Recent content by Mphisto

Yeah, I meant that

Oh I got it! I managed to solve it =) thanks!

Homework Statement Solve the equation 7^2x+3 / 7^x^2 = 1 Homework Equations The Attempt at a Solution How can i "breakdown" 7^x^2? Thank you!

Yeah, i figured out how to do it :smile: Thanks guys!

Oooo, regardless how far dots are apart from each other, the time taken would still be 0.02s from a dot to the other? am i right? EDIT: do we use a ruler to measure? on the ticker tape

Wouldn't the speed and distance be different for dots that are further away from each other? that would be 2 unknown variables which I don't know how to solve... P.S. it is in an increasing acceleration

1 dot correspond to 0.02 sec, but how do I calculate for those that are further apart from the constant ones ( constant distance between the dots)

Homework Statement Question: How to calculate time for ticker tape to move from a point to another point? "The ticker-tape timer consists of a steel strip which vibrates 50 times a second and makes 50 dots a second on a paper being pull through it." Homework Equations The Attempt...

Thanks for taking the time to check! Edit: It should has been x^2 - 2(5x/6) = 1/3 x^2 - 2(5x/6) + (5/6)^2 = 1/3 + (5/6)^2

Homework Statement Question: 3x^2 - 5x - 1 = 0 (Solve using completing the square method) Homework Equations The Attempt at a Solution 3x^2 - 5x - 1 = 0 x^2 - (5/3)x - 1/3 = 0 x^2 - (5x/3) = 1/3 x^2 - 2(5x/3) = 1/3 x^2 - 2(5x/3) + (5/6)^2 = 1/3 + (5/6)^2 (x - 5/6)^2 = 1/3 +...

Oh ok, I got it :biggrin: Thank you!

So basically the normal of first surface is like a tangent line to the semi-circle? am I right to say that?

I am not sure... since it's curved i don't know how the normal would be placed there

"angle with the normal is zero"? shouldn't the light ray be refracted at the first surface? (air to glass)

http://t2.gstatic.com/images?q=tbn:ANd9GcRhvx6-lH4b3Dpe1otCjmmVHn_bcsWOpLUnEf-_A3IhQQON_YG0 Taken from google, as you can see the incident ray passes straight through the glass block