Ok, I have a problem...
I have a buffer consisting of acetic acid and sodium hydroxide to which I add HCl (solution 1) and NaOH (solution 2). I'm supposed to find the moles of HCl produced and the moles of NaOH produced in each one. I know the volume of acetic acid is 25.00mL and the volume of...
-Substitute (D(t)/2)^3 for r in V=4/3 (pi)r^3.
-When simplified you get pi/6(D(t))^3.
-Differentiate and you get V'= pi/6[3(D(t))^2] [D'(t)] (implicit diff.)
-plug in the numbers--remember any variable with the ' means it's a rate, a unit over time
- I got 3.8197 ft/min. but if you have...
This one's tough. Have you drawn it out for yourself? If you did, you know you'd have some sort of trig relationship relating the hypotenuse the opposite side and angle theta. I'm wondering, since they gave you Y but not theta, if you should use arcsine (inverse trig relation) to find theta...
The angle of elevation of the Sun is decreasing at a rate of 0.25 rad/h. How fast is the shadow cast by a 400-ft-tall building increasing when the angle of elevation of the Sun is π/6?
I thought about using the special triangle to find exact values for trig functions at π/6 but I don't know...
I don't really know how you should go about simplifying this expression yet, but I do believe your first step is wrong.
See, the way you factored it, when you expand it again the expression would be : (abu + abv) x (cdu + cdv)
Find an equation of the tangent line to the curve with parametric equations x=tsint, y=tcost at the point (0,-π).
went dy/dt / dx/dt --> cost - tsint/sint + tcost
t not given so figured it could be:
x=t(sin(1)) --> t= x/sin(1)
or
y=t(cos(1)) --> t= y/cos(1)
wondering if...
What happens to the 1/2 in the KE equation? Is that included too? And once I get this equation, do I simultaneously solve for the unknown with the other equation? There's a problem if I do that. I won't have like terms...unless I factor...because the variables are squared. I'm still not any...
Hey hey!:biggrin:
A 10g object moving to the right with a speed of 20cm/s makes an elastic head-on collision with a 15g object moving in the opposite direction with a speed of 30cm/s. Find the velocity of each object after the collision.
So I have to come up with two equations and solve for...
How do I correctly differentiate this using implicit differentiation:
xy^1/2 = 1 + x^2y
I got to here before I started wondering how I would properly isolate y':
((1/2xy)^-1/2)y + y'x = 2xy + x^2y'
How far off the beaten path...
General question regarding "Momentum"
Hi! :smile: Is it possible to have negative momentum?
I would think that as long as it's before a collision, this is not possible because an object would be moving forward, therefore having a positive velocity. After a collision (given that it is...
Hello!
I was given two formulae for my Physics lab: ma=mg-T and T=Ma (using a pulley).
ma--> net force on small object (paper clip)
M--> larger mass (glider)
mg--> force of gravity
a--> acceleration
T--> tension of ribbon used
I'm...
I keep getting a negative root when I try to do the quadratic formula. WHY? Wait, I tried a different formula and now I get negative time which is impossible. Are you sure it's supposed to be -10m/s?