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d1i1m1o1n [39]
3 years ago
10

Can someone help me with this?

Physics
1 answer:
oksian1 [2.3K]3 years ago
5 0

Answer:

Yes

Explanation:

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A 1-m-tall barrel is closed on top except for a thin pipe extending 4.2 m up from the top. When the barrel is filled with water
Dmitry_Shevchenko [17]

Answer:

P = 52 kPa

Explanation:

Hidrostatic pressure is defined as the product of the height of liquid (h) by its specific weight (ρ) and by the acceleration of gravity (g).

In the first scenario, the atmospheric pressure is:

10,000 = \rho g h_{1}\\10,000 = \rho g*1\\\rho g = 10,000

In the second scenario, h = 4.2 + 1 m. Therefore, the pressure at the bottom of the barrel is:

P= \rho g h_{2}\\P= 10,000*5.2\\P=52,000\\P=52kPa

The pressure on the bottom when water is added to fill the pipe to its top is 52 kPa.

4 0
3 years ago
A particle at 9 AM is moving towards the east at 4 ms At 12 noon, it changes its velocity and starts moving towards the north un
nexus9112 [7]

Answer:

Explanation:

Acceleration is the time rate of change of velocity.

Acceleration and velocity are vectors

If east and north are the positive directions, the east moving vector is reduced to zero and the north moving vector increases from zero to 4 m/s.

There are 3 hours or 10800 seconds between 10 AM and 1 PM

a1 = √((-4)² + 4²) / 10800 = (√32) / 10800 m/s² ≈ 4.2 x 10⁻⁴ m/s²

There are 14400 seconds between 10 AM and 2 PM

The velocity changes are still the same

a2 = √((-4)² + 4²) / 10800 = (√32) / 14400 m/s² ≈ 3.9 x 10⁻⁴ m/s²

7 0
3 years ago
In order for work to be done, what must be true?
Amiraneli [1.4K]

Answer:

option c

Explanation:

Work is said to be done when a force moves a body over a distance, in the direction of force applied.

Work done = force x distance (in the direction of the force)

Therefore work = force x displacement

As displacement is distance in a specific or specified direction.

I hope this was helpful, Please mark as brainliest

5 0
3 years ago
The blocks shown in the pictures below are all made of wood. Which car will move the fastest?
Ne4ueva [31]

Answer:

The one with the less mass

Explanation:

7 0
3 years ago
A 10-kilogram bicycle is traveling at a speed of 2m/s. what is the bike's kinetice energy?
madam [21]
The kinetic energy of an object of mass m moving with speed v is given by:
K= \frac{1}{2}mv^2
For the bicycle in our problem, m=10 kg and v=2 m/s, so the kinetic energy is
K= \frac{1}{2}(10 kg)(2 m/s)^2=20 J
4 0
3 years ago
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