Recent content by shahin93

Homework Statement The nucleus of a helium atom contains two protons. In a simple model of this nucleus, the protons are viewed as point particles separated by a distance of 1.0 fm (1.0 x 10^-15 m). What is the electric potential energy of the two protons? please do step by step.

Homework Statement how do i find the least n such that sqrt(x^3+x^2+3) is O(x^n)? is the reverse the same?

Homework Statement Consider the three charges in the figure below with Q1 = 2.8 µC, Q2 = 4.4 µC, and Q3 = -3.7 µC. A fourth charge q = -4.8 µC is brought from very far away and placed at the origin. http://www.webassign.net/giocp1/18-p-009.gif How much work is required in this process? How...

i tried that, i didnt get the right answer, can u show me your steps?

Homework Statement A particle starts from the origin with velocity 5 m/s at t = 0 and moves in the xy plane with a varying acceleration given by a = (9*squareroot*t)j, where "a" is in meters per second squared and t is in seconds. Determine the velocity of the particle as a function of...

Homework Statement Your moving company runs out of rope and hand trucks, so you are forced to push two crates along the floor as shown in the figure below. The crates are moving at constant velocity, their masses are m1 = 49 kg and m2 = 29 kg, and the coefficients of kinetic friction between...

what does that equation even mean? Are the "x" and "y" the time intervals?

Homework Statement A rabbit runs in a straight line with a velocity of +1.5 m/s for a period of time, rests for 10s, and then runs again along the same line at +0.60 m/s for an unknown amount of time. The rabbit travels a total distance of 1200 m, and its average speed is 0.80 m/s. (a) What is...