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3 years ago

The Earth's magnetic field is generated in the Choose one: A. upper mantle. B. outer core. C. crust. D. inner core.

Physics

1 answer:

11111nata11111 [884]3 years ago

6 0

Answer:

Explanation:

Magnetiic field of the earth is generated by the earths outer core

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Some metals have a molecular structure that makes them good conductors. Explain how understanding this relationship can help eng

erastova [34]

Answer:

Explained below.

Explanation:

Conductors can be defined as materials that permit electricity to flow through them easily.

Now, metals have a molecular structure that makes them good conductors because electrons in the atoms of these conductors tend to move freely from one atom to the other. So a majority of metals make good conductors because these metals tend to hold their electrons loosely. In short, it can help engineers make powerful batteries because then it means that they are capable of giving much more electrical energy since nowadays, advanced batteries make use of ion charges for the batteries.

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3 years ago

What type of balls sink and why?

forsale [732]

The type of balls that sink are the ones that are quite heavy because they have molecules that are dense inside of them that makes it sink. Hope it helps!!!

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3 years ago

Read 2 more answers

While watching some tv you see a circus show in which a woman drives a motorcycle around the inside of a vertical ring. you dete

Mila [183]

Since the biker is moving at constant speed

so we will have

$v = \frac{distance}{time}$

here we know that

$distance = 2\pi R$

time = 4 second

now we have

$v = \frac{2\pi R}{4} = \frac{\pi R}{2}$

now at the top point it feels free fall

so it is

$mg = \frac{mv^2}{R}$

$v^2 = Rg$

$(\frac{\pi R}{2})^2 = Rg$

$R = \frac{4g}{\pi^2}$

so height of the bike at the top is same as diameter

$h = 2R$

$h = \frac{8g}{\pi^2} = 7.95 meter$

Yes it will hurt on falling from this height

5 0

4 years ago

A person sits on a freely spinning lab stool that has no friction in its axle. When this person extends her arms, A. her moment

Andrei [34K]

Answer:

C. her moment of inertia increases and her angular speed decreases

D. her moment of inertia increases and her angular speed decreases

Explanation:

The moment of inertia of a body is the sum of the products of an increment of mass and the square of its distance from the center of rotation. When a spinning person extends her arms, part of her mass increases its distance from the center of rotation, so increases the moment of inertia.

The kinetic energy of a spinning body is jointly proportional to the moment of inertia and the square of the angular speed. Hence an increase in moment of inertia will result in a decrease in angular speed unless there is a change in the rotational kinetic energy.

This effect is used by figure skaters to increase their spin rate by drawing their arms and legs closer to the axis of rotation. Similarly, they can slow the spin by extending arms and legs.

When the person extends her arms, her moment of inertia increases and her angular speed decreases.

_____

<em>Note to those looking for a letter answer</em>

Both choices C and D have identical (correct) wording the way the problem is presented here. You will need to check carefully the wording in any problem you may think is similar.

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4 years ago

A 1650 kg car accelerates at a rate of 4.0 m/s. How much force is the car's engine producing?

lakkis [162]

The car produces 412.5 KG per m/s

5 0

3 years ago