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3 years ago

Which is the correct answer?

Physics

1 answer:

Nezavi [6.7K]3 years ago

7 0

Answer:

Point A

Explanation:

The work done by stretching or compressing a spring is given by E=1/2kx²

The potential energy is numerically equal to the work done.

This means that the higher the bigger the value of the extension, x, the higher the energy contained.

In this scenario the modulus of x is considered.

Among the given values of x the modulus of -5 is the largest.

thus it gives the highest value of energy.

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Dos masas de 8kg es tan unidas en el extremo de una varilla de aluminio de 400mm de longitud. La varilla está sostenida en su pa

enyata [817]

Answer:

The maximum frequency of revolution is 3.6 Hz.

Explanation:

Given that,

Mass = 8 kg

Distance = 400 mm

Tension = 800 N

We need to calculate the velocity

Using centripetal force

$F=\dfrac{mv^2}{r}$

Where, F= tension

m = mass

v= velocity

r = radius of circle

Put the value into the formula

$800=\dfrac{8\times v^2}{200\times10^{-3}}$

$v^2=\sqrt{\dfrac{800\times200\times10^{-3}}{8}}$

$v=4.47\ m/s$

We need to calculate the maximum frequency of revolution

Using formula of frequency

$f=\dfrac{v}{2\pi r}$

Put the value into the formula

$f=\dfrac{4.47}{2\pi\times200\times10^{-3}}$

$f=3.6\ Hz$

Hence, The maximum frequency of revolution is 3.6 Hz.

7 0

3 years ago

What is the substance through which sound travels?

Ann [662]

Answer:

Sound waves need to travel through a medium such as solids, liquids and gases. The sound waves move through each of these mediums by vibrating the molecules in the matter. The molecules in solids are packed very tightly. Liquids are not packed as tightly.

Explanation:

Hope this helped, Have a Great Day!!

4 0

2 years ago

What is the meaning of inversely proportion

-BARSIC- [3]

If two variables are inversely proportional, then when one increases, the other decreases, and vice versa. If a variable, y, is inversely proportional to a variable, x, then y = k/x, where k is the proportionality constant.

4 0

2 years ago

Read 2 more answers

A wooden block with mass 1.60 kg is placed against a compressed spring at the bottom of a slope inclined at an angle of 30.0° (p

andreyandreev [35.5K]

Answer:

The amount of potential energy that was initially stored in the spring is 88.8 J.

Explanation:

Given that,

Mass of block = 1.60 kg

Angle = 30.0°

Distance = 6.55 m