An airplane overhead exceeds the sound barrier and produces a conical wave front. If the air through which the plane flew had been significantly warmer and the plane were traveling at the same speed, how would the angle of the conical wave front been different?
1.The angle would have been greater.
2.The angle would have been less.
3.The angle would have been the same.
4.The change in the angle cannot be determined from the information given.
1
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A) Venus B) Earth C) Mars D) Mercury
A speed of 65 miles per hour is the same as which of the following? (1.00 ft = 30.48 cm)
A) 24 m/s B) 29 m/s C) 32 m/s D) 37 m/s E) 42 m/s
A bucket in an old well is hoisted upward by a rope which winds up on a cylinder having a radius of 0.050 m. How many rev/s must the cylinder turn if the bucket is raised at a speed of 0.250 m/s?
a. 5.00 rev/s b. 7.85 rev/s c. 1.59 rev/s d. 0.80 rev/s e. 3.18 rev/s
According to Einstein, gravity is not the force exerted by one object on another, but rather the
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