SOLUTION: (1)The half-life of Palladium-100 is 4 days. After 20 days a sample of Palladium-100 has been reduced to a mass of 2 mg. What was the initial mass (in mg) of the sample?
What is t
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What is t
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Question 586574: (1)The half-life of Palladium-100 is 4 days. After 20 days a sample of Palladium-100 has been reduced to a mass of 2 mg. What was the initial mass (in mg) of the sample?
What is the mass 4 weeks after the start?
(2)A wooden artifact from an ancient tomb contains 50 percent of the carbon-14 that is present in living trees. How long ago was the artifact made? (The half-life of carbon-14 is 5730 years.)
Your answer is how many years.
(3)At the beginning of an experiment, a scientist has 196 grams of radioactive goo. After 270 minutes, her sample has decayed to 3.0625 grams.
What is the half-life of the goo in minutes?
Find a formula for G(t), the amount of goo remaining at time t. G(t) =
How many grams of goo will remain after 38 minutes?
(4)The decibel level of a sound is given by dB = 10log(\frac{E}{E_0}), where E_0 = 10^{-12} \: \frac{\text{watts}}{m^2} and E is the intensity of the sound.
(a) Find the intensity of a 120-decibel sound.
E = watts per square meter.
(b) How many times more intense is the sound from (a) than a 60-decibel sound?
A sound at 120 decibels is times more intense than a sound at 60 decibels.
