A small, hot object makes thermal contact with a more massive, equally hot object. Consequently,
1.there will be a net flow of energy from the smaller object to the larger object.
2.there will be a net flow of energy from the larger object to the smaller object.
3.there will be zero net flow of energy.
4.more information is required to determine the direction of the net flow of energy.
3
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Radioactivity Basics: A radioactive isotope of atomic number Z emits a beta-minus particle, and then the daughter nucleus emits a gamma ray. What is the atomic number of the resulting nucleus after both processes?
A. Z - 1 B. Z + 1 C. Z - 2 D. Z - 3
Bulk Modulus: Which one of the following would be expected to have the smallest bulk modulus?
A. liquid mercury B. liquid water C. helium vapor D. solid iron E. solid uranium
A motor drives a shaft with diameter d 5 46 mm at f 5 5.25 Hz and delivers P 5 25 kW of power. The maximum shear stress in the shaft is approximately:
(A) 32 MPa
(B) 40 MPa
(C) 83 MPa
(D) 91 MPa
An object’s x-position is shown in the boxed graph of the following set of graphs. Which of the other graphs in the set most correctly describes its x-velocity?
A. A
B. B
C. C
D. D
E. E