You can spot the correct choice just by looking at their units.
Frequency has units of "per second".
a). and b). are distances, so that can't be it.
d). is time, so that can't be it.
c). is a number per second.
If there's a correct6 answer anywhere on this list,
then it has to be c).
Answer:
The optimum length of the antenna is 2.27 m
Explanation:
Given:
Broadcasting frequency Hz
From the formula of wavelength in terms of frequency,
Where speed of light
m
For finding the length of antenna,
m
Therefore, the optimum length of the antenna is 2.27 m
Answer:
Explanation:
20.1 + 2.00100 +48.28 + 0.015 = 70.396 ≈ 70.4
3 s.f. 6 s.f. 4 s.f. 3 s.f 3 s.f
Answer:
a = 603.59 m/s^2
Explanation:
from the data given . the rate of change in magnetic field is as follow
from the faraday's law of induction , the expression for the induced emf in region of radius r as follow
electric field at point P_1 as follow
from newton 2nd law of motion, the acceleration of proton is
F = ma
qE = ma
a = 603.59 m/s^2
Answer: 106. 25 m
Explanation:
In this situation the following equations will be useful:
(1)
(2)
Where:
is the object’s final velocity
is the object’s initial velocity
is the object's acceleration
is the time
is the distance traveled
Finding from (1):
(3)
(4)
Substituting (4) in (2):
(5)
Finding :