A particle is in the ground state of a one-dimensional box of length 1.0 m. What is the minimum value of its momentum (in kg × m/s)?
a. 9.9 × 10^-34
b. 6.6 × 10^-34
c. 3.3 × 10^-34
d. 13 × 10^-34
e. cannot be solved unless mass of particle is known.
C
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Two different samples have the same mass and temperature. Equal quantities of energy are absorbed as heat by each. Their final temperatures may be different because the samples have different:
A. thermal conductivities B. coefficients of expansion C. densities D. volumes E. heat capacities
When temperature is plotted against entropy, the area under the process path is equal to
A) the work done. B) the heat transferred. C) the change in internal energy. D) the heat added less the work done.
Assume a gram of a substance marketed as "Pure Energy" is annihilated by a gram of a second substance "Anti-Pure Energy." How long would the energy released power a city which uses 109 watts of power?
a. 40 hrs b. 25 hrs c. 50 hrs d. 65 hrs e. 50000 hrs
Three strings on a guitar are first stretched to the same tension. The first of the strings is heavy (thick), the third is light (thin), and the second is in between. Rank them according to the speed at which waves would propagate along them if they were plucked, with the fastest last
1.(3) (2) (1) 2.(3) (1) (2) 3.(1) (2) (3) 4.The waves would propagate at the same speed through each.