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A sailor strikes the side of his ship just below the surfaceof the sea. He hears the echo of the wave reflected from the oceanfloor directly 3.09 s later. How deep is the ocean at this point?
The range of human hearing extends from approximately 20 Hz to 20,000 Hz. Find the wavelengths of these extremes at a temperature of 20°C. 20 Hz m 20000 Hz m
A nearsighted person wears contacts with a focal length of ? 6.5cm, what is her uncorrected far-point distance
A ball is thrown upward,. At 5.00 m above its launch point, the ball's speed is one-third its launch speed. What maximum height above the launch point does the ball attain
Two disks are rotating about the same axis. Disk A has a moment of inertia of 3.7 kg · m2 and an angular velocity of +7.0 rad/s. Disk B is rotating with an angular velocity of -9.6 rad/s. The two disks are then linked together without the aid of a..
A 2200 kg car moving east at 10.0 m/s collides with a 3000 kg car moving north. Find the speed of the 3000 kg car before the collision
Two resistors of wattage 100 W each is connected in series with a source. Find the total watage of load connected in circuit
What is vertical component of the acceleration
A uniform ladder 10.0 m long is leaning against a frictionless wall at an angle of 60.0° above the horizontal. find the magnitude of the frictional force exerted on the ladder
A child whose weight is 284 N swings out over s pool of water usinga rope attached to the branch of a tree at the edge of the pool. Find the speed of the child at the surface of the pool
A drug prepared for a patient is tagged with 9943Tc which has a half-life of 6.05 h. What is its activity at the time it is injected
A particle of mass m strikes a wall at an angle θ with respect to the normal. The collision is inelastic with coefficient of restitution E. Find the rebound angle of the particle after collision with the wall.
An ideally efficient airplane engine provides work as heat flows from 1400 K burned gases to 260 K air
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