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3 years ago

How are forces described?

2 answers:

7 0

In simple terms a force is what makes anything do move or stay still. Some forces are contact forces and some are non contact. Hope this helps.

Ad libitum [116K]3 years ago

3 0

Answer:

a force is any interaction that is unchallenged will change the motion of an object you might have heard of the push pull example

Explanation:

The equation to find force is

force = mass * acceleration or F = M * A

Force never creates motion!! although motion can occur

force is measured in the SI unit of newtons

a good example would be kicking a football when the foot ball is kicked your foot is interacting with the ball the ball is the object and your foot is the motion that is pushing on the ball which will then make the ball accelerate in the air so i think to find the force of the ball you take the mass of the object in this case the ball and multiply it by it acceleration or the change in its velocity to get force

idk i really hope this helps T^T

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2. Hydrogen gas at a temperature of 22.0°C that is confined in a 5.00L cylinder exerts a pressure of 4.20atm. If the gas is rele

Umnica [9.8K]

Answer: n∗R=22+273.15/4.2∗5n

P2=n∗R∗T2/V2=n∗R∗33.6+273.15/10

Explanation:

4 0

3 years ago

What is the SI base unit for length?

sp2606 [1]

The SI base unit for length is meter.

In order to make smaller measurements, you can use the centi-, milli-, micro-, etc. prefixes.

When you want to reference larger measurements, you can use the kilo-, mega-, giga- and prefixes such as those.

5 0

3 years ago

In which of the following compounds does the carbonyl stretch in the IR spectrum occur at the lowest wavenumber?

klio [65]

Answer:

a. Cyclohexanone

Explanation:

The principle of IR technique is based on the vibration of the bonds by using the energy that is in this region of the electromagnetic spectrum. For each bond, there is a specific energy that generates a specific vibration. In this case, you want to study the vibration that is given in the carbonyl group C=O. Which is located around 1700 cm-1.

Now, we must remember that the lower the wavenumber we will have less energy. So, what we should look for in these molecules, is a carbonyl group in which less energy is needed to vibrate since we look for the molecule with a smaller wavenumber.

If we look at the structure of all the molecules we will find that in the last three we have heteroatoms (atoms different to carbon I hydrogen) on the right side of the carbonyl group. These atoms allow the production of resonance structures which makes the molecule more stable. If the molecule is more stable we will need more energy to make it vibrate and therefore greater wavenumbers.

The molecule that fulfills this condition is the cyclohexanone.

See figure 1

I hope it helps!

4 0

4 years ago

To what volume should 5.0 g of KCl be diluted in order to prepare a 0.15 M solution? L

Nesterboy [21]

Answer:0.45L

Explanation:

molarity=0.15M

Mass=5g

No of moles=mass ➗ molecular mass

Molecular mass of KCL=39.0983x1+35.453x1

Molecular mass of KCL=74.5513

No of moles=5 ➗ 74.5513

No of moles=0.067

Volume in liters=No of moles ➗ molarity

Volume in liters=0.067 ➗ 0.15

Volume in liters=0.45L

7 0

3 years ago

Oxygen has 8 electrons. Is it chemically inert or reactive?

liraira [26]

Answer:

Reactive

Explanation:

8 0

3 years ago

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