1a. If you have set it to the frequency of middle C, 262 Hz, and spin the noisem

Question

1a. If you have set it to the frequency of middle C, 262 Hz, and spin the noisemaker with a period of 1 second on a string with length 2 m. What is the maximum frequency that the student hears?

b. The student is horrified at this noise and runs away at 9 m/s, what is the new maximum frequency the student hears?

2. A satellite orbiting Earth at an altitude of 450 km emits a radio signal that has a power level of 17 W when it reaches Earth. The signal is beamed in such a way that it covers an area of 7.0 m2 on Earth’s surface. What power is received by a ground-based antenna if the surface area of the antenna is 400 mm2?

Explanation / Answer

frequency =fo(vs-vobserver/vs-vsource)

frequncy =262(330/330-2) =263.6hz

b)

f=262(330-9/330-2)=256.4hz

Related Questions

Navigate

• Browse (All)
• Browse 1
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.