Density: How many grams of ethanol (density 0.80 g/cm3) should be added to 5.0 g of chloroform (density 1.5 g/cm3) if the resulting mixture is to have a density of 1.2 g/cm3? Assume that the fluids do not change their volumes when they are mixed.
A. 2.0 g
B. 2.4 g
C. 1.8 g
D. 4.4 g
E. 1.6 g
Answer: A
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A small metal sphere is suspended from the conducting cover of a conducting metal ice bucket by a non-conducting thread. The sphere is given a negative charge before the cover is placed on the bucket. The bucket is tilted by means of a non-conducting material so that the charged sphere touches the inside of the bucket. Which statement is correct?
A. The negative charge remains on the metal sphere. B. The negative charge spreads over the outside surface of the bucket and cover. C. The negative charge spreads over the inside surface of the bucket and cover. D. The negative charge spreads equally over the inside and outside surfaces of the bucket and cover. E. The negative charge spreads equally over the sphere and the inside and outside surfaces of the bucket and cover.
The physician orders gentamicin 40 mg IVPB q8 hr for infection. The medication is supplied in gentamicin 40 mg/100mL to infuse over 1 hour. Tubing drop factor is 20 gtt/mL. How many drops per minute will be given?
How small is the Planck length, the smallest unit of the fabric of space itself.
A.) 10^-20 m. B.) 10^-35 m. C.) 10^-25 m. D.) 10^-18 m. E.) 10^-50 m.
Radioactivity in the world is something
A) relatively new. B) as old as the world itself. C) to become frantic about.