  Math Central - mathcentral.uregina.ca  Quandaries & Queries    Q & Q    Topic: bubble gum   start over

One item is filed under this topic.    Page1/1            A spherical bubble gum bubble 2007-12-31 From Houston:Bazooka Joe is blowing a spherical bubble gum bubble. Let V be the volume in the bubble, R the inside of the bubble, and T the thickness of the bubble. V, T, and R are functions of time t. (a) Write a formula for V in terms of T and R. Hint: Draw a picture (b) Assume that the amount of bubble gum in the bubble is not changing. What is V'(t)? (c) After 5 minutes of blowing a bubble gum bubble, the bubble is 3ft in diameter and .01 feet thick. If the inside radius of the bubble is expanding at a rate of .5 feet per minute, how fast is the thickness changing? Hint: Remember that the volume of gum in the bubble does not change over time.Answered by Harley Weston.      Page1/1    Math Central is supported by the University of Regina and The Pacific Institute for the Mathematical Sciences.    about math central :: site map :: links :: notre site français