Two current loops are coaxial and coplanar. One has radius a and the other has radius 2a. Current 2I in the outer loop is parallel to current I in the inner loop. The magnitude of the magnetic field at the center of the two loops is
A.
B.
.C.
.D.
.E.
.Answer: D
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An 83 lbm cast iron bracket is hung from a wire and a spring weigh scale as shown. What would be the reading of the scale and what is the apparent density of the bracket. Assume the density of the iron is 535 lbm/ft^3 and the density of water is 62.4 lbm/ft^3.
An RBE
A) is an effective dose of 1 Gy. B) is equivalent to 3.70 × 1010 decays/s in radium. C) is 10-2 J/kg. D) when multiplied into dosage, yields the effective dose. E) is an SI unit of absorbed dose = 1 J/kg = 100 rad.
A girl is standing in front of a concave mirror. Consider two rays of light, one from her nose and one from her mouth that are parallel as they are traveling toward the mirror. These rays will come together
a. at the focal point. b. at the center of curvature. c. at the image point. d. behind the mirror if she is too close to the mirror.
Short-term and long-term effects of radiation on the health of the recipient are called ______________ effects
a. threshold b. somatic c. latent d. genetic