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
artcher [175]
2 years ago
13

Very briefly describe the way an electromagnet works.

Physics
1 answer:
Lady_Fox [76]2 years ago
3 0

Answer:

Because the electromagnet is made up of moving coils, when an electric current passes through, the coils act like a magnet.

Explanation:

You might be interested in
4. Is the force of the earth’s gravity on the sun stronger, weaker, or the same as the force of the sun’s gravity on the earth?
Nady [450]

Answer:

The first statement is false, the Sun has a stronger gravitational pull.

:

5 0
2 years ago
Two spectators at a soccer game in Montjuic Stadium see, and a moment later hear, the ball being kicked on the playing field. Th
Akimi4 [234]

Answer:

a) The distance of spectator A to the player is 79.2 m

b) The distance of spectator B to the player is 43.9 m

c) The distance between the two spectators is 90.6 m

Explanation:

a) Knowing the time it takes the sound to reach both spectators, we can calculate their position relative to the player, using this equation:

x = v * t

where:

x = position of the spectators

v = speed of sound

t = time

Then, the position for spectator A relative to the player is:

x = 343 m/s * 0.231 s = 79.2 m

b)For spectator B:

x = 343 m/s * 0.128 s

x = 43.9 m

The distance of spectator A and B to the player is 79.2 m and 43.9 m respectively.

c) To calculate the distance between the spectators, please see the attached figure. Notice that the distance between the spectators is the hypotenuse of the triangle formed by the sightline of both. We already know the longitude of the two sides. Then, using Pythagoras theorem:

(Distance AB)² = A² + B²

(Distance AB)² = (79.2 m)² + (43.9 m)²

Distance AB = 90. 6 m

6 0
3 years ago
A satellite of mass m completes one revolution around the earth at a constant speed s and radius r.
MAXImum [283]

Answer:

d. The magnitude of the work done by the earth on the satellite is non zero

Explanation:

The work done is equal to the product of the force and the distance moved in the direction of the force, the force and the distance act perpendicular to one another, therefore no work is done in the circular motion of the movement of the earth.

8 0
3 years ago
What are disadvantages of using fossil fuels to generate electricity? Check all that apply.
laila [671]
Fossil fuels are non-renewable resources and create greenhouse gases.  While cheaper now to  burn fossil fuels, within fifty years we will run out and have to turn to other sources of energy.  Hope this helps!!!
3 0
3 years ago
Read 2 more answers
7. Katie and her best friend liam play tennis every saturday morning. When katie serves the ball to liam, it travels 9.5 meters
Ksenya-84 [330]

Answer:

The velocity of the tennis ball is 4.52 m/s.

Explanation:

Given that,

The distance covered by ball, d = 9.5 meters (due south)

Time, t = 2.1 sec

Let v is the velocity of the tennis ball. We know that the velocity of an object is given by the total distance covered divided by total time taken. It is given by :

v=\dfrac{d}{t}\\\\v=\dfrac{9.5\ m}{2.1\ s}\\\\v=4.52\ m/s

So, the velocity of the tennis ball is 4.52 m/s. Hence, this is the required solution.

6 0
3 years ago
Other questions:
  • What effect does an unbalanced force have on an object?
    10·2 answers
  • A boy throws a steel ball straight up. consider the motion of the ball only after it has left the boy's hand but before it touch
    11·2 answers
  • A bus accelerates at -0.5 m/s2 for 12.5 seconds . If the bus had an initial speed of 31 m/s, what is its new speed? A. 12.25m/s
    12·1 answer
  • For all turning vehicles, the rear wheels follow a ______ than the front wheels.
    11·1 answer
  • In addition to the conditions required for any solar eclipse, what must also be true in order for you to observe a total solar e
    8·1 answer
  • Two workers are sliding 490 kg crate across the floor. One worker pushes forward on the crate with a force of 410 N while the ot
    10·2 answers
  • Charge q is a test charge used to measure the electric field created by a source charge Q. What happens to the magnitude of the
    8·1 answer
  • The answer is b :)
    8·2 answers
  • Which list contains only vector quantities?
    11·1 answer
  • What is the fastest motion that can be measured in any frame of reference?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!