A puck with a mass m1 = 50 g moving at 1.0 m/s approaches a stationary puck with a mass m2 = 100 g on a frictionless air table, and they undergo a sudden two-dimensional elastic collision
After the collision, both pucks have identical speeds, but travel in different directions. What is the angle between the original and final paths of puck with mass m1? A) 30°
B) 60°
C) 90°
D) 120°
E) 150°
C
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Household circuits are wired in parallel. Adding more appliances to a parallel circuit
A. increases the voltage sent to each appliance. B. decreases the current sent to each appliance C. increases the current drawn from the circuit but does not change the current to each appliance.
Christie bought a 9 x 50 pair of binoculars for stellar observing. The 9 is the
A) f/number. B) aperture in cm. C) angular magnification. D) aperture in mm. E) f/number-1
A motor with a coil resistance of 12.4 ? is attached to a voltage supply of 66.4 V. What is the current in the motor when it is running at its maximum speed with a back emf of 22.6 V?
a. zero b. 3.53 A c. 7.18 A d. 5.35 A e. 543 A
An object whose center of gravity is below its point of support, will be in neutral equilibrium
Indicate whether the statement is true or false