How far is it to the stars

Answers

Answer 1

Answer: The closest is the sun. The next star is 4.3 light years away

Answer 2

Answer: The distance to every star is different. The nearest star is the sun. That's 93 million miles away. The next nearest star is a little over four light-years away. From there they range out to 13 billion light-years. There are more past that but we can't see any farther.

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Observations show that interstellar clouds can have almost any shape and, if they are rotating at all, their rotation is not perceptible. however, as shown in the video, the nebular theory predicts that a cloud will rotate rapidly once it shrinks to a small size. what physical law explains why a cloud will rotate rapidly as it collapses?
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A wave with a period of 1/3 second has a frequency of

Answers

The frequency of the wave is 3hz

As you hold book at rest in your hand two forces are being exerted on the book identify the force

Answers

gravity dwn, your hand up and equal to grav

Final answer:

When you hold a book at rest, two forces act upon it: the downward gravitational force exerted by the Earth represented as -14ĵ N and the upward force exerted by your hand that equals 14 N, balancing out the weight of the book. These forces cancel each other out, keeping the book at rest as per Newton's Second Law.

Explanation:

When you hold a book at rest in your hand, two primary forces are acting upon it. These are the gravitational force, which is the book's weight pulling it downwards, and the force exerted by your hand, pushing upwards against the book. The downward gravitational force is caused by the earth's mass attracting the book's mass. This force is represented as -14ĵ N in physics. The force exerted by your hand counters this gravitational pull, allowing the book to remain at rest in your hand.

By Newton's second law, since the book is at rest, the net force acting on the book is zero. Meaning, the gravitational force and the force exerted by your hand cancel each other out. This is represented as: FPH + FEH = 0, where FPH is the force exerted by your hand and FEH is the force exerted by the Earth. With proper calculation, the force exerted by your hand on the book equals 14 N in the upward direction, counteracting the book's weight.

Learn more about Forces on a Resting Book here:

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You step into an elevator on the 50th floor and it quickly accelerates downward. For a second, until steady speed is reached, __________. A.) your weight is unchanged but your mass decreases B.) your mass is unchanged but your weight decreases C.) neither your mass nor weight change but the gravitational force decreases D.) neither your mass nor weight change but your apparent weight decreases

Answers

Answer:

Mass and weight would stay the same. However, the normal force between the person and the ground becomes smaller, making the weight of the person appear smaller.

Explanation:

The mass of an object is an intrinsic property. The mass of the object stays the same regardless of the motion of the object or the forces acting on the object. As a result, when the elevator accelerates downwards, the mass of this person would stay the same.

The weight of an object refers to the gravitational force on this object.

The gravitational force on an object is the product of the mass $m$ and the strength $g$ of the gravitational field:

$(\text{weight}) = m\, g$ .

The gravitational field strength near the surface of the Earth is mostly uniform ( $g \approx 9.81\; {\rm N\cdot kg^(-1)}$ .) Since the mass of this person stays the same, the weight of this person would also stay the same.

When a person stands on level ground, forces on this person would include:

Weight, which points downward, and
Normal force from the ground, which points upward.

The net force on this person would be:

$(\text{net force}) = (\text{weight}) + (\text{normal force})$ .

Rearrange this equation to obtain an expression for normal force:

$(\text{normal force}) = (-(\text{weight})) + (\text{net force})$ .

When the person is not moving, acceleration of the person would be zero. By Newton's Laws of Motion, the net force on this person would also be zero.

In the equation above, the magnitude of the normal force would be equal to the magnitude of weight. It would appear that the normal force on the person is equal in magnitude to the weight of this person.

However, when the person accelerates in the vertical direction, the net force on the person will become non-zero in the vertical direction. Normal force would no longer be equal in magnitude to weight.

Specifically, when the person accelerates downward in this elevator, acceleration of this person would point downward. Net force on this person would also point downward.

In the equation $(\text{normal force}) = (-(\text{weight})) + (\text{net force})$ , $(\text{weight})$ also points downward. However, because of the negative sign $(-(\text{weight}))$ and $(\text{net force})$ would be in opposite directions.

Additionally, the magnitude of net force cannot exceed the magnitude of weight. As a result, the magnitude of the sum of these two vectors would be smaller than the magnitude of weight.

The normal force on this object is equal to the sum of these two vectors. As a result, the magnitude of normal force would also be smaller than the magnitude when the person isn't moving. It would appear as if the apparent weight of this person has become smaller than the original value.

What is the exact meaning of croos section and cross sectional area of a conductor?

Answers

The cross section is the little tiny circle you see when you cut a wire
and look at the flat, cut end.

The cross-sectional area of the wire is the area of that little circle.
It's equal to

Area = (pi) x (1/4) x (Diameter of the wire)²

Force is applied to an object and the object is moved over a distance in the same direction of the applied force" is the definition of (2 points)a. balanced force.
b. gravitational force.
c. power.
d. work

Answers

Answer:

The correct answer to your question is B. Gravitational force because the force is applied to one object as it is applied to the same direction.

Explanation:

its not work!!!

plz if you don"t know n answer to a question don"t answer it i could hurt others grade. brainly is for helping other not putting wrong answer and make the person get a bad grade

im just saying :)

Answer: IT IS NOT GRAVITATIONAL FORCE; I think it’s work

Explanation:

I put gravitational force and got it wrong

What type of force cause an object to accelerate??

Answers

ANY force causes an object to accelerate, just as long as there are not
some other forces on the object that cancel out the first one.

Are you looking for the answer ... an "UNBALANCED" force ?
That's a very poor way to describe it, because there's no such thing
as a balanced or unbalanced force. The thing that's balanced or
unbalanced is a GROUP of forces, not a single force.

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