11. A bicycle wheel turns 15 times in covering a distance of 66 m. Find the radius of the wheel​

r = 10.5 m

Step-by-step explanation:

Given that,

A bicycle wheel turns 15 times in covering a distance of 66 m.

We need to find the radius of the wheel.

The distance that a wheel travels in one rotation is simply the circumference of the circle.

Where

r is the radius of the wheel

Put all the values,

So, the radius of the wheel is equal to 10.5 m.  

step-by-step explanation: a reaction is first order. if the initial reactant concentration is 0.0200 m, and 25.0 days later the concentration is 6.25 x 10-4 m, then its half-life is:

x=half

step-by-step explanation: