Answer:
Time taken by the object is 0.012 s .
Explanation:
Given :
Frequency , f = 3.5 Hz .
Amplitude , A = 0.15 m .
At time t = 0 , x = 0 m.
Since , at time t = 0 , x = 0 m .
Therefore , equation of displacement is :
...equation 1.
Here , is angular frequency and is given by :
We need to find the time at which its displacement is ,
Putting all these value in equation 1 we get ,
Hence , this is the required solution.
If you burn it a really long, the. It gets smaller, which is a physical change. Hope this helps!
Alpha particles have both high mass and low velocity, but it would be the former that determines why they can't penetrate. An alpha particle is made of two protons and two neutrons, which is quite a large mass for a particle. This large mass keeps it from penetrating too deeply into anything, since it will essentially "get stuck" when it comes too near to another atom.
So the answer, I believe, is B. Alpha particles have high mass.
Their atomic numbers are all the same, because they all have the same number of protons. But their atomic weights are different, because they have different numbers of neutrons.