?nd average force exerted on bullet while it is accelerated
A 13 g bullet is accelerated in a ri?e barrel 88 cm long to a speed of 453 m/s. Use the work-energy theorem to ?nd the average force exerted on the bullet while it is being accelerated.
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Compare and contrast Piaget's Cognitive-Development Theory and Vygotsky's Sociocultural Theory(major developmental theories).
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An elevator can lift a 184 N aircraft a distance of 39 meters in 14 s. What is the power output of the elevator?
A good baseball pitcher can throw a baseball toward home plate at 90 mi/h with a spin of 1510 rev/min. How many revolutions does the baseball make on its way to home plate? For simplicity, assume that the 60 ft path is a straight line.
A potter's wheel having a radius 0.54 m and a moment of inertia 11.7 kg·m2 is rotating freely at 48 rev/min. The potter can stop the wheel in 8.0 s by pressing a wet rag against the rim and exerting a radially inward force of 65 N. Find the
An airplane has a mass of 2.4e6 kg, and the air flows past the lower surface of the wings at 85 m/s. If the wings have a surface area of 1200 m2, how fast must the air flow over the upper surface of the wing if the plane is to stay in the air? Co
Why were the Olympics important to the ancient Greeks?
Consider a 4-drive, 200 GB-per-drive RAID array. What is the available data storage capacity for each of the RAID levels, 0,1,3,4,5 and 6?
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