What is the acceleration due to earth's gravity at a distance of one earth radius above earth's surface?
a. 10 m/s²
b. 5 m/s²
c. 20 m/s²
d. 2.5 m/s²
Answer: d. 2.5 m/s²
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A particle with an integral spin is a
a. boson. b. lepton. c. fermion. d. hadron. e. muon.
There are samples of two different isotopes, X and Y. Both contain the same number of radioactive atoms. Sample X has a half-life half that of Y. How do their decay rates compare?
a. The rates of X and Y are equal. b. X has a greater rate than Y. c. The rate depends on atomic number, not half-life. d. X has a smaller rate than Y.
A 0.75-kg sphere is released from rest and is moving 5.0 m/s after falling 2.0 m in a viscous medium. What is the change in mechanical energy caused by the force the viscous medium exerts on the sphere during this descent?
a. -6.1 J b. -4.6 J c. -5.3 J d. -6.8 J e. -2.7 J
A constant-volume gas thermometer is used to measure the temperature of an object. When the thermometer is in contact with water at its triple point (273.16 K) the pressure in the thermometer is 8.500 × 104 Pa. When it is in contact with the object the pressure is 9.650 × 104 Pa. The temperature of the object is:
A. 37.0 K B. 241 K C. 310 K D. 314 K E. 2020 K