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A fox fleeing from a hunter encounters a 0.615 m tall fence and attempts to jump it. The fox jumps with an initial velocity of 7.40 m/s at an angle of 45.0°, beginning the jump 1.83 m from the fence. By how much does the fox clear the fence? Treat the fox as a particle.
Two boats start together and race across a 56-km-wide lake and back. Boat A goes across at 52 km/h and returns at 56 km/h. Boat B goes across at 36 km/h, and its crew, realizing how far behind it is getting, returns at 79 km/h. Turnaround times are n..
A velocity selector is connected to a mass spectrometer. The electric field in the velocity selector is 950 V/m. Calculate the radius of the path of a proton
A stone thrown upward from the top of a 100ft cliff at 150ft/s eventually falls to the beach below. (For this problem take the acceleration because of gravity to be -32 ft/s^2; take upwards to be a positive direction.) How long does it take the st..
When the string is pulled a distance of 40 cm in 2.50 s, the wheel turns though 5 revolutions. what is the average angular velocity of the wheel
A platinum resistance thermometer has resistances of 190.0 when placed in a 0°C ice bath and 234.8 when immersed in a crucible containing a melting substance. What is the melting point of this substance
An X-ray photon with a wavelength of 0.240 nm scatters from a free electron at rest. Find the initial momentum of the photon
In 1911, Ernest Rutherford discovered the nucleus of the atom by observing the scattering of helium nuclei from gold nuclei. how close will the helium atom come to the gold nucleus
The distance from the earth to the center of our galaxy is about 23000ly(1yr is 9.47x10^15m), as measured by an earth based observer. how long will it take to make the trip
A pendulum bob passes through the lowest part of its path at speed of 2 m/s. What is the tension in the pendulum cable at this point if the pendulum is 80 cm long
An object of mass m is attached to a horizontal spring, stretched to a displacement A from equilibrium and released, undergoing harmonic oscillations on a frictionless surface with period T0. The experiment is then repeated with a mass of 4m. The sub..
Consider a two lens system, where f1=5 cm f2=-4 cm The distance between the lenses is 15 cm. calculate the position of the image from the first lens
A contact lens is made of plastic with an index of refraction of 1.58. The lens has an outer radius of curvature of +1.99 cm, What is the focal length of the lens
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