Recent content by hey123a

Okay i got the answer, thank you. the internal resistance is 0.917 ohms, but can you please derive how you got \frac{ΔV}{ΔI} ? thank you

If the same battery is used, shouldn't the current in both cases be the same? Also here is a drawing of the circuit

also, the answer to this question is 0.917

I did do that. I feel like this question is impossible? So, terminal voltage = IR when using 10ohm resistor terminal voltage = 11 = I(10) when using 100ohm resistor terminal voltage = 11.9 = I(100) current should be the same in both cases, but when solving for current it isn't the same?

Homework Statement When a 10 ohm load is placed across the terminals of a battery, the terminal voltage is 11.0V. When a 100 ohm load is used instead, the terminal voltage is 11.9V. What is the internal resistance of the battery? Homework Equations V=IR The Attempt at a Solution...

Homework Statement A large wheel has a radius of 7.1 m. A rope is wrapped around the edge of the wheel and a 7.6 kg box hangs from the rope. A smaller disk of radius 1.38 m is attached to the wheel. A rope is wrapped around the edge of the disk as shown. An axis of rotation passes through the...

ah okay i think i got it m1v1o + m2v2o = (m1+m2)vf where m1 is the sled, and m2 a mass that is equal to the sled m1v1o = (m1+m2)vf m1v1o = 2mvf m1v1o/2m = vf v1o/2 = vf original ke = 1/2mv^2 KE of sled + load = 1/2(2m)(v1o/2)^2 ke of sled + load = 1/2(2m)(v^2/4 = 1/4mv^2, which is 1/2 the...

Homework Statement A sled of mass m is coasting on the icy surface of a frozen river. While it is passing under a bridge, a package of equal mass m is dropped straight down and lands on the sled (without causing any damage). The sled plus the added load then continue along the original line of...

Well I was going through class lecture notes and my professor wrote this When x = A(the maximum value), v=0: E=1/2kA^2 When v = wA, x=0: E=1/2mw^2A^2 where w = omega, A = amplitude, k = spring constant, m = mass, v = velocity and apparently both equations are equal, i would like to...

Homework Statement A cable lifts a 1200 kg elevator at a constant velocity for a distance of 35 m. What is the work done by (a) the tension in the cable and (b) the elevator's weight? Homework Equations W = fscos(theta) The Attempt at a Solution okay i already know the...

Homework Statement Ca3(PO4)2 + C + SiO2 --> CaSiO3 + CO + P4 Homework Equations The Attempt at a Solution I'm okay with balancing reactions that have 2 reactants but when there's 3 i take an extremely long time to do it. is there any easy way or strategy to go about balancing...

Homework Statement Two 5-N boxes are attached to opposite ends of a spring scale and suspended from pulleys as shown. In my drawing, the xxxxx represents the scale in the midde. ...|o\-------xxxxxx-------/o| ...|...\...../...| ...|...\______________/ ...|...

What do you mean by i forgot the 1000m part, and what was wrong with my initial calculations

Okay so, y = Vot + 1/2gt^2 0 = 1/2gt^2 + Vot - y 0 = 4.9t^2 + 14t - 10 Then I use quadratic formula and I end up with t = 0.688, so this is the time it takes for the vertical velocity to reach the height? So now I calculate horizontal velocity necessary to travel 1000m during the same...

Homework Statement A baseball is thrown just so that it is able to pass a wall 10m high at a distance that is 1000m away. If it is aimed 30 degrees above the horizontal, what is the initial speed of the baseball? Homework Equations relevant equations shown at the attempt at the solution...