On a cold winter's morning you awake and step out of bed. One foot is on the tile floor and the other is on a rug on the floor. Which statement is true?
A. The tile feels colder because it is connected to the cold ground outside
B. The tile feels colder because it conducts heat more rapidly away from your foot
C. The tile feels colder because it cannot absorb water like the rug can
D. The tile feels colder because it is smoother than the rug
Answer: B
You might also like to view...
X-Ray Diffraction: A crystal is irradiated with x-rays with a wavelength of 0.120 nm. The atomic planes in the crystal are separated by 0.21 nm. At what angles of incidence with respect to the normal will the x-rays reflect from the crystal?
A. 73°, 55°, 31° B. only 55° C. only 73° and 31° D. only 73°
At what rate is the human body radiating energy when it is at 33°C? Take the body surface area to be 1.4 m2, and approximate the body as a black body
What will be an ideal response?
Assuming the frequency remains constant, a monochromatic light ray is transmitted through an glass-to-air boundary, what happens to the wavelength?
a. decreases b. approaches zero value c. increases d. remains unchanged
Enrico says that positive charge is created when you rub a glass rod with silk, and that negative charge is simply the absence of positive charge. Rosetta says that negative charge is created and that positive charge is the absence of positive charge. (She has heard that Ben Franklin should have reversed the signs he associated with the charges.) Which one, if either, is correct?
A. Enrico, because there really is only one kind of charge. B. Rosetta, because there really is only one kind of charge. C. Neither: although no charge is present originally, both types of charge are created through friction. D. Both: only one type of charge is created by friction at any one time. E. Neither: both negative and positive charge are present simultaneously in all solid materials on Earth and the process described involves a transfer of charge, not the creation of charge.