the question about the DVD please (2.00 x 183.9)/[(6.02 × 1023) × (1.61 × 10-8)3

Question

the question about the DVD please

(2.00 x 183.9)/[(6.02 × 1023) × (1.61 × 10-8)3] = c. 0.8161/(2.205 × (2.5 ] = d. (9.00 × 60.0) + (50.0 × 60.0) + (3.00 × 101) = 51. Boston Marathon To qualify to run in the 2009 Boston Marathon, a distance of 26.2 miles, an 18-year-old woman had to have completed another marathon in 3 hours and 40 minutes or less. To qualify, what must a woman's average speed have been (a) in miles per hour and (b) in meters per second? DVDs If a DVD is 11.95 cm in diameter and spins at a rate of 10,000 revolutions per minute, how fast does it spin in miles per hour? n imperial gallon is 4.546 liters. How many U.S. gallor e in an imperial gallon? ympic Mile An Olympic "mile" is actually 1500 m. W

Explanation / Answer

One Revolution = pi * d distance

=> pi * 0.1195 m

=> 0.37523m

Distance covered in 10000 revolutions = 0.37523 * 10000 = 3752.3m in 1 minute

Distance covered in 1 hour = 3752.3m * 60 = 225138 m/hour

1 mile = 1609.34 m

Hence speed in miles/hour = 225138/1609.34 miles/hour

=> 139.894 miles/hour

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