Recent content by Astar

yer. thanks :D

the force on an object due to a gravitational field... Weight = mass of the object x acceleration due to gravity... But I still don't know why the answer is no... Obviously the object still has mass so therefore the acceleration due to gravity must be zero...but I don't understand why it...

Homework Statement Does a falling object posses weight? Homework Equations F=mg The Attempt at a Solution I thought yes because it still has a mass and is accelerating due to gravity. However, the answer is No. If anyone could shed some light on this I would greatly appreciate it.

Ahh thanks heaps. Great explanation! :D Finally I understand this concept!

So Impulse = Force x Time By impulse conservation I mean, the product of the force applied and the time over which it is applied remains the same before and after the collision. And yet that would mean that the change in momentum of the objects would be the same. :confused: I don't know if...

Conservation of Impulse? Homework Statement I know that momentum is conserved, but is impulse? Homework Equations Impulse = change in momentum The Attempt at a Solution I really have no idea. I would say it isn't conserved because it equals the changein momentum. But the two...

Homework Statement Complete the sentence: If you are presented with a graph of speed vs time the slope of the graph at any point will represent the ... ... of an object. Homework Equations n/a The Attempt at a Solution I think the answer would be acceleration or possibly average...

Homework Statement Two light globes are connected in parallel in a 240V circuit. One light globe has a current of 0.25A flowing through it. The other has 0.41A glowing through it. Which light globe is consuming the most energy and why? Homework Equations The Attempt at a Solution...

Homework Statement Define refractive index in terms of changes in the velocity of a wave in passing from one medium to another. Homework Equations The Attempt at a Solution Would I be right in saying that in terms of the question above, refractive index is the constant found between the...

ahh okay. thanks :D

Homework Statement Been racking my brains over this one and I'm stuck maybe someone here can help me. I'm doing physics through distance education at high school and its very difficult. "In house fires the wiring is often cited as the cause of the fire. Often this wiring is partially...

OH ofcourse, as space is a vacuum. So the waves will just continue going until they reach a medium. Okay thanks for that.

Homework Statement So, higher frequency waves have greater energy than lower frequency waves. I know that around Earth the lower frequency waves penetrate best due to the higher frequency ones being absorbed by the atmosphere. However, in space do the higher frequency waves with more...

k thanks for that

Homework Statement My question is very basic, yet one which has become increasingly frustrating. I am doing an investigation into determing the refractive index of Perspex for an assignment. To do this I am using a light ray box to shine a ray onto a rectangular perspex prism, and then using...