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elena55 [62]
3 years ago
12

A loop rests in the plane of a page of textbook while a magnetic field is directed into the page. A clockwise current is induced

Check all that apply. when the magnetic field is tilted so it is no longer perpendicular to the page. when the magnetic field gets stronger. when the loop is moved sideways across the page. when the size of the loop decreases.
Physics
1 answer:
Sunny_sXe [5.5K]3 years ago
8 0

Answer:

When the magnetic field is tilted so it is no longer perpendicular to the page.

When the magnetic field gets stronger.

When the size of the loop decreases.

Explanation:

According to the Faraday-Lenz law, the change of the magnetic flux over time causes an induced current, this flux is given by:

\Phi_B=BScos\theta

Therefore, there will be a variable magnetic flux, when the magnitude of the magnetic field (B) changes over time, when the area of the loop (S) changes over time and / or when the angle (\theta) between the field and the surface vector changes over time.

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A 64 kg cross-country skier glides over snow. Thecoefficient
BaLLatris [955]

Answer:

The distance traveled by the skier is 5.309 km

Solution:

As per the question:

Mass of the skier, m = 64 kg

Coefficient of friction between the ski and the snow, \mu_{k} = 0.50

Mass of snow, M = 5.0 kg

Now,

To calculate the distance, 's' traveled by the skier, in order to melt 5.0 kg of snow:

We know that:

f = \mu_{k}N

where

\mu_{k} = coefficient of friction

N = Normal Reaction

N = mg

Thus

f = \mu_{k}mg                           (1)

Also,

fs = ML_{f}                                  (2)  

where

L_{f} = 3.33\times 10^{5}\ J/kg = Latent Heat of fusion

Thus from eqn (1) and (2):

s = \frac{ML_{f}}{\mu_{k}mg}

s = \frac{5\times 3.33\times 10^{5}}{0.50\times 64\times 9.8}

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5 0
3 years ago
A 14-Ω coffee maker and a 14-Ω frying pan are connected in series across a 120-V source of voltage. A 20-Ω bread maker is also c
Ann [662]

Answer:

The total current supplied by the source of voltage = 10.29 A

Explanation:

We have a 14-Ω coffee maker and a 14-Ω frying pan are connected in series.

Effective resistance = 14 + 14 = 28Ω

Now we have 28Ω and 20Ω in parallel

Effective resistance

             R=\frac{28\times 20}{28+20}=11.67\Omega

So we have resistor with 11.67Ω in a 120 V source of voltage.

We have equation V = IR

Substituting

               120 = I x 11.67

                 I = 10.29 A

The total current supplied by the source of voltage = 10.29 A

8 0
3 years ago
A dentist’s drill starts from rest. After 1.46 sof constant angular acceleration, it turns at arate of 27000 rev/min.Find the dr
Black_prince [1.1K]

Answer:

616.3 rad/s²

Explanation:

Given that

t= 1.46 s

Initial angular velocity ,ωi = 0 rad/s

Final angular velocity ωf= 27000 rev/min

Angular speed in the rad/s given as

\omega_f=\dfrac{2\pi N}{60}\ rad/s

Now by putting the values

\omega_f=\dfrac{2\times 27000}{60}\ rad/s

ωf=900 rad/s

We know that (if acceleration is constant)

ωf=ωi + α t

α=Angular acceleration

900 = 0 + α x 1.46

\alpha=\dfrac{900}{1.46}\ rad/s^2\\\alpha=616.43\ rad/s^2

Therefore the acceleration will be 616.3 rad/s²  

4 0
3 years ago
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PtichkaEL [24]

Answer: If the magnification is positive, the image is upright compared to the object; if m is negative, the image is inverted compared to the object.

(I think, I was also stuck on this question for a bit)

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Answer:

slider,topspin,hook,curveballs

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3 years ago
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