What is the current through the inner (lone) 1.0kΩ resistors in the RC circuit below at time 0.25ms after the switch is closed? The potential across the capacitors is initially 5.0V.

An oil-water mixture works as an insecticidal spray against mosquitoes and other insects because it _____.

A 200-loop coil of cross-sectional area 8.5 cm2 lies in the plane of the page. An external magnetic field of 0.060 T is directed out of the plane of the page. The external field decreases to 0.020 T in 12 milliseconds.   (a) What is the magnitude of the change in the external magnetic flux enclosed by the coil?   (b) What is the magnitude of the average voltage induced in the coil as the external flux is changing?      

An anthropologist discovers the fossilized heart of an extinct animal. The evidence indicates that the organism’s heart was large, was well-formed, and had four chambers, with no connection between the right and left sides. A reasonable conclusion supported by these observations is that the _____.

A thin, circular disk of radius 30.0 cm is oriented in the yz-plane with its center at the origin. The disk carries a total charge of +3.00 μC distributed uniformly over its surface. Below the xy-plane at z= -10.0cm (centered at (x,y,z) = (15.0, 0.0, -10.0)) lies a ring in a plane parallel xy with total charge –2.00µC and radius 15.0cm. Calculate the electric field at the point (15.0, 0.0, 0.0) and report your answer in component form.  (Enter your units in the last box.)

The average axial length of the eye is:

The echoes of an A-scan that are being measured are identified by the instrument by means of:

Echographic spikes from an A-Scan:

One of the reasons immersion A-scan is more accurate than the contact method is:

Two very large parallel sheets a distance d apart have their centers directly opposite each other. The sheets carry equal but opposite uniform surface charge densities. A point charge that is placed near the middle of the sheets a distance d/2 from each of them feels an electrical force F due to the sheets. If this charge is now moved closer to one of the sheets so that it is a distance d/4 from that sheet, what force will the charge feel?