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Umnica [9.8K]
2 years ago
12

A/An _____ is an apparatus that converts electric energy to kinetic energy.

Physics
2 answers:
erica [24]2 years ago
6 0

Answer:  A Motor converts electrical energy into kinetic energy, the opposite of a generator, which converts kinetic energy to electrical energy.

Natali [406]2 years ago
5 0

Any machine or appliance with an MOTOR in it does that.

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Consider two parallel wires carrying current in the same direction. Which one of the following statements is true concerning thi
Sedbober [7]

Answer:A the two wire will attract each other

Explanation:

When current is flowing in a wire it is surrounded by magnetic field whose direction can be given by right hand thumb rule.

If current is in direction of your thumb then wrapping of fingers will give the direction of magnetic field.

If two wires with current in same direction flows then the combined  magnetic field will be constructive in nature and thus they attract each other.

force on second wire due to first wire is

F_{21}=I_2\vec{L_2}\times B_1 which will be towards the first wire

3 0
3 years ago
A 0.200 H inductor is connected in series with a 88.0 Ω resistor and an ac source. The voltage across the inductor is vL=−(12.0V
Step2247 [10]

Answer:

a.  (VL)R/ωL[1 - cos[ωt]]  = (10.84 V)[1 - cos[(487rad/s)t]]

b. 1.084 mV

Explanation:

a. Since it is a series circuit, the current in the inductor is the same as the current in the resistor.

Now, the voltage across the inductor vL = -Ldi/dt.

So, the current, i = -1/L∫vLdt.

Now, vL = −(12.0V)sin[(487rad/s)t] and L = 0.200 H

Substituting these into i, we have

i = -1/L∫vLdt

= -1/0.200H∫[−(12.0V)sin[(487rad/s)t]]dt.

= -[−(12.0V)]/0.200H∫[sin[(487rad/s)t]]dt.

= 60V/H∫[sin[(487rad/s)t]]dt

Integrating i, we have

i = 60V/H ÷ [(487rad/s)[-cos[(487rad/s)t]] + C

at t = 0, i(0) = 0

0 = 60V/H ÷ [(487rad/s)[-cos[(487rad/s)× 0]] + C

0 = 60V/H ÷ [(487rad/s)[-cos[0]] + C

0 = 60V/H ÷ [(487rad/s)[-1]+ C

C = 60V/H ÷ [(487rad/s)

So, i = 60V/H ÷ [(487rad/s)[-cos[(487rad/s)t]] + 60V/H ÷ [(487rad/s)

i =  60V/H ÷ [(487rad/s)[1 - cos[(487rad/s)t]]

i = (0.123A)[1 - cos[(487rad/s)t]] = VL/ωL[1 - cos[ωt]] where ω = 487rad/s and VL = 12.0 V and L = 0.200 H

So, the voltage across the resistor vR = iR where R = resistance of resistor = 88.0 Ω

So, vR = iR = VL/ωL[1 - cos[ωt]] × R = (VL)R/ωL[1 - cos[ωt]]

=  (0.123A)[1 - cos[(487rad/s)t]] × 88.0 Ω

= (10.84 V)[1 - cos[(487rad/s)t]]

b. vR at t = 2.00 ms = 0.002 s

So, vR = (10.84 V)[1 - cos[(487rad/s)(0.002)]]

= (10.84 V)[1 - cos[0.974]]

= (10.84 V)[1 - 0.9999]

= (10.84 V)(0.0001)

= 0.001084

= 1.084 mV

3 0
3 years ago
A peregrine falcon dives at a pigeon. The falcon starts downward from rest with free-fall acceleration. If the pigeon is 56.0 m
goldenfox [79]

 

The solution would be like this for this specific problem:

 

<span>v = ? </span><span>
<span>u = 0.0 m/s </span>
<span>a = 9.8 m/s^2 </span>
<span>s = 56.1 m </span></span>

<span>v^2 = (0.0 m/s)^2 + [2 * (9.8 m/s^2) * (56 m) ] </span><span>
<span>v^2 = 2 * (9.8 m/s^2) * (56 m) </span>
<span>v^2 = 1,097.6 m^2/s^2 </span>
<span>v = SQRT {1,097.6 m^2/s^2 } </span></span>

v = 33.1 m/s

<span>v = u + at </span>

<span>(v - u) / a = t </span>

[ (33.1 m/s) - (0.0 m/s) ] / (9.8 m/s^2) = 3.38 seconds

If the pigeon is 56.0 m below the initial position of the falcon, it will take 3.38 seconds for the falcon to reach the pigeon. I am hoping that this answer has satisfied your query and it will be able to help you in your endeavor, and if you would like, feel free to ask another question.

4 0
2 years ago
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What colors form the spectrum of visible light
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Red, orange, yellow, green, blue, indigo, violet :)
3 0
3 years ago
Which of the following does not affect the apparent brightness of a star.
Zigmanuir [339]
A) how old it is :)))
3 0
3 years ago
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