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1. A water wave has a frequency of 6 Hz and a wavelength of 3 m. (a) What is the period of these waves? (b) What is the wave velocity?
2. A submarine sends a sonar signal, which returns from another ship 2.250 s later. How far away is the other ship if the speed of sound in seawater is 1,530.0 m/s?
3. You see condensed steam expelled from a ship's whistle 2.50 s before you hear the sound. If the air temperature is 20.0 °C, how many meters are you from the ship?
4. Sound from the siren of an emergency vehicle has a frequency of 750.0 Hz and moves with a velocity of 343.0 m/s. What is the distance from one condensation to the next?
Transform these lengths to the observers' frame of reference. Calculate the frequency of the light in the star's frame of reference.
A cable passes over a pulley. The cable does not slip on the pulley, and the tension in the cable is not the same on opposite sides of the pulley. determine its angular acceleration
what is the concentration of h ions in a solution of hydrocholoric acis that was prepared by diluting 15.0 ml of
In seawater, a life preserver with a volume of 4.00×10?2 m^3 will support a 70.0 kg person, find the density of the material composing the life preserver
A horse drags a 100 kg sled a distance of 4 km in 20 minutes. What is the coefficient of sliding friction between the sled and the ground
The Sun emits energy at the rate of about 3.9 x 1026 W, estimate the fraction of this energy that falls on Earth
This question has to do with the oil drop experiment and how much voltage must be applied to keep a drop suspended in air. how much voltage must be used to keep the oil drop suspended
a spring without mass has natural length lo. one end is stuck to a fixed point and the other attached to a mass m. the
Write a formula for this relationship, label each variable and indicate the units used to measure each. Would resistivity be constant for a specific resistor?
At highway speeds, a particular automobile is capable of an acceleration of about 1.8 m/s2. At this rate, How far does the car move while accelerating
What is the velocity of the coupled boxcars after collision?
A block of mass m = 5.5 kg is pulled up a ? = 26° incline as in the figure with a force of magnitude F = 37 N. Find the acceleration of the block if the incline is frictionless
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