A block of clear acrylic sits on top of a block of glass. A ray of light traveling in the glass is incident on the acrylic/glass interface at an angle of [t1] degrees with respect to the normal. The light has wavelength [wa] nm in the acrylic and [wg] nm in the glass.  What is the refracted angle into the acrylic as measured from the normal to the interface? Give your answer in degrees and round to one decimal place. Show all work starting from Snell’s law to receive full credit.

Which of the following terms best describes species from an element that have the same number of protons and electrons but different numbers of neutrons?

Everyman is a ____.

The figure shows the position of an object as a function of time.  During the time interval from time t= 0 s  and time t= 9 s (a) what is the length of the path the object followed? (b) what is the displacement of the object? distance and displacement.jpg

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An electrochemical cell is constructed based on the oxidation of cadmium (Cd) metal and the reduction of lead (Pb2+) ions.  Solutions of 1.00 M cadmium nitrate and lead nitrate were used to construct the electrochemical cell.  If the measured voltage in the cell is positive where is the cadmium ion located?

What is the cell potential for an electrochemical cell at 298 K with a copper metal anode immersed in a O.30 M copper sulfate and a copper metal cathode immersed in 1.6 M copper sulfate?

15. When an experiment is conducted, one and only one of three mutually exclusive events S1, S2, and S3 can occur, with P(S1) = 0.4, P(S2) = 0.3, and P(S3) = 0.1. The probabilities that a fourth event A occurs, given that event S1, S2, or S3 has occurred, are P(A|S1) = 0.2     P(A|S2) = 0.4     P(A|S3) = 0.1 If event A is observed, find P(S1|A). (Round your answer to four decimal places.)

The coefficient of volume expansion of water is positive between 00 C to 40C.

Consider the two mirrors below angled at angle