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3 years ago

why can you say that the big bang and spreading of the universe is similar to a stone hitting the surfacec of the water

Physics

2 answers:

UNO [17]3 years ago

8 0

They both start being hit and they also spread in all directions

user100 [1]3 years ago

4 0

When a stone hits the water, the water vibrates causing vibrates that move outwards from where the water was hit.

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A reciprocating compressor is a device that compresses air by a back-and-forth straight-line motion, like a piston in a cylinder

Stella [2.4K]

Answer:

The temperature change per compression stroke is 32.48°.

Explanation:

Given that,

Angular frequency = 150 rpm

Stroke = 2.00 mol

Initial temperature = 390 K

Supplied power = -7.9 kW

Rate of heat = -1.1 kW

We need to calculate the time for compressor

Using formula of compression

$\terxt{time for compression}=\text{time for half revolution}$

$\terxt{time for compression}=\dfrac{1}{2}\times T$

$\terxt{time for compression}=\dfrac{1}{2}\times \dfrac{1}{f}$

Put the value into the formula

$\terxt{time for compression}=\dfrac{1}{2}\times \dfrac{1}{150}\times60$

$\terxt{time for compression}=0.2\ sec$

We need to calculate the rate of internal energy

Using first law of thermodynamics

$U=Q-W$

$\dfrac{\Delta U}{\Delta t}=\dfrac{\Delta Q}{\Delta t}-\dfrac{\Delta W}{\Delta t}$

Put the value into the formula

$\dfrac{\Delta U}{\Delta t}=(-1.1)-(7.9)$

$\dfrac{\Delta U}{\Delta t}=6.8\ kW$

We need to calculate the temperature change per compression stroke

Using formula of rate of internal energy

$\dfrac{\Delta U}{\Delta t}=\dfrac{nc_{v}\Delta \theta}{\Delta t}$

$\Delta\theta=\dfrac{\Delta U}{\Delta t}\times\dfrac{\Delta t}{n\times c_{c}}$

Put the value into the formula

$\Delta \theta=6.8\times10^{3}\dfrac{0.2}{2.0\times20.93}$

$\Delta\theta=32.48^{\circ}$

Hence, The temperature change per compression stroke is 32.48°.

6 0

4 years ago

An object that is negatively charged could contain only electrons with no accompanying protons. O True False

marta [7]

Answer:

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3 years ago

1. You and your forensics team are working a crime scene of a 19 year-old female who was found in the woods behind

Helga [31]

Answer:

You could conclude the 2nd fact

Explanation:

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3 years ago

Why do scientists use the scientific method when completing experiments.

polet [3.4K]

Answer:

Scientists use the scientific method to collect measurable, empirical evidence in an experiment related to a hypothesis.

Explanation:

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3 years ago

If you graph the average velocity (y-axis) vs. the elapsed time (x-axis), what

Aleks [24]

Answer:

a diagonal line on the graph

Explanation:

the slope would be constant at an increasing rate

y=x

uniform= increasing at a constant rate

4 0

4 years ago