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Select two objects with flat surfaces such as books with different covers, for instance hard back and paperback. You will also need an inclined surface which can be tilted, such as a larger book or a small table.
Form a hypothesis concerning the coefficient of static friction. Does the coefficient of static friction depend on the nature of the surface, for instance the surface of the table top, the surface of the sliding objects, or on both surfaces? Which case corresponds to both objects beginning to slide at the same angle, and which corresponds to the objects beginning to slide at different angles?
Use the angle of repose (θr) and the tangent function,µ=tan(θr), to find the coefficient of static friction in both cases. Was your hypothesis supported or contradicted by the experiment?
how much time passes before the brick lands on the ground. If the wind speed is 26 mph, find the velocity of the plane in still air.
A 2.0 m long rod has a density explained by λ = a + bx, where λ is the density in kilograms per meter of length, a = 5.0 kg/m, b =4.0 kg/m2, and x is the distance in meters from the left end of the rod. The rod rests horizontally with its ends each s..
A vector has an x component of -27.5 units and a y component of 35.8 units. Find the magnitude and direction of this vector
A straight wire segment 3 m long makes an angle of 30° with a uniform magnetic field of 0.37 T. Find the magnitude of the force on the wire
Zach, whose mass is 64kg , is in an elevator descending at 10m/s. What is Zach's apparent weight while the elevator is braking
A 73.7-kg person puts on a life jacket, jumps into the water, andfloats. What is the density of the life jacket
A generation is about one third of a lifetime. Approximately how many generations have passed since the beginning of recorded history (of the order of 1011 s)? Half the life expectancy of a human is of the order of 109 s.
A tennis ball may leave the racket of a top player on the servewith a speed of 67.0 m/s. what is the average force on the ball
A 66 kg solid sphere with a 14 cm radius is suspended by a vertical wire. What is the period of the oscillations
A metal ball with a mass of 3.71·10-6 kg and a charge of +5.77 mC has a kinetic energy of 4.99·108 J. It is traveling directly at an infinite plane of charge with a charge distribution of +3.21 C/m2. If it is currently 1.87 m away from the plane of c..
Write a nuclear reaction for the neutron-induced fission of U-235 to produce Te-137 and Zr-87 How many neutrons are produced in the reaction
a 10 atmospheric dump valve adv at a pwr relieves steam at 1100 psia when the enthalpy required to make a pound of
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