A lunar eclipse occurs when the
A) Sun passes into Earth's shadow.
B) Moon passes into Earth's shadow.
C) Earth passes into the Sun's shadow.
D) Earth passes into the Moon's shadow.
Answer: B
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Compound Microscope: The objective lens and the eyepiece of a microscope have focal lengths of 4.0 mm and 25 mm, respectively. The objective produces a real image 30 times the size of the object, with the final image viewed at infinity. The near point of the microscope user is at 25 cm. What is the distance between the object and the focal point of the objective lens?
A. 0.13 mm B. 0.18 mm C. 0.23 mm D. 0.28 mm E. 0.33 mm
All of the jovian planets rotate more rapidly than any of the terrestrial planets
Indicate whether the statement is true or false
For general projectile motion, which statement is true when the projectile is at the highest point of its trajectory?
A) Its acceleration is zero. B) Its velocity is perpendicular to the acceleration. C) Its velocity and acceleration are both zero. D) The horizontal component of its velocity is zero. E) The horizontal and vertical components of its velocity are zero.
In an inelastic collision between two objects with unequal masses:
a. the velocity of one will increase by the amount that the velocity of the other decreases. b. the momentum of one will increase by the amount that the momentum of the other decreases. c. the energy of one increases by the amount that the energy of the other decreases. d. the total momentum of the system will decrease.