When charging a capacitor with a battery, how would the internal resistance of the battery affect the charging of the capacitor?
What will be an ideal response?
Given enough charging time, the final potential on the capacitor will still equal the emf of the battery. However, the charging rate will be influenced: the battery resistance adds to the circuit resistance in the time constant.
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How do humans use their eyes to measure relative distance by parallax?
a. By continuously focusing our eyes on distant objects we can determine distance. b. Since our eyes are separated the brain interprets the relative look angles of these eyes in terms of distance to the object viewed. c. Our eyes can measure the time it takes light to travel from an object and from this we get distance. d. By moving our heads from side to side our brain compares look angles from each of these positions to obtain the distance to the object viewed.
Granulation is caused by
a. sunspots. b. rising and sinking gases below the photosphere. c. shock waves in the corona. d. the solar wind flowing away from the corona. e. heating in the chromosphere.
Which of the following gases is monatomic?
a. Nitrogen b. Argon c. Hydrogen d. Chlorine
Star A has a radius of 200 000 km and a surface temperature of 6 000 K. Star B has a radius of 400 000 km and a surface temperature of 3 000 K. The emissivity of both stars is the same. What is the ratio of the rate of energy radiated by Star A to that of Star B?