Which of the following describes an electric conductor?

Physics

2 answers:

Whitepunk [10]3 years ago

8 0

An electric conductor conducts (transports or allows to pass) any electricity with facility.

Sliva [168]3 years ago

7 0

A substance which allows the un-interrupted flow of electric current is called an electric conductor

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a 230-newton box rests on a plank 5 meters long. One end is 1.2 meters higher than the other end. Find the components of the for

NISA [10]

Answer:

55.3 N, 223.3 N

Explanation:

First of all, we can find the angle of the inclined plane.

We have:

L = 5 m the length of the incline

h = 1.2 m is the height

We also have the relationship

$h = L sin \theta$

where $\theta$ is the angle of the incline. Solving for the angle,

$\theta= sin^{-1} (\frac{h}{L})=sin^{-1} (\frac{1.2 m}{5 m})=13.9^{\circ}$

Now we can find the components of the weight of the box, which is the force that the box exerts on the plank. Calling W = 230 N the weight of the box, we have:

- Component parallel to the incline:

$W_{par} = W sin \theta = (230 N)(sin 13.9^{\circ}) =55.3 N$

- Component perpendicular to the incline:

$W_{per} = W cos \theta = (230 N)(cos 13.9^{\circ}) =223.3 N$

4 0

3 years ago

A mountain climber packs too much gear and finds it difficult to reach the summit before a storm blows in. How does this scenari

MissTica

As the climber climbs the mountain, he needs to over his or her own weight component along the slope of the mountains.

By Newton's second law: Net force = Mass x acceleration

Hence, greater the mass, greater will be the force required to move up the mountain. Hence, the climber will need to apply higher force to climb up as he or she has packed too much, which resulted in the increase in the mass. Hence, there is a increase in the force which will pull him or her downward.

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3 years ago

Read 2 more answers

An automobile starts from rest and accelerates to a final velocity in two stages along a straight road. Each stage occupies the

qaws [65]

Answer:

The answer is a2 = 4.48 m/s2

Explanation:

Let´s start with the equations we know: