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sergey [27]
2 years ago
12

When is the absorption spectrum of an electron generated

Physics
2 answers:
serious [3.7K]2 years ago
7 0
A
Excitation to a higher energy state requires energy which is absorbed from the electromagnetic waves applied.
Goshia [24]2 years ago
6 0

Answer: A. when an electron in an atom is excited to a higher energy state

Explanation:

An absorption spectrum consists of dark lines on a visible background. The dark lines indicate the wavelength which is absorbed by the electron to jump from lower energy state to higher energy state.

Electron requires energy to jump to higher state. Specific wavelength is absorbed by the electron which appears as dark line. This wavelength is equivalent to energy difference between the two levels the electron is jumping.

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We can calculate the force that the atmospheric pressure produces on a surface. Consider a living room that has a 4.0m×5.0m floo
qaws [65]

Answer:

Force, F=2.02\times 10^6\ N

Explanation:

It is given that,

Length of the room, l = 4 m

breadth of the room, b = 5 m

Height of the room, h = 3 m

Atmospheric pressure, P=1\ atm=101325\ Pa

We know that the force acting per unit area is called pressure exerted. Its formula is given by :

P=\dfrac{F}{A}

F=P\times l\times b

F=101325\times 4\times 5

F=2.02\times 10^6\ N

So, the total force on the floor due to the air above the surface is 2.02\times 10^6\ N. Hence, this is the required solution.

4 0
2 years ago
The force of earth’s gravity is 10N downward. What us the acceleration of a 15kg backpack if lifted with a a 15N force?
Anuta_ua [19.1K]

Answer:

F-F(gr) = ma

a= {F-F(gr)}/m =

=(15-10)/15=0.33 m/s² (upward)

5 0
3 years ago
How much rope would need to be pulled through a pulley with a mechanical advantage of 2 to lift a load 4 ft?
blondinia [14]
8 feet of rope is needed.
8 0
2 years ago
Read 2 more answers
if u connect 3 resistors, having values 2ohm, 3ohm, 5ohm in parallel, will the value of total resistance of will be 2ohm or grea
Tju [1.3M]
<span>If u want only WHether the total resistance is less than 2 or less than 5 or more than 5 ohms:  there is a Simple way.

When you connect resistances in parallel, resultant resistance is always smaller than all of them. So it is less than 2 ohms</span>.

4 0
3 years ago
Read 2 more answers
A 20 N force pulls to the right and friction pulls 5 N. If the mass is 5 kg, find acceleration.​
Slav-nsk [51]

Answer:

Explanation:

Force - frictional Force = m * a

20N - 5N = 5 * a

15N = 5*a

15N / 5 = a

a = 3 m/s^2

You should note a couple of things.

1. The frictional Force always opposes the direction of motion. In this case it is minus and the 20 N is plus. It makes the acceleration less. If the friction force was not there then 20 N = m * a

20N = 5 kg * a

a = 20/5

a = 4 m/s^2.

7 0
2 years ago
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