K:potassium
Cu:copper
Cl: chlorine
Helium is lighter than air from the lungs.
Explanation:
A balloon filled with the air from lungs will sink to the ground but a balloon filled with Helium floats because helium is lighter than air.
Air is a mixture of many gases.
The air from the lungs is predominantly made up of carbon dioxide and water vapor.
- Gram per mole of carbon dioxide is 44. Water vapor is 18.
- Compared to helium which is 4, we see that the gas is lighter.
- Since the gas is lighter, it will float in air.
- The main component of air around us is nitrogen gas with a gram per mole of 28.
- A balloon filled with more of air from the lungs weigh more than that will filled air around and even far more than helium gas.
- This will cause a helium filled balloon to float.
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Density brainly.com/question/1698555
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one leaves green marks on your finger and one doesnt
Answer:
a = - 3.14[m/s^2]
Explanation:
To solve this problem we must use the following kinematic equation:
![v_{f} ^{2}= v_{o} ^{2}+2*a*dx\\where:\\v_{f} = final velocity = 0 [m/s]\\v_{o}= initial velocity = 48.8 [m/s]\\ a = acceleration [m/s^2]\\dx = displacement [m]\\](https://tex.z-dn.net/?f=v_%7Bf%7D%20%5E%7B2%7D%3D%20v_%7Bo%7D%20%5E%7B2%7D%2B2%2Aa%2Adx%5C%5Cwhere%3A%5C%5Cv_%7Bf%7D%20%3D%20final%20velocity%20%3D%200%20%5Bm%2Fs%5D%5C%5Cv_%7Bo%7D%3D%20initial%20velocity%20%3D%2048.8%20%5Bm%2Fs%5D%5C%5C%20a%20%3D%20acceleration%20%5Bm%2Fs%5E2%5D%5C%5Cdx%20%3D%20displacement%20%5Bm%5D%5C%5C)
Now replacing:
![0 = 48.8^{2}+2*a*(378.7) \\-2381.44 = 757.4*a\\a = -3.14[m/s^2]](https://tex.z-dn.net/?f=0%20%3D%2048.8%5E%7B2%7D%2B2%2Aa%2A%28378.7%29%20%5C%5C-2381.44%20%3D%20757.4%2Aa%5C%5Ca%20%3D%20-3.14%5Bm%2Fs%5E2%5D)
The negative sign means the vehicle slows down.
Answer:
It's energy will double.
Explanation:
This is because energy, E, is related to frequency, f, by:
E = hf
Where h = Planck's constant
So, double frequency will be 2f
=> E(2f) = 2hf = 2E.
Hence, energy is doubled.
