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4 years ago

When an atom is in excited state emits a photon of radiation, the energy of the photon is equal to the?

Physics

1 answer:

Mrac [35]4 years ago

6 0

It's equal to the difference in energy between the atom's excited state and its final state.

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Suppose that a block is pulled 16 meters across a floor. What amount of work is done if the force used to drag the block is 22 N

LenKa [72]

Work done = Force * Displacement

= 22N * 16m

= 352 Nm

Work done = 352 Joules.

3 0

3 years ago

Read 2 more answers

(a) In the baggage claim area of an airport, a particular baggage carousel is shaped like a section of a large cone, steadily ro

Tom [10]

Answer:

Part a)

$F_f = 107.8 N$

Part b)

$\mu = 0.415$

Explanation:

Part a)

Time period of one revolution is given as

T = 42 s

now the angular speed of the belt is given as

$\omega = \frac{2\pi}{T}$

$\omega = \frac{2\pi}{42}$

$\omega = 0.15 rad/s$

Now at rest position the force along the surface of carousel must be constant

so we will have

$mgsin\theta + m\omega^2 r cos\theta = F_f$

$30(9.81)sin20.5 + 30(0.15^2)(7.46)cos20.5 = F_f$

$F_f = 107.8 N$

Part b)

New Time period of one revolution is given as

T = 30 s

now the angular speed of the belt is given as

$\omega = \frac{2\pi}{T}$

$\omega = \frac{2\pi}{30}$

$\omega = 0.21 rad/s$

Now at rest position the force along the surface of carousel must be constant

so we will have

$mgsin\theta + m\omega^2 r cos\theta = F_f$

$30(9.81)sin20.5 + 30(0.21^2)(7.94)cos20.5 = F_f$

$F_f = 112.9 N$

Also we know that in perpendicular direction also force is balanced

$F_n + m\omega^2 r sin\theta = mgcos\theta$

$F_n = mgcos\theta - m\omega^2 r sin\theta$

$F_n = 30(9.81)cos20.5 - 30(0.21)^2(7.94)sin20.5$

$F_n = 272 N$

now for friction coefficient we will have

$F_f = \mu F_n$

$112.9 = \mu 272$

$\mu = 0.415$

8 0

3 years ago

Why is there less air pressure at higher altitudes?

olganol [36]

Answer:

As ailtitudes rises air pressure drops ...... As altitude increases , the amount of gas molecules in the air decreases - so the air becomes less dense than air nearer to the sea level. So there is less air pressure at high altitudes

3 0

3 years ago

Carbon forms four ionic bonds in its compounds. t or f

Stells [14]

False, Carbon usually forms four covalent bonds.

8 0

4 years ago

"a ________ is a mushroom-shaped pluton that forms by injecting magma between sedimentary strata, forcing the upper layers to ar

Tamiku [17]

Laccolith is a mushroom-shaped pluton that forms by injecting magma between sedimentary strata, forcing the upper layers to arch upward.

3 0

4 years ago

Read 2 more answers