Recent content by etagg

ohhh so then the full rotation is 4*22s= 88s and then divided by two pi is the frequency? Thanks so much for your help jdstokes

Well i knew that the voltage across and inductor leads by 90 degrees, which is why i used the equation V=V_(max)sin(wt+90). If the voltage leads the current by 90 degrees, it means that when the voltage is a maximum the current is zero. I am not sure how that would help me?

Homework Statement The voltage across and inductor reaches its maximum value 22ms before the current supplied by the generator reaches its maximum value. What is the lowest possible frequency at which the generator operates? Homework Equations I used the equation V=V_(max)sin(wt+90)...

I think the electric field could only be zero to the left of the origin, as i stated in my solution attempt. I just don't know how to precisely find that place.

Homework Statement Three point charges are on the x-axis at 0m, 0.2m, and 0.4m, with charges -19microC, +19microC, and +19microC respectively. There are two places where the electric field is zero. One is between 0.2 and 0.4m. Where is the other place? Homework Equations i used the...

I don't think i understand. I assumed the mass given was the mass of the balloon and cargo fully inflated? perhaps that was incorrect. If i understood your hint correctly, i changed my equation to read: (p_f)(g)(V)=(m_B+m_a)(g) where m_B is the mass of the balloon and m_a is the mass of...

1. Homework Statement A hot-air balloon plus cargo has a mass of 1890kg and a volume of 11430m^3. The balloon is floating at a constant height of 6.25m above ground. What is the density of hot air in the balllon? 2. Homework Equations : The force of buoyancy is equal to...

ohhhh, what a stupid mistake. I mistakenly factored 0.9 when i should not have. Goes to show what happens when you look at a problem for too long! thanks for your help.

Im confused by this question: A block of wood floats above water with 90% of its volume submerged. Oil with a density of 875kg/m^3 is then poured over the block so that it covers the entire block. Find the fraction of the block now submerged in water. I know that the fraction of the block...