A harvest mouse can detect sounds below the threshold of human hearing, as quiet as -10 dB. Suppose you are sitting in a field on a very quiet day while a harvest mouse sits nearby. A very gentle breeze causes a leaf 1.5 m from your head to rustle, generating a faint sound right at the limit of […]
A dark blue cylindrical bottle is 22 cm high and has a diameter of 7.0 cm. It is filled with water. The bottle absorbs 60% of the light that shines on it as it lies on its side in the noonday sun, with intensity 1000 W/m^2. By how much will the temperature of the water increase in 5.0 […]
A wave on a string is described by y(x, t) = (3.0 cm) x cos[2π(x/(2.4 m) + t/(0.20 s))], where x is in m and r in s. a. In what direction is this wave traveling? b. What are the wave speed, frequency, and wavelength? c. At t = 0.50 s, what is the displacement of […]
A female orb spider has a mass of 0.50 g. She is suspended from a tree branch by a 1.1 m length of 0.0020-mm-diameter silk. Spider silk has a density of 1300 kg/m^3. If you tap the branch and send a vibration down the thread, how long does it take to reach the spider?