On what four assumptions is the principle of faunal succession based?
What will be an ideal response?
Answer: 1) The general sequence of fossils is similar worldwide. 2) Rock layers of different ages will contain different groups of fossils. 3) The principle of original horizontality is valid. 4) The principle of superposition is valid.
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Venus' lack of magnetic field means that:
A) there is no lightning on Venus. B) the surface of Venus has no protection from the Sun's radiation. C) it doesn't have a liquid metallic core. D) Venus' upper atmosphere is permanently ionized. E) there are constant aurorae everywhere on Venus.
An expandable container holds 2.30 mole of helium, He, gas with an initial pressure of 770 kPa and an initial volume of 2.10 L. The gas expands isothermally to a final pressure of 350 kPa
How much heat is gained by the gas during this process? (R = 8.31 J/mol ? K) A) 1280 J B) 792 J C) 685 J D) 1370 J E) 1700 J
The horizontal component of the buttressing force at the base of a pointed arch is
A) less than that of a rounded arch. B) equal to that of a rounded arch. C) greater than that of a rounded arch. D) zero in magnitude.
Charge of uniform density 12 nC/m is distributed along the x axis from x = 2.0 m to x = 5.0 m. What is the electric potential (relative to zero at infinity) at the origin (x = 0)?
a. 91 V b. 99 V c. 82 V d. 74 V e. 140 V