1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
dedylja [7]
3 years ago
7

Tech A says that a relay is a one-way electrical check valve used in alternators to change AC into DC. Tech B says that a relay

uses electromagnetism to open or close a switch. Who is correct?
Physics
1 answer:
Setler [38]3 years ago
7 0

Answer:

The correct answer is from Tech B.

Explanation:

The relay is an electromagnetic device, which is stimulated by a very weak electrical current to open or close a circuit.  It functions as a switch controlled by an electrical circuit in which, by means of a coil and an electromagnet, a sequence of one or several contactors is activated that allow to open or close other electrical circuits independent of the one that controls it.

Have a nice day!

You might be interested in
a train car of mass 444 kg moving at 5 m/s bounces into another car on the same tracks of mass 344 king. of the second car was m
Kamila [148]

Answer:

3.7 m/s

Explanation:

M = 444 kg

U = 5 m/s

m = 344 kg

u = - 5 m/s

Let the velocity of train is V and the car s v after the collision.

As the collision is elastic

By use of conservation of momentum

MU + mu = MV + mv

444 x 5 - 344 x 5 = 444 V + 344 v

500 = 444 V + 344 v

125 = 111 V + 86 v .... (1)

By using the formula of coefficient of restitution ( e = 1 for elastic collision)

e = \frac{V-v}{u-U}

-5 - 5 = V - v

V - v = - 10

v = V + 10

Substitute the value of v in equation (1)

125 = 111 V + 86 (V + 10)

125 = 197 V + 860

197 V = - 735

V = - 3.7 m/s

Thus, the speed of first car after collision is 3.7 m/s. negative sign shows that the direction is reverse as before the collision.

4 0
3 years ago
How far does a runner run if he runs for 60 seconds at 5 m/s
mylen [45]

Answer: 20 miles

Explanation:

4 0
3 years ago
A balance uses small metal weights of known mass to determine the mass of a substance. Where would a balance NOT function correc
tatuchka [14]

Answer:

D is the answer.

Explanation:

Just do it.

6 0
3 years ago
Read 2 more answers
In order for electrical current to flow through a solid, _____. the solid must have electrons the electrons in the solid must be
nydimaria [60]

Electrical current will flow through a solid by the means of electrons.  The electrons in the solid must be able to move from lower to higher electrical potential. The electric current in certain solid electrolytes like ice is entirely composed of flowing ions.

6 0
3 years ago
Read 2 more answers
Forensic Odontologists look at number of teeth, tooth development and tooth degeneration to determine
avanturin [10]
It would be
<span>B) ancestry </span>
5 0
3 years ago
Read 2 more answers
Other questions:
  • The three different states of matter are liquid, solid, and gas. A solid is something you can hold in your fingers, while a liqu
    15·2 answers
  • Which of the following tools is used to observe objects that are very far away? A. a anemometer B. a hand lens C. a microscope D
    10·2 answers
  • Suppose you increase your walking speed from 7 m/s to 15 m/s in a period of 2 m. What is your acceleration?
    7·1 answer
  • Which is happening when humans control the breeding of living things to favor certain desired features?
    15·1 answer
  • At what speed (in m/s) will a proton move in a circular path of the same radius as an electron that travels at 8.00 ✕ 106 m/s pe
    12·1 answer
  • You kick a soccer ball with a speed of 18 m/s at an angle of 43. How long does it take the the ball to reach the top of its traj
    5·1 answer
  • Using Gauss's law, calculate the electric field at a point distance s from a long wire bearing uniform charge density. i need he
    11·1 answer
  • At the time of the founding of the country, most Americans worked as
    14·2 answers
  • PLeAsE hElp <br> What is the kinetic energy of 14 Kg traveling at a velocity of 3m/s east
    13·1 answer
  • A power supply is connected to a 59 Ohm resistor and a 53 Ohm resistor in series. The total current is found to be 0.15 A. What
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!