Thermal Expansion: The coefficient of volume expansion of a certain olive oil is 0.68 × 10-3 K-1. A 1.0-L glass beaker is filled to the brim with olive oil at room temperature. The beaker is placed on a range and the temperature of the oil and beaker increases by 25 C°. As a result, 0.0167 L of olive oil spills over the top of the beaker. Which of the following values is closest to the coefficient of linear expansion of the glass from which the beaker is made?
A. 1 × 10-6 K-1
B. 4 × 10-6 K-1
C. 1 × 10-5 K-1
D. 2 × 10-5 K-1
E. 3 × 10-5 K-1
Answer: B
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The surface water temperature on a large, deep lake is 3°C. A sensitive temperature probe is lowered several m into the lake. What temperature will the probe record?
A) a temperature warmer than 3°C B) a temperature less than 3°C C) a temperature equal to 3°C
A proton moves around a circular path (radius = 2.0 mm) in a uniform 0.25-T magnetic field. What total distance does this proton travel during a 1.0-s time interval? (m = 1.67 × 10?27 kg, q = 1.6 × 10?19 C)
A. 82 km B. 59 km C. 71 km D. 48 km E. 7.5 km
Einstein's special relativity is based upon two postulates. The most radical of the two postulates states that
A. the classical velocity addition formula still holds at relativistic speeds. B. there is no ether surrounding the Earth. C. the speed of light is finite. D. the speed of light is the same for all observers in all inertial reference frames.
Which statement below regarding the First Law of Thermodynamics is most correct?
a. A system can do work externally only if its internal energy decreases. b. The internal energy of a system that interacts with its environment must change. c. No matter what other interactions take place, the internal energy must change if a system undergoes a heat transfer. d. The only changes that can occur in the internal energy of a system are those produced by non-mechanical forces. e. The internal energy of a system cannot change if the heat transferred to the system is equal to the work done by the system.