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Q1. What is the wavelength of the waves emitted by source? What is the difference in frequency between directly radiated waves and the waves reflected from a whale travelling straight toward the ship at 4.99? Suppose that the ship is at rest in the water.
Q2. At one point in a pipeline, water's speed is 3.89 m/s and the gauge pressure is 4.00×10^4 Pa. Find out the gauge pressure at a second point in the line 14.0 m lower than the first if the pipe diameter at the second point is twice that at the first.
What is the average force exerted on the ball. How fast (in ) must a centrifuge rotate if a particle 6.50 from the axis of rotation is to experience an acceleration of 125,000 's.
A 0.60 nF parallel-plate capacitor has plate area A = 1.4×10?4 m. what is the plate separation
A woman stands at the edge of a carousel that is rotating without friction at 0.80 rad/s. The carousel has a radius of 2.0m and a moment of inertia of 600 kg m2. What is now the angular speed of the carousel
A certain hydrolic system is designed to exert a force 108 times as large as the one put onto it. What must be the ratio of their diamerters
A petite young woman distributes her 550{\rm N} weight equally over the heels of her high-heeled shoes. Each heel has an area of 0.650{\rm cm^2}. What pressure is exerted on the floor by each heel
If it actually hits the ground with a speed of 7.80 m/s, what is the magnitude of the average force of air resistance exerted on it
A tank of water sits at the edge of a table of height 2m. The tank springs a very small leak at its base, and water sprays out a distance of 1.4 m from the edge of the table. What is the water level h in the tank? (Assume the tank is open to the a..
A 4.3-kg solid sphere, made of metal whose density is 4700 kg/m3, is suspended by a cord. Find the density of the liquid
A proton moving with a speed of 4.00 · 105 m/s in the positive y-direction enters a uniform magnetic field of 0.400 T pointing in the positive x-direction
Two small frogs simultaneously leap straight up from a lily pad. Frog A leaps with an initial velocity of 0.676 m/s, what is the position and velocity of the other frog
A 0.840-kg block oscillates on the end of a spring whose spring constant is k= 42.0 N/m. What is the fractional decrease in amplitude per cycle
A projectile is ?red into the air from ground level over level ground. The initial speed of the projectile is 30 m/s, Where does the center of mass of the projectile land
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