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4 years ago

5

An electromagnet cannot be shut off once it is started. True or False

2 answers:

Tresset [83]4 years ago

6 0

False the electro magnet is controlled electrically so its like turning on/off a switch thing of the magnets they have at junkyards.

andre [41]4 years ago

3 0

The answer to this would be False

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Question 1 (1 point)

IrinaK [193]

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3 years ago

Can sometimes solve problem 16

NISA [10]

It’s called the the magnetic field

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3 years ago

17) Which states of matter have particles that move independently of one another with very little attraction? A) gas and plasma

Vadim26 [7]

The right answer is A. Gas and plasma

6 0

3 years ago

A block of mass 12.2 kg is sliding at an initial velocity of 6.65 m/s in the positive x-direction. The surface has a coefficient

valentina_108 [34]

Explanation:

Given that,

Mass of the block, m = 12.2 kg

Initial velocity of the block, u = 6.65 m/s

The coefficient of kinetic friction, $\mu_k=0.253$

(a)The force of kinetic friction is given by :

$f=\mu_k mg$

mg is the normal force

So,

$f=0.253\times 12.2\times 9.8\\\\f=30.24\ N$

(b) Net force acting on the block in the horizontal direction,

f = ma

a is the acceleration of the block

$a=\dfrac{f}{m}\\\\a=\dfrac{30.24}{12.2}\\\\a=2.47\ m/s^2$

(c) Let d is the distance covered by the block before coming to the rest. Using third equation of motion as follows :

$v^2-u^2=2ad\\\\d=\dfrac{v^2-u^2}{2a}\\\\d=\dfrac{-(6.65)^2}{2\times 2.47}\\\\d=-8.95\ m$

Hence, this is the required solution.

3 0

3 years ago

What three characteristics do geologist look for when observing a rock sample

lord [1]

Texture hardness and color

5 0

3 years ago

Read 2 more answers