The use of thermal mass on a direct gain passive solar system _______.
a. reduces temperature fluctuations during the day.
b. provides foundation support for the collector superstructure
c. increases the insolation on the south-facing windows
d. increases temperature fluctuations during the night
Question 2
When an acrobat hangs motionless from a pair of rings
a. she has no measurable weight.
b. her weight depends on the angles the ropes make with the ceiling.
c. her weight is reduced by the upward force the rings exert on her.
d. her weight is increased by the upward force the rings exert on her.
e. she exerts a gravitational force on the Earth that is equal to the sum of the forces the rings exert on her.