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Lunna [17]
3 years ago
10

Kate is working on a project in her tech education class. She plans to assemble a fan motor. Which form of energy does the motor

convert most of its electric energy into?
Physics
2 answers:
BartSMP [9]3 years ago
6 0

Answer:

Motor converts electrical energy into mechanical energy.

Explanation:

Motor is  a device which is used to perform mechanical work . its working principle depends  on electromagnetism.

A power source is connected to a rectangular coil of wire which is placed in between the poles of a powerful magnet. This creates the necessary electromagnetic  force . The turning effect provided by this force, which is called torque is always proportional to the strength of the magnetic field.

In motors there exist two different types. One is A.C. (alternating current) motor and another is D C ( direct current) motor. The main contrast between these two is an alternating current source  provides the current in AC motor. A battery provides the current for a DC motor.

Sunny_sXe [5.5K]3 years ago
5 0

Motor convert most of its electric energy into mechanical energy. <span>Electric motors make mechanical energy through the interaction between magnetic fields.  </span>

Take two magnets and attempt to push their North poles together.  There will be a repulsive force that resists this motion.  Move one North pole near the other magnet's South pole.  There will be an attractive force that pulls them together.

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A satellite moves in a circular orbit at a constant speed v0 around Earth at a distance R from its center. The force exerted on
postnew [5]

Answer:

vT = v0/3

Explanation:

The gravitational force on the satellite with speed v0 at distance R is F = GMm/R². This is also equal to the centripetal force on the satellite F' = m(v0)²/R

Since F = F0 = F'

GMm/R² = m(v0)²/R

GM = (v0)²R  (1)

Also, he gravitational force on the satellite with speed vT at distance 3R is F1 = GMm/(3R)² = GMm/27R². This is also equal to the centripetal force on the satellite at 3R is F" = m(vT)²/3R

Since F1 = F'

GMm/27R² = m(vT)²/3R

GM = 27(vT)²R/3

GM = 9(vT)²R (2)

Equating (1) and (2),

(v0)²R = 9(vT)²R

dividing through by R, we have

9(vT)² = (v0)²

dividing through by 9, we have

(vT)² = (v0)²/9

taking square-root of both sides,

vT = v0/3

6 0
3 years ago
The bell rings and a physics student heads to class. They stop to talk to a few friends. They slow
grin007 [14]

Answer:

420m

Explanation:

Given parameters:

Time  = 5minutes

Average speed  = 1.4m/s

Unknown:

Distance covered  = ?

Solution:

Speed is the rate of change of distance with time.

 Mathematically;

              Speed  = \frac{distance}{time}  

    Distance  = speed x time

 

Insert the parameters and solve;

   Convert the time to seconds;

              1 minute = 60s

               5 minute = 5  x 60 = 300s

So,

   Insert the parameters and find the distance;

     Distance  = 300 x 1.4  = 420m

3 0
3 years ago
Light travels slowest in high density media, faster in lower density media, and fastest in low density media.
Anit [1.1K]

Based on what we know, we can confirm that the wave behavior being observed when light passes through media of different densities is refraction.

<h3>What is refraction?</h3>

This is a term used to explain the behavior of light as it moves through distinct mediums. This behavior includes a change in direction of the light due to its change in speed.

Therefore, the wave behavior being observed when light passes through media of different densities is refraction.

To learn more about light waves visit:

brainly.com/question/3004869?referrer=searchResults

7 0
2 years ago
A laser beam is used to levitate a metal disk against the force of earth's gravity.
laila [671]

The necessary light intensity of the disk if the disk has mass 3.89 g and radius 2.40 cm is 6.483 x 10^12cd.

<h3>Calculations and Parameters:</h3>

a. Given that:

  • i= intensity of light
  • m= mass of disk
  • g= gravitational acceleration
  • c= speed of light
  • a= cross-sectional area of the disk

I = P/A

= Force x Speed/Area

Gravitational force, F= GM1M2/r^2

F= ma, F= mg

I= mg x c/q

That is,

i= mass x gravitational acceleration x speed/area

b.

Mass= 3.89g

Radius, r= 2.40cm

i=?

i= mg x c/a

Speed of light= 3.0 x 10^8 m/s

Area, a= /pi r^2

= 3.142 x (0.024)^2

= 3.142 x 0.000576

= 0.0018m^2.

i= 3.89 x 10 x 3.0 x 10^8/0.0018

i= 6.483 x 10^12cd.

c. Light has no mass, therefore, it lacks momentum and cannot exert pressure for propulsion of materials.

Read more about light intensity here:

brainly.com/question/11355584

3 0
3 years ago
At what point on the hill will the car have zero gravitational potential energy?
natali 33 [55]
C) at the bottom of the hill
8 0
3 years ago
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