Answer:
2.5 cm
Explanation:
Number of spins in 12 seconds = 18
Number of spins in 1 second = 18 / 12 = 1.5
Number of spins in one second is called frequency.
f = 1.5 rps
ac = 2.2 m/s^2
Let r be the radius of coin
Centripetal acceleration, ac = r x w^2
2.2 = r x ( 2 x 3.14 x 1.5) ^2
2.2 = r x 88.7364
r = 0.025 m = 2.5 cm
The half-life observed by an observer at rest is 1.25 s
Explanation:
In this problem, the particle is travelling at a significant fraction of the speed of light: therefore, we have to consider the phenomenon of the time dilation. The half-life of the particle as measured by an observer at rest is given by

where
is the proper half-life of the particle
v is the speed of the particle
c is the speed of light
For the particle in this problem,


Substituting into the equation, we find:

#LearnwithBrainly
Answer:
Sorry this isn’t going to be any help. You don’t have any statement that I’m able to see.
Explanation:
One problem with weight training as a way to improve overall health is that the results of a weight-training program are not measurable.
B.False
Answer:
It is constructed with a high mass and a high raidus.
Explanation:
The rotational inertia I for every object is calculated as:
cMR^2 = I
where c is a constant, M is the mass of the object and R the radius of the object.
So, for a flywheel, the rotational inertia is calculated as:
I = 
Then, for constructed a flywheel with the maximun rotational inertia we have to set the maximum mass and the maximun radius.