30 an object starts from rest and slides with
negligible friction down an air track tipped at an
angle from the horizontal. a student records
values of the object's position along the track at
various times. the value of @ can best be
determined from which of the following?
(a) the intercept of a graph of position as
a function of time
(b) the intercept of a graph of position as
a function of the square of time
(c) the slope of a graph of position as a function
of time
(d) the slope of a graph of position as a function
of the square of time

If you have a bowl with six apples and you take away four, how many do you have? anyone take a guess and post it. lol getting rid of my account might as well do it with some fun

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.

What causes the formation of ocean currents?