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Dahasolnce [82]

3 years ago

12

a fan is rotating clockwise and its acceleration has a positive sign. is the angular velocity of the fan speeding up, slowing do

wn, or constant?

1 answer:

balu736 [363]3 years ago

5 0

Answer:

The angular velocity is slowing down.

Explanation:

By convention, if a rigid body is rotating clockwise, the angular velocity is negative.
If the angular acceleration has a positive sign, since the angular acceleration and the angular velocity have opposite signs, this means that the angular velocity is slowing down.

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What is the electric force (with direction) on an electron in a uniform electric field of strength 3400 N/C that points due east

wlad13 [49]

Answer:

So, the force its $\ 5.4468 \ 10 ^{-16}$ N to the west.

Explanation:

The force $\vec{F}$ on a charge q made by an electric field $\vec{E}$ its

$\vec{F} = q \vec{E}$

The electric charge of the electron its

$q \ = \ - \ 1.602 \ 10 ^{-19} \ C$ .

Taking the unit vector $\hat{i}$ pointing towards the east, the electric field will be:

$\vec{E}= 3400 \ \frac{N}{C} \ \hat{i}$ .

So, the force will be:

$\vec{F} = \ - \ 1.602 \ 10 ^{-19} \ C \ * \ 3400 \ \frac{N}{C} \ \hat{i}$

$\vec{F} = \ - \ 5446.8 \ 10 ^{-19} \ N \ \hat{i}$

$\vec{F} = \ - \ 5.4468 \ 10 ^{-16} \ N \ \hat{i}$

$\vec{F} = \ - \ 5.4468 \ 10 ^{-16} \ N \ \hat{i}$

$\vec{F} = \ - \ 5.4468 \ 10 ^{-16} \ N \ \hat{i}$

So, the force its $\ 5.4468 \ 10 ^{-16}$ N to the west.

5 0

3 years ago

A particle (mass = 5.0 g, charge = 40 mC) moves in a region of space where the electric field is uniform and is given by Ex = –2

taurus [48]

Answer: 40m

Explanation: Distance is a function of speed/ velocity and time.

From the question the velocity along the z axis is given as 20 m/s at t = 0 secs We were ask to calculate the distance travelled when t = 2secs.

Recall that,

Velocity = distance travelled / time

Since we're calculating for distance we make it subject of formula;

Distance travelled = velocity * time

= 20m/s * 2s

= 40meter.

3 0

3 years ago

A girl moves quickly to the center of a spinning merry-go-round, traveling along the radius of the merry-go-round. Which of the

DochEvi [55]

Answer:

The angular speed of the system increases.

The moment of inertia of the system decreases.

Explanation:

As we know that the girl is going towards the center of the circle so here the moment of inertia of the girl is given as

$I = mr^2$

here we know that

r = position of the girl from the center of the disc

now we know that the girl is moving towards the center so its distance will continuously decreasing

So the moment of inertia of the girl will decrease

Now we know that that with respect to the center of the disc there is no torque on the disc + girl system

So here we can use angular momentum conservation

So we have

$I\omega = constant$

since moment of inertia is decreasing for the system

so angular speed will increase

3 0

4 years ago

Question below in photo!! Please answer! Will mark BRAINLIEST! ⬇⬇⬇⬇⬇⬇⬇

MissTica

<em>its wave length </em>

<em>its wave lenght because how its measure</em>

6 0

3 years ago

How does the density of fluid affect the magnitude of buoyancy acting on an object immersed in it

Oksi-84 [34.3K]

Answer:

Explanation:

more the density , more will be the buoyant force acting on it , less the density less will be the buoyant force acting on it. This is why people float in dead sea and sink in other seas

5 0

4 years ago