The amount of gravitational force that acts on a space vehicle that orbits Earth is
A) nearly zero.
B) nearly as much as the vehicle's weight on Earth's surface.
C) the same as the vehicle's weight on Earth's surface.
Answer: B
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Suppose you watch a leaf bobbing up and down as ripples pass it by in a pond. You notice that it does two full up and down bobs each second. Which statement is true of the ripples on the pond?
A) They have a frequency of 2 hertz. B) They have a frequency of 4 hertz. C) We can calculate the wavelength of the ripples from their frequency. D) They have a wavelength of two cycles per second.
The focal lengths of the objective and the eyepiece in a microscope are 0.29 cm and 2.50 cm, respectively. An object is placed at 0
30 cm from the objective lens and the image of this object is viewed with the eyepiece adjusted for minimum eyestrain (with the eye focused at the far point). The near point of the person using the microscope is 25 cm and the far point is at infinity. What is the final overall magnification of the microscope? A) -320 x B) -470 x C) -240 x D) -300 x E) -190 x
Which of these will always produce a magnetic field?
A. Another magnetic field B. A moving charge C. A negative charge at rest D. A positive charge at rest
Answer the following statement(s) true (T) or false (F)
Bell’s theorem shows that quantum theory contradicts any “hidden variable theory” that presumes that a quanton has objectively real properties