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307 Physics - STUDY HELP FOR FINAL- QUESTIONS WITH 100% CORRECT ANSWERS

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307 physics
307 physics study help for final
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307 Physics - STUDY HELP FOR FINAL- QUESTIONS WITH 100% CORRECT ANSWERS

(UNIT M, Ext A) -

Below is an image of a bar magnet, with its Poles indicated. Imagine a compass were placed at position X
and then at position Y. Which direction would the North Pole of the compass point at each position?
(Yes, you MUST watch/do the Extension first or you may "guess" wrong!)

Select one:

a.

The North Pole of the compass (red tip) would point to the right at position X and to the right at position
Y.

b.

The North Pole of the compass (red tip) would point to the right at position X and to the left at position
Y.

c.

The North Pole of the compass (red tip) would point to the left at position X and to the right at position
Y.

d.

The North Pole of the compass (red tip) would point to the left at position X and to the left at position Y.
- ANS-✔✔Week 1, Wednesday

The correct answer is: The North Pole of the compass (red tip) would point to the right at position X and
to the right at position Y.

(UNIT M, Ext A) -

When standing in my home in California, if the red portion of my compass needle points south (toward
Mexico) that means:

a.

,The compass is working correctly. The polarity has not flipped.

b.

The compass has flipped polarity. The red portion should be pointing north (toward Canada).

c.

All compasses are different so there is not enough information given. - ANS-✔✔Week 1, Wednesday

The correct answer is: The compass has flipped polarity. The red portion should be pointing north
(toward Canada).

(UNIT M, Ext A) -

Below are images of three positions of a compass near a bar magnet. The pointed end of the compass
needle represents its North Pole. Only one of these three images shows the best approximation of the
orientation of the compass needle, the other two are incorrect. Which image is correct?

Select one:

a.

Image A

b.

Image B

c.

Image C - ANS-✔✔Week 1, Wednesday

The correct answer is: Image B

(UNIT M, Ext A) -

Which of the following statements best explains why the North Pole of a compass needle points
(approximately) toward the geographic North Pole of the Earth?

,Select one:

a.

The North Pole of the imaginary large bar magnet inside the Earth lies close to the geographic North
Pole. (Magnetic north is geographic north.)

b.

The South Pole of the imaginary large bar magnet inside the Earth lies close to the geographic North
Pole. (Magnetic south is geographic north.) - ANS-✔✔Week 1, Wednesday

The correct answer is:

The South Pole of the imaginary large bar magnet inside the Earth lies close to the geographic North
Pole. (Magnetic south is geographic north.)

(UNIT M, Ext A) -

What kinds of materials are attracted to a magnet/can be magnetized? (Only magnetized items will
cause a compass to react.)

a. All materials- both metals and non-metals

b. Only metals, not non-metals

c. Only certain metals, not all metals. Not non-metals.

d. Only non-metals, not metals.

e. Certain metals and certain non-metals but not all of them. - ANS-✔✔Week 1, Wednesday

The correct answer is: Only certain metals, not all metals. Not non-metals.

UNIT M, Ext B -

, The Magnetism unit lessons and extensions rely heavily on modeling. Modeling can be very useful.
When using models I MUST remember:

(Choose all that apply)

a. Models should be reevaluated and possibly updated when new information/data is gathered.

b. Models can never change once they have been established.

c. A model must be able to explain all of the observations that have been made so far.

d. The model may be able to explain all of the observations/data but still not show what is actually
occurring.

e. None of the above - ANS-✔✔Week 2, Monday

The correct answers are: Models should be reevaluated and possibly updated when new
information/data is gathered., A model must be able to explain all of the observations that have been
made so far., The model may be able to explain all of the observations/data but still not show what is
actually occurring.

UNIT M, Ext B -

Consider the model from a different group, similar to but not the same as Group 2's model from the
extension activity:

Description: There are no magnetic entities associated with the unmagnetized nail, but when a magnet
is rubbed along the surface of the nail, it deposits small N and S entities (like dust particles) loosely along
the surface, as shown. (The - represents S)

BASED ON THIS MODEL, Which of the following observations made by some other groups could NOT be
explained/justified using this model? (Choose all that apply.)

Select one or more:

a. The magnetized nail behaves like a two-ended (bar) magnet.

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