A rectangular loop of copper wire of resistance r has width a and length

b. the loop is stationary in a uniform magnetic field. the magnetic field b at time t = 0 seconds is directed into the page as shown below. the uniform magnetic field varies with time t according to the relationship b = b0 cos ω t, where ω and b0 are positive constants and b is positive when the field is directed into the page. the direction of the induced current in the loop when ω t = π 2 , after the magnetic field begins to oscillate is

Experiment scenario 2: a biology student wants to conduct a study of how the amount of food affects the weight gain for mice. i have set up four cages with a mouse in each cage. fill in the boxes that would allow the biology student to complete the study correctly

The a metal retainer that keeps the rolling elements evenly spaced. n a. seal n b. separator n c. bearing n d outer race

Unpolarized light falls on two polarizer sheets whose transmission axes are at right angles. a third polarizer is placed between the first two so that its axis makes a 52-degree angle with the axis of the first polarizer. a) what fraction of the incident light intensity is transmitted through the first polaroid? b) what fraction of the incident light intensity is transmitted through the second polaroid? c) what is the angle of polarization of the light that enters the third polaroid? d) what fraction of the incident light intensity is transmitted through the third polaroid. e) what happens if the middle polaroid is removed?