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A police car is moving towards you at a speed of 36.0 m/s. Its siren produces a frequency of 850 Hz. If the temperature at the time is 25 degrees celsius, what frequency do you hear as it approaches you? What frequency do you hear after it passes by you?
The archerfish successfully shoots down the resting insect by spitting water drops at the same angle 60^circ above the surface and with the same initial speed v as before. At what height h above the surface was the insect.
Consider a group of 20 molecules with the following speeds: three have speed 1 m/s, Determine the rms speed (in m/s) of the molecules in this group at this instant in time
Young's experiment is performed with light of wavelength 502nm from excited helium atoms. What is the separation of the two slits
Two automobiles, each of mass 1000 kg, are moving at the same speed, 21 m/s, when they have an inelastic collision. In what direction and at what speed does the wreckage move if one car was driving north and one east?
Explain by how much time elapses while the auto moves the 180 ft? If the acceleration is constant, how much time elapses while the auto moves the 180 ft.
The middle C string on a piano is under a tension of 977 N. The period and wavelength of a wave on this string are 3.82 ms, Find the linear density of the string
A farmer planted a field of Bt 123 corn and wants to estimate the yield in terms of bushels per acre. He counts 22 ears in 1/1000 of an acre. He determines that each ear has about 700 kernels on average. He also knows that the bushel contains abou..
A cart of mass 1.91kg traveling 1.29m/s inelastically strikes a stationary mass of 0.41kg. What is the total momentum of the system
A 0.900m -diameter vat of liquid is 2.60m deep. The pressure at the bottom of the vat is 1.40atm
A 60.0 g mass is attached to the bottom of a vertical spring and set vibrating. Find the frequency of oscillation
An excited H atom the e- is in 4d. The atom is in an external magnetic field. What are the smallest and largest possible angles
A curve with a 140 radius on a level road is banked at the correct angle for a speed of 20 . If an automobile rounds this curve at 30 , what is the minimum coefficient of static friction between tires and road needed to prevent skidding.
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