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4 years ago

Which statememt describes gravity? Select three options

1 answer:

8 0

Gravity is a force which tries to pull two objects toward each other. Anything which has mass also has a gravitational pull. The more massive an object is, the stronger its gravitational pull is. Earth's gravity is what keeps you on the ground and what causes objects to fall.

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Use Cell Membrane in a sentence

Varvara68 [4.7K]

The Cell membranes job is to protect the cell from its surroundings by controlling the movement of substances in and out of the cells

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3 years ago

Calculate the density of 30 cubic centimeters of liquid that has a mass of 120 grams.

-BARSIC- [3]

Answer:

Explanation:

The density of a substance can be found by using the formula

$density = \frac{mass}{volume} \\$

From the question we have

$density = \frac{120}{30} = \frac{12}{3} \\$

We have the final answer as

Hope this helps you

8 0

3 years ago

What type of wave does not need matter to carry energy?<br> The answer is Electromagnetic

Aleks04 [339]

Answer:

Electromagnetic

Explanation:

Electromagnetic waves differ from mechanical waves in that they do not require a medium to propagate. This means that electromagnetic waves can travel not only through air and solid materials, but also through the vacuum of space.

3 0

3 years ago

A pump contains 1.5 L of air at 175 kPa. You draw back on the piston of the pump, expanding the volume until the pressure reads

Tresset [83]

Answer:

$\large \boxed{\text{86.8 L}}$

Explanation:

The temperature and amount of gas are constant, so we can use Boyle’s Law.

$p_{1}V_{1} = p_{2}V_{2}$

Data:

$\begin{array}{rclrcl}p_{1}& =& \text{0.579 atm}\qquad & V_{1} &= & \text{150 L} \\p_{2}& =& \text{1.00 atm}\qquad & V_{2} &= & ?\\\end{array}$

Calculations:

$\begin{array}{rcl}0.579 \times 150 & =& 1.00V_{2}\\86.85 & = & 1.00V_{2}\\V_{2} & = &\dfrac{86.85}{1.00}\\\\& = &\textbf{86.8}\\\end{array}\\\text{The new volume of the gas is } \large \boxed{\textbf{86.8 L}}$

6 0

4 years ago

Is HBr a polar compound? Why or why not?

LenKa [72]

Yes, it is a Compound.

They both comprehend with the atoms of each sourse!

7 0

4 years ago

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