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A kingfisher is hovering 30m above a lake when it drops a fish its carrying. A second kingfisher, 5.0m above the first dives toward the falling fish with an initial downward velocity. The second kingfisher falls freely. What initial speed should it have if it is to reach the fish just before the fish hits the water?
Zinc has a work function of 4.30 eV. A 4.80 eV photon strikes the surface and an electron is emitted. What is the maximum possible speed of the electron
Two sources produce electromagnetic waves. What is the energy of a photon from source B
A projectile is fired with an initial speed of 61.7m/s at an angle of 31.9^\circ above the horizontal on a long flat firing range. Determine the maximum height reached by the projectile
A massless spring is compressed between blocks of mass x and 5x on a smooth horizontal frictionless surface. What fraction of the total energy does the small block recieve
question1. write a general expression of the flux f received from the sun as a function of luminosity of the sun l
An electron in a picture tube moves with an acceleration of 7.0 × 1016 m/s2. What is the magnitude of the electric field in the tube
A block is pushed up a 20 degree friction-less incline with an initial speed 12.0 m/s. How high up the plane does the block slide before coming to rest
An astronaut on the Mars attaches a small brass ball to a 1.00- length of string and makes a simple pendulum. She times 13 complete swings in a time of 35.4 seconds. From this measurement she calculates the acceleration due to gravity on the Mars.
A golf ball strikes a hard, smooth floor at an angle of ? = 32.4° and, rebounds at the same angle. What is the magnitude of the impulse applied to the golf ball by the floor
Note the gravitational acceleration of equatorial sea level is g = 32.0088ft/s^2 and that its variation is 0.003ft/s^2/ 1000ft ascent. find the height in miles above its point for which g = 30.504 ft/s^2 and what is the weight of a 180lb man on top o..
The storage of radioactive waste is a massive problem in the nuclear industry. how much waste will spill over the top if the lid becomes loose
Plane-polarized light passes through two polarizers whose axes are oriented at 35.0 degrees to each other. what was the polarization direction of the original beam
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