A strong earthquake in Samar released 8.30x10^15 joules of Energy. What is the magnitude of the earthquake? Round-off your answer to two decimal places

Q: A wooden artifact from an ancient tomb contains 20 percent of the carbon-14 that is present in…

A:

Q: The 2013 earthquake in Bohol and Cebu had a magnitude of 7.2, while the 2012 earthquake that…

A: The Formula for the Richter scale is defined as, R=23logE104.4 it can be written as,…

Q: What is the magnitude in the Richter scale of an earthquake that released 10 joules of energy? (5

A: Direct use the formula of Richter Scale and substitute the given values then simplify.

Q: Calculate without using a calculator ln(e3) + ln(e4)

A: According to the power rule of logarithm, ln xa=aln x.  Use the power rule of logarithm to simplify…

Q: Carbon 14 has a half life of 5730 years. An archeologist uncovers human remains and finds that 76.6%…

A: The initial amount of carbon=P= 100% =1  Final amount of carbon= A= 76.6%= 0.766 time = t (in years)…

Q: How many times as loud is a' sound at 140 decibels than a sound at 70 decibels?

A: We have to use loudness od sound in decibals formulae.

Q: Red is observing an abnormal unit of 14 pins per 2 miles. He wants to know if this is the same as…

A: Solution :-              Red is observing an abnormal unit of 14 pins per2miles. He wants to know if…

Q: The half-life of radium is 1690 years. If 40 grams are present now, how much will be present in 690…

A: Given: The half-life of radium is 1690 years. if 40grams are present now.

Q: The Great Earthquake registered a magnitude of 8.5 on the Richter scale. What was the intensity of…

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Q: The 2011 Tohoku earthquake in Japan, one of the strongest ever recorded, released 3 .9 x 1029 ergs…

A: Given: Energy released by Tohoku is 3.9×1029 ergs. Energy released by Mild earthquake is 1021 ergs.…

Q: A healthy heart beats 70 to 90 times per minute. Estimate the number of heartbeats in the lifetime…

A: We have, A healthy heart beats 70 to 90 times per minute.  Therefore, for an average 70 beats/…

Q: A patient is adminstered a dose of 50 mg of a drug. If the body naturally disposes of 3% of the drug…

A: Amount of drug administered: 50mg Rate of decrease of drug every hour=3% To find amount of drug left…

Q: How long a tape does a police officer need to record a 2 minute video confession at an operating…

A:

Q: Which is larger, 2 ln 5 or 3 ln 3? Explain

A: Given: 2ln5 & 3ln3 We know that, 2ln5=3.21887⇒2ln5=3.22And3ln3=3.29583⇒3ln3=3.29

Q: Forty grams of a certain radioactive material disintegrates to 16 grams in 220 years. How much of…

A: Radioactive material follows first order kinetics equation - k = 1tlnA0AA0 = Initial amount = 40 gmA…

Q: Each side of a square is increasing at a rate of 2 cm/s. At what rate is the area of the square…

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Q: Estimate how many times a dart will hit the new bull's eye if 50 darts hit the target. Round your…

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Q: The half-life of radium is 1690 years. If 30 grams are present now, how much will be present in 140…

A:

Q: Everything related Calculate volumes of revolution

A: Solution is given as below:

Q: A sample of radioactive material disintegrates from 6 to 5 grams in 150 days. After how many days…

A:

Q: The half-life of radium is 1690 years. If 30 grams are present now, how much will be present in 570…

A: We have to finds the remaining amount

Q: If a Paramecium is about 390 micrometers long, how many centimeters is it? Express in real numbers…

A:

Q: Find the hourly wage for a person with an income of $44762, who works 54 hours a week for 47 weeks.…

A: Here we have to find the hourly income of a person

Q: The half-life of the radioactive element krypton-91 is 10 seconds. If 16 grams of Question…

A: Given: Half life of Krypton-91 = 10 seconds Initial amount of Krypton-91 = 16 gm We have to find how…

Q: In an insect colony, there are 280 insects after 9 days. If there were initially 90 insects, how…

A:

Q: A wooden artifact from an ancient tomb contains 50 percent of the carbon-14 that is present in…

A:

Q: A radioactive isotope, selenium, used in the creation of medical images of the pancreas, has a…

A:

Q: Calculate without using a calculator. ln(e3) + ln(e4)

A:

Q: why can't we divide by zero epsilon-delta?

