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sertanlavr [38]
3 years ago
14

The air in your classroom has

Physics
1 answer:
mel-nik [20]3 years ago
8 0
D.) all of the above
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What is the wavelength (in nm) of radiation that has an energy content of 1.0x10^2 kJ/mol?
hammer [34]
<span>Energy = h nu, where nu is the frequency
h = 6.63 x 10^-34 J-s, Planck's constant
So nu = E/h = 1 x 10^5 J /h = 0.15 x 10^29 / s
nu lambda = c, the speed of light.
lambda = wavelength = c / nu =3 x 10^8 / 0.15 x 10^29 = 20 x 10^-21 m.

this can possibly be a gamma ray. Gamma rays are very penetrating. It's both matter and an energy. They are electromagnetic radiation that results from a radioactive material. 

</span><span>
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7 0
3 years ago
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Plz help An X-ray technician will place a lead cloth over parts of your body when taking an X-ray to protect your cells from bei
gayaneshka [121]
Letter d. Hope it helps.
6 0
4 years ago
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**URGENT PLEASE HELP**
nalin [4]

Answer:

This depends on what angle they are approaching each other before they collided.The two simple cases are if they are running in the same direction or opposite direction from each other. For either case, use the conservation of momentum equation to solve: M_total*V_result = M1*V1 + M2*V2

Explanation:

Here are two possible solutions.

Head-on collision: M1=78, V1=8.5, M2=72, V2=-7.5 (that's negative because he's running the other way), M_total = 78+72 = 150, so V_result = (78*8.5 - 72*7.5)/150 = 0.82 m/s. Sanity check, they weigh about the same and so most of their velocity should cancel out.

Running the same way: change the sign of V2 to positive so V_result = (78*8.5 + 72*7.5)/150 = 8.02 m/s. Sanity check, they weigh about the same and the resultant speed is between the two starting velocities.

<em>hope it helps:)</em>

7 0
4 years ago
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A 1,600 kg car is traveling with a speed of 20 m/s. Find the net force that is required to bring the car to a halt in a distance
Pie
256N. I love physics so.... yerp
4 0
4 years ago
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A student uses a meter to measure 120 coulombs flowing through a circuit in 60 seconds. what is the current in this circuit?
Keith_Richards [23]

A student uses a meter to measure 120 coulombs flowing through a circuit in 60 seconds. The electric current in this circuit will be  2 A

Current is a flow of electrical charge carriers, usually electrons or electron-deficient atoms. The common symbol for current is the uppercase letter I. The standard unit is the ampere, symbolized by A.

current = charge / time

given

time = 60 seconds

charge = 120 Coulombs

current = Q / T = 120 / 60 = 2 A

To learn more about electric current here

brainly.com/question/12791045

#SPJ4

3 0
2 years ago
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