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barxatty [35]
3 years ago
6

Pls answer these questions I beg u!! And use the diagram for answering the questions pls help!! I will make u the BRAINLIEST!!!

Physics
1 answer:
MA_775_DIABLO [31]3 years ago
3 0
I think this is the answer:

<span>Matter can change its state because of the pressure and/or the temperature.</span>
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What about a rubber band, can it change its shape? Is it a solid?
pshichka [43]

Answer:

Yes it is a solid

Explanation:

It just has unusual properties.

Does it float when you drop it? then it is not a gas.

Does it pour into any container as water does? Then it is not a liquid.

So it's a solid.

And it can change it's shape

6 0
4 years ago
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A particle's velocity is described by the function vx = kt 2 m/s, where k is a constant and t is in s. The particle's position a
vodomira [7]

Answer:

The value of the constant k is 2

Explanation:

We have the equation of the velocity v_{x} = kt² , where k

is constant and t is the time in second

The particle's position at t_{0} = 0 is x_{0} = -9 m

The particle's position at t_{1} = 3 s is x_{1} = 9 m

We need to find the value of the constant k

The relation between the velocity and the displacement in a particular

time is x = \int\ {v_{x} } \, dt

Remember in integration we add power by 1 and divide the expression

by the new power

→ x = \int\ {kt^{2} } \, dt=\frac{1}{3}kt^{3}+c

c is the constant of integration to find it substitute the initial value of x

and t in the equation of x

→ t_{0} = 0 , x_{0} = -9 m

→ -9 = \frac{1}{3} k (0)³ + c

→ -9 = c

Substitute the value of c in the equation of x

→ x = \frac{1}{3} k t³ - 9

To find k substitute the values of  t_{1} = 3 s , x_{1} = 9 m

→ 9 = \frac{1}{3} k (3)³ - 9

→ 9 = \frac{1}{3} (27) k - 9

→ 9 = 9 k - 9

Add 9 to both sides

→ 18 = 9 k

Divide both sides by 9

→ k = 2

<em>The value of the constant k is 2</em>

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The number and units. An example would be 3cm or 4kg.
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