Answer:
Explanation:
Radioactive decay behaves according to the law of exponential decay:
Where:
So we need to find the decay rate r. Let's find it using the equation and the data provide, but first, we need to convert the hours in days:
Now for 
then:
Divide both sides by 100:
Take the natural logarithm of both sides:
Multiply both sides by -8/11:
Now we have found the rate decay r, let's find how many milligrams will remain after 59 hours (25/12 day):
A box residing on an inclined plane has following forces:
In the X- direction
Mg sin (theta) = horizontal component of weight of the box
f = Frictional force = uN , u = frictional factor, N= mg
In the Y- direction
upward force = Normal reaction of the box = mg
downward force = mg cos(theta) = vertical component of weight of the box
Answer:
The Light was reflected, b.
Explanation:
If the flashlight was pointed at the mirror, it was reflected because it did not stop on the mirror or go through the mirror or reflect in different ways.
