Which of the following statements about Venus is correct?
A. Venus has a constant velocity.
B. There is no net force acting on Venus.
C. The Sun exerts a stronger force on Venus than Venus exerts on the Sun.
D. Venus is continually accelerating toward the Sun.
Answer: D. Venus is continually accelerating toward the Sun.
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A 4.7 cm radius spherical conducting shell has a uniform surface charge density. What is the density if the electric field 1.5 m from its center is 17 N/C outward?
a. 
b. 
c. 
d. 
e. 
A beam of plane polarized light is incident on 3 polarizers, the first with an axis at 30° to the original plane of polarization, the second at 60° to the original plane of polarization, and the third at 30° to the original plane of polarization. What angle does the plane of polarization of the transmitted light make with the original plane of polarization of the original beam?
a. 30° c. 90° b. 180° d. The answer is not given.
This diagram shows two energy levels in an atom. The lower level is "full" because it already has an electron with spin up and another with spin down. Therefore, a third electron must go into the higher energy level. What law or principle explains why?
A) the exclusion principle B) the uncertainty principle C) the law of conservation of angular momentum D) the law of conservation of energy
The equilibrium rule states that the vector sum of all forces acting on a
A) body at rest is zero. B) body in uniform motion is zero. C) non-accelerating body is zero. D) all of the above