# SC 130 Physical Science Quiz 08 • Name:

[d] [t] For the following system…

Bulbsi (amps) V (volts)
one 0.303.0
two 0.151.5
three0.101.0

[g]

The functions provided in the above chart are specified in more detail below. The format shown is the OpenOffice.org Calc format. If using Excel, substitute commas for the the semi-colons.

The first function finds the slope of a line with the y-intercept equal to 0

=LINEST(y-data;x-data;0)

The following two functions calculate the slope and intercept for any linear relationship.

=SLOPE(y-data;x-data)

=INTERCEPT(y-data;x-data)

Analyze the the data seen in the table and displayed on the chart. Only answer the questions for which the analysis is true.

 1. _____ Does the data form a straight line or roughly close to a straight line? yes no ↓ ↓ First analysis conclusion: There is a mathematical relationship. Second conclusion: The data is linear. 2. _____ Does the data form a smooth curve or roughly close to a curve? 2. _____ Is the y-intercept zero or close to zero? yes no yes no ↓ ↓ 3. __________ Third analysis conclusion: The intercept is 0. Use the table and chart to find the slope and write the slope in the blank with the appropriate units. 3. Third analysis conclusion: se the table and chart to find the slope __________ and intercept __________ with the appropriate units. First analysis conclusion: There is a mathematical relationship. Second conclusion: The mathematical relationship is non-linear. First and only analysis conclusion: There is probably not a mathematical relationship.

4. Sketch the magnetic force field lines for a magnet below.

5. ____________________ A Haier microwave oven consumes 1250 Watts at 120 volts. What is the current in amperes used by the microwave?

6. ____________________ A Haier microwave oven consumes 1250 Watts at 120 volts. What is the resistance of the microwave in Ohms (Ω)?

Formulas

Voltage V = current i × Resistance r

Power = current i × Voltage V