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Elza [17]
3 years ago
13

How much energy is consumed by a 12 W night light left on for 10 hr?

Physics
1 answer:
shutvik [7]3 years ago
6 0

Answer:

Energy consumed is 0.00033 Joules.

Explanation:

the formula of Energy is:

Energy = power/ time.

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Um aluno pretende construir um aquecedor usando um enrolamento de fio. Experimenta e verifica que não
Vlad1618 [11]

Answer:

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6 0
3 years ago
Ch 27 HW Exercise 27.12 10 of 20 Constants A horizontal rectangular surface has dimensions 2.80 cm by 3.15 cm and is in a unifor
deff fn [24]

Answer:

Magnetic field, B = 0.88 T

Explanation:

It is given that,

The dimension of rectangular surface is 2.80 cm by 3.15 cm. The area of rectangular surface is, A=8.82\ cm^2=0.000882\ m^2

Angle between the uniform magnetic field and the horizontal, \theta=31

Magnetic flux, \phi=4\times 10^{-4}\ Wb

Let B is the magnitude of magnetic field in which the rectangular surface is placed. It is given by :

\phi=BA\ cos\theta

\theta is the angle between magnetic field and the area

Here, \theta=90-31=59^{\circ}

B=\dfrac{\phi}{A\ cos\theta}

B=\dfrac{4\times 10^{-4}}{0.000882\times cos(59)}

B = 0.88 T

So, the magnitude of magnetic field is 0.88 T. Hence, this is the required solution.

7 0
3 years ago
LED lights will only work if the current is flowing in one direction. Which type of current would be best for powering an LED li
klasskru [66]

Answer:

c

Explanation: i took the same text and got a 90

6 0
3 years ago
Read 2 more answers
A driver of a car traveling at 14.6 m/s applies the brakes, causing a uniform deceleration of 1.2 m/s2. How long does it take th
vfiekz [6]

Recall that

v_f=v_0+at

It takes the car about 3.2 s to reduce its speed from 14.6 to 10.8 m/s, since

10.8\,\dfrac{\mathrm m}{\mathrm s}=14.6\,\dfrac{\mathrm m}{\mathrm s}+\left(-1.2\,\dfrac{\mathrm m}{\mathrm s^2}\right)t\implies t=3.2\,\mathrm s

Next, recall that

\Delta x=x_f-x_0=\dfrac{v_f+v_0}2t

Then the car undergoes a displacement of about 41 m, since

\Delta x=\dfrac{10.8\,\frac{\mathrm m}{\mathrm s}+14.6\,\frac{\mathrm m}{\mathrm s}}2(3.2\,\mathrm s)\implies\Delta x=41\,\mathrm m

6 0
3 years ago
Why isn't space expanding within systems such as our solar system or the milky way?
mezya [45]
The main reason for this is gravity. Gravity between objects in our solar system and milky way is strong enough to counteract this expansion. Hope it helps.
4 0
3 years ago
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