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dybincka [34]
3 years ago
15

A piece of wood is floating in a bathtub. A second piece of wood sits on top of the first piece, and does not touch the water. I

f the top piece is taken off and placed in the water, what happens to the water level in the tub?
Physics
1 answer:
Mashutka [201]3 years ago
6 0

Answer:

the water level remains same

Explanation:

This can be explained by Archimedes's principle which says that the wood will sink if weight of wood is more than the weight of the water displaced with weight equal to the water displaced otherwise the wood will float.

Therefore, buoyancy or the buoyant force is the same as the weight of wood, the weight of the water displaced by wood is also the same as that of the weight of wood.

Thus, we can see that the weight of the wood remains same and so is the level of water.

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How does freezing and evaporation affect salinity?
Gnoma [55]
The answer is C, because the water molecules are evaporating and the salt molecules are staying the same.
8 0
2 years ago
rocks move trough the rock cycle through uplift,folding,and faulting cased by movements of the earth´s________
garik1379 [7]
Tectonic plates and convection cells move tectonic plates
4 0
3 years ago
A spring of force constant 1500 Nm-l is acted
olchik [2.2K]

Answer:

1.876 J

Explanation:

First, let’s calculate the compression of the spring from the Hooke’s law:

F=kx,

here, F=75 N is the force acted on the spring, k=1500 N⁄m is the force constant of the spring, x is the compression of the spring.

Then, we get:

x=F/k=(75 N)/(1500 N/m)=0.05 m.

Finally, we can find the potential energy stored in the spring:

PE=1/2 kx^2=1/2∙1500 N/m∙(0.05 m)^2=1.875 J.

correct my answer if it's wrong ^^

7 0
3 years ago
a box has a momentum of 1.30 kg*m/s to the right. a 12.8 N force pushes it to the right for 0.218 s. what is the final momentum
Rufina [12.5K]

Answer:

4.09 kgm/s

Explanation:

Concept tested: Second Newton's law of motion

So what does the second Newton's law of motion state?

  • According to the second Newton's law of motion, the resultant force and the rate of change of momentum are directly proportional.
  • That is; F=\frac{(mVf-mVo)}{t}, where, mVf is the final momentum and mVo is the initial momentum.

In this case;

  • Force = 12.8 N
  • Initial momentum, mVo = 1.3 kgm/s
  • Time, t = 0.218 seconds

Therefore; replacing the values of the variables in the formula;

we get;

12.8N=\frac{(mVf-1.3kgm/s)}{0.218s}

(12.8N)(0.218s)=(mVf-1.3kgm/s)

2.7904+1.3=mVf

Solving for final momentum;

mVf =4.0904 kgm/s

      = 4.09 kgm/s

Therefore, the final momentum of the box is 4.09 kgm/s

5 0
3 years ago
A runner having mass of 55 kg moving at a speed of 9 m/s rounds a bend with a radius of 18 m. What is the centripetal
nikklg [1K]

Answer:

centripetal acceleration = 4.5 m/s^2 ; centripetal force = 247.5 N

Explanation:

centripetal acceleration  = v^2 / r = 9^2 / 18 = 4.5 m/s^2

centripetal force = mv^2 / r = 4.5 x 55 = 247.5 N

7 0
3 years ago
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