Recent content by gamx

Homework Statement An oxygen supply system mixes oxygen at 105 K and room air at 307 K at equal mass flow rates. What is the temperature of the resulting mixture in K? (c of oxygen = 918 J/kgK, c of air = 1012 J/kgK) Homework Equations Q=mc\Delta T and Q=mL_f The Attempt at a Solution...

mgh_1=mah_2 93 x 9.81 x 1.5 = 0.71 x F F = 1927J Finally got it :D Thx for all the help

I understand the equating p.e to k.e part, but what about scaling the g in proportion? Would you mind elaborating? mgh = .5mv^2 v^2 = 2X1.5g I assume the velocity value i get here is for the deceleration?

Still making no headway on this topic, anyone care to lend a helping hand?

For the 1st question i started off with finding the gravitational potential energy by using E = mgh but i got stuck. The 2nd question involves finding the total energy output divided by energy input to get the efficiency. Kinda stuck :S

[SOLVED] Work, Energy and Power Questions Question 1 A well trained soldier with a combat mass of 93 kg is able to jump from a height of 1.5 m and land safely by squatting down at a uniform rate as he lands. He squats down by 0.71 m. What force (in N) does his legs exert during the squatting...