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Q1. A jewel thief hides a diamond by placing it on the bottom of a public swimming pool. He places a circular raft on the surface of the water directly above and centered over the diamond. If the surface of the water is calm and the pool is h = 1.52 m deep, find the minimum diameter of the raft that would prevent the diamond from being seen.
Q2.A 18.00 kg lead sphere is hanging from a hook by a thin wire 3.60m long, and is free to swing in a complete circle. Rapidly it is struck horizontally by a 7.00kg steel dart that embeds itself in the lead sphere. What should be the minimum initial speed of the dart so that combination makes a complete circular loop after the collision?
If a metal wire carries a current of 23.0 mA, how long does it take for 12.0×1020 electrons to pass a given cross-sectional area anywhere along the wire? The magnitude of the charge on an electron is 1.6 × 10-19 C.
An aquarium contains a 5-cm layer of water (n = 1.333) floating on top of carbon tetrachloride (n = 1.461). If an angle of incidence into water from the carbon tetrachloride is 20, what is the angle of refraction into the air.
The magnitude of the acceleration due to gravity
What is the coefficient of kinetic friction
A hockey stick is swung with the average angular acceleration of 1.5 rad/s2. What is the angular velocity of the stick as it strikes the ball at the end of 0.8 second swing.
Find out the magnitude of the charge on the moving particle. The baby soon learns to bounce with utmost amplitude and minimum effort by bending her knees at what frequency.
How much time takes to release net radiant energy from body
Determine the greatest vertical displacement of the pendulum
Compute the coefficient of kinetic friction
What is wind velocity
If the beam now strikes the top of a building standing directly at the water's edge, find out the height of the building.
Standing at a crosswalk, you hear a frequency of 520 Hz from the siren of an approaching police car. After the police car passes, observed frequency of the siren is 455 Hz. Establish the car's speeds from these observations.
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