Please show me the steps 1/ Suppose a laser weapon is developed to destroy satel

Question

Please show me the steps

1/ Suppose a laser weapon is developed to destroy satellites. Light waves (the laser beam) travel at a speed of 3.00 x 1008 meters per second. How many miles away is a satellite if it takes 1.69 milliseconds for the laser beam to reach the satellite? (5280 ft = 1 mile)

2/ In 1618, the Pharmacopoeia of London defined the following mass units to be used in the preparation of drugs.

20 grains = 1 scruple ; 3 scruples = 1 drachm ; 8 drachms = 1 ounce ; 12 ounces = 1 pound

How many grains would have been present in 12.2 pounds (as defined above) of aspirin?

3/ Perform the following calculation and round the answer to the correct number of significant figures (units of measurement have been omitted).

5.04 x 1004 / (2.5 x 548.7)

4/ How many decigrams is 289 kilograms?

5/ The density of a liquid is 1.35 g/mL. How many quarts of the liquid are present in 25.9 ounces of the liquid? (16 oz = 1 lb)

Explanation / Answer

5).

1lb=16oz

1oz= 28.35gm

1quirt= 1.136

answer 0.872

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