Recent content by homevolend

√3 / 2 would be the y coordinate of pi/3. Just not sure how that coordinate can make the argument pi/3?

Homework Statement Write z = 1 + √3i in polar form Homework Equations z = r (cos\varphi + sin\varphii) The Attempt at a Solution Found the modulus by |z| = √4 = 2 Now I am stuck on this part of finding the argument: Tan-1 (√3) now I am not sure how to go from that to...

Well, we did not get the concentrations. We put the NaOH in a burette then recorded the initial and final volume. Also recorded the amount of acetic acid used. I think some are calculating moles by using the number 22.4 not sure what that means though?

a = GM/R2 g = (1/6)(9.81) = X m/s2 r = (1/3.65)(6.378x106) = Y m m/r2 = a/G m/(Y)2 = X/ (6.67x10-11) m = ANS kg

Ok well you can you can set Fg equal to Fc. Fg = Fc G msmm/r2 = mm4π2r/T2 Simplifies to G Ms = 4π2r3/T2 So (6.67x10-11) Ms = 4(3.14)2(2.18x1011)3/(52980480)2 Ms = UDOIT kg

Homework Statement Calculate the moles of NaOH in the reaction of NaOH + acetic acid. This is a titration where the NaOH neutralized the acetic acid. It took 0.02 L of NaOH to neutralize 3 ml of acetic acid. I just do not know what to do, have been trying for a few days and can't seem to...

a = F/m ?

What I like about English is that most of the phrases are the same for both masculine and feminine cases. If you look at slavic languages there are different words for the masculine and feminine cases.

Ok re did and got this for the x and y components vx = vcosθ v1y=vsinθ v1y=5.21 m/s and vx=29.54 m/s now for next part I did: dx=vx(t) 20=29.54(t) t=0.677 sec v2y=v1y+(g)(t) v2y=5.21+(-9.81)(0.677) v2y= -1.4 m/s v2=√ 29.542+(-1.4)2 v2=29.5 m/s tan-1(-1.4/29.54)=θ...

Homework Statement A hockey player shoots hockey puck towards net. The net is 20 metres infront of the player. If the puck leaves hockey stick at 30 m/s and 10° above ice. Find x and y components of the velocity. If the goalies catches puck just infront of net calculate final velocity of the...

y = 2 [x-y=1] -1 [2x+y=-4] 2x-2y=2 -2x-y=4 -------- -3y=6 y=-2 1[x-y=1] 1[2x+y=-4] x-y=1 2x+y=-4 -------- -x=-3 x=3 I think I did x wrong somehow but don't know what, but I think I did y right. like that??

Homework Statement The solution (x,y) of the system equations define by x-y=1 and 2x+y= -4 is what Homework Equations The Attempt at a Solution I found x and y intercepts of these and plotted it but don't know what it means by finding the solution.

Homework Statement How many times quiter or louder is a sound at 1. 80 dB 2. 30 dB than a sound 50 dB Homework Equations dB2=dB1-dB2? The Attempt at a Solution Would this just mean 1. 30 dB louder 2. 2 dB softer? Or how would I finds "times louder". Sorry for bad...

Homework Statement A wave in a ripple tank moved from deep to shallow water with angle of incidence of 70' and angle of refraction of 55'. What are ratios in two media of the frequencies, velocities, wavelengths. What does it mean by the ratio? Homework Equations sinθ1/sinθ2=v1/v2...

Homework Statement A wire carries a current from left to right, thru a magnetic field which has direction towards you. What is direction of magnetic force on the wire, draw diagram. Homework Equations The Attempt at a Solution I not sure how to do the right hand rule in this...