Dave

If l'm looking eastward toward a rainbow, with a low sun at my back, and the rainbow's arc appears to be perpendicular to line from the sun to me to the rainbow: What is the shape of the rainbow's arc? Parabola? Circle? ... Thanks.

What would be a reasonable (+/- 10%) approximation for the coefficient of friction due to air resistance for a smooth spherical object falling through the air? An object like a bowling ball, croquet ball (sanded smooth). And, is the coefficient applied to the velocity? velocity-squared? Thanks for your help.

Running Windows XP Pro, Dell laptop with external Dell 20" monitor. Every once in a while when I'm moving the cursor around, all of the open windows suddenly get changed to small windows and displayed on the screen in tile arrangement. I have to click and move around to get the display back to normal. Is there some setting that I need to modify?

What would be the difference in kinetic energy of bullet leaving barrel vice bullet coming back down to point of orign, including affects of air resistance? 185 gr bullet, fired straight up, 6ft. above ground, muzzle velocity of 1150 ft/sec, dry air at sea level.

Because I work such long hours, my dog has had a few accidents on the linoleum floor: peeing and pooping. Now that I've cleaned up the mess. How do I get rid of the lingering odors?

I have Windows XP Pro on my laptop. I have iTunes for playing music. Which media format produces higher fidelity, higher quality: .wma vs. .mp3?

I must ride my motor scooter at night and I'm worried I'm not visible enough to automobiles. I want to add some LED lamps on back, side, and front. What color LED lamp will be most visible to people at night?

I am installing new kitchen cabinets in my kitchen. Along one wall I want to install a 24-inch by 8-foot tall pantry. But the ceiling height is 8-feet. How do I manuver the cabinet into an upright position for installation?