Fragments that do not completely burn in the atmosphere and eventually fall on Earth are called
A. asteroids.
B. meteoroids.
C. meteorites.
D. meteors.
Answer: C
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Conduction: Two metal rods are to be used to conduct heat from a region at 100°C to a region at 0°C as shown in the figure. The rods can be placed in parallel, as shown on the left, or in series, as on the right. When steady state flow is established, the heat conducted in the series arrangement is
A. greater than the heat conducted with the rods in parallel. B. the same as the heat conducted with the rods in parallel. C. less than the heat conducted with the rods in parallel.
Suppose an average molecule's displacement is 1.2 m in one hour. What is the diffusion constant in SI units (m, kg, s)
a. 4.0 × 10^-4 SI units c. 2.8 × 10^-5 SI units b. 1.0 × 10^-4 SI units d. 4.6 × 10^-8 SI units
An 8000 kg satellite is launched from the surface of the earth, and injected into a circular orbit at an altitude of 100 km above the surface of the earth. The kinetic energy of the satellite in the circular orbit is 
A. 
B. 
C. 
D. 
E. 
The particle which adds mass but no charge to the atomic nucleus is the:
A) positron. B) proton. C) neutron. D) neutrino. E) alpha particle.