Three-dimensional viewing was popular in the past with slide projectors. If the slides for left and right positions in the stereo projector are duplicates of each other
A) depth can be seen.
B) no depth can be seen.
C) only parallax can be seen.
Answer: B
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At Jupiter's very center is a core of
a. heavy elements (molten rock and iron). b. helium. c. hydrogen. d. heavy elements (molten rock and iron) and helium.
The magnetic field lines generated by a bar magnet
A) are external only. B) are both external and internal to the magnet. C) follow an inverse-square law. D) none of the above
An air-track cart is attached to a spring and completes one oscillation every 5.67 s in simple harmonic motion
At time t = 0.00 s the cart is released at the position x = +0.250 m. What is the position of the cart when t = 29.6 s? A) x = 0.0461 m B) x = 0.210 m C) x = 0.218 m D) x = 0.342 m E) x = -0.218 m
Assume the Heisenberg uncertainty principle can take the form DEDt ³ h/4B. How accurate can the position of an electron be made if its speed is 5 × 10^6 m/s and if the uncertainty in its energy is 10 eV?
a. 7.7 × 10^-18 m b. 1.3 × 10^-23 m c. 6.2 × 10^-15 m d. 1.6 × 10^-10 m e. 1.2 × 10^-9 m