How does an object’s rate of cooling vary with size?
a. A larger object cools more slowly than a smaller object.
b. A smaller object cools more slowly than a larger object.
c. Size has no effect on an object’s rate of cooling.
Ans: a. A larger object cools more slowly than a smaller object.
You might also like to view...
Terminal Voltage and Internal Resistance: A battery has an emf ? = 12 V and an internal resistance r = 2.0 ?, as shown in the figure. When a current of 6.0 A is drawn from the battery, the terminal voltage of the battery Vab is closest to
A. 0 V. B. +12 V. C. +24 V. D. 2.0 V. E. 10 V.
Find the period of a wave of 100-m wavelength in deep water where 
.
A. 5.0 s B. 8.0 s C. 12.5 s D. 15 s E. 0.125 s
A +4.0-?C charge is placed on the x axis at x = +3.0 m, and a ?2.0-?C charge is located on the y axis at y = ?1.0 m. Point A is on the y axis at y = +4.0 m. Determine the electric potential at point A (relative to zero at the origin).
A. 6.0 kV B. 8.4 kV C. 9.6 kV D. 4.8 kV E. 3.6 kV
An instrument is rated at 250 W if it is connected across a 120-V dc power supply
(a) What current does it draw under normal operation? (b) What is its resistance? (c) How many kilowatt-hours does it use in a day if it is left on all the time?