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4 years ago

15

How do you calculate the volume and density of something that weighs 20 grams?

1 answer:

Nostrana [21]4 years ago

6 0

Mass divided by volume is density, while mass times density is volume. you cannot calculate density without volume and you cannot calculate volume without density.
i believe that's the answer.
oh gosh i didn't realize my middle school education involved high school stuff.

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The solar system is 25,000 light years from the center of our Milky Way galaxy. One light year is the distance light travels in

aksik [14]

Answer:

The time period of the solar system's orbit is $2.05\times10^{8}\ year$

Explanation:

Given that,

Distance = 25000 light year

Speed of light $c=3\times10^{8}\ m/s$

Speed of astronomers = 230 m/s

Suppose the orbit is circular, we need to find the time period of the solar system's orbit.

We need to calculate the time period

Using formula of time period

$t = \dfrac{d}{v}$

$t = \dfrac{2\pi r}{v}$

r = distance

t = time

v = speed

Put the value into the formula

$t=\dfrac{2\pi\times25000\times9.46\times10^{15}}{230\times10^{3}}$

$t=6.460\times10^{15}\ sec$

Time in years

$t=\dfrac{6.460\times10^{15}}{3.15\times10^{7}}$

$t=2.05\times10^{8}\ year$

Hence, The time period of the solar system's orbit is $2.05\times10^{8}\ year$

4 0

3 years ago

How much energy is stored in a spring with a spring constant of 390 N/m if the spring is compressed a distance of 0.45 m from it

masya89 [10]

F=-ks
F=-(390)(.45)
F=-175.5 N

Work=force x displacement
Work= 175.5(0.45)
Work= 78.98 J

Work = ∆E =78.98 J

Answer=79J (first option)

4 0

3 years ago

What rule does static electricity follow

Luba_88 [7]

Static electricity works when there is an imbalance of positive and negative charges, and thus causes a little spark.

3 0

3 years ago

Spiral galaxys appear bluish due to the abundance of

RSB [31]

Spiral galaxies are still undergoing star formation

8 0

3 years ago

frez [133]

B 20 m/s
It should go to 100 that fast nor 40

4 0

3 years ago