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lubasha [3.4K]
3 years ago
10

Which object absorbs the most visible light?

Physics
2 answers:
klio [65]3 years ago
4 0

Answer:

C. a black t-shirt

Explanation:

wariber [46]3 years ago
3 0
<h3><u>Answer;</u></h3>

<em>A black T-shirt </em>

<h3><u>Explanation;</u></h3>
  • <em><u>Materials can be either reflectors and absorbers of waves such as light waves, sound waves etc.</u></em> Reflectors are those materials that reflects waves, such that the waves bounces back on hitting the surface of those materials.
  • Examples of such materials are those <em><u>with smooth and shiny surfaces, while those with rough and opaque surfaces are poor reflectors of light. </u></em>Additionally, these materials that are good reflectors are poor absorbers while those that are poor reflectors are good absorbers of light.
  • <u><em>Dull surfaces are the best emitters and absorbers of light but the worst reflectors of light waves.</em></u> White surfaces or polished surfaces are bad and worst emitters and absorbers of light waves respectively
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When an electron falls from a higher to a lower energy level in an atom, the photon released has a wavelength of 121.6 nm. What
yarga [219]

Answer:

\Delta E=1.64*10^{-18}J

Explanation:

The energy difference between the energy levels involved in the transition of the electron is directly proportional to the frequency of the emitted photon:

\Delta E=h\nu(1)

Where h is the Planck constant. The photon's frequency is inversely proportional to its wavelegth:

\nu=\frac{c}{\lambda}(2)

Here c is the speed of light. Replacing (2) in (1):

\Delta E=\frac{hc}{\lambda}\\\Delta E=\frac{(6.63*10^{-34}J\cdot s)(3*10^8\frac{m}{s})}{121.6*10^{-9}m}\\\Delta E=1.64*10^{-18}J

6 0
2 years ago
What is the momentum of a 200 kg truck travelling at 20 m/s?
geniusboy [140]

Answer:

p = 4000 kg-m/s

Explanation:

Given that,

The mass of a truck, m = 200 kg

Speed of the truck, v = 20 m/s

We need to find the momentum of the truck. The formula for momentum is given by :

p = mv

so,

p=200\times 20\\\\p=4000\ kg-m/s

So, the momentum of the truck is equal to 4000 kg-m/s.

8 0
3 years ago
True or False Criminals structure crime. For instance, crack cocaine street dealers prefer the middle of a long block as the bes
LenaWriter [7]
True. Though typically crack deals take place in a car, or in an alley. The middle of a long block is kind of exposed. It could happen anywhere in Chicago though.
But yeah, criminals structure crime.
8 0
3 years ago
If you traveled one mile at a speed of 100 miles per hour and another mile at a speed if 1 mile per hour, your average speed wou
Semenov [28]

Answer:

v = 1.98 mph

Explanation:

Given that,

Speed to travel one mile is 100 mph

Speed to travel another mile is 1 mph

The formula used to find your average speed is given by :

v=\dfrac{2v_1v_2}{v_1+v_2}

Putting the values, we get :

v=\dfrac{2\times 100\times 1}{100+1}

v = 1.98 mph

So, yours average speed is 1.98 mph.

7 0
3 years ago
Consider a balloon of mass 0.030kg being inflated with a gas of density 0.54kg/m. What will be the volume of the balloon when it
Nonamiya [84]

the weight of the balloon is .030 * 10 = 0.3 N

the weight of the gas of volume v is 0.54*10 N

The lifting force of a volume of v m³ of displaced air is 1.29v N

so, we need

1.29*10*v = 0.3 + 0.54*10*v

or

1.29v = 0.03+0.54v

7 0
1 year ago
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