12. A projectile is launched from ground level with an initial velocity of 25 m/s at an angle of 27 degrees above the horizontal. (a) Draw a picture of the situation and label the known variables.

(b) What are the magnitudes of the y-component and x-component of the initial velocity? ( v0y and v0x )

(c) What is the maximum height that the projectile reaches?

(d) How much time does it take for the projectile to reach the maximum height?

(e) How far in the horizontal direction does the projectile hit the ground again?

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.

Why is metal often used for cooking pan?

Two technicians are discussing a resistance measurement between the can-h and can-l wires. technician a says this measurement should be done with the ignition switch in the "run" position. technician b states that a measurement of 0 ohms indicates an open in the network. which technician is correct?