I side more with B but a’s a good one
Answer: 11.1cm
Explanation:
Object distance (u) = 32cm
Image distance(v) = 17cm
Focal length(f) =?
Lens formular:
1/f = 1/u + 1/v
1/f = 1/32 + 1/17
Taking the L. C. M of 17 and 32
1/f = (17 + 32) / 544
1/f = 49/544
Taking the reciprocal
f = 544/49
f = 11.1 cm
Therefore, Focal length of the lens is 11.1cm
Answer:
Explanation:
Since we are given time, acceleration, and final velocity, we can use the following formula to find the initial velocity:
Our given values:
<em>Acceleration is negative because the car is slowing down.</em>
Add the values to the formula, and solve for :
We determine the electric potential energy of the proton by multiplying the net electric potential to the charge of the proton. The net electric potential is the difference of the final state to the that of the initial state. So, it would be 275 - 125 = 150 V.
electric potential energy = 150 (<span>1.602 × 10-19) = 2.4x10^-17 J</span>
D. Amplitude has no effect on velocity.
This question might have been to confuse you with the doppler effect which states that wavelengths become longer if the object causing the waves is moving away from the observer.