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Julli [10]
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:
dalvyx [7]3 years ago
8 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.

polet [3.4K]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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An energy storage system based on a flywheel (a rotating disk) can store a maximum of 3.7 MJ when the flywheel is rotating at 16
Likurg_2 [28]

The moment of inertia of the flywheel is 2.63 kg-m^{2}

It is given that,

The maximum energy stored on the flywheel is given as

E=3.7MJ= 3.7×10^{6} J

Angular velocity of the flywheel is 16000\frac{rev}{min} = 1675.51\frac{rad}{sec}

So to find the moment of inertia of the flywheel. The energy of a flywheel in rotational kinematics is given by :

E = \frac{1}{2}Iw^{2}

By rearranging the equation:

I = \frac{2E}{w_{2} }

I = 2.63 kg-m^{2}

Thus the moment of inertia of the flywheel is 2.63 kg-m^{2}.

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7 0
2 years ago
A thread holds a 1.5-kg and a 4.50-kg cart together. After the thread is burned, a compressed spring pushes the carts apart, giv
maksim [4K]

Answer:

c. 8.67 cm/s

Explanation:

From the law of conservation of momentum,

Total momentum before the thread was burned = Total momentum after was burned

mu + m'u' = mv + m'v'...................... Equation

Where m = mass of the heavier cart, m' = mass of the lighter cart, u = initial velocity of the bigger cart, u' = initial velocity of the smaller cart, v = final velocity of the bigger cart, v' = final velocity of the smaller cart.

Note: Both cart where momentarily at rest, as  such u = u' = 0. i.e the total momentum before the thread was burn = 0

And assuming the left is positive,

We can rewrite equation 1 as

mv + m'v' = 0............................................ Equation 2

Given: m = 4.5 kg, m' = 1.5 kg, v' = 26 cm/s

Substitute into equation 2,

4.5v + 1.5(26) = 0

4.5v + 39 = 0

4.5v = -39

v = -39/4.5

v = -8.67 cm/s.

Note: v is negative because it moves to right.

Hence the velocity of the 4.5 kg cart = 8.67 cm/s.

The right option is c. 8.67 cm/s

7 0
4 years ago
Define constant speed
mash [69]
It is the speed at which a body moves without any interuptions (external forces etc)
7 0
3 years ago
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How many significant figures are there in the measurement (4.07×10^17m)
Alex17521 [72]

Answer:

2...................

6 0
3 years ago
Please help! I'd really appreciate it :-)
Alexxx [7]

Answer:

0.31429 Amps

Explanation:

Using the "Ohm's Law" we can look for the current (amps) with a formula of I = V/R

Given:

Resistance (Ohm) = 350

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Solution:

I = 110v/350r

I = 0.31429 amps

6 0
3 years ago
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