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A juggler throws a ball straight up into the air and it takes 4.20 seconds to reach its peak. How many seconds will it take after that to fall back into his hand? Assume he throws and catches the ball at the same height.
Consider a 1-D NaBr lattice. The frequency at the optical mode at k=pi/a is f=10.1THz. find the frequency for the optical mode at band center (k=0)
A stamp collector views a 1.5 cm tall stamp through a magnifying glass. The magnifying glass is a converging lens with a focal length of 15 cm. The stamp is 3 cm below the lens. (a) Sketch a ray-tracing of this situation. (b) Where is the image of th..
A photon with a wavelength of 3.70×10?13 m strikes a deuteron, splitting it into a proton and a neutron. calculate their speeds after the photodisintegration
A block of mass m = 4.2 kg, moving on a frictionless surface with a Vi=2.9m/s speed makes a perfectly elastic collision with a block of mass M at rest. After the collision, the 4.2 block recoils with a speed of 0.9m/s. The mass M is closest to.
A laser beam aimed from the earth is swept across the face of the moon. what is the angle of divergence of the laser beam
you are outside tossing a football with your friends. you throw the football at an angle of 52.3deg above the
a cylindrical wheel is rotating with a constant angular acceleration of 4.0 rad/s^2. At the instant it reaches an angular speed of 2.0 rad/s, What is the radius of the wheel
A boy of mass 60.8 kg is rescued from a hotel fire by leaping into a firefighters' net. The window from which he leapt was 9.5 m above the net. What is the average force on the net due to the boy during the interval
q1. a horizontal pipe contains water at a pressure of 150 rm kpa flowing with a speed of 1.6 rm ms. the pipe narrows to
A roller coaster is traveling along a vertical circular loop, How much work is done by the frictional force from Position 1 to Position 2
A car with a mass of 950 kg is moving to the right with a constant speed of 1.69 m/s, What is the total force on the car if it is moving to the left
David is driving a steady 25 m/s when he passes Tina, who is sitting in her car at rest. Tina begins to accelerate at a steady 2.8 m/s^2 at the instant when David passes.
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