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dedylja [7]
3 years ago
5

Skydivers jump out of planes with only the backpacks on their backs. Of course, these packs contain the parachutes that keep sky

divers from falling to Earth too quickly.
When a skydiver opens his parachute, he suddenly stops falling so fast. What force does the parachute help supply that causes this?
A) The drag force.
B) The thrust force.
C) The friction force.
D) The force of gravity.
Chemistry
2 answers:
UkoKoshka [18]3 years ago
8 0

the force of gravity

tangare [24]3 years ago
5 0

A) the drag force is the most logical ⊂:

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Which of the following is true about the kinetic molecular theory?
velikii [3]

Answer: (B) Pressure is due to the collisions of the gas particles with the walls of the container.

Option B helps to explain the factor behind gas collision under high pressure.

Explanation: Kinetic molecular theory explains the behaviour and movement of gas particles when they are in motion. It states that gas particles are always in continuous motion and are perfectly elastic in nature.

Kinetic molecular theory can be explained using both Boyle's law and Charles's law.

•Few Assumptions of Kinetic Molecular Theory.

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8 0
3 years ago
What is the value of k, at 25 degrees Celsius
Dimas [21]
<h3>Answer:</h3>

298.15 K

<h3>Explanation:</h3>

W e are supposed to calculate the Value of K at 25°C

Assuming the value of K represent K, the question wants us to convert  degree Celsius to Kelvin.

  • To convert degrees Celsius to kelvin scale, we use the relationship;
  • Kelvin (K) = Degrees Celsius + 273.15 ; 273.5 is a constant
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In this case;

Temperature is 273.15 °c

Thus, to Kelvin scale temperature will be;

= 25°C + 273.15

= 298.15 K

Therefore, the value of K, at 25°C is 298.15 K

7 0
3 years ago
If a substance has a mass of 12.50 g and takes up 3.4 mL of space, what is the density?
miskamm [114]

Answer:

The answer is

<h2>3.68 g/mL</h2>

Explanation:

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

<h3>density =  \frac{mass}{volume}</h3>

From the question

mass of substance = 12.50 g

volume = 3.4 mL

The density of the substance is

density =  \frac{12.50}{3.4}  \\  = 3.676470588...

We have the final answer as

<h3>3.68 g/mL</h3>

Hope this helps you

7 0
3 years ago
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kobusy [5.1K]

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12. ionic charge 2-, neon.

13. ionic charge 3+, neon.

3 0
3 years ago
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7 0
3 years ago
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