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3 years ago

Electrical energy can be produced in many

Physics

2 answers:

adoni [48]3 years ago

6 0

Answer:

Explanation:

Energy is created by movement in atoms

electric energy is movement specifically of electrons

mr Goodwill [35]3 years ago

5 0

Answer:

c the answer will be c

Explanation:

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Between which two planets is the gravitational attraction the weakest?

raketka [301]

planet B and D have the weakest gravitational attraction.

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3 years ago

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Diffraction of sound waves is demonstrated when sound waves with a frequency of 1300 Hz from a distant source are diffracted thr

Tresset [83]

Answer:

39.05°

Explanation:

As we know that, the diffraction is the phenomena of bending of light when it passes through an obstacle.

Mathematically,

$dsin\theta=n\lambda$

Here, d is slit width, $\lambda$ is the wavelength, n is the order, $\theta$ is the angle.

Given that, d is 84 cm, n is 2, and the wavelength can be calculated as,

$\lambda=\frac{c}{f}$

Here, c is the speed of sound and f is the frequency of sound wave.

Here, c is 343 m/s and f is 1300 Hz,

Therefore,

$\lambda=\frac{343 m/s}{1300 Hz}\\\lambda=0.264m$

Recall diffraction equation in term of $sin\theta$ .

$sin\theta=\frac{n\lambda}{d}$

Put all the variables.

$sin\theta=\frac{2\times 0.264 m}{84 cm}\\sin\theta=\frac{2\times 0.264 m}{0.84 m}\\\theta=39.05^{\circ}$

Therefore, it is the required angle between the first 2 order of diffraction.

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3 years ago

Choose the way that machine may change force...<br> Doc Below

Serhud [2]

fjfjfj

Explanation:

rufifiriirifieif

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3 years ago

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What is the largest area of specialization in psychology

Sindrei [870]

Answer:clinical psychology

Explanation:

The largest area of specialization in psychology is clinical psychology

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4 years ago

A simple pendulum makes 120 complete oscillations in 3.00 min at a location where g 5 9.80 m/s2. Find (a) the period of the pend

choli [55]

Answer:

(a) 1.5 second

(b) 0.56 m

Explanation:

Pendulum makes 120 oscillations in 3 min that means in 180 seconds

time taken by the pendulum to complete one oscillation is called time period.

(a) So, the time period is 180 / 120 = 1.5 second

T = 1.5 second

Thus, the time period of the pendulum is 1.5 second.

(b) g = 9.8 m/s^2

The formula for the time period is given by

$T =2\pi \sqrt{\frac{L}{g}}$

Where, L be the length of pendulum

$1.5 =2\times 3.14 \sqrt{\frac{L}{9.8}}$

$0.057= {\frac{L}{9.8}}$

L = 0.56 m

Thus, the length of the pendulum is 0.56 m .

6 0

3 years ago