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A 2 meter tall basketball player wants to make a goal from 10 meter from the basket. The hoop is 3.05 meter above the ground and the player shoots at a 45o angle so the ball passes cleanly through the hoop. Evaluate what is the initial speed of the basketball?
A 24 g bullet traveling at 178 m/s is fired into a 0.49 kg wooden block anchored to a 100 N/m spring. How far is the spring compressed to the nearest thousandth of a meter
A person of mass 80.0kg stands at the center of a rotating merry-go-round platform of radius 2.50m and moment of inertia 910kg*m^2. Calculate the rotational kinetic energy of the system of platform plus person before and after the person's walk
A Thermopane window of area 6.8 m2 is constructed of two layers of glass, each 5.4mm thick and separated by an air space of 2 mm. If the inside is at 12?C and the outside is at ?36?C, how much heat is lost through the window? The thermal conductivity..
A simple harmonic oscillator consists of a block of mass 4.70 kg attached to a spring of spring constant 230 N/m. When t = 0.890 s, the position and velocity of the block are x = 0.124 m and v = 3.900 m/s. (1) what is the amplitude of the oscillation..
An electric force of 4.0 N exists between two objects separated from each other by a distance of r. If the distance is decreased to 0.50 r, compute the magnitude of the force between the two objects.
Two ice skaters, Daniel (mass 63.1 kg ) and Rebecca (mass 45.9 kg ), are practicing. Daniel stops to tie his shoelace and, while at rest, is struck by Rebecca, What is the direction of Daniel's velocity after the collision
A broad source of light (λ=589 nanometer) illuminates normally two glass plates 12 centimeter long hat touch at one end, Find how many bright fringes appear over the 12 centimeter distance
The owner of a van installs a rear-window lens that has a focal length of -0.300 m. How far from the van is the object actually located
A jogger runs directly east for 4 km, then turns and goes northwest for 6 km. He then travels directly south for 5 km. How far is he from the starting point?
A small camera has a lens with focal length f=15 mm has a movable lens that can be focused on objects as close as 20 cm or as far away as infinity (relative to f). What is the optimum lens-film distance
Unpolarized light in vacuum is incident onto a sheet of glass with index of refraction n. The reflected and refracted rays are perpendicular to each other. Find the angle of incidence. This angle is called Brewster's angle or the polarizing gangly.
While driving on the freeway at 110 km/h, you pass a truck whose total length you estimate at 25 m. A. If it takes you, in the driver's seat, 6.0s to pass from the rear of the truck to its front, what is the truck's speed relative to the road? ..
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