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3 years ago

The temperature in a room is 56 degrees Celsius, what would the velocity of sound wave be as temperature?

Physics

1 answer:

Minchanka [31]3 years ago

5 0

Answer:

364.6 Hz

Explanation:

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An electric drill transfers some energy wastefully. Aside from heat, what else carries the energy that it transfers wastefully?

earnstyle [38]

Sound and thermal/ heat energy.

Explanation:

Electric drill use electrical energy to convert it into kinetic, but there are some energy waste during the conversion in the form of sound and thermal caused by electric motor.

3 0

3 years ago

How much energy is created when there is 110 W of<br> power over 30s?

Makovka662 [10]

Answer:

3300 J

Explanation:
P = Q/t

Q = Pt = 110 * 30 = 3300 J

5 0

2 years ago

A car's acceleration is 3m/s2. If the car started at rest and it only took 10s for the car to reach this acceleration, what is t

Grace [21]

Answer:

30m/s

Explanation:

From law of motion equation

Vf= Vi + at

Where Vf= final velocity

Vi= initial velocity=0(the car started at rest)

a= acceleration= 3m/s2

t= time= 10s

Then substitute into the equation to get the final velocity.

Vf= 0+(10×3)

Vf= 30m/s

Hence, the car's final velocity is 30m/s

5 0

3 years ago

It is desired to construct a solenoid that will have a resistance of 4.10 Ω (at 20°C) and produce a magnetic field of 4.00 ✕ 10^

Nikolay [14]

Answer:

Part a)

$N = 754 turns$

Part b)

$L = 0.376 m$

Explanation:

Resistance of the solenoid is given as

R = 4.10 ohm

now we have

$R = \rho \frac{L}{A}$

here we know that

$\rho = 1.7 \times 10^{-8} ohm-m$

$A = \pi r^2 = \pi (\frac{0.5 \times 10^{-3}}{2})^2$

$A = 1.96 \times 10^{-7} m^2$

now from above formula

$4.10 = (1.7 \times 10^{-8})\frac{L}{1.96 \times 10^{-7}}$

$L = 47.35 m$

Part a)

now we know that it is wounded over the solenoid

so here we can say

$N(2\pi R) = L$

$N(2 \pi (0.01)) = 47.35$

$N = 754 turns$

Part b)

now length of solenoid is given as

$L = N(diameter\: of\: the\: wire)$

$L = 754(0.5 \times 10^{-3})$

$L = 0.376 m$

6 0

3 years ago

Read 2 more answers

If a solid metal sphere and a hollow metal sphere of equal diameters are each given the same charge, the electric field (E) midw

olga55 [171]

Answer:

C. zero for both

Explanation:

In case of solid metal sphere , when it is given any charge , all the charges are transferred on the surface and within surface no charge exists . In case of hollow metal sphere , all charges reside on surface . In this way , in both solid and hollow sphere , all charge reside on the surface and no charge resides inside it . Hence due to absence of any charge inside , there is no electric field inside the sphere in both the cases .

Hence in both the case electric field is zero .

option C is correct .

8 0

3 years ago