Homework Statement
What power is needed to move a 3000lb car up an 8 degree incline with a constant speed of 50mi/h against a frictionless force of 80lb?
ans. 68hpHomework Equations
P = Fv
1hp = 550 lb-ft/sThe Attempt at a Solution
1st i draw free body diagram
summation of force in the...
I have a problem that involves these questions, what i need you to do is to verify if the textbook answers are typographical errors. Ill show my solutions and have to tell me which part i get wrong.
Homework Statement
1. A corner lot is 35m on one street and 25m on the other street. The...
is it between the diverging and converging lens?
this is how i do to find the image distance of the divergng lens
between C lens and D lens (110cm)
but there is an image distance q1 from the C lens (120cm)
the object distance from the D lens p2 might be (110cm - 120cm)(1/q2) + (1/(110-120)) =...
Homework Statement
http://www.imageurlhost.com/images/r0its2lyef7v3s0ppms2.pngHomework Equations
Mirror Equation
(1/q) + (1/p) = (1/f) = (2/r)
Magnification
M = (q/p)
for two lenses
M1 & M2
Total magnification = M1*M2The Attempt at a Solution
we have p1 = 40cm and f1 = 30cm
then the image...
Homework Statement
An alternating voltage is given by v = 30\sin(314t).The time taken by the voltage to reach 30V for the first time is:
A. 0.02s
B. 0.03s
C. 0.1s
D. 0.015s
Homework Equations
google for equation for instantaneaous current and voltage
The Attempt at a Solution
30 = 30sin(314t)...