A large school district has 300 school buses. If each school bus is used 3.0 hours each day, the average speed of the school buses is 15 mi/h, and the fuel economy of the buses is 10 mi/gal
How much does it cost to run these buses for 22 school days if gasoline costs $4.10 a gallon? A) $60,000
B) $120,000
C) $180,000
D) $240,000
B
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The mean life (time constant) of rubidium-86 is 26.8 d. What is its half-life?
What will be an ideal response?
A 140. KeV photon strikes an electron and scatters through an angle of 120.°
(a) What is the wavelength of the photon before scattering? (b) What is the photon wavelength after scattering?
The force in member FE of the plane truss below is approximately:
(A) 21.5 kN
(B) 22.2 kN
(C) 3.9 kN
(D) 4.7 kN
A quantum particle
a. can be localized in space. b. can be represented by an infinitely long wave having a single frequency. c. can be represented by a wave packet. d. travels at the phase speed of the infinitely long wave having the highest frequency. e. has the highest probability of being present in those regions of space where its component waves interfere destructively.