Question

plz fast no scam or i will report both question​

Answer 1

Step-by-step explanation:

$25) \: \: \: \: \: \: frequency = \frac{50}{4} = \frac{25}{2} = 12.5 \: \: {s}^{ - 1} \\ \\ time \: period = \frac{1}{f} = \frac{1}{12.5} = \frac{10}{125} = \frac{2}{25} = 0.08 \: seconds \\ \\ 26) \: \: \: \alpha = required \: angle = 30 \: degree. \\ (from \: the \: diagram).$