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You are sitting in a stationary boat and your friend is sitting in another boat nearby. Ocean swells (long waves) are passing by. You notice that whenever you are at the crest of a wave (i.e. the crest is passing under you) your friend is at the crest of the next wave. The boats are 8 m apart. You time the waves and find that the time between the arrival of each crest is 4 s. What is the wavelength of the ocean swell?
What is the period of the swell?
What is the frequency of the swell?
How far does a crest travel in 4 s? What do you conclude is the speed of the waves?
what is the horizontal distance x between the two balloons.
A diesel engine does not use spark plugs to ignite the fuel and air in the cylinders. at the place of, the temperature required to ignite the fuel occurs because the pistons compress the air in the cylinders.
Two identical aluminium objects are insulated from their surroundings. Object A has a net charge of excess electrons. Object B is grounded. Which object is at the higher potential.
A solenoid of length 4.0 cm and diameter 0.93 cm is wound with 165 turns per cm. What is the induced emf in one of the windings
A friend speeds by you in her spacecraft at a speed of 0.770 c. It is measured in your frame to be 4.70m long and 1.45m high. What will be its length at rest
At time t=0 a grinding wheel has an angular velocity of 27.0rad/s, At what time does the wheel stop
Suppose that the sound level of a conversation is initially at an angry 70 dB and then drops to a soothing 50 dB. Assuming that the frequency of the sound is 500 Hz, determine the (c) initial and (d) final sound wave amplitudes.
A simple pendulum consists of a bob of mass 1.8kg attached to a string of length of 2.5m. The pendulum is held at an angle of 30 degrees from the vertical by the light horizontal string attached to a wall.
A 0.25 m long wrench is placed around a bolt and a 20 N force is applied halfway along the wrench at an angle of 30 degrees, What is the torque (in Nm) applied to the bolt from this force
River Pascal with a volume flow rate of 3.4x10^5 L/s joins with river Archimedes, which carries 1.12x10^6 L/s, to form the Bernoulli River. What is the speed of the water in the Bernoulli River
A 63.00 kg person on skis starts from rest down a hill sloped at 33° from the horizontal. The coefficient of friction between the skis and the snow is 0.190.
A 73 trampoline artist jumps vertically upward from the top of a platform with a speed of 4.0. If the trampoline behaves like a spring of spring constant 6.2×104, how far does he depress it.
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