Physics, 25.09.2019 07:20 koboshy23

An iron nail does not pick up paper clips as a magnet would.
what can be concluded about the structure of the iron nail?
a. it has no domains.
b. it has domains that are not aligned.
c. it has domains that are aligned along the nail’s length.
d. it has domains that are aligned across the nail’s width.

Answers: 2

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Answer from: juanitarodrigue

B. It has domains that are not aligned

Answer from: spacehunter22

B. It has domains that are not aligned.

Explanation:

When domains are aligned, object acts as a magnet and attract other magnetic objects.

Although iron is a magnetic material but it does not act as a magnet all the time. It is a temporary magnet. If it is not picking up paper clips, then it must not be magnetized. This means that at this time, the domains of the iron nail are not aligned.

Answer from: Quest

Is a vector quantity that refers to "the rate at which an object changes its position." imagine a person moving rapidly - one step forward and one step back - always returning to the original starting position. while this might result in a frenzy of activity, it would result in a zero velocity. because the person always returns to the original position, the motion would never result in a change in position. since velocity is defined as the rate at which the position changes, this motion results in zero velocity. if a person in motion wishes to maximize their velocity, then that person must make every effort to maximize the amount that they are displaced from their original position. every step must go into moving that person further from where he or she started. for certain, the person should never change directions and begin to return to the starting position.

Answer from: Quest

the minimum constant speed at which she can catch the train is 2.7 m/s

given:

acceleration = 0.6 $\frac{m}{s^{2} }$

time = 4.5 s

to find:

velocity = ?

formula used:

from 1st kinematic equation we get,

v = u + at

u = initial speed of train = 0 m/s

v = final speed of the train

a = acceleration of the train

t = time

solution:

from 1st kinematic equation we get,

v = u + at

u = initial speed of train = 0 m/s

v = final speed of the train

a = acceleration of the train

t = time

v = 0 + (0.6 × 4.5)

v = 2.7 m/s

the minimum constant speed at which she can catch the train is 2.7 m/s

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An iron nail does not pick up paper clips as a magnet would.
what can be concluded about the s...

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