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a) Ocean waves move toward the beach with a speed of 8.90 m/s and a crest-to-crest separatiion of 15.0 m. You are in a small boat anchored off shore. At what frequency do the wave crests reach your boat?
b.) You now lift the anchor and head out to sea ata aspeed of 15 m/s. At what frequency do the wave crests reach your boat now?
A 30 kilogram child moving at 4 meters per second jumps onto a 50 kilogram sled that is initially at rest on a long, frictionless, horizontal sheet of ice determine the speed of the child sled system after the child jumps into the sled.
A wide rectangular channel discharges 1.6 m3/sec per unit width. The slope is 0.001 and the manning's coefficient is 0.015. At a certain point the water depth is 0.75m. How far downstream will it be 0.73m. Use V.T.
Two long, straight, parallel wires of length 4.1 m carry parallel currents of 3.2 A and 1.1 A. What is the magnitude of the force between the two wires
A hydrogen atom has a radius of about 0.05 nm. estimate the electron's kinetic energy in three dimensions.
An astronomical telescope is designed with an overall magnification of 80x. The objective has a focal length of 98.0 cm. How far should the eyepiece be from the objective
Velocity has a magnitude and a vector. consider a boat moving initally with velocity of 30 m/s directly west. What is the change in velocity
consider a head-on elastic collision of two balls. ball a moving at 45 ms collides with ball b which is initially at
a coaxial cable has an inner wire of radius 0.3 mm. with a linear charge density of 4.4e-08 c.m. surrounded by a
At 20.0°C, a mainly silicon resistor has a resistance of335 Ω, and a tungsten resistor has aresistance of 752 Ω. At this temperature, the siliconresistor has a temperature coefficient of resistivity of−0.070°C−1 and the tungsten resistor has acoef..
The concrete wall of a building is 0.10m thick. The temperature inside the building is 20.0 °C, while the temperature outside is 0°C. Heat is conducted through the wall.
The polarizing direction of the first sheet is parallel to the x axis, that of the second sheet is at an angle of 30 degree counter-clockwise from the y axis, and that of the initial third sheet is at an angle of 60 degree counter-clockwise from t..
A 0.460 kg wood block is firmly attached to a very light horizontal spring (k = 160 N/m) as shown in Fig. 6-40. It is noted that the block-spring system, when compressed 5.0 cm and released, stretches out 2.3 cm beyond the equilibrium position before..
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