A heavy truck and a small truck roll down a hill. Neglecting friction, at the bottom of the hill the heavy truck has greater

A) speed.
B) acceleration.
C) momentum.
D) all of the above
E) none of the above

Answer: C

Physics & Space Science

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According to the atomic materialist philosophy, certain things are regarded as "real" and other things as merely "imaginary." Which of the following is [or are] regarded by this philosophy as real?

A) human emotions B) directly observable phenomena such as color and warmth C) atoms D) Both answers A and B are correct. E) None of the above are regarded as real by the atomic materialist philosophy.

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Physics & Space Science

Find the sum of the following two vectors: (i) 50 units due east and (ii) 100 units 30° south of west

a. 100 units 30° south of west b. 62 units 54° south of west c. 87 units 60° south of west d. 62 units 15° south of west

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Physics & Space Science

The anomalous Zeeman effect is different from the normal Zeeman effect because

a.to observe the normal Zeeman effect, the atom must be in a magnetic field, while the anomalous Zeeman effect depends on the external electric field. b.the split of energy levels from the anomalous Zeeman effect depends on the Lande g factor and the split from the normal Zeeman effect depends on the gyromagnetic ratio. c.the split of energy levels from the anomalous Zeeman effect depends on the intrinsic spin quantum number and the split from the normal Zeeman effect depends on the magnetic quantum number. d.the total angular momentum vector only precesses in the anomalous Zeeman effect.

e. only the normal Zeeman effect depends on the angular momentum L.

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Physics & Space Science

Astronomers estimate that new stars form in our galaxy at the rate of about

A) one per year. B) a few (2-3 ) per year. C) ten per year. D) 20-30 per year. E) 100 per year.

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Physics & Space Science