Answer:
Explanation:
The work increased the potential energy
W = PE = mgh = 40(9.8)(15) = 5880 J(oules)
There are two systems that contain only the fundamental frequency and they are the systems C and D.
<h3>What is fundamental frequency?</h3>
The term fundamental frequency refers to the lowest frequency of a vibrating body. It does not include the overtones or the harmonics.
From the image shown in the question, there are two systems that contain only the fundamental frequency and they are the systems C and D.
Learn more about fundamental frequency:brainly.com/question/9424813
#SPJ1
Answer:

Explanation:
q = Charge of proton = 
v = Velocity of proton = 
c = Speed of light = 
B = Magnetic field = 0.00687 T
= Angle = 
Magnetic force is given by

The magnetic force acting on the proton is 
The answer is 10 i think so