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Determine the average pressure on the soles of the feet of a standing 81.3 kilogram person due to the contact force with the floor? Each foot has a surface area of 0.02 m2.
If the tension in a guitar string is increased by 20%, by what percentage does the wave speed increase? Harmonic waves are produced by a source that isoscillating in SHM. Which one of the following statements is correct concerning harmonic waves?
two capacitors are connected in parallel across the terminals of a battery. one has a capacitance of 2.0 microf and the
A 1200 kg car carrying four 77 kg people travels over a rough "washboard" dirt road with corrugations 4.0 m apart which causes the car to bounce on its spring suspension. By how much does the car body rise on its suspension owing to this decrease i..
A rock climber throws a small first aid kit to another climber who is higher up the mountain. What is the vertical height between the two climbers
A railroad car of mass 2.3 104 kg moving at 2.50 m/s collides and couples with two coupled railroad cars, What is the speed of the three coupled cars after the collision
What is the minimum rate of rotation, in revolutions per minute, required for the spheres to contact the cylinder wall
the wingspan tip-to-tip of a boeing 747 jetliner is 59 m. the plane is flying horizontally at a speed of 300 ms. the
A projectile is launched from ground level with an initial speed of 52.2 m/s. Find the launch angle (the angle the initial velocity vector is above the horizontal) such that the maximum height of the projectile is equal to its horizontal range. (I..
a mass at rest on a frictional metal flat circular plate radius 2m slides when the angle to the horizontal is raised
A street lamp weighs 180 N. It is supported by two wires that form an angle of 150° with each other. The tensions in the wires are equal.
a heat engine absorbs 120 j of heat from the hot reservoir and releases 60 j of heat to the cold reservoir during each
A sound wave is travelling trough a fresh water pool with a speed of 1482 m/s. what is the pressure amplitude of the wave
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