You insulate your medium-sized attic with insulation with R=10. Which of the following sets of estimates is most reasonable?
A. The attic is 150 sq ft, the temperature difference on average is 5 degrees C, and electricity costs 1 cent per kWh.
B. The attic is 15,000 sq ft, the temperature difference on average is 10 degrees F, and electricity costs $10 per kWh.
C. The attic is 150 sq ft, the temperature difference on average is 5 degrees F, and electricity costs $1 per kWh.
D. The attic is 1500 sq ft, the temperature difference on average is 50 degrees F, and electricity costs 1 cent per kWh.
E. The attic is 1500 sq ft, the temperature difference on average is 10 degrees F, and electricity costs 10 cents per kWh.

the motion of a pendulum is a classic example of mechanical energy conservation. a pendulum consists of a mass (known as a bob ) attached by a string to a pivot point. as the pendulum moves it sweeps out a circular arc, moving back and forth in a periodic fashion.

  distance on the y-axis and time on the x-axis.

explanation:

the instantaneous velocity = change in position/time taken

the slope of the graph should give instantaneous velocity.

  slope of a graph = change in value of y -axis / change in values of x -axis

  comparing both the equations

    change in value of y -axis = change in position

  change in values of x -axis = time taken

so position values should be on the y axis and time values should be on the x axis.

distance on the y-axis and time on the x-axis.