A person is nearsighted with a far point of 75.0 cm
(a) What focal length contact lens is needed to give him normal vision?
(b) What is the power of the corrective lens?
What will be an ideal response?
(a) -75.0 cm (b) -1.33 diopters
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Nuclear Reactions: Determine the missing product X in the following nuclear reaction:
U + neutron ? 
Ba + X + 3 neutrons
Fill in the blank(s) with the appropriate word(s).
A car travels along the perimeter of a vertical circle (radius = 0.25 km) at a constant speed of 30 m/s. What is the magnitude of the resultant force on the 60-kg driver of the car at the lowest point on this circular path?
A. 0.37 kN B. 0.80 kN C. 0.22 kN D. 0.59 kN E. 0.45 kN
There are 640 acres in a square mile, and 5280 feet in 1.00 mile. What is the length in feet (to the nearest foot) of the side of a square having an area of 1.00 acre?
A) 660 feet B) 209 feet C) 165 feet D) 412 feet E) 435 feet
A figure skater rotating at 5.00 rad/s with arms extended has a moment of inertia of 2.25 kg?m2. If the arms are pulled in so the moment of inertia decreases to 1.80 kg?m2, what is the final angular speed?
A) 2.25 rad/s B) 4.60 rad/s C) 6.25 rad/s D) 1.76 rad/s E) 0.81 rad/s