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Calculate the root mean square speed of argon molecules in meter per second and kilometers per hour (hint 78.8 gram per mile) at 30C
78.8×303= 23876.4
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You just competed in a track meet and you ran the 1500 m race in 459 s. What was your average speed in miles per hour?
The average speed in meters per second:1500 m / 459 s = 3.268 m/s.1 m/s equals 2.2369 miles per hour.3.268 x 2.2369 = 7.31 mphAnswer: 7.31 miles per hour
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If the fuel efficiency of a car is 13.0 km/L , what is its fuel efficiency in miles per gallon? [1 mile = 1.61 km, 1 gallon = 3.79 L]
Solution: The fuel efficiency of a car in miles per liter: 13/1.61=8.07 mile/L The fuel efficiency in miles per gallon: 8.07x3.79=30.6 mile/gallon
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A person walks a mile in 29 minutes. Calculate the speed in KM/hour.
(1 Mike =1609 meters)
3.328 km /hour
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Helium is a valuable gas used in industry.How many miles of helium atoms are in 6.46 g of helium
(6.46 / 4) x 6.02 x 10^23 = 9.72 x 10^23
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an 79.0 kg athlete running a "4-minute mile" (i.e. 4.00 min/mile) . Answer in nm.
λ = h / p = h / m x v=6.62 x 10 -34 /79000 x 107.2896=7.81039992e-41 m.7.81039992e-32 nm
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an 80.0 kg athlete running a "4-minute mile" (i.e. 4.00 min/mile)
nm =?
1 mile / 4 min x (1 min / 60 s) x (1609 m / 1 mile) = 6.70 m/swavelength = 6.626x10-34J*s/(80kg*6.7m/s) = 3.55*10-31m = 3.55*10-22 nm
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The men's world record for swimming 1500.0 m in a long course pool (as of 2007) is 14 min 34.56 s. At this rate, how many seconds would it take to swim 0.600 miles (1 mi = 1609 m)?
14 min 34.56s = 874.56 s0.600 miles = 0.600*1609 = 965.4 m1500.0 m ---------- 874.56 s965.4 m ------------- tt = 965.4*874.56/1500.0 = 562.87 s or 9 min 22.87sanswer: 9 min...
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Let a doctor earns $20 per hour, a plumber $ 5 per hour, and a professor $ 10 per hour. Everything else the same, which one will devote more hours to negotiating the price of a new car? Explain
A doctor earns $20 an hour,assuming all of them work 8 hours a day,in a day the doctor earns $160,assuming, assuming he works 5 days a week,he earns$ 800,in...
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a) Let a doctor earns $20 per hour, a plumber $ 5 per hour, and a professor $ 10 per hour.
Everything else the same, which one will devote more hours to negotiating the price of a
new car? Explain
The time value is different for the three individuals. The doctor values their time at 20$ per hour, the plumber at 5$ per hour, and the professor at 10$ per...
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