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A person travels by car from one city to another with different constant speeds between pairs of cities. She drives for 30.0 min at 85.0 km/h, 7.0 min at 70.0 km/h and 50.0 min at 60.0 km/h, and spends 40.0 min eating lunch and buying gas.
(a) Determine the average speed for the trip.(b) Determine the distance between the initial and final cities along this route.
A solid sphere with a radius of 75 mm rolls (without slipping#) down from rest along an inclined plane that is 5 m long. What angle does the plane make with the horizontal
A golf ball is hit horizontally from the edge of a ramp. It lands at an elevation 200 m below and its trajectory upon landing is 45° angle below the horizontal
Ultraviolet light is incident normally on the surface of a certain substance. The binding energy of the electrons in this substance is 3.44 eV. How many electrons are emitted from a square centimeter of the surface each second
Imagine two blocks before and after colision. Initially the left hand block of mass m1 = 2 kg is moving towards the right at v = 1 m/s. Determine whether the collision is elastic or inelastic
In a diesel engine, the piston compresses air at 302 K to a volume that is one-sixteenth of the original volume, What is the temperature of the air after the compression
A solid cylinder is mounted above the ground with its axis of rotation oriented horizontally. How much of the rope unwinds in this time interval
Two groups of canoeists meet in the middle of a lake. After a brief visit, a person in canoe 1 pushes on canoe 2 to separate the canoes. Suppose the speeds of the two canoes after they are pushed apart are 0.40 m/s for canoe 1 and 0.28 m/s for canoe ..
in her job as a dental hygienist kathryn uses a concave mirror to see the back of her patients teeth. when the mirror
the scientific method is used by scientists to understand the natural laws that the universe obeys. scientists are not
charge q1=1.4x10-8C is placed at the origin. Charges q2=-1.8x10-8C and q3=2.1x10-8C are placed at points (0.18m , 0m) and (0m , 0.24m)
an air-cored solenoid with length 30 cm area of cross-section 25 cm2 and number of turns 500 carries a current of 2.5
Consider a large number of simple pendulums each of length b and massm, which possess energies lying between E1 and E2. Show that the Hamiltonian for each pendulum is an ellipse.
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