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Two astronauts are 1.60 m apart in their spaceship. One speaks to the other. The conversation is transmitted to earth via electromagnetic waves. The time it takes for sound waves to travel at 328 m/s through the air between the astronauts equals the time it takes for the electromagnetic waves to travel to the earth. How far away from the earth is the spaceship?
how much energy in kilojoules is released when 33.0 rm g of ethanol vapor at 95.0circ rm c is cooled to -19.5circ rm c?
Glacial acetic acid is the concentrated form of acetic acid, the acid in vinegar. The term "glacial" refers to the appearance of the solid form, which resembles glacial ice. What is the melting point of this compound, in degrees Celsius, based on ..
a) What is the rate of disappearance of C5H6 at the same time? b) This reaction is second order. Write the rate law for this reaction.
Which of the following would be expected to have the highest pH?
Calculate the volume of each of the following gas samples at STP 8.1 mol c2h2, .255 mole ci,0440 mol co2, 24.1 mol n2o in L
For CH2CBr2, which geometric isomers do you suppose is energetically most stable; containing less repulsion energy: cis or trans
Modern oil tankers weigh over a half-million tons and have lengths of up to a quarter of a mile. Such massive ships require a distance of 5.0 km (about 3.0 mi) and a time of 20 min to come to a stop from a top speed of 30 km/h.
A point mass rotates in a circle with l = 2. Calculate the and the possible projections of the angular momentum on an arbitrary axis.
The conductivity of a solution can be measured easily with a probe that dips into a solution and a meter that reads out in siemens (1 siemens = 1 ohm-1). The equivalent conductance,
What may be concluded about the induced charge on the ice pail, as compared to the charge on the blue wand?
What is gel electrophoresis and what is the purpose of using an electrical current in this procedure?
Determine the approximate activation energy for the reaction that causes milk to sour at 37 degrees Celsius. Consider the above data to be equivalent to a factor of three change in the rate.
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