Answer is B.
In a lever, the effort arm is 2 times as a long as the load arm. The resultant force will be twice the applied force.
Hope it helped you.
-Charlie
Since the Units presented are not in the International System we will proceed to convert them. We know that,
So the speed in SI would be
The change in frequency when the wave is reflected is
Or we can rearrange the equation as
f' = Apparent frequency
f = Original Frequency
c = Speed of light
Replacing,
Since the waves are reflected, hence the change in frequency at the gun is equal to twice the change in frequency
Therefore the increase in frequency is 2979.63Hz
Answer:
d = 7200 m
Explanation:
Given that,
Average speed of a runner, v = 2 m/s
Time taken by the runner, t = 60 min = 3600 s
We need to find the distance covered by the runner.
Speed = distance divided by time taken.
v = d/t
Putting all the values,
So, the distance covered by the runner is 7200 m.
Answer:
b. aligned according to magnetic fields
Explanation:
just took a quiz and i got it right .
Answer:
3.528×10² V.
Explanation:
potential difference: This is the work done when one coulomb of charge moves from one point to another in an electric field. The S.I unit of potential difference is volt. The formula of potential difference is given as,
V = kq/r..................... Equation 1
And
E = kq/r² .................. Equation 2
Comparing equation 1 and equation 2,
V = E×r............................. Equation 3
Where V = potential difference, E = Electric field between the plate of the capacitor, r = distance between the plate.
Given: E = 6.3×10⁵ V/m, r = 0.56 mm = 0.00056 m.
Substitute into equation 3,
V = 6.3×10⁵×0.00056
V = 3.528×10² V.
Hence the potential difference of the plate = 3.528×10² V.