Recent content by rmcgovern

ah, thank you for your help

Homework Statement A person swimming 0.95 m below the surface of the water in a swimming pool looks at the diving board that is directly overhead and sees the image of the board that is formed by refraction at the surface of the water. This image is a height of 6.00 m above the swimmer. What...

Thanks for your help! A correctly drawn diagram led me right to the solution.

Homework Statement The image of a tree just covers the length of a plane mirror 3.80 cm tall when the mirror is held 40.0 cm from the eye. The tree is 20.0 m from the mirror. What is the height of the tree? Homework Equations m=y'/y, s=s'=20m (from problem statement) The Attempt...

Nevermind, figured it out using flux.

Homework Statement As a new electrical technician, you are designing a large solenoid to produce a uniform 0.170 T magnetic field near the center of the solenoid. You have enough wire for 4200 circular turns. This solenoid must have a length of 1.10 m and a diameter of 1.50 cm. What current...

ah! I forgot that K=1/4∏ε0. a rather trivial error. thank you for your help.

Homework Statement A metal sphere with radius ra = 1.20 cm is supported on an insulating stand at the center of a hollow, metal, spherical shell with radius rb = 9.00 cm. Charge +q is put on the inner sphere and charge -q on the outer spherical shell. The magnitude of q is chosen to make the...