1) find the volume of the rectangle ( lxwxh=v)
lengh= 8.1 cm
width=6.2 c
height= 3.3 cm
2) the original volume of the water is 70 ml. if you dropped a rock into the water and the volume becomes 72 ml. what is the volume of he rock?
3)why does the first method (lxwxh=v) for determining volume work only for a regularly shaped object?
4)will the water displacement method for determining volume work for any object or just an irregularly shaped one? why?
5) is one method of measurement more accurate than the other? why or why not?
6)would the water displacement method of measurement work for a cube of sugar? what about a cork? why or why not?
7)what did you find out from this investigation? be thoughtful in your answer.

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.

If a stone with an original velocity of 0 is falling from a ledgeand takes 8 seconds to hoybthe ground whays the final velocity of the stone

Which describes increasing the efficiency of energy resource