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Sedbober [7]
3 years ago
12

If 40 N force is exerted by a box covering 2 metre square area, calculate pressure.

Physics
1 answer:
g100num [7]3 years ago
8 0
  • Force=40N
  • Area=2m^2

\\ \sf\longmapsto Pressure=\dfrac{Force}{Area}

\\ \sf\longmapsto Pressure=\dfrac{40}{2}

\\ \sf\longmapsto Pressure=20Pa

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Why does Mercury have so little gas in its atmosphere? Choose one or more: A. Its escape velocity is low. B. It has a high tempe
Slav-nsk [51]

Answer:

Option A, B, C and D

Explanation:

First to all, we need to remember something. Mercury is the first planet to our solar system, therefore, it's the closest planet to the sun. Because of this, temperatures of that planet are way too high.

Mercury has a very thin atmosphere so it barely exists. It also has a low gravity and receives large gusts of solar winds from the Sun, that's why it has high temperature, and therefore, it's escape velocity is very low too.

Of course, it's one of the smallest planets in our solar system, so,the atmosphere of Mercury is unstable and constantly shifting. As the atmosphere’s materials are being made, they are also being taken away at the uppermost layers due to solar winds. The composition of the atmosphere can also change as you move across the planet.

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3 years ago
A new ride being built at an amusement park includes a vertical drop of 126.5 meters. Starting from rest, the ride vertically dr
yan [13]

Answer:

49.79 m/s

Explanation:

Given:

Initial velocity of the roller coaster is, u=0\ m/s

Vertical drop or the displacement of the roller coaster is, y=-126.5\ m

The displacement is negative as the motion is in downward direction.

Now, as the motion is in vertical direction only, the acceleration of the roller coaster will be due to gravity acting in the downward direction.

So, the acceleration of the roller coaster is, a=g=-9.8\ m/s^2

Now, using the following equation of motion:

v^2=u^2+2ay

Where, 'v' is the velocity of the roller coaster at the bottom.

Plug in all the given values and solve for 'v'. This gives,

v^2=0^2+2(-9.8)(-126.5)\\\\v^2=2479.4\\\\v=\sqrt{2479.4}\\\\v=49.79\ m/s

Therefore, the speed of the roller coaster at the bottom of the drop is 49.79 m/s.

7 0
3 years ago
How does resonance affect the sound of instruments?
Margaret [11]

Answer: I hope i can help you today!

Explanation:

A bunch of Musical instruments have been using Resonance to make the sound louder like to amplify the instrument of their sound waves, For example- The strings that go on the Violin would be an Acoustic resonance and so is the Body of the violin cause that is where the sound waves hit to make that beautiful sound that comes out once you play the instrument!

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4 years ago
In order of fastest to slowest, how do sound waves travel through different mediums?
Nikitich [7]
Gases, liquids, solids
7 0
3 years ago
A 0.20 kg mass attached to the end of a spring causes it to stretch 3.0 cm. What is the spring constant? What is the potential e
SVEN [57.7K]

Given that the mass is m = 0.2 kg and the displacement is x = 3 cm = 0.03 m

We have to find the spring constant and potential energy.

The spring constant can be calculated by the formula

\begin{gathered} F=\text{ kx} \\ mg\text{ = kx} \\ k\text{ = }\frac{mg}{x} \end{gathered}

Here, k is the spring constant.

g = 9.8 m/s^2 is the acceleration due to gravity.

Substituting the values, the spring constant will be

\begin{gathered} k=\frac{0.2\times9.8}{0.03} \\ =\text{ 65.33 N/m } \end{gathered}

The potential energy can be calculated as

\begin{gathered} U=\frac{1}{2}kx^2 \\ =\frac{1}{2}\times65.33\text{ }\times(0.03)^2 \\ =\text{ 0.0293 J} \end{gathered}

8 0
1 year ago
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