Mass on a Spring: A 0.150-kg air track cart is attached to an ideal spring with a force constant (spring constant) of 3.58 N/m and undergoes simple harmonic oscillations. What is the period of the oscillations?
A. 2.57 s
B. 0.527 s
C. 0.263 s
D. 1.14 s
E. 1.29 s
Answer: E
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Resistors in Combination: A combination of a 2.0-? resistor in series with 4.0-? resistor is connected in parallel with a 3.0-? resistor. What is the equivalent resistance of this system?
A. 2.0 ? B. 3.0 ? C. 4.0 ? D. 9.0 ?
At decoupling, the electrons and protons were made from neutron decay
Indicate whether the statement is true or false
A series of possible particle processes are listed below. Which (if any) are probably not processes mediated by the weak interaction? (Note: ? = a photon, ? = a muon, which is a lepton like the electron but heavier. Don’t worry about conservation of energy.)
A. 
B. 
C. 
D. 
E. All might be weak processes.
How many arcminutes are in 1°?
A) 60 B) 360 C) 3600 D) 100 E) 10,000