Calculating the speed of light in a substance given the index of refraction.

The index of refraction of carbon tetrachloride is 1.46. The speed of light in this material is: A) less than 1.00 x 10^6 km/s B) between 1.00 x 10^6 and 2.00 x 10^6 km/s C) between 2.00 x 10^6 and 3.00 x 10^6 km/s D) greater than 3.00 x 10^6 km/s

Balancing a radioactive decay equation.

In the equation 226/88 Ra--> 4/2 He+ ------, the characteristics of the missing particle are: A) charge, 90; nucleons, 230 B) charge, 86; nucleons, 230 C) charge, 90; nucleons, 222 D) charge, 86; nucleons, 222

Concave mirror

For an image formed by a concave mirror to be a point, the object must be: A) between the principle focus and the mirror B) at the center of curvature C) at an infinite distance D) at the principle focus

Batteries and Circuits

PART ONE: A battery that supplies an emf of 6.0 V has an internal resistance of 0.20 ohm. It is connected to a load resistor of 8.8 ohms. The total Current in the entire circuit is: A) less than 0.25 A B) between 0.25 A and 0.50 A C) between 0.50 A and 1.0 A D) greater than 1.0 A PART TWO: A battery of four 1.5 V dry cells in series, the voltage across the four cells is: A) 0 V B) 1.5 V C) 3.0 V D) Over 3.0 V

Resistors

PART ONE: If an electric circut contains only an ordinary resistor, all the work done by the electric current appears as: A) light B) rotary motion C) chemical action D) heat PART TWO: Two 10.0 ohm resistors are connected in parallel, and this combination is connected in series with a third 10.0 ohm resistor. The resistance of this network is; A) 10.0 ohms B) 5.0 ohms C) 15.0 ohms D) 20.0 ohms