Cylinder-head bolts in an automobile engine
When cylinder-head bolts in an automobile engine are tightened, the critical quantity is the torque applied to the bolts. Why is the torque more important than the actual force applied to the wrench handle?
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Two circus clowns (each having a mass of 50kg) swing on two flying trapezes (negligable mass, length 25m) towards each other. At the peak of the swing, one grabs the other, and the two swing back to one platform. The time for the forward and retur
A Ferris wheel at a carnival has a radius of 38 feet. Suppose it turns at a rate of 100revolutions per hour. Find the angular speed of the wheel in radians per hour.
A student obtained the silica gel TLC plate shown by spotting samples of MidolTM, caffeine, and acetaminophen on the plate and eluting with petroleum etherchloroform (9:1 v/v).
An earthquake emits both S waves and P waves which travel at different speeds through the Earth. A P wave travel 9000 m/sec and an S wave travels at 5000 m/sec. If P waves are received at a seismic station 1 minute before an S wave arrives, how fa
The reaction between Mg (s) and HCl (aq) takes place inside a calorimeter. The thermometer registers an increase in temperature for the solution inside the calorimeter.
A gondola can carry 20 skiers, with a total mass of up to 1760kg . The gondola ascends at a constant speed from the base of a mountain, at 2450 m, to the summit at 3910 m. How much work does the motor do in moving a full gondola up the mountain?
Moreover, the correlation between male and female life expectancies was found to be 0.95. Use this information to estimate female life expectancy in a country where the male life expectancy is 62.8 years.
A steady wind of 25 knots over a very long fetch can create waves of 3-meter height, a period of approximately 10 seconds, and a speed of 16m/s. A steady wind of 40 knots can create waves of 6-meter height, a period of 15 s, and a speed of 24 m/s.
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