a person standing at the edge of a cliff throws a rock directly upward. it observed that 2 seconds later, the rock is it maximum height and that 5 seconds after it reached the highest point, it hits the ground at the base of the cliff. what is the initial velocity of the rock
April 28, 2015
why is the following situation impossible? a normally proportioned adult walk briskly along a straight line in the +x direction, standing straight up and holding his right arm vertical and next to his body so that the arm does not swing. his right hand holds a ball at his side...
August 2, 2014
A +30 µC point charge is placed 32 cm from an identical +30 µC charge. How much work would be required to move a +0.45 µC test charge from a point midway between them to a point 11 cm closer to either of the charges?
October 16, 2013
Last semester, a certain professor gave 26 As out of 332 grades. If one of the professor's students from last semester were selected randomly, what is the probability that student received an A? (Assume that each student receives one grade.)
September 14, 2013
In the drawing, the weight of the block on the table is 380 N and that of the hanging block is 175 N. Ignore all frictional effects, and assuming the pulley to be massless. What is the acceleration of the two block?
July 10, 2013
Singly charged positive ions are kept on a circular orbit in a cyclotron. The magnetic field inside the cyclotron is 0.947 T. The mass of the ions is 3.01×10-26 kg, and speed of the ions is 3.45 percent of the speed of the light. What is the diameter of the orbit? (The ...
June 6, 2012
A 5.0-kg block at rest on a frictionless surface is acted on by forces F1 = 5.5 N and F2 = 3.5 N. What additional horizontal force will keep the block at rest? Answer: F3 = (-7.6 N)
April 20, 2011
How does an individual struggle to gain freedom against the restraints of society? How should I answer this essay question? Could you direct me on how to answer this essay question? I was thinking about how individuals rebel against society to gain freedom, but I think this is...
November 21, 2007
English - Hamlet
What's so significant with the phrase "Who are they?" It's overused in the play and I don't know why they keep repeating it. I know some of the characters have trust issues, but I'd like a detailed explanation as to why. Thanks in advance.
September 7, 2007