Please choose 3 questions below to answer. Each answer requires a minimum of
two sentences. Utilize Discovery Ed "Engage Tab" to help you with answering
the questions.
Please identify which question numbers you are answering.
1. What is the relationship between electrical power, current, and voltage?
2. What is the relationship between current, voltage, and resistance?
3. How do current, potential difference, resistance, and power relate to one
another?
4. Why do resistors in DC circuits increase in temperature?
5. What are the common elements that make up series and parallel circuits,
and how are circuits diagrammed?
6. How can you determine the relationship between power and resistance in
a circuit?
7. How can the voltage or current in a simple DC circuit be described and
predicted?
8. What are series and parallel circuits, and how can you design and build
them?

Use the empirical rule. the mean speed of a sample of vehicles along a stretch of highway is 70 miles per hour, with a standard deviation of 4 miles per hour. estimate the percent of vehicles whose speeds are between 66 miles per hour and 74 miles per hour. (assume the data set has a bell-shaped distribution.)

The frequency of vibrations of a vibrating violin string is given by f = 1 2l t ρ where l is the length of the string, t is its tension, and ρ is its linear density.† (a) find the rate of change of the frequency with respect to the following. (i) the length (when t and ρ are constant) (ii) the tension (when l and ρ are constant) (iii) the linear density (when l and t are constant) (b) the pitch of a note (how high or low the note sounds) is determined by the frequency f. (the higher the frequency, the higher the pitch.) use the signs of the derivatives in part (a) to determine what happens to the pitch of a note for the following. (i) when the effective length of a string is decreased by placing a finger on the string so a shorter portion of the string vibrates df dl 0 and l is ⇒ f is ⇒ (ii) when the tension is increased by turning a tuning peg df dt 0 and t is ⇒ f is ⇒ (iii) when the linear density is increased by switching to another string df dρ 0 and ρ is ⇒ f is ⇒

Which articulations allow for greatest range of motion?