Given 4 tuning forks of frequency 446, 440, 443, and 449 Hz, how many different beat frequencies could be produced and what are they?
What will be an ideal response?
Question 2The mass of a mass-and-spring system is displaced 10 cm from its equilibrium position and released. A frequency of 4 Hz is observed. What frequency would be observed if the mass had been displaced only 5 cm and then released?
A) 8 Hz
B) 4 Hz
C) 6 Hz
D) 2 Hz
Question 3Consider point charges of +Q and +4Q, which are separated by 3 m. At what point, on a line between the two charges, would it be possible to place a charge of -Q such that the electrostatic force acting on it would be zero?
A) 3/5 m from the +Q charge
B) 1 m from the +Q charge
C) 1 m from the +4 charge
D) 3 m from the +4 charge
E) There is no such point possible.
Question 4A heavy bus bar is 20. cm long and of rectangular cross-section, 1.0 cm 2.0 cm. What is the voltage drop along its length when it carries 4000. A? (The resistivity of copper is 1.69 10-8 -m.)
What will be an ideal response?
Question 5The fact that Encephalization Quotients (EQs) of organisms have generally increased with time provides evidence for
A) cross-breeding between organisms
B) artificial selection
C) genetic mutations
D) convergent evolution toward intelligence
Question 6In which eon of Earth's history did life originate?
A) Proterozoic
B) Phanerozoic
C) Archean
D) Hadean