# Search results for query: *

1. ### Parallel and Series Circuit

the best way i found to working out the solution was first assuming that the 100 is in a parallel circuit.then it was a matter of calculating as i went to see if i was getting higher or lower than 62.5, thus determining what had to be arranged to get higher or lower. honestly tho, this...
2. ### Getting two Answers : calculating velocity of ball

Fantastic. The different velocities is giving me a way to calculate the actual energy loss from the impact. That's awesome. This turned out better than i thought. Many thanks for the help.
3. ### Getting two Answers : calculating velocity of ball

From what you are saying, I am taking it that the impact of the ball on the box would release some energy before it even begins to slide? Could this be calculated? I assume not without further information. However, now this leads me to even more confusion. Are you suggesting that method 2 is...
4. ### Getting two Answers : calculating velocity of ball

i think the assumption i am making is that KE + Wnc = 0
5. ### Getting two Answers : calculating velocity of ball

Homework Statement Mr. Gale decides to build his own velocity measuring machine. His plan is to build a box (mass 2.50 kg) that catches the ball (mass 0.500 kg) being thrown. It then slides across the desk but eventually comes to a stop due to friction (μ = 0.800) between the box and the...
6. ### Describe the motion of the rock particle at point B during t

EXACTLY just be sure you can tell which way the point DOES move.
7. ### Describe the motion of the rock particle at point B during t

thankfully you don't need a rope - use youtube! take a look. put your finger on a point along that rope. does it move forward? the wave clearly does. But what about a point on the rope? in other words, which way does the medium move?
8. ### Describe the motion of the rock particle at point B during t

Careful - I think I can see where your problem is. Consider I have a jump rope. I'll mark a spot along it. In fact if you have a rope nearby you should do this! Now lay the rope on the floor and have it stretched out. take one end and give it a quick a up and down jerk (you are making the...
9. ### Describe the motion of the rock particle at point B during t

Notice that the wave itself is moving in the forward direction. At a later moment, that entire wave will move forward (to the right). What will happen to point B then?
10. ### Monochromatic Light and a 30-60-90 Prism Problem

ok what you need to do first is work out your angles. and you are not doing it correctly right now. refer to this image: http://upload.wikimedia.org/wikipedia/commons/thumb/3/3f/Snells_law2.svg/334px-Snells_law2.svg.png and make sure you are using the correct angles - make note that the...
11. ### 2D Momentum and Collisions Lab Help Grade 12

i think you should show your work so far. there is no reason anything should cancel out.
12. ### Monochromatic Light and a 30-60-90 Prism Problem

please show the work you've completed so far.
13. ### 2D Momentum and Collisions Lab Help Grade 12

what else could you call m3?
14. ### Quick cross product question

this is a general question - the thing I'm working on if what i am asking makes sense - i am currently only looking for a confirmation on what i think is right this is a vector product question: if i have: (A/c x cB) can i look at that as: (1/c*c)(A x B) which comes to A x B the...
15. ### Im trying to work out the acceleration and ave velocity for a model helicopter

apart from a small discrepancy [a few meters] in your distance calc, it all look good to me.
16. ### Kinetic energy, help ?

i'm getting the same answer as you
17. ### Solving for Time When a Ball is Dropped 85 Feet

now I'm not sure what grade you are but here it is in a nutshell: your equation: Vo + at is a measurement of the speed at any time so you would describe that as dD/dt [where i am labeling D as the distance traveled] assuming this you can integrate by: dD/dt = Vo + at ∫dD = ∫Vo +...
18. ### Determine the time required for a missile to reach its maximum altitude of 21 km

i'm confused by this question. there is a missle but you are given no information as its speed (initial or final), or it's acceleration? something is missing here. if the only thing you know is the distance (21000m) then the best you can accomplish is an equation made up of the unknown...