Answer:
r = 1.16 m
Explanation:
It is given that,
Magnetic field, 
Velocity of proton, 
We need to find the radius (in m) of the circular path the particle will follow when it is travelling within the magnetic field. The radius followed by the proton is given by :

m is mass of proton, 
So,

So, the radius of circular path is 1.16 m.
Work = force × distance
= 35 N × 200 m
= 7000 J
The correct answer is:
false
The explanation:
It is not called a control group as the control group is a group of subjects closely resembling the treatment group in many demographic variables but not receiving the active medication or factor under study and thereby serving as a comparison group when treatment results are evaluated.
The woman on the platform is correct because it is the pace of the man moving on the train not walking.
Answer:
f = -60 cm, this means tha the focal point is on the same side as the side where the object is located.
Explanation:
let u be the distance from the lens to the object and u = -35 cm, v be the distance from the lens to the image and m is the magnification and m = -v/u and f is the focal point.