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An ambulance with a siren emitting a whine at 1530 Hz overtakes and passes a cyclist pedaling a bike at 2.55 m/s. After being passed, the cyclist hears a frequency of 1522 Hz. How fast is the ambulance moving? (Take the speed of sound in air to be 343 m/s.)
Three concentric, thin, long conducting cylindrical shells have radii of 3.00 mm, 5.00 mm, and 6.00 mm, Find the capacitance per unit length of this configuration
The planet Uranus has a radius of 25560km and a surface acceleration due to gravity of 11.1m/s^2 at its poles. Calculate the mass of Uranus from the above data
On an old-fashioned rotating piano stool, a woman sits holding a pair of dumbbells at a distance of 0.650m from the axis of rotation of the stool. Compute the kinetic energy of the system after the dumbbells are pulled in
A jet flying faster than the speed of sound creates a shock cone of high pressure air. What will be the angle of the shock cone
Light of a wavelength 450 nm is incident on a sodium emitter in a photoelectric effect apparatus. Sodium is 2.3 eV, What is the stopping potential for the emitted electrons
A fully charged 7.8 uF capacitor is connected in series with a 1.8×105 ohm resistor. What percentage of the original charge is left on the capacitor
An advertisement claims that a centrifuge takes up only 0.127m of bench space but can produce a radial acceleration of 3000g at 5000 rev/min. Calculate the required radius of the centrifuge
If an inductor carrying a 1.40 A current stores an energy of 0.250 mJ, How much energy does the same inductor store if it carries a 2.9 A current
A 45dB sound wave strikes an eardrum whose area is4.2multiplied by10-5m2. How much energy is absorbed by the eardrum per second
The same activity is measured for two different isotope samples. One sample contains 0.0450 kg of (atomic mass = 230.033 937 u, t1/2 = 20.8 days). What is the mass of the second sample
q1. a 3.20 box that is several hundred meters above the surface of the earth is suspended from the end of a short
Design a circuit that will store data from four binary sensors (presenting either a high or low value) when an enable pulse from a digital source first goes high. Assume that the enable input is normally low and the pulse is high for 1 sec.
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