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3 years ago

What is the main difference between a generator and an electric motor?

Physics

2 answers:

Amanda [17]3 years ago

7 0

I got B
Hoped it helped

Novosadov [1.4K]3 years ago

4 0

Answer:

Explanation:

an electric motor is a machine that converts electrical energy to mechanical energy. a generator is a machine that converts mechanical energy to electrical energy

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Light from the sun travels in electromagnetic waves. Which of these statements describe electromagnetic waves?

kupik [55]

Complete Question:

Light from the sun travels in electromagnetic waves. Which of these statements describe electromagnetic waves? Choose the 3 that apply.

Group of answer choices.

a) consist of transverse wave patterns.

b) can move through a vacuum.

c) caused by a vibration in a medium.

d) consist of longitudinal wave patterns.

e) requires a medium, such as air, to travel.

f) made of vibrating electric and magnetic fields.

Answer:

a) consist of transverse wave patterns

b) can move through a vacuum

f) made of vibrating electric and magnetic fields

Explanation:

Electromagnetic waves is a propagating medium used in all communications device to transmit data (messages) from the device of the sender to the device of the receiver.

Generally, the most commonly used electromagnetic wave technology in telecommunications is light and radio waves. Light from the sun travels in electromagnetic waves.

The statements which describe electromagnetic waves are;

I. It consist of transverse wave patterns.

II. It can move through a vacuum.

III. It is made of vibrating electric and magnetic fields.

7 0

2 years ago

Question 2

DaniilM [7]

P=m.v

v=P/m

v=500/20

v=25 m/s

4 0

2 years ago

A 600 g model rocket is on a cart that is rolling to the right at a speed of 2.5 m/s. The rocket engine, when it is fired, exert

Sergio039 [100]

Answer: 8.43 m

Explanation:

Given

Mass of the rocket, m = 600 g = 0.6 kg

Speed of riling, v = 2.5 m/s

F = mg, where

F = weight of the rocket in N

m = mass of the rocket in kg

g = acceleration due to gravity in m/s²

F = 0.6 * 9.8

F = 5.88 N

Since the the vertical thrust on the rocket is 8 N and 5.88 N of it will be used to counter the rockets weight. Thus, the remaining 2.12 N is what is available to provide acceleration.

Upward acceleration of the rocket is..... F = ma, a = F / m

a = 2.12 / 0.6

a = 3.53 m/s²

using equation of motion, we will calculate how long it will take to rise 20 m in the air

S = ut + 1/2at², where u = 0

20 = 1/2 * 3.53 * t²

t² = 4. / 3.53

t² = 11.33

t = √11.33 = 3.37 s

The distance then is

v = Δx / t, such that

Δx = v * t

Δx = 2.5 * 3.37

Δx = 8.43 m

4 0

3 years ago

Read 2 more answers

Represent 8953 ms with Sl units having an appropriate prefix Express your answer to four significant figures and include the app

tatyana61 [14]

Answer:

8.953 s

Explanation:

Here a time of 8953 ms is given.

Some of the prefixes of the SI units are

mili = 10⁻³

micro = 10⁻⁶

nano = 10⁻⁹

kilo = 10³

Mega = 10⁶

Each prefix increases or decreases by a factor of 10³

The number is 8953.0

Here, the only solution where the number of significant figures is mili. If any other prefix is chosen then the significant figures will increase.

$1 milisecond = 1000 second$

$1\ second=\frac{1}{1000}\ milisecond$

$\\\Rightarrow 8953\ milisecond=\frac{8953}{1000}\ second\\ =8.953\ second$

So, 8953 ms = 8.953 s

8 0

3 years ago

Suppose, the same angular momentum is transferred to two rotating bodies of different moment of inertia , how will you compare t

Sonbull [250]

Answer:

As per the law of conservation of angular momentum, the angular velocity will be higher for the body with a lower moment of inertia and vice versa.

Explanation:

Angular momentum L of a body is given by:

$L=I\times \omega$

Now when the same angular momentum is transferred to two different bodies with different moment of inertia, the body with a higher moment of inertia will have lower angular velocity and vice versa.

4 0

3 years ago