

cannot be destroyed.

has two north poles.
7The diagram shows the magnetic field lines between two magnetic poles, A and B. Which statement correctly describes the polarity of magnetic poles A and B?
(5 Points)


A is a north and B is a south pole

A is a south pole and B is a north pole

Both A and B are north poles

Both A and B are south poles
8Which pair of magnets is arranged so that opposite poles are placed near each other?
(3 Points)

only B

only C

both B & C

You cannot tell from the picture.
9Which of the following are examples of static electricity?
(2 Points)

Lightning

Laundry sticking together coming out of the dryer

Shocking your finger on the doorknob

All of these
10Which of the following descriptions describe objects that are good conductors of heat and electricity?
I. metallic
II. allows heat and electricity to flow easily through it
III. repels a magnet
IV. does NOT allow electricity to flow through
V. particles are evenly distributed through the object
VI. restricts the flow of heat and electricity
VII. particles are unevenly distributed
(4 Points)

III, IV, VI, & VII

I, II, & V

none of these describe conductors

I, II, V, & VII
11A generator transforms __________________________________
(4 Points)

potential energy into kinetic energy.

magnetic energy into electrical energy.

mechanical energy into electrical energy.

friction into electrical energy.
12Which of the following descriptions are benefits of using an electromagnet instead of a permanent magnet are:
I. their strength can vary
II. they can be turned on and off
III. they work on metallic and non metallic objects
(5 Points)

I only

II only

III only

I & II

I & III

all of them