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3 years ago

Which states of matter are significantly compressible?

1 answer:

5 0

Hello.

The gaseous state is the more compressible state, because it has the volume of its container.

The liquid state is virtually incompressible, and the solid state compression is very small.

The plasma is another state that has high compression, but in this case the matter is not bound(we don't have the proton in the core of the atom)

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A train travels 79 kilometers in 2 hours, and then 77 kilometers in 3 hours. What is its average speed?

koban [17]

Average speed=total distance traveled/time. Total distance=the sum of the two short distances=79*2+77*3=389 km. Total time used to travel is 2+3=5 hr. Average speed is 389/5=77.8 km/hr.

4 0

3 years ago

Which of these are part of the electromagnetic spectrum?

bazaltina [42]

Answer: A, C, E

Explanation:

Gamma rays, Microwaves, and Radio waves

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2 years ago

Read 2 more answers

A starship travels to a planet that is 20 light years away. The astronauts stay on the planet for 2.0 years before returning at

ad-work [718]

Answer:

astronauts age is 32 years

correct option is e 32 years

Explanation:

given data

travels = 20 light year

stay = 2 year

return = 52 years

to find out

astronauts aged

solution

we know here they stay 2 year so time taken in traveling is

time in traveling = ( 52 -2 ) = 50 year

so it mean 25 year in going and 25 years in return

and distance is given 20 light year

so speed will be

speed = distance / time

speed = 20 / 25 = 0.8 light year

so time is

time = $\frac{t}{\sqrt{1-v^2} }$

time = $\frac{25}{\sqrt{1-0.8^2} }$

time = 15 year

so age is 15 + 2 + 15

so astronauts age is 32 years

so correct option is e 32 years

4 0

3 years ago

What is the definition of a parasite?

saul85 [17]

An organism that lives in or on an organism of another species (its host) and benefits by deriving nutrients at the other's expense.

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3 years ago

How can the sun have both a brightness of -26.73 and 4.83? Explain what these numbers mean.

Assoli18 [71]

The Sun has an "absolute magnitude" of 4.83 and an "apparent" magnitude of -26.8. (Which is the difference between the numbers). Scientists use what is know as "Absolute" Magnitude to help them understand and compute how bright a star really is. The "absolute" magnitude of an object, such as a star, equals how bright that object would look if it were 10 parsecs, or 32.6 light years away from the Earth.

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3 years ago