A machinist needs to remove a tight fitting pin of material A from a hole in a block made of material B. The machinist heats both the pin and the block to the same high temperature and removes the pin easily
What statement relates the coefficient of thermal expansion of material A to that of material B?
A) Material B has a greater coefficient of expansion than does material A.
B) The situation is not possible because heating block B will shrink the hole in the material as the material expands with increasing temperature.
C) Material B has the same coefficient of expansion as does material A.
D) Material A has a greater coefficient of expansion than does material B.
Answer: A
You might also like to view...
Imagine a magnetic field pointing into the plane of this page. An electron moves across the paper from left to right. The direction of the magnetic force on the electron will be
A. out of the plane of the paper. B. in the plane of the paper and toward the bottom of the page. C. into the plane of the paper. D. in the plane of the paper and toward the top of the page. E. in the plane of the paper and opposite the electron's velocity.
Two children seat themselves on a seesaw. The one on the left has a weight of 400 N while the one on the right weighs 300 N. The fulcrum is at the midpoint of the seesaw. If the child on the right is not at the end but is 1.50 m from the fulcrum and the seesaw is balanced, what is the torque provided by the weight of the child on the left? (Take ccw as positive.)
a. 600 N•m c. –600 N•m b. 450 N•m d. –450 N•m
A person in a boat sees a fish in the water (n = 1.33), the light rays making an angle of 40° relative to the water's surface. What is the true angle (in degrees) relative to the water's surface of the same rays when beneath the surface?
a. 40 b. 35 c. 50 d. 55 e. 61
In an electromagnetic wave, the electric and magnetic fields are oriented such that they are
A) parallel to one another and perpendicular to the direction of wave propagation. B) parallel to one another and parallel to the direction of wave propagation. C) perpendicular to one another and perpendicular to the direction of wave propagation. D) perpendicular to one another and parallel to the direction of wave propagation.