Elluviation and illuviation
What will be an ideal response?
Elluviation is the removal of inorganic and organic substances from a horizon by leaching occurs in the A horizon while illuviation is where downward moving, especially fine material, is accumulated
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Suppose that we suddenly discovered that all these years we'd been wrong about the distance from Earth to the Sun, and it is actually 10% greater than we'd thought. How would that affect our estimate of the distance to the Andromeda Galaxy?
A) It would not have any effect on our estimate of the distance to the Andromeda Galaxy. B) It would mean the distance to the Andromeda Galaxy is also 10% greater than we thought. C) It would mean the distance to the Andromeda Galaxy is 10% less than we thought. D) It would mean that all the objects we've assumed are standard candles really are not good standard candles, and therefore that we have no idea of the true distance to the Andromeda Galaxy.
The type of EM wave having the highest frequency is
a. ultraviolet b. infrared c. x rays d. microwave e. gamma rays
Thermal Expansion: By what length will a slab of concrete that is originally 18 m long contract when the temperature drops from 24°C to -16°C? The coefficient of linear thermal expansion for this concrete is 1.0 × 10-5 K-1.
A. 0.50 cm B. 0.72 cm C. 1.2 cm D. 1.5 cm
X-rays of wavelength 0.20 nm are scattered by a free electron
the change in the wavelength of the x-rays is observed to be 2.0 × 10-12 m at a certain scattering angle measured relative to the incoming x-ray direction. What is the scattering angle of the x-rays? (melectron = 9.11 × 10-31 kg, c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s) A) 60° B) 80° C) 20° D) 40°