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Ronch [10]
3 years ago
11

What would make a train travel faster?

Physics
2 answers:
Sindrei [870]3 years ago
8 0

Answer:

Wd-40 would make anything go faster

aliya0001 [1]3 years ago
8 0

Answer:

less cars attached or coal

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Johns mass is 92.0kg on the earth, what is his mass on mars where g= 3.72m/s^2
BabaBlast [244]

The mass is a fundamental property of all matter.

Mass is not the same as weight, the weight depends on the gravity while the mass does not. Therefore the John's mass is the same in mars.

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12. Suppose a person is covered head to foot by wool clothing with average thickness of 2.00 cm and is transferring energy by co
Vikki [24]
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Your diagram is a muscle that helps you breathe. do you think this muscle is voluntary or involuntary? Explain.
PIT_PIT [208]
The diaphragm is primarily an involuntary muscle. Although voluntary means can be achieved, such as when you hold your breath while swimming, this is temporary as the diaphragm will eventually work on its own to supply your body with oxygen.
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3 years ago
The energy band gap of GaAs is 1.4 eV. Calculate the optimum wavelength of light for
notsponge [240]

Answer:

The optimum wavelength = (8.863 × 10⁻⁷) m = 886.3 nm

Explanation:

The light that will generate the photovoltaic energy of 1.4 eV will must have that amount of energy

Energy of light waves is given as

E = hf

h = Planck's constant = (6.626 × 10⁻³⁴) J.s

f = Frequency of the light

The frequency is then further given as

f = (c/λ)

c = speed of light = (3.0 × 10⁸) m/s

λ = wavelength of the light = ?

E = (hc/λ)

λ = (hc/E)

Energy = E = 1.4 eV = 1.4 × 1.602 × 10⁻¹⁹ = (2.2428 × 10⁻¹⁹) J

λ = (6.626 × 10⁻³⁴ × 3.0 × 10⁸)/(2.2428 × 10⁻¹⁹)

λ = (8.863 × 10⁻⁷) m = 886 nm

Hope this Helps!!!

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3 years ago
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