A beam of electrons has
A) wave properties.
B) particle properties.
C) both of these
D) neither of these
Answer: C
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Which of the following primarily determines the resolution of a telescope?
a. the diameter of the eyepiece c. the focal length of the objective b. the diameter of the objective d. the barrel length
Kinetic energy can be measured in
A. watts B. calories C. grams D. amperes
A projectile is launched with an initial velocity of 80 m/s at 30° above the horizontal. Neglecting air resistance, what is horizontal component of the projectile's acceleration?
A) 40 m/s2 B) 0 m/s2 C) 69 m/s2 D) 9.8 m/s2 E) 80 m/s2
You are given two converging lenses to build a compound microscope. Lens A has focal length 0.50 cm and lens B has focal length of 3.0 cm. Which of the two lenses would you use for the objective?
A) Lens A, because it has the shorter focal length. B) Lens B, because it has the longer focal length. C) It makes no difference which lens I use for the objective. D) None, because the objective should be a diverging lens.