The D-ring or support point on a safety harness should be placed _____
a. between the shoulder blades
b. at the back of the neck
c. around the waist
d. over the rib cage
a
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La abreviatura de un codo de entrada (acodamiento) es:
a. SLB. b. ELLB. c. EE. d. IEEE.
The conversion of ammonium cyanide to urea is a second-order reaction. This means that the concentration C of ammonium cyanide at time t is given by 
, where 
is the initial concentration and k is the rate constant. Assume the initial concentration is known to be 0.1 mol/L exactly. Assume that time can be measured with negligible uncertainty.
a. After 45 minutes, the concentration of ammonium cyanide is measured to be 0.0811 ± 0.0005 mol/L. Estimate the rate constant k, and find the uncertainty in the estimate. b. Use the result in part (a) to estimate the time when the concentration of ammonium cyanide will be 0.0750 mol/L, and find the uncertainty in this estimate.
Match the potential injury in the first column with the associated refrigerant hazard in the second column
A. Exposure to liquid refrigerant B. Large release of refrigerant in enclosed space C. Release of an A3 or B3 refrigerant D. Exposure to a B1, B2, or B3 refrigerant 1. Explosion 2. Frostbite 3. Cardiac arrest 4. Asphyxiation What will be an ideal response?
You will never stop learning better ways to solve problems if you are open to _____.