Which subatomic particles are arranged in various energy levels or orbitals?
a. electrons only
b. protons only
c. neutrons only
d. electrons and protons
e. protons and neutrons
a
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Sustainable development can only be pursued if
a. there is no "birth dearth," or declining population b. extreme rates of population growth are limited. c. the utilization rate is the same as the production rate. d. we "grow" our way out of problems. e. population size and growth are in harmony with the changing productivepotential of the ecosystem.
Pressure: A brick weighs 50.0 N, and measures 30.0 cm × 10.0 cm × 4.00 cm. What is the maximum pressure it can exert on a horizontal surface due to its weight?
A. 1.25 Pa B. 12.5 Pa C. 1.25 kPa D. 12.5 kPa
The kinetic theory of gases suggests the average kinetic energy per molecule is (for a monatomic gas)
A) 1/2 kT. B) 5/2 kT. C) 3/2 kT. D) 2 kT. E) kT.
It is often possible to use the atomic masses when calculating the binding energy of a nucleus. The reason for this is
a. the electron masses do not cancel. b. the electron masses cancel. c. tables of nuclear masses are usually not available. d. the mass of the electron can usually be neglected when compared to the mass of the neutron. e. the atomic masses are the same as the nuclear masses.