While in an airplane flying at 100 km/h you look down from the window and spot another airplane flying at the same speed in the opposite direction. Relative to you, the speed of the spotted plane is
A) zero.
B) 100 km/h.
C) 150 km/h.
D) 200 km/h.
Answer: D
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As you go from a point where a gravitational field is strong to a point where the gravitational field gets weaker, the gravitational field lines get farther apart
Indicate whether the statement is true or false
A hydrogen nucleus, which has a charge e, is situated to the left of a carbon nucleus, which has a charge 6e. Which statement is true?
A) The electrical force experienced by the hydrogen nucleus is to the left, and the magnitude is equal to the force exerted on the carbon nucleus. B) The electrical force experienced by the hydrogen nucleus is to the left, and the magnitude is greater than the force exerted on the carbon nucleus. C) The electrical force experienced by the hydrogen nucleus is to the left, and the magnitude is less than the force exerted on the carbon nucleus. D) The electrical force experienced by the hydrogen nucleus is to the right, and the magnitude is equal to the force exerted on the carbon nucleus.
Alh 84001
a. is a meteorite that shows evidence for life evolving on Mars. b. is the compound used by Miller to begin his experiment to produce amino acids. c. is the amino acid produced in the Miller experiment. d. is the molecule that controls the reproduction of DNA within a cell e. is the molecule that acts as DNAs messenger that assembles proteins from amino acids.
If scientists excavate two fossils at the Grand Canyon, one of which was found at a much deeper rock layer than the other, what can we assume about the fossils?
A) The fossil found in a deeper layer is older. B) The fossil found in a deeper layer is younger. C) The fossil found in a deeper layer is not as well-preserved. D) The fossil found in a deeper layer has a higher carbon-12 abundance.