Recent content by Huskies213

Homework Statement The bottom edge of the opposite side of an in-ground pool (n=1.33) is just visible at an angle of 18 degrees above the horizon. If the pool is 2m wide what is the depth? I think I'm stuck on trying to relate the refraction formulas as to determining depth. .. any tips...

Homework Statement A helium neon laser (642nm) illuminates a single slit and is observed on a screen 2.5m behind the slit. The distance between the first and second minima in the pattern is 4.75mm. What is the width of the slit in mm?? Any help here would be greatly appreciated...

RE mirrors no the mirror doesn't change shape when you move distances from it. the image does... *more hints ...im still lost...

:confused: Can anyone explain what i am doing wrong? I thought the radius of curvature is 2 x the distance from mirror.. A mirror produces an image magnified by 1.5 when your face is 29 cm from the mirror. What is the radius of curvature? I thought it would be .29m x 2 = .58m... but that...

Figuring sum of double bonds and rings ?? Does anyone know how if there is a way to figure out the sum of double bonds and rings of a compound C6H9BrO ?? Lost.. thank you.

First is this correct? The pH of a 150 mL aqueous solution of 2.13 x10^-3 M HCl is pH = -Log (2.13 x10^-3) pH = 2.672 and how would you solve this one? A .1M aqueous solution of an acid HA has a pH of 4.0 what is the...

Re Threshold = 10^-12 ...thanks for the help!

Does anyone know how to solve this ? A group of people were exposed to 114 dB music for 60 minutes. Eleven of the 20 subjects showed a 17 dB reduction in hearing sensitivity at 4000 Hz. What is the intensity corresponding to the threshold of hearing for these people ? ( in W/m^2) thanks

Re Can anyone help ? I am lost

Can anyone help me with how you would solve these? i am lost... 1.) Soudn 1 has an intensity of 380 W/m^2. Sound 2 has an intensity level of 2.5 dB greater than the intensity level of soudn 1. What is the intensity level of sound 2? 2.) A siren produces a soudn of 120 dB at 2m. Find the...

Re Can anyone explain more ? I am still lost

Can anyone help me with where to begin ? ? ? Turning a doorknob through 1/6 of a revolution requires 0.1 J of work. What is the torque required to turn the doorknob? i know that T = F x r what is the force and radius ?(is radius 3/6=1/2??)

Re I don't know where to start .. can anyone Help ?

Can anyone help me with these 2 ? 1.) A cd with a diameter of 12 cm, speeds up from 0 to 4 rev/s in 3s. What is the tangential acceleration of a point on the outer rim of the disk at the moment when angular speed is a.) 2 rev/s b.) 3 rev/s 2.) A fisherman reels in a fish and turns the...

Can anyone help me with this i have no idea how to solve it. You have two identical springs, each with a relaxed length of 50 cm and a spring constant of 450 N/m, they are connected by a short cord of length 10 cm. The upper spring is attached to the ceiling. A box that weighs 98 N hangs from...