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A stone is dropped in the water from a bridge at a height of 44.5 m above the water. Another stone is thrown vertically down 1.00 s after the first one. Both hit the surface of the water at the same time. What is the initial speed v of the second stone if the acceleration of gravity is -9.8 m/s^2?
An ultrasonic transducer, of the type used in medical ultrasound imaging, is a very thin disk (m=0.10g ) driven back and forth in SHM at 1.0 MHz by an electromagnetic coil, What is the maximum oscillation amplitude that won't rupture the disk
Determine the magnetic force on an identical particle when it travels through the same magnetic field with a speed of 5.44 m/s at an angle of 32.2° relative to the magnetic field
Suppose that charges on a dipole antenna oscillate slowly at a rate of 1 cycle/s, What is the magnitude of the Poynting vector
A particular race car can cover a quarter-mile track (402m)in 6.40s starting from a standstill. what horizontal force must the road exert on the tires
A supertrain of proper length 205 m travels at a speed of 0.87c as it passes through a tunnel having proper length 74 m. How much longer is the tunnel
A skier is gliding along at 3.0 m/s on horizontal, frictionless snow. He suddenly starts down a 10° incline. His speed at the bottom is 15 m/s. How long does it take him to reach the bottom
Suppose that 36 g ofHg(mercury) at -39°C are dropped into a big bowlthat contains a mixture of water and ice in thermal equilibrium. How much additional ice will be formed
In 9.00 days the number of radioactive nuclei decreases to one-eight the number present initially
A moving particle encounters an external electric field that decreases its kinetic energy from 9820 eVto 7470 eV as the particle moves fromposition A to position B. The electric potentialat A is -51.0 V, and the electric potential at B is +28.9 V.
A stick is resting on a concrete step with 2/5 of its length hanging over the edge. A single ladybug lands on the end of the stick hanging over the edge, and the stick begins to tip. obtain the magnitude of the angular acceleration of the stick
Starting with the three particle system, find the change in electric potential energy if the alpha particle is allowed to escape to infinity while the two protons remain fixed in place. (Throughout, neglect any radiation effects.)
the height of a helicopter above the ground is given by h 2.95t3 where h is in meters and t is in seconds. at t 2.50
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