A charge will not experience a force in a magnetic field if it is not moving or if it is moving parallel to the magnetic field. <span>Why </span>aren't all materials magnetic<span>? Most </span>atoms have<span> electrons placed symmetrically so their </span>magnetic<span> fields cancel out.</span>
Answer:
P = F/A = 600.0 / (2.0(0.40)) = 750 N/m² = 750 Pa
Explanation:
Answer:
Option A is correct - While a guitar string is vibrating, you gently touch the midpoint of the string to ensure that the string does not vibrate at that point. The lowest-frequency standing wave that could be present on the string vibrates at twice the fundamental frequency.
Explanation:
Before touching the midpoint of the string, the string vibrates with one loop.
Fundamental frequency, f1 = v/(2*L)
Now, when the midpoint of the guitar string was touched, the string vibrates with two loops.
Hence, f2 = 2*v/(2*L)
f2 = 2*f1
Therefore, compared to the fundamental frequency the frequency would be double.
Option A is correct - While a guitar string is vibrating, you gently touch the midpoint of the string to ensure that the string does not vibrate at that point. The lowest-frequency standing wave that could be present on the string vibrates at twice the fundamental frequency.
B) Hope it helps ,Have a nice day :)
