Sunday
September 21, 2014

Posts by Bartholomew


Total # Posts: 11

Physics
A neutron collides elastically with a helium nucleus (at rest initially) whose mass is four times that of the neutron. The helium nucleus is observed to move off at an angle of 45 degrees. The neutron's initial speed is 5.9×105 m/s. Determine the speeds of the ...
October 8, 2010

Physics
A bullet of mass 1.9×10−3 kg embeds itself in a wooden block with mass 0.987 kg, which then compresses a spring (k = 120 N/m) by a distance 3.5×10−2 m before coming to rest. The coefficient of kinetic friction between the ...
October 8, 2010

Physics
#1. Ten Christmas lights are connected in series and plugged into a 120 V wall outlet. Each light is identical and can be thought of as a resistor. a) What should the value of this resistance be if the total string is to dissipate 50 W? b) How much power is dissipated in each ...
September 20, 2010

Physics
I plugged in my value for x, but both sides of the equation had different values, so I think I have the wrong value for x. How do I solve 200x^2-49x+490?
January 15, 2009

Physics
A 5 kg mass is thrown up with a velocity of 4 m/s from a height of 30 m onto a spring with a relaxed length of 10 m, and a constant of 400 N/m. What will the maximum compression of the spring be? What will the speed of the object be when the spring is compressed 0.3 m? HERE&#...
January 15, 2009

10th grade
There are 3 feet in a yard. Square yards to get square yards.
January 15, 2009

Physics
(V2^2)=(Vi)^2+2ad 0=16-19.6d -16=-19.6d d=0.816 m + 30 m = 30.816 meters above the ground mgh = mgh + 1/2kx^2 = (5 kg)(9.8 m/s^2)(30.816) = 200x^2-49x+490 x=2.75 m mgh=1/2kx^2+mgh+1/2mv^2 (5)(9.8)(30.186)=1/2(400)(0.3)^2+(5)(9.8)(9.7)+1/2(5v^2) v=20.17 m/s
January 15, 2009

Physics
A 5 kg mass is thrown up with a velocity of 4 m/s from a height of 30 m onto a spring with a relaxed length of 10 m, and a constant of 400 N/m. What will the maximum compression of the spring be? What will the speed of the object be when the spring is compressed 0.3 m?
January 15, 2009

algebra
Sorry about the lines, I was expecting it to look like this: img517.imageshack.us/img517/9280/picture1in2.png
October 19, 2008

algebra
ANSWER A = 133.333333 B = 33.3333333 C = 13.3333333 WORK A = 4B C = B-20 A + B + C = 180 | | | | (4B) + B (B-20) = 180 \ | / \ | / \ | / \ | / \ | / \|/ 6B - 20 = 180 B = 33.33333 ^ A is 4 times that C is 20 less than that
October 19, 2008

PHYSICS
A 50 kg block is on a 30 degree incline. The coefficient of friction between the block and the incline 0.05. If it is given an initial velocity of 10 m/s up the incline, how far will it travel until it stops?
October 19, 2008

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