Answer:
Once you've had chickenpox you can't again.
Explanation: the virus remains inactive in your nerve tissue. Although it's unlikely you will get chickenpox again, the virus may reactivate later in life and cause a related condition called shingles.
<h2>The velocity of car was m m/s </h2>
Explanation:
When the car skids , its centripetal force is provided by frictional force .
Here centripetal force F = 
here v is the velocity of car and r is the radius of the curve .
The frictional force f = μ R
here μ is the coefficient of kinetic friction and R is normal reaction
Thus f = m g
On horizontal road R = mg
Thus F = f at the time of skid .
Thus v = 
=
= 9 m/s
volume of milk is given as

we will convert it into mL unit

mass of the milk m = 2kg
m = 2000 g
now for the density we can use



<em>so the density is 0.264 g/mL for above sample</em>
Answer:
Negative, because the speed is decreasing.