In America, we have frequent elections. One of the reasons…
In America, we have frequent elections. One of the reasons people think we have lower voter turnout is because we get tired of voting in so many different elections. What is it called when voters stop voting because they are apathetic about voting because they have to vote too frequently?
Read Details(Extra Credit: 5 points) A dolphin is swimming toward a wal…
(Extra Credit: 5 points) A dolphin is swimming toward a wall at the speed shown above. The dolphin emits a “chirp” at 50 kHz to echo-locate the wall. If this sound pulse is reflected back, what is the frequency of the echo received by the dolphin? Show and explain all work. (The bulk modulus of sea water is β = 2.31 x 109 N/m2 and the density of the seawater is ρ = 1.10 x 103 kg/m3.)
Read DetailsA police car travels down a two-lane road at a constant s…
A police car travels down a two-lane road at a constant speed of 100 mph, it siren emitting sound at a frequency of 600 Hz. Ahead of the police car, Danica is traveling in the same direction at a speed of 80 mph. What frequency does Danica hear? (Note: 1 mph = 0.447 m/s and vsound = 343 m/s)
Read Details