Problems involving a non-conservative force cannot be solved because there is no definable potential energy
Indicate whether the statement is true or false
FALSE
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_______________ variable stars are useful in measuring the distance to globular clusters
Fill in the blank(s) with correct word
An ion enters a mass spectrometer which has a 0.18 Tesla field perpendicular to an electric field of 1.6 kV/m and selects a velocity. The same magnetic field is then used to deflect the singly charged ion into a circular path of radius 12.5 cm
(a) What velocity was selected? (b) What was the ion mass?
A uniform film of oil (n = 1.31) is floating on water. When sunlight in air is incident normally on the film, an observer finds that the reflected light has a brightness maximum at ? = 450 nm and a brightness minimum at ? = 600 nm. What is the thickness of the oil film?
What energy must be added or given off in a reaction where a helium atom is separated into two hydrogen atoms and two neutrons? (Atomic masses for each: hydrogen, 1.007825 u; neutron, 1.008665 u; helium, 4.002602 u; also, 1 u = 931.5 MeV/c2.)
a. 28.3 MeV given off c. 20.7 MeV given off b. 20.7 MeV added d. 28.3 MeV added