Recent content by aeromat

Question: A 460kg satellite is launched into a circular orbit and attains an orbital altitude of 850km above Earth's surface. Calculate the: e) additional energy and speed required for the satellite to escape. Attempt: I found Ek to be 1.27*10^10 J Thus, the total energy is...

What am I finding to be confusing.. The graphs of Millikan's data were straight lines with equal slopes. The graph was plotted maimum kinetic energy (eV) versus the frequency of the wave. This was the graph that produced the linear relationship from the photoelectric effect. What does it mean...

a increases, but will become negative.. a is proportional to μ ...

That will give me the following: a = [\frac{(mass2)(g) - μ(mass1)(g)}{(mass1 + mass2)}] But then I have a, which I have nothing to sub in for.

Homework Statement A Fletcher's trolley apparatus is set up with a block of wood of mass 4.0kg and a suspended mass of 2.0kg. The Attempt at a Solution a) Calculate the acceleration of the sys. and the tension in the string when the mass is released. m1 FnetX = [T - Ff = m1(a)] FnetY...

Homework Statement If you are on the merry-go-round going in a circle at constant speed, are you looking at the world in an inertial, or non-inertial frame of reference? How do we tell whether from one's viewpoint, they are looking at something from an interial or non-inertial frame of reference?

1,2,3. Homework Statement , and work done. After Lee gives his little sister Kara a big push on a swing, her horizontal position as a function of time is given by the equation x(t) = 3cost(t)*e^{-0.05t} , where x(t) is her horizontal displacement, in metres, from the lowest point of her swing...

Homework Statement The Sun radiates away energy at the rate of 3.9*10^24 Watts. At what rate it it losing mass due to this radiation? Homework Equations E = Δmc^2 E = mc^2 - m0c^2 Where m0 rep. rest mass. The Attempt at a Solution For this one, I am unsure as to how I would go...

Honestly, I have to say I overlooked that "-" sign. Thank you Pengwuino.

Problem statement How fast must a neutron be traveling relative to a detector in order to have a measured kinetic energy that is equal to its rest energy? An "attempt" I know Ek = mc^2 - m0c^2 But if Ek = m0c^2, wouldn't the two terms cancel out from this equation? I am having trouble...

Uh.. That was the first time I ever heard any of those methods, so could anyone give me a few pointers just to show how I start off with one of the methods above?

Homework Statement Find the zeros of the cubic equation: y = x^3 -9x^2 + 15x + 30 How do we find the zeros of this? In this case, subbing in x-values that will make it equal 0 does not work.

Homework Statement Here they are deriving the equation for Young's experiment: http://www.physicsclassroom.com/Class/light/U12L3c.cfm The part where they start bringing up "Assertion" and "Logic/Rationale" is where I got confused: They mention for part ii) that if the distance L >>> y, then...

Homework Statement Sketch the curve defined by g(x) = x^{1/3}*(x+3)^{2/3}Homework Equations First Derivative Second DerivativeThe Attempt at a Solution I attempted to use the algorithm for curve sketching: 1) Find the intercepts 2) First Derivative; look for extrema and points where f'(x) DNE...

Homework Statement A charge q1 = +4.0nC experiences a force of 3*10^-5N to the east when placed in an electric field. If the charged is replaced by another, q2 = -12nC, what will be the magnitude and direction of the force on the charge at that position? Homework Equations Coulomb's Law...