Transla
Qualitative/Quantitative
(15 points)
You are assigned to do some calculations for a movie stunt that involves a car on a straight road. The road, pictured
above, has a hill that rises 8.0 m above the flat region. The top of the hill is a circular arc of radius 20 m. You need to
determine whether a car traveling under certain conditions will lose contact with the road at the top of the hill. There is
a stop sign 50 m from the beginning of the hill. You are to assume that a car of mass 1600 kg accelerates uniformly from
rest at the stop sign, has a speed of when it reaches the beginning of the hill, and then coasts with the engine off.
Assume energy losses due to friction and air resistance are negligible.
a) Calculate the magnitude of the acceleration of the car during the first 50 m.

Na food processing facility, a spherical container of inner radius r1 5 40 cm, outer radius r2 5 41 cm, and ther- mal conductivity k 5 1.5 w/m · k is used to store hot water and to keep it at 100°c at all times. to accomplish this, the outer surface of the container is wrapped with a 800-w electric strip heater and then insulated. the temperature of the inner surface of the container is observed to be nearly 120°c at all times. as- suming 10 percent of the heat generated in the heater is lost through the insulation, (a) express the differential equation and the boundary conditions for steady one-dimensional heat conduction through the container, (b) obtain a relation for the variation of temperature in the container material by solving the differential equation, and (c) evaluate the outer surface tempera- ture of the container. also determine how much water at 100°c this tank can supply steadily if the cold water enters at 20°c.

When an object is heated it contracts. a. true b. false

Difference between series and parallel circuits