PHYSICS PLEASE HELP!
If the half life of a given substance is 65 days, how long will it...
PHYSICS PLEASE HELP!
If the half life of a given substance is 65 days, how long will it take for a 100-gram sample of the substance to decay until there is only 25 grams of the radioactive material remaining?
if a sample of radioactive isotopes takes 60 minutes to decay from 200 grams to 50 grams, what is the half life of the isotope?
If a 500.0 g sample of technetium-99 decays to 62.5 g of technetium-99 remaining in 639,000 years, what is the half life of technetium-99?
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Which of the following is an example of motion in two dimensions?
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You are given a vector a = 125i and an unknown vector b that is perpendicular to a. the cross-product of these two vectors is a ร b = 98k. what is the y-component of vector b?
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The mass of a bowling ball is 10 kg and the mass of a ping pong ball is 0.015 kg. if the two objects are 5 meters apart, what is the gravitational force ?
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