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3 years ago

The percentage of incident light radiation reflected back to space is termed albedo. True or false?

Physics

1 answer:

liubo4ka [24]3 years ago

8 0

Answer:True

Explanation:

Albedo is a unit-less, non-dimensional quantity that shows how well a surface reflects solar energy. The value of albedo can vary from 0 to 1, 0 being the black and 1 refers to a white surface. Zero means Surface is a perfect absorber i.e. it absorbs all the incoming rays incidents on it. Albedo 1 means the surface is a perfect reflector.

Albedo usually applies for visible light, even though it may involve some of the infrared regions of the electromagnetic spectrum. The average albedo associated with earth surface is 30%

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Reposting the repost because it got deleted TvT

kakasveta [241]

Answer:

Because water mixes with the dirt when it rains to make that mud when the mud is left in the sun, the sun Evaporates that water, and eventualy it will turn into sand.

5 0

3 years ago

Which of the following best characterizes the free energy change ΔG for an endothermic reaction under physiological conditions?A

mote1985 [20]

Answer:

Explanation:

Whether endothermic or exothermic, for a reaction to be spontaneous, ∆G must be negative.

∆G=∆H-T∆S.

The values of temperature and entropy change can be determined when the values of enthalpy, entropy and temperature are known. When ∆G is zero, the reaction has attained equilibrium.

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4 years ago

It is the final seconds of an ice hockey game between the Flyers and the Bruins. The Bruins are down by 1 point. With 20 s left

liberstina [14]

Answer:

$P =0.1094 \ m$ past the goal post

Yes the Flyers won the match

Explanation:

Generally the distance covered by the pluck during the last 1.25 seconds is mathematically represented as

$D = ut + \frac{1}{2} * a * t^2$

=> $D =30 * 1.25 + \frac{1}{2} * (-0.5) * (1.25)^2$

=> $D =37.1094 \ m$

Generally the position of the puck when the game clock reaches zero is mathematically represented as

$P = 37.1094 -37$

$P =0.1094 \ m$ past the goal post

Given that the Bruins where one point down and Flyers scored another goal it means that the flyer are now two point up hence they won the match

6 0

3 years ago

Hail comes straight down at a mass rate of m/Δt = 0.050 kg/s and an initial velocity of v0 = -15 m/s and strikes the roof perpen

cupoosta [38]

Answer:

$F = 1.5 N$

Explanation:

Let the hails are coming down with speed "v" and then rebound with the same speed in opposite direction

So here the change in the momentum of the hails is given as

$\Delta P = mv - (-mv)$

$\Delta P = 2mv$

now we know by Newton's 2nd Law

$F = \frac{\Delta P}{\Delta t}$

here we have

$F = \frac{\Delta m}{\Delta t} (2v)$

now plug in all data

$F = 0.050(2\times 15)$

$F = 1.5 N$

6 0

3 years ago

What did isaac Newton believe light was made of

adelina 88 [10]

Sir Isaac Newton, held the theory that light was made up of tiny particles. In 1678, Dutch physicist, Christiaan Huygens, believed that light was made up of wavesvibrating up and down perpendicular to the direction of the light travels, and therefore formulated a way of visualising wave propagation.

8 0

3 years ago

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