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3 years ago

What is transmitted by all waves? energy mass matter sound

Physics

2 answers:

disa [49]3 years ago

7 0

Answer: energy

Explanation: A wave is a disturbance that transfers energy as it travels through medium.

Vikentia [17]3 years ago

3 0

Answer:

Option (1)

Explanation:

All waves can carry energy, and this energy can be high or low. The waves that carry high energy are commonly known as the high energy waves such as X-rays and gamma rays. On the other hand, those waves that can carry low energy are considered to be low-energy waves such as radio waves.

There are two types of waves that carry energy, namely the electromagnetic wave and the longitudinal waves.

In the case of electromagnetic waves, the energy is transported in the form of vibrations of both electric as well as magnetic field. Whereas, in the case of longitudinal waves such as sound waves, this energy is carried through a medium in which the sound propagates.

Thus, the correct answer is option (1).

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3 years ago

A solenoid that is 78.8 cm long has a cross-sectional area of 15.9 cm2. There are 914 turns of wire carrying a current of 8.25 A

Harlamova29_29 [7]

Answer:

(a) Energy density will be equal to $57.31J/m^3$

(b) Total energy will be equal to 0.0718 J

Explanation:

It is given that length of solenoid l = 78.8 cm = 0.788 m

Cross sectional area $A=15.9cm^2=15.9\times 10^{-4}m^2$

Number of turns of the wire N = 914

Current in the solenoid i = 8.25 A

Inductance of the wire is equal to $L=\frac{\mu _0N^2A}{l}=\frac{4\pi \times 10^{-7}\times 914^2\times 15.9\times 10^{-4}}{0.788}=2.117\times 10^{-3}H$

(b) Total energy stored in magnetic field $U=\frac{1}{2}Li^2=\frac{1}{2}\times 2.11\times 10^{-3}\times 8.25^2=0.0718J$

(a) Energy density will be equal to

$U_b=\frac{0.0718}{15.9\times 10^{-4}\times 0.788}=57.31J/m^3$

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3 years ago

A football coach sits on a sled while two of his players build their strength by dragging the sled across the field with ropes.

Jobisdone [24]

Answer:

F=507.7N

Explanation:

According to Newton's second law:

$\sum F=m.a$

in this case, the football players need to drag the coach at a constant velocity, thus means with no acceleration, so:

$\sum F=0\\\\-F_f+F_p*cos(\theta)=0\\\\$

there are 20 degrees between the two ropes that means each player exerts a force 10 degrees from the zero reference.

$F_p=2*F\\\\F=\frac{1000N}{2*cos(10)}\\\\F=507.7N$

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3 years ago

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3 years ago

Read 2 more answers

The wavelength of yellow sodium light in vacuum is approximately 6.0 x 10-7m. The frequency

Ludmilka [50]

The frequency of sodium light in vacuum is 5 × $10^{14}$ Hz.

Answer:

Option e

Explanation:

It is known that frequency of a wave is inversely proportional to the wavelength of the wave. And the proportionality constant is the speed of light in vacuum. As the speed of light in vacuum is known as 3× $10^{8}$ m/s and the wavelength of the light in vacuum is given as 6 × $10^{-7}$ m, then the frequency of the light is determined as

Frequency = Speed of light in vacuum/Wavelength of light

Frequency = $\frac{3*10^{8} }{6*10^{-7} }$

Frequency = 0.5× $10^{15}$ = 5 × $10^{14}$ Hz.

So the frequency of sodium light in vacuum is 5 × $10^{14}$ Hz.

5 0

3 years ago