Considering only the horizontal portion of the seats, what is the average surface area of all the seats in a football stadium that seats 100,000 spectators?
a. 
b. 
c. 
d. 
e. 
e.
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A 975-kg sports car (including driver) crosses the rounded top of a hill (raduis=88.0m) at 12.0 m s. Determine
(a) the normal force exerted by the road on the car, (b) the normal force exerted by the car on the 72.0-kg driver, and (c) the car speed at which the normal force on the driver equals zero.
Two taut strings of identical mass per unit length are stretched with the same tension with their ends fixed, but one string is 0.330 cm longer than the other. Waves on these strings propagate at 34.0 m/s
The fundamental frequency of the shorter string is 258 Hz. What is the beat frequency when each string is vibrating at its fundamental frequency? A) 12.3 Hz B) 9.00 Hz C) 12.0 Hz D) 12.7 Hz E) 11.3 Hz
Solenoid: In order to trap the starship Enterprise, the diabolical Klingons build a huge ideal solenoid 10 light-years long with a diameter of 2.0 million kilometers. Every kilometer of length of the solenoid contains 100 turns of wire. What magnetic field strength is produced near the center of the solenoid using a current of 2.00 kA? (?0 = 4? × 10-7 T ? m/A)
Fill in the blank(s) with the appropriate word(s).
Comet nuclei can be darker than charcoal
Indicate whether the statement is true or false