Q) A 3 g bullet traveling at a speed of 400m/s enters a tree and exits the other side with a speed of 200 m/s. Where did the bullet's lost KE go, and what was the energy transferred?
This is an example prob from my book which says:
Change in KE+Change in Internal Energy=0
Hence, Change in...
hey thanks for your help..
I needed help with some other probs .. i'd appreciate your help
Water runs into a conical tank at the rate of 2 cubic feet per minute. The tank stands point down and has a height of 10 feet and a maximum radius of 5 feet. How fast is the water level rising when the...
Hey.. I'd appreciate it if you could guys could verify my answers for the following questions..
Find dy/dx:
1) y=arcsin(2x)
y'= (2)/sqrt(1-4x^2)
2) y=arctan(x^2)
y'= 2x/(1+x^4)
3) 3sqrt(x)=sqrt(y)
dy/dx=( 3.(x)^(-.5) / (y)^(-.5))
4) xy+y=x
dy/dx = (-y)/(x+y)
5) e^cosy=x^3 arctan...
nevemrind.. I got 8.37 m/sec...
For C) i used v^2= v0^2-2a(y-y0)
v^2= (8.37)^2 - 19.6( 235)
v= 67 m/sec and not 97m/sec
what am I doing wrong?
I apologize for askin you so many qustions.. got a test tomorrow so am trying to make sure I...
I see .. cool thanks..
Another questoin:
A rescue plane wants to drop supplies to isolated mountain climbers on a rocky ridge 235 m below. If the plane is traveling horiszoontally with speed of 250 km/hr ( 69.4m/s) .
A) how far in advance of the receipients must the goods be dropped...
it says that the components are -2450 , 3867 and 2450... Why is the first 2450 a negative?
Would it be possible for you to tell me what the diagram would look like? i'd really appreciate it.
thanks much.
The summit of a mountain, 2450 m above base camp, is measured on a map to be 4580 m horizonttally from the camp in a direction 32.4 degrees west of north. What are the components of the displacement vector from camp to summit? What is its magnitude? Choose the x-axis east, y-axis north and z...
Even though I did this and got the answer, I had a question.. Is using the components of 90-33= 57 degrees north of east correct? shouldn't it yield a different result than 33 degrees east of north? or is it one and the same thing?
Thanks much for your help.
well I have a feeling that my diagram is wrong and hence I wasnt referring to it when I edite dthe answers..
My diagram is setup like this:
starting from the same origin, I have three lines: a, b , c ... A goes north of east at 25 degrees. B goes east of north at 33 degrees and C goes 56...