A cup of coffee with temperature 155degreesF is placed in a freezer with temperature 0degreesF. After 15 minutes, the temperature of the coffee is 46degreesF. Use Newton's Law of Cooling to find the coffee's temperature after 20 minutes.

= 30.67°F

 ≅ 30.70°F

Explanation:

Newton's law,

When T(t) is the final temperature

= Temperature of surrounding

= Initial temperature

=duration of cooling

k = constant

Now take natural log on both the sides

k = 0.081

  = 155 (0.1979)

 = 30.67°F

 ≅ 30.70°F

explanation:

the masses of the objects and the distance between them

the simple machine has three main features. they are:

fulcrum is the center point or pivot point of the machine. effort is input force/ applied force. load is external force/ output.

the keisha 's machine labels are

x : load

y: fulcrum

z: lever