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3 years ago

What happens to an electron when energy is added?

1 answer:

7 0

When an electron is hit by a photon of light, it absorbs the quanta of energy the photon was carrying and moves to a higher energy state. One way of thinking about this higher energy state is to imagine that the electron is now moving faster, (it has just been "hit" by a rapidly moving photon).

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What component of earth’s atmosphere exists entirely as a result of photosynthesis?

sashaice [31]

Answer:

brainly.com/question/11872573

Explanation:

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3 0

3 years ago

Read 2 more answers

A grandfather clock has a pendulum that consists of a thin brass disk of radius r = 13.62 cm and mass 1.199 kg that is attached

Feliz [49]

Answer:

Explanation:

Expression for time period of a pendulum is as follows

T = $2\pi\sqrt{\frac{l}{g} }$

l is length of pendulum from centre of bob and g is acceleration due to gravity

Given

Time period T = 1.583

g = 9.846

Substituting the values

1.583 = $2\pi\sqrt{\frac{l}{9.846} }$

l = $\frac{(1.583)^2\times9.846}{4\times(\frac{22}{7})^2 }$

l = .6244 m

= 62.44 cm

Length of rod = length of pendulum - radius of bob

= 62.44 - 13.62

= 48.82 cm

= .488 m

8 0

3 years ago

The mass of a hot-air balloon and its cargo (not including the air inside) is 170 kg. The air outside is at 10.0°C and 101 kPa.

scoundrel [369]

Answer:

108.37°C

Explanation:

P₁ = Initial pressure = 101 kPa

V₁ = Initial volume = 530 m³

T₁ = Initial temperature = 10°C = 10+273.15 =283.15 K

P₂ = Final pressure = 101 kPa (because it is open to atmosphere)

V₂ = Final volume = 530 m³

P₁V₁ = n₁RT₁

⇒101×530 = n₁RT₁

⇒53530 J = n₁RT₁

P₂V₂ = n₂RT₂

⇒53530 J = n₂RT₂

$\frac{m_1}{m_2}=\frac{\rho V_1}{\rho V_1-170}\\\Rightarrow \frac{m_1}{m_2}=\frac{1.244\times 530}{1.244\times 530-170}=1.347\\\Rightarrow \frac{m_1}{m_2}=1.347\\\Rightarrow \frac{n_1}{n_2}=1.347$

Dividing the first two equations we get

$1=\frac{n_1}{n_2}\frac{T_1}{T_2}\\\Rightarrow 1=1.347\frac{283.15}{T_2}\\\Rightarrow T_2=1.347\times 283.15= 381.52\ K$

∴Temperature must the air in the balloon be warmed before the balloon will lift off is 381.25-273.15 = 108.37°C

8 0

3 years ago

PLEASE HELP!! WORTH A TOTAL OF 100 POINTS!!

Serjik [45]

The last equation gives you the tension in the string on the right:

$T_2 = 2Mg - 2Ma = 2M (g-a) = \boxed{33.2 \, \mathrm N}$

4 0

2 years ago

The Olympic record for a marathon is 2.00 hour 9.00 minute 21.0 seconds if the average speed of the runner achieving this record

iren2701 [21]

(2.00 hours) x (3,600 seconds/hour) = 7,200 seconds

(9.00 minutes) x (60 seconds/minute) = 540 seconds

The record time = (7,200 + 540 + 21) = 7,761 seconds

Distance = (speed) x (time)

= (5.436 m/s) x (7,761 sec) = 42,188.8 meters
________________________________________________

The official length of the marathon run is 42,195 meters.
If we divide that by the record time in the question, we get

5.4368... m/s .

Rounded to the nearest thousandth, that's 5.437 m/s.

If the question had given the speed as 5.437 instead of 5.436 ,
then we would have calculated the distance to be

(5.437 m/s) x (7,761 sec) = 42,196.6 meters,

4.6 meters closer to the official distance than the answer we did get.

3 0

3 years ago