How long was this exposure?
a. a few seconds
b. a few minutes
c. a few hours
d. a few days
e. a few weeks
Answer: c. a few hours
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The heating element of a toaster is a 5.4-m length of nichrome wire of diameter 0.48 mm. The resistivity of nichrome at the operating temperature of the toaster is 1.3 × 10-6 ? ? m. The toaster is designed to operate at a voltage of 120 V
How much power does it draw in normal operation? A) 370 W B) 360 W C) 380 W D) 400 W E) 410 W
When three vectors are added graphically and form a closed triangle, the largest enclosed angle between any two of the vectors cannot be greater than
a. 60°. b. 90°. c. 180°. d. No maximum exists.
Granitic pebbles with a radiometric age of 300 million years are embedded in a sedimentary rock. A dike, dated at 200 million years, intrudes into the sedimentary rock
With all this information we can estimate the age of the sedimentary rock to be A) older than 300 million years. B) younger than 200 million years. C) between 200 and 300 million years old. D) precisely 300 million years old.
When solutions of AgNO3 and CaCl2 are mixed, which type of reaction is likely?
a. Combination b. Double-replacement c. Decomposition d. Single-replacement