Two long parallel wires carry unequal currents in the same direction. The ratio of the currents is 3 to 1 . The magnitude of the magnetic field at a point in the plane of the wires and 10 cm from each wire is 4.0 ?T. What is the larger of the two currents?
a. 5.3 A
b. 3.8 A
c. 4.5 A
d. 3.0 A
e. 0.5 A
d
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An air mass forming over the Gulf of Mexico would be classified as
a. mE. b. mT. c. aP. d. cE.
The public debate about Martian canals was not resolved until
A) many scientists were unable to reproduce Percival Lowell's sketches of Martian canals B) the governing body of astronomy, the International Astronomical Union made an official statement on the matter C) the first spacecraft flew past Mars in 1965 D) the first spacecraft landed on Mars in 1976
Answer the following statement(s) true (T) or false (F)
1. 
U (uranium) can decay to 
Pb (lead) through an appropriate sequence of alpha and beta decay processes.
Two bodies of equal mass m collide and stick together. The quantities that always have equal magnitude for both masses during the collision are
a. their changes in momentum. b. the force each exerts on the other. c. their changes in kinetic energy. d. all of the above. e. only (a) and (b) above.