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How would you expect the circumference of a tree trunk to vary with height above the ground? How would the circumference of a tree branch vary as its distance from the trunk increased? Would the equations of engineering mechanics and strength of materials show a relationship with (a) geometry, (b) shape, and (c) force-gravity and wind? What role would be played by the desire of the tree for sunlight and water?
One fires a bullet (m=50g) at a block of wood (m=2kg) resting on a frictionless surface. How much energy is lost
A small bulb is rated at 7.5 W when operated at 125 V. The tungsten filament has a temperature coefficient of resistivity a = 4.5 ? 10-3 / °C. What is the resistance of the filament (in ohms) at room temperature
Two positive point charges, qA and qB, (masses mA and mB) are at rest, held together by a mass less string of length a. How fast is each one going, when they are far apart
Objective questions based on kinematics.
A uniform linear charge of 2.0 nC/m is distributed along the x-axis from x = 0 to x = 3 m. Find the integral is for y component of electric field at y = 4 m on the y-axis.
A train moving with constant velocity travels 190mnorth in 11s and an undetermined distance to the west. The speed of the train is 33m/s. How far west has the train traveled in this time
two identical metal spheres a and b are connected by a metal rod. both are initially neutral. 1.6times1012 electrons
q1. two 53 rm g blocks are held 30 rm cm above a table. one of them is just touching a 50-long spring. the blocks are
A uniform electric field has a magnitude 330 N/C and is directed along the +y-axis. what is the change in potential energy for this charge
Julie throws a ball to her friend Sarah. The ball leaves Julie's hand a distance 1.5 meters above the ground by an initial speed of 21 m/s at an angle 58 degrees; with respect to the horizontal. Sarah catches the ball 1.5 meters above the ground. Wh..
The Lunar Lander of mass 1.9Ã?104kg made the last 150m of its trip to the Moon's surface in 120s, determine the upword force required to decend at a constant speed
A wooden block weighing 9 N is at rest ontop of a wooden desk. The coefficient of static friction betweenthe block and the desk is 0.54. Find the minimum horizontal force required to move the block if the following occurs.
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