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ArbitrLikvidat [17]
1 year ago
5

Why does a block of plastic released under water come up to the surface of water.

Physics
1 answer:
SCORPION-xisa [38]1 year ago
7 0

A block of plastic released under water will come up to the surface of the water because the density of the plastic is less than the density of water.

<h3>What is density?</h3>

Density is the amount of mass a substance contains per its unit volume. It means the number of particles that can be packed into a unit space of that substance.

<h3>How does density determine whether an object will float or sink?</h3>

When an object is immersed in a liquid, it experiences two forces - gravitational force and an upward buoyant force called upthrust. If the density of the object is more than the density of the liquid, gravitational force will be greater than upthrust and the object will sink, but if the density of the object is less than the density of the liquid, upthrust will be greater than gravitational force and the object will float. That is why a block of plastic will come up to the surface when released under water, because it is less dense than water.

Learn more about density here:

brainly.com/question/6329108

#SPJ4

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A 110-pound person pulls herself up 4.0 feet. This took her 2.5 seconds. How much power was developed?
mrs_skeptik [129]

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2 years ago
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What is the range of wavelengths that our eyes can see on the spectrum(this is called visible light spectrum)
Nookie1986 [14]

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380 to 700 nanometers

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6 0
3 years ago
What is the magnitude of vector K ?
vovangra [49]

Answer:

Vector K = 8 m

Explanation:

The given figure shows a right angle triangle JKL. It is given that :

vector L = 10 m

vector J = 6 m

We have to find vector k. We can find it by using Pythagoras theorem. According to this theorem, the sum of squares of perpendicular and the base is equal to the square of the longest side.

L^2=K^2+J^2

K^2=L^2-J^2

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3 0
3 years ago
Let’s allow ourselves to be a little more optimistic with our bus passengers. Earlier in the movie Sandy has to make the bus jum
Roman55 [17]

Answer:

25.71486 seconds

Explanation:

t = Time taken

u = Initial velocity = 60 mph

v = Final velocity = 80 mph

s = Displacement = 0.5 mile

a = Acceleration

Converting to m/s

60\times \dfrac{1609.34}{3600}=26.8223\ m/s

80\times \dfrac{1609.34}{3600}=35.7631\ m/s

From equation of motion

v^2-u^2=2as\\\Rightarrow a=\dfrac{v^2-u^2}{2s}\\\Rightarrow a=\dfrac{35.7631^2-26.8223^2}{2\times \dfrac{1609.34}{2}}\\\Rightarrow a=0.34769\ m/s^2

v=u+at\\\Rightarrow t=\dfrac{v-u}{a}\\\Rightarrow t=\dfrac{35.7631-26.8223}{0.34769}\\\Rightarrow t=25.71486\ s

Time taken is 25.71486 seconds

4 0
3 years ago
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