Recent content by ishterz

Ahhh Thank you!

How to show the above equation of x^2tan^2(theta)- (32000)xtan(theta) + (x^2 + 1.12x10^8) = 0

Homework Statement An anti aircraft gun with initial velocity 400m/s at angel theta above the horizontal, and the shells may be assumed to move freely under gravity. The target is a pilotless aircraft which flies at a speed of 100m/s directly towards the gun at a constant height of 3500m. A...

Hello.I have done all the parts and just have problems with the last one. I've pasted the whole question though to include all the details which may be needed Homework Statement The complex number −2 + i is denoted by u. (i) Given that u is a root of the equation x3 − 11x − k = 0, where...

Homework Statement Electrical energy supplied by a high voltage power has a total resistance of 4 ohms. At the input to the line the rms voltage is 400kV and the input power is 500MW Calculate : A) the min voltage that the insulators which support the line must withstand without breakdwon...

I tried finding the force due to the electric field: 170/.005 x 6 x 1.6X10^-19 (I did 6 because there were 6 excess electrons so that means there are 7 in total) =3.264X10-14 Then I tried subtracting the weight of 6 electrons from it. Weight = 9.1x10^-31 x 6 x 9.81 Resultant force =...

Homework Statement An negatively charged sphere of mass 3.3x10^-15 kg is held at rest b/w two parallel plates separated by 5.0mm when the potential difference between them is 170V. How many excess electrons are on the sphere? B) The charged sphere suddenly loses one of its excess electrons...

Homework Statement Em radiation of frequency .88X10^-15 Hz falls upon a surface of work function 2.5 eV. A)Calculate Max KE B) If a nearby electrode is made negative with respect to the first surface using a pd V, what value is required for V if it is to be just sufficient to stop any of...

Vectors-planes and lines -------------------------------------------------------------------------------- 1. Homework Statement Two planes have equations 2x-y-3z=7 x+2y+2z=0 Find a vector equation for their line of intersection 3. The Attempt at a Solution I haven't learned...

Homework Statement Two planes have equations 2x-y-3z=7 x+2y+2z=0 Find a vector equation for their line of intersection The Attempt at a Solution I haven't learned the vector product in class but read it and attempted it and got the direction vector 4i-7j+5k. However, I don't...

Hello, I managed to solve the differential equation : dx/dt= 0.1 (x-250) with the information when t=0 x=1000 and dx/dt= 75, I also found "C" and got ln lx-250l = 0.1t + ln750 However, I am having trouble obtaining the expression for x in terms of t I got x= e^0.1t +1000 which...

I tried posting the picture up but it was unsuccessful. I've pretty much described it in the question though. I don't understand,how is 60 1/5 of 360? isn't it 1/6th ? Why is it saying 1/5th ? =S

Hi, I came across this question on waves which tells you how to calculate the phase difference and the lag time but I don' uderstand why it is 60 degrees.Although I'm notable to draw th diagram,I will write down the explanation What is the phase relationship b/w the two signals?(y1 and y2)...

Hi, I'd like to know why a young modulus for a material is constant whereas the spring constant isn't.Is it because the spring constant depends on the extension which depends on the length and area of the wire?Just wanted to make sure :) Also,I have these two questions I'm not getting the...