What is a necessary condition for total internal reflection in a medium?
a. when the angle of incidence is equal to the critical angle
b. when the angle of incidence is greater than the critical angle
c. when the angle of refraction is equal to the critical angle
d. when the angle of reflection is less than the critical angle

Give your knowledge of these things in your paper, you will compare and contrast analog and digital signals to determine which is more reliable for encoding and transmitting information. you’ll compare these features: signal shape numerical values for signal measurements amount of data that can be transmitted energy requirements privacy and security (ability of the signal to be encoded in a secret code) clarity of signal in the space provided, write down what you already know about any of these features. if you’re not sure, write down questions you might have about the features.

Under normal conditions, describe how increasing the temperatures effects the solubility of a typical salt

Two point charges are separated by a certain distance. how does the strength of the electric field produced by the first charge, at the position of the second charge, change if the second charge is doubled? a. the field does not change b. the field strength decreases by half. c. the field strength doubles d. the field strength quadruples