A: I have proved using epsilon delta

Q: An isotope has a half-life of 98 years. How much of a 16-gram sample is left after 150 years?

A:

Q: If a person is paid $490 for 21 hours of work, what is the person's hourly wage? The person's wage…

A: Given:Amount paid to person = $490Number of hours worked = 21 hours

Q: a radioactive isotope, selenium, used in the creation of medical images of the pancreas, has a…

A: To use the exponential model of radioactivity to determine the required amount of substance

Q: The half-life of silicon-32 is 710 years. If 70 grams is present now, how much will be present in…

A: The equation governing mass at any time t will be: m(t) = m0e-kt where k = 0.693 / t1/2 = 0.693 /…

Q: What is the magnitude in the Richter scale of an earthquake that released 100 million joules of…

A: It is given that An earthquake that released 100 million joules of energy

Q: Find the hourly wage for a person with an income of 71190 who works 78 hours a week for 49 weeks…

A: We have to find hourly wage

Q: The half-life of Radium-226 is 1590 years. If a sample contains 400 mg, how many mg will remain…

A:

Q: A wooden artifact from an ancient tomb contains 25 percent of the carbon-14 that is present in…

A: For the given wooden artifact which contains 25 % of C-14 half life is 5730 years  Number of years…

Q: A culture of 100 bacteria grows to 150 after 2 hours. How long will it take to double in size?…

A: Condition 1: At t=0, P(0)=P0=100   Condition 2: At t=2, P(2)=150   If P(t)=2P0, then find t (in…

Q: The half life of radium is 1690years. If 59 grams are present now, how much will be present in 60…

A: Let A(t) be the amount remaining in t years, then

Q: A chemical substance has a half-life of 5 hours.How much of a 107-gram sample remains after 12…

A: In this question we have to find sample remain after 12 hour. Formula used N=N0*(1/2)^t/t1/2

Q: Predict the U.S. emissions for a year when the non-U.S. emissions level is 3.4 Round the answer to…

A: ( c ) The U.S emissions are predicted to be --------- metric tons.

Q: A certain radio isotope has a half-life of 12 years. Find the mass that remains from a 220mg sample…

A: Half life = 12 yrs 220 mg is the initial mass Therefore decay constant = ln2 / half- life

Q: Use a calculator to approximate the exponential expression to 4 decimal places. 2 (Round to four…

A: Given: The exponential function e4

Q: Assume a large vehicle holds 75 gallons of fuel and can travel 979 miles on a full tank. What is the…

A: Gas mileage per gallon: Estimate how much spending on gasoline in an average month, or estimate the…

Q: The half life of radium is 1690 years. if 50 grams are present now,how much will be present in 520…

A:

Q: Battery life span in hours

A: Calculations for the given sample:

Q: The half-life of radium is 1690 years. If 50 grams are present now, how much will be present in 580…

A: Since it is given that half-life of radium is 1690 years.Our aim is to calculate that how much…

Q: The field inside a running track is made up of a rectangle 87.5 meters long and 72 meters wide,…

A: We will draw the diagram, then will find the area.

Q: A particular drug is eliminated from the blood with a half-life of 12 hours. If a person has 100 mg…

A: Given that: Initial amount= P0 = 100 mg Half time= H= 12 hours Time=t =6 hours Final amount=P…

Q: The half-life of radium is 1690 years. If 90 grams are present now, how much will be present in 370…

A: