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A football is kicked at ground level with a speed of 40.0 m/s at an angle of 35.0° to the horizontal. How much later does it hit the ground?
The fundamental frequency of a standing wave on a 1.3-m-long string is 410Hz. What would be the wave speed of a pulse moving along this string
The figure below shows a mercury barometer. Consider two barometers, one using mercury and another using an unknown liquid. estimate the density of the unknown liquid
The half-life of iodine-131, an isotope used in the treatment of thyroid disorders, is 8.04 days. what is the activity of the sample
A small piece of Styrofoam packing material is dropped from a height of 1.50 m above the ground. Until it reaches terminal speed, magnitude of its acceleration is given by a = g - bv. After falling 0.40 m, the styrofoam effectively reaches its ter..
q1. a typical major league fastball is thrown at about 99 mph and with a spin rate of 103 rpm. if the distance between
We know that a spherical charged particle of will have an external electric field of E = k q/r2, where k = 8.988×109N·m2·C-2 is the Coulomb constant, q is the charge, and r is the distance from the center of the spherical particle.
Two masses of 3 kg and 5 kg collide head-on, the former moving to the right with the speed 5m/s, What amount of mechanical energy is lost
A certain transformer has 500 turns on the primary. If 10 volts are applied to the primary, what was the current in the primary
A particle has a charge of +2.3 ?C and moves from point A to point B, a distance of 0.13 m. The particle experiences a constant electric force, and its motion is along the line of action of the force.
A muon with rest energy 106 MeV is created at an altitude of 4600 m and travels downward toward Earth's surface. What is the muon's total energy in the Earth observer's frame of reference
A 302g ball is tied to a string. It is pulled to an angle of 6.00 degrees and released to swing as a pendulum. A student with a stopwatch finds that 17 oscillations take 12.0s. How long does the string.
A lunar lander is making its descent to Moon Base I. The lander descends slowly under the retro-thrust of its descent engine. What is the speed of the lander
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