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3 years ago

Describe a situation in which an object's speed is constant but its velocity is changing.

1 answer:

5 0

1) If the object changes directions with the same speed, it will be changing its velocity, because velocity is a vector, which depends on both magnitude and direction. Speed is just magnitude regardless of direction.

2) Rotational motion.

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Answer these please.

PolarNik [594]

Explanation:

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3 years ago

Which planet has the GREATEST attraction to the sun? A) Mars B) Pluto C) Saturn D) Mercury

emmasim [6.3K]

I believe the answer is D. It is D because Mercury is the closest planet to the sun and has the greatest gravitational attraction between the sun

6 0

3 years ago

Read 2 more answers

Compare and contrast gravitational potential energy and elastic potential energy.

enot [183]

Answer:

Potential energy is energy that is stored in a person or object.Gravitational potential energy depends on an object's weight and its height above the ground (GPE = weight x height). Elastic potential energy is due to an object's shape. It results when an elastic object is stretched or compressed.

Explanation:

3 0

3 years ago

A particle with a positive charge q is moving in the positive x direction with velocity of magnitude v0. If there were an electr

salantis [7]

Answer:

First, let's define the coordinate axes: positive x direction is to the right, positive y direction is to upwards, and z direction is out-of-the plane (towards you).

If the particle is moving with velocity $v_0$ in the presence of an external E-field, than according to the below formula E-field pushes the positive charge in the direction of the field, which is upward.

$F = Eq$ .

If the velocity of the particle is unchanged, this means that the particle does not have an acceleration, so net force applied to the particle is zero.

We know that the force caused by the E-field is upwards, so an equal amount of another force is directed downwards. This second force is caused by magnetic field. $|F_B| = qvB$

$F_{net} = 0\\F_{net} = F_E - F_B\\0 = qE_0 - qvB\\qE_0 = qvB\\B = \frac{E_0}{v}$

This is the magnitude of the magnetic field.

For the direction of the magnetic field we can use right-hand rule with the following equation:

$F_B = q(v \times B)$

Here, $v$ is in the x-direction. $F_B$ is in the (-y)-direction.

According to the right-hand rule, B-field should be in the z-direction (out-of-the plane, towards you.)

Explanation:

3 0

3 years ago

Glass is called fourth state of matter.give reasons<br>

Lunna [17]

Answer:

Glass is a solid. It is a kind of solid known as “amorphous crystalline” which means it is substantially similar to familiar crystals such as quartz, diamond, and table salt. The only difference is that the molecules of glass have crystallized in a random arrangement instead of a repeating pattern like a basic crystal.

Explanation:

6 0

3 years ago