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marshall27 [118]
3 years ago
7

A device that uses electricity and magnetism to create motion is called a (motor magnet generator) . In a reverse process, a dev

ice that uses motion and magnetism can be used to create (light, electromagnetism, electricity ).
Physics
2 answers:
Tems11 [23]3 years ago
6 0

the answers are a. and c.

I hope I help you out!

Galina-37 [17]3 years ago
6 0

Answer: A device that uses electricity and magnetism to create motion is called a <u> motor .</u> In a reverse process, a device that uses motion and magnetism can be used to create <u>electricity</u>

Explanation:

A motor is a device that uses electricity and magnetism converts it to mechanical energy. A current carrying wire is placed between two magnets. A force is produced which causes the current carrying wire to rotate. Motor is used to pull water in pipelines.

In the reverse process, a generator uses motion and magnetism to produce electric current. When a conducting wire is placed between changing magnetic field, electromotive force is induced which causes electricity to flow in the wire.

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Modern wind turbines are larger than they appear, and despite their apparently lazy motion, the speed of the blades tips can be
Crank

Answer:

(a) v = 65.35 m/s

(b) ac = 82.16 m/s²

Explanation:

Kinematic of the blades of the wind turbine

The blades of the wind turbine describe circular motion and the formulas that apply to this movement are as follows:

v = ω * R   Formula (1)

Where:

v : tangential velocity (m/s)

ω : angular velocity (rad/s)

R : radius of the particle path (m)

The velocity vector is tangent at each point to the trajectory and its direction is that of movement. This implies that the movement has centripetal acceleration (ac):

ac =  ω²* R Formula (1)

ac : centripetal acceleration (m/s²)

Data:

ω=  12 rpm = 12 rev/min

1 rev = 2π rad

1 min = 60 s

ω=  12 rev/min = 12 (2π rad)/(60 s)

ω = 1.257 rad/s

R = 52 m

(a)Tangential velocity at the tip of a blade (v)

We apply the formula (1)

v =  ω* R

v =  ( 1.257)* (52) = 65.35 m/s

(a)  Centripetal acceleration at the tip of a blade (ac)

We apply the formula (2)

ac =  ω²*R

ac =   ( 1.257)²* (52) = 82.16 m/s²

6 0
3 years ago
Which of these sensors would be least likely used as an input sensor?
Alex787 [66]

Answer:

C. Fuel

Explanation:

8 0
3 years ago
True or false? Scientific laws can be expressed through a law that relates several variables.
Marina86 [1]

Answer:

True

Explanation:

Scientific laws are often written as expressions that contains variables and are laws that are binding themselves.

In science, laws are natural phenomenon that draws from careful observations that holds through following a series of detailed study. Within the range of assumed parameters, a law will always hold true.

Most laws in science are denoted using mathematical variables which helps to interpret them.

The variables shows the relationship between the different parts of the law.

For example, Newton's law of universal gravitation is expressed mathematically as shown below;

                          F  =  \frac{G m_{1} m_{2}  }{r^{2} }

where G, m and r are all variables.

  G is the universal gravitation constant

   m is mass

   r is the distance between them.

   F is the gravitational force.

Most scientific laws are often expressed in this format.

5 0
3 years ago
Which best describes velocity?
Nata [24]

Answer:

B. 15 miles an hour going west

3 0
3 years ago
Which of these describes the object’s motion after the time shown on the graph?
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There's nothing popping up
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