Recent content by bnwchbammer

Homework Statement a) What can you say about a solution of the equation y' = -y^2 just by looking at the differential equation? b) Verify that all members of the family y = 1/(x + C) are solutions of the equation in part (a) c) Can you think of a solution of the differential equation y' =...

Homework Statement A 10-cd point source lamp and a 70-cd point source lamp cast equal intensities on a wall. If the 10-cd lamp is 8.0 m from the wall, how far from the wall is the 70-cd lamp? Homework Equations I'm not sure what the equation for a candela is. The Attempt at a...

Should'a been able to figure that out, but got it now. 100% on webassign, all right. Thanks for helpin me out guys.

well, to convert cm^2 to m^2 do I have to do anything special besides just dividing by 100?

Webassign night again! Homework Statement During normal conversation, the amplitude of a pressure wave is 0.023 Pa. (a) If the area of the eardrum is 0.56 cm2, what is the force on the eardrum? N (b) The mechanical advantage of the three bones in the middle ear is 1.5. If the force in...

Homework Statement A hiker shouts toward a vertical cliff 735 m away. The echo is heard 4.00 s later. (a) What is the speed of sound of the hiker's voice in air? [] m/s (b) The wavelength of the sound is 0.732 m. What is its frequency? [] Hz (c) What is the period of the wave? [] ms...

Homework Statement The two pith balls below each have a mass of 4.9 g and equal charge. One pith ball is suspended by an insulating thread. The other is brought to x = 3.5 cm from the suspended ball. The suspended ball is now hanging with the thread forming an angle of 30.0° with the vertical...