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zhuklara [117]
3 years ago
9

What substance can be used to electrolyze water?

Physics
1 answer:
lubasha [3.4K]3 years ago
6 0
C/any electrolyte that is not easily reduced or oxidized
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Estimate the number of photons emitted per second from 1.0 cm2 of a person's skin if a typical emitted photon has a wavelength o
Diano4ka-milaya [45]

Answer:

2.63 x 10^18

Explanation:

A = 1 cm^2 = 1 x 10^-4 m^2

λ = 10,000 nm = 10,000 x 10^-9 m = 10^-5 m

T = 37 degree C = 37 + 273 = 310 k

Energy of each photon = h c / λ

where, h is the Plank's constant and c be the velocity of light

Energy of each photon = (6.63 x 10^-34 x 3 x 10^8) / 10^-5 = 1.989 x 10^-20 J

Energy radiated per unit time = σ A T^4

Where, σ is Stefan's constant

Energy radiated per unit time = 5.67 x 10^-8 x 10^-4 x 310^4 = 0.05236 J

Number of photons per second = Energy radiated per unit time / Energy of  

                                                                                               each photon

Number of photons per second = 0.05236 / (1.989 x 10^-20) = 2.63 x 10^18

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3 years ago
Agility refers to a person's level of flexibility.
tekilochka [14]
False, agility is more about how fast you are
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2. Find the velocity when the displacement is 40 m and the time is 5 s.
LenKa [72]

Answer:

V=?

S= 40m

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V=S/t

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V=8m/s

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3 years ago
Describe the differences between a plum pudding model and a nuclear model.
sleet_krkn [62]
The plum pudding model, which has been abandoned since the discovery of the nucleus, stated that electrons were embedded in a "mush" of positive material. The nuclear model says they are placed around a central nucleus.
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