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A football player punts the ball at a 45.0o angle. Without an effectfrom the wind, the ball would travel 60.0 m horizontally.
(a) What is the initial speed of the ball?
(b) When the ball is near its maximum height it experiences a brief gust of wind that reduces its horizontal velocity by 1.50 m/s. What distance does the ball travel horizontally?
An extremely thin film of soapy water (n = 1.36) sits on top of a flat glass plate with n = 1.51. The soap film has a red color when viewed at normal incidence. What is the thickness of the film
A series AC circuit contains a resistor, an inductor of 210 mH, a capacitor of 5.10 µF, and a source with ?Vmax = 240 V operating at 50.0 Hz. Calculate the resistance in the circuit
A 10,000 kg railroad car is rolling at 1.5 m/s when a 4000 kg load of gravel is suddenly dropped in. What is the car's speed just after the gravel is loaded
A 61-kg and a 97-kg skydiver jump from an airplane at an altitude of 6100 m, both falling headfirst. Calculate their terminal velocities
A 90 kg gentleman standing on slippery grass is pulled by his two rather unruly children.Overlooking friction, compute Pop's resulting acceleration
A large 3kg object hangs from a rope wound on a 40 kg wheel. The wheel has an actual radius of 0.75m and a radius of gyration of 0.60m. Find the angular acceleration and the distance through which the weight will fall in the first 10s.
A uniform soda can of mass 0.138-kg is 11.80-cm tall and filled with 1.30-kg of soda. Then small holes are drilled in the top and bottom (with negligible loss of metal) to drain soda. (Initially the soda can is full.)
Two identical spheres each carry a charge of -40.0 µC. The spheres are separated by a distance of 1.00 m. What is the electric force between the spheres
A parallel-plate capacitor with only air between the plates is charged by connecting it to a battery. What is the dielectric constant of this material
In a heart pacemaker, a pulse is delivered to the heart 81 times per minute. The capacitor that controls this pulsing rate discharges through a resistance of 2.4 x 106. One pulse is delivered every time the fully charged capacitor loses 63.3% of its ..
in an ionic solution 5.8 x 1015 positive ions with charge 2e pass to the right each second while 6.3 x 1015 negative
In a proton accelerator used in elementary particle physics experiments, the trajectories of protons are controlled by bending magnets that produce a magnetic field of 3.60T. What is the magnetic-field energy in a 130 cm^3 volume of space where B=..
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