Recent content by engineer2010

Homework Statement What mass of steam at 100 Celcius must be added to 1.00 kg of ice at 0 Celcius to yield liquid water at 20 Celcius. Homework Equations Q = mL Q = mc(deltaT) change in energy = 0 The Attempt at a Solution Ice m= 1.00 c = 2100 T1 = 0 Tf = L = 333...

Homework Statement A sol;n of 14.05 mL of NaOH is mixed with 50.0 mL of 0.2102 M H2SO4 (standardized) and allowed to react. The sol'n (H2SO4 and NaOH) is still acidic, so it is titrated with 10.55mL of standardized KOH (0.08883M) until the equilivance point is reached. What was the...

O right sorry I forgot to write out the equation for the momentum along y. so in the x equation for example Vax= 0 and simiarly for the y equation? and is the third equation the kinetic energy one?? But I am sill confused as too how i find the direction of the A Ball.

Homework Statement Two billiard balls move of equal mass move at right angles and meet at the origin of an xy coorindate system. Ball A is moving upward along the y-axis at 2.0m/s and ball B is moving to the right along the x-axis with a speed of 3.7m/s. After the collision, assumed elastic...

ok i got it thanks.. i was thinking that there was another force in addition to the 1367. but i figured it out.

Quick help with Power problem! Homework Statement What is the minimum horse power a motor must have to be able to drag a 310 kg box along a level floor at a speed of 1.2 m/s if the coefficient of friction is .45 Homework Equations fg=mg - - - > (c of f) (fn)= Ff P = Fv...

Homework Statement Water falls onto a water wheell from a height of 2.0m at a rate of 95kg/s (a) If this water wheel is set up to provide electricity output, what is the max power output. (b) What is the speed as it hits the wheel? Homework Equations Ep= mgh Ek= 1/2mv^2 The...

Another Problem A watch is tied to a string on an airplane. As the airplane takes off the string makes an angle of 25* to the vertical. The accleration takes about 18s. What is the accleration of the plane. I drew a free body diagram, but I am confused as to how I would solve this...

ok so I used cos10* X 5m and got 4.92N for the tension of one rope so then do i just times it by two and will then have the tension throughtout the entire rope?

Any Help would be appreciated Problem 1: A person is to walk across a high wire strung horiziontally between 2 buildings 10.0 m apart. The sag when she is in the exact center of the rope is 10*. If her mass is 50.0kg what is the tension on the rope? Okay I know that the tension...