Uncertainty Principle Using Momentum and Position: If the maximum possible accuracy in measuring the velocity of a particle increases, the maximum possible accuracy in measuring its position will
A. increase.
B. decrease.
C. not be affected.
Answer: B
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Ohm's Law: The figure shows electrons passing through a resistor. The arrow shows the direction in which the electrons are moving. Which of the following statements are correct? (There could be more than one correct choice.)
A. The electrons are moving slower at point b than at point a. B. The electric potential is higher at point b than at point a. C. The electric potential is lower at point b than at point a. D. The electrons are losing electric potential energy as they move through the resistor from a to b. E. The speed of the electrons at point b is the same as it is at point a.
A 120-kg refrigerator that is 2.0 m tall and 85 cm wide has its center of mass at its geometrical center. You are attempting to slide it along the floor by pushing horizontally on the side of the refrigerator
The coefficient of static friction between the floor and the refrigerator is 0.30. Depending on where you push, the refrigerator may start to tip over before it starts to slide along the floor. What is the highest distance above the floor that you can push the refrigerator so that it will not tip before it begins to slide? A) 0.71 m B) 1.0 m C) 1.2 m D) 1.4 m E) 1.6 m
What aspect of the Sun's behavior wraps and distorts the solar magnetic field?
A) the differential spin between the equatorial and polar regions B) sunspot activity due to differential heat dispersion C) plasma fluxes within the core D) the cycle of the reversal of the magnetic poles
Human reaction time is usually greater than 0.10 s. If your friend holds a ruler between your fingers and releases it without warning, how far can you expect the ruler to fall before you catch it, assuming that air has no effect on the ruler?
A) At least 3.0 cm B) At least 4.9 cm C) At least 6.8 cm D) At least 9.8 cm