Explanation:
If it doesn't specify vertical or horizontal, that means it wants you to find the total velocity. You can do that using Pythagorean theorem:
v² = vₓ² + vᵧ²
A I believe it would be true
Question four bulbs A,B,C and D are connected in a circuit shown in the figure below, the letters X, Y and Z represent three switches. Which switch is used to operate switch A separately?
Answer: x
Both are at the side of the spectrum that has the lower frequency