Carbon-14 dating can reliably date ancient archeological samples up to approximately how many years?
A) 100 million
B) 50 thousand
C) 5 million
D) 10 billion
E) 5 thousand
B
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Doubling the magnetic field in a proton synchrotron changes the maximum kinetic energy of the protons by what amount?
A. It is quadrupled. B. It is doubled. C. It remains the same. D. it is halved E. It is quartered.
The foot pedal on hydraulic brake system exerts a force of 45 lbs on a piston with a diameter of 1.00 cm. The brake fluid in the brake system exerts the pressure from the foot pedal on a brake pad piston with a diameter of 2.50 cm. The force on the brake pad is
A. 133 lbs. B. 150 lbs. C. 281 lbs. D. 350 lbs. E. 402 lbs.
Gas in a constant-volume gas thermometer registers a pressure of 75.0 kPa at 0°C. Assuming ideal behavior, what is the pressure of this gas at 200°C?
A) 120 kPa B) 130 kPa C) 140 kPa D) 150 kPa E) 160 kPa
Event 2 occurs a time â^†t after event 1. If event 2 was caused by event 1, which of the following must be true?
A. The distance between event 1 and event 2 can be any amount. B. The distance between event 1 and event 2 is not more than c â^†t. C. There are frames of reference in which event 2 is before event 1. D. There are frames of reference in which event 1 is not related to event 2. E. All of these choices are false.