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A large church has a niche in one wall. On the floor plaint appears as a semicircular indentation of radius 2.60 m. A worshiper stands on the center line of the niche, 1.90 m out from its deepest point, and whispers a prayer. Where is the sound concentrated after reflection from the back wall of the niche?
initially at time t 0 a particle is moving vertically at 4 ms and horizontally at 0 ms. its horizontal acceleration is
An 83 kg fullback moving east with a speed of 5.4 m/s is tackled by a 96 kg opponent running west at 3.8 m/s, find the velocity of the players immediately after the tackle
A current of 38.9mA flows in a silver wire of diameter 3.33 mm. Find the electric field strength inside the wire
A car is traveling at 58.36 mph. The driver applies the brakes and the car decelerates at 4.25 m/s^2. What is the stopping distance in meters
A very large thin plate has uniform surface charge density σ.Touching it on the right is a long wide slab of thickness d withuniform volume charge density ρE . Determine the electric field (a) to the left of the plane (b) to the right of theslab an..
A 3 x 10^2 kg piano is being lifted at a steady speed from groundlevel straight up to an apartment 10.0 m above the ground. Thecrane that is doing the lifting produces a steady power of 4.00 x10^2 W. How much time does it take to lift the piano?
A large piece of cork weighs 0.200 N in air. When held submerged underwater by a spring scale as shown in the figure shows that the spring scale reads 0.606 N. discover the density of the cork.
a ball of radius 20.0 cm rolls from rest dawn a ramp, how many revolutions does the ball make while it is in the air
In the alpha decay of 211 Bi to 207 Tl two groups of alpha particles with known energies 6.623 and 6.279 MeV, are observed. What is the energy difference between these two states
A cylinder of mass 14.0 kg rolls without slipping on a horizontal surface. At a certain instant its center of mass has a speed of 7.0 m/s. find the translational kinetic energy of its center of mass
In a laboratory experiment, one end of a horizontal string is tied to a support while the other end passes over a frictionless pulley and is tied to a 1.9kg sphere, What is the diameter of the sphere
Two people are running towards each other. They start from rest 100 m apart. Find the position where they run into each other
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