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1). A student drives the 100 mi trip back to campus after spring break and travels with an average speed of 61 mi/h for 1hour and 30 minutes.a). what distance was traveled during this time?b). Traffic get heavier, and the last part of the trip take sanother half-hour. What was the average speed during this leg of the trip?c). Find the average speed for total trip.
2). A student drops an object out the window of the top floorof a high-rise dormitory.a). Neglecting air resistance, how fast is the object traveling when its strikes the ground at the end of 3.9 s? First used standard British units and then expess the speed in mi/h for a familiar comparison.Can things dropped from high places be dangerous to people below?b). How far, in meters, does the object fall during the 3.9s? Comment on how many floors the dormitory probably has. (Assume that there are 32 floors/100m).
Two converging lenses (f1 = 8.50 cm and f2 = 5.90 cm) are separated by 17.4 cm. The lens on the left has the longer focal length. Locate the final image relative to the lens on the right
A 40kg child on a 2.30 m long swing is released from rest when the swing supports make an angle of 26 degrees with the vertical. The acceleration of gravity is 9.8 m/s2.
A block is in equilibrium on a frictionless incline plane due to a tension force from a string that is wrapped around a pulley, find the masses m1 and m2 of the blocks
Derive an equation for T as a function of k and m. If you plot a graph of T^2 versus m, what combination of variables represents the slope
what is the combined mass of the dog and basket.
A heat engine takes in 400J of energy from a hot reservoir and performs 35J of work in each cycle. obtain the energy expelled to the cold reservoir in each cycle
A downward force of 60 N is exerted on the top of the book by a hand pushing down on the book. What is the gravitational force acting on the book
An electric eel delivers a current of 0.85A to a small pencil-thin prey 15cm long. Estimate the energy delivered to the fish
A coil has 395 turns and self-inductance 3.25 mH. The current in the coil varies with time according to i = (680 mA) cos(?t/0.0250 s). What is the maximum emf induced in the coil
A 1.02mF capacitor is connected in series with an AC source with amplitude 50V and angular frequecy 40 rad/s. determine the amplitude of the current through this circuit
A large positively-charged object with charge q = 3.75 ?C is brought near a negatively-charged plastic ball suspended from a string of negligible mass. what is the angle the string makes with the vertical
For research purposes a sonic buoy is tethered to the ocean floor and emits an infrasonic pulse of sound. Determine the wavelength of the sound
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