The tensile strength of 99.8 % dense sintered alumina is 205 MPa, in comparison to a tensile strength of 125 MPa for 85 % dense sintered alumina. The value of the KIc for the alumina is 4 MPa?m1/2. Compare the defect lengths in these two alumina materials, assuming that the fracture is caused by existing internal cracks.
What will be an ideal response?
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What is the electric potential at the center of a hollow metal sphere of outside diameter 14. cm which holds a net charge of 3.3 ?C?
What will be an ideal response?
The speed of FM waves will be observed to be c = 2.9979 × 10^8 m/s when the antenna emitting the waves is
a. at rest relative to the receiving antenna. b. moving to the right of the detecting antenna at 0.5 c. c. moving to the left of the detecting antenna at 0.5 c. d. moving as described in (a), (b) or (c) above. e. moving at 2.9979 × 10^8 m/s.
Carbon dioxide dominates the atmospheres of Venus and Mars, but on Earth most of it lies underground as ________
Fill in the blank(s) with correct word
How is the energy stored in a current-carrying inductor related to the current value, I?
a. directly proportional to I1/2 c. inversely proportional to I b. directly proportional to I2 d. directly proportional to I