uring the Enhanced Community Quarantine of COVID 19 Pandemic the mandate for the People in our country is to stay home. Kindly identify 5 displacements as you move inside your house. Determine your resultant displacement using component method. Magnitude dx dy Vector Displacement 1 Displacement 2 Displacement 3 Displacement 4 Displacement 5 Edx = Edy-

uring the Enhanced Community Quarantine of COVID 19 Pandemic the mandate for the People in our country is to stay home. Kindly identify 5 displacements as you move inside your house. Determine your resultant displacement using component method. Magnitude dx dy Vector Displacement 1 Displacement 2 Displacement 3 Displacement 4 Displacement 5 Edx = Edy-

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter32: Medical Applications Of Nuclear Physics

Section: Chapter Questions

Problem 35PE: The power output of the Sun is 41026W. (a) If 90% of this is supplied by the protonproton cycle, how...

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Raymond Davis Jr.’s neutrino detector contained approximately 1030 chlorine atoms. During his experiment, he found that one neutrino reacted with a chlorine atom to produce one argon atom each day. A. How many days would he have to run the experiment for 1% of his tank to be filled with argon atoms? B. Convert your answer from A. into years. C. Compare this answer to the age of the universe, which is approximately 14 billion years (1.41010y) . D. What does this tell you about how frequently neutrinos interact with matter?
1. A radioactive substance with an initial mass of 250 mg has a half-life of 1 year. a) Write an equation to relate the mass of radioactive material remaining to time b) What mass will remain after 10 years? c) How long will it take the initial sample to decay to 20% of its initial mass? (Please show how you arrived at your answer by showing all of your calculations.)
A radioactive substance has a half life of 2120 years. A) Determine the rate constant for the decay of this substance. B) How long will it take for 80% of the substance to decay?
As of August 27, 2020, the Philippines, through the Department of Finance has already borrowed $ 8.83 billion to fight against the health and socioeconomic crises inflicted by the COVD19 pandemic. (a) If payments were made at the rate of $1000 per second, how many many years would it take to pay off the debt, assuming no interest was charged? A one-dollar bill is about 15.5 cm long. If $8.83 billion one-dollar were laid end to end around the Earth's equator, how many times would they encircle the planet? Take the radium of the Earth at the equator to be 6378 km.
Seawater contains 3 mg of uranium per cubic meter. (a) Given that the average ocean depth is about 4 km and water covers two - thirds of Earth’s surface, estimate the amount of uranium dissolved in the ocean. (b) Estimate how long this uranium could supply the world’s energy needs at the current usage of 1.5 x 1013 J/s. (c) Where does the dissolved uranium come from? Is it a renewable energy source? Can uranium from the ocean satisfy our energy requirements? Discuss. Note: Breeder reactors increase the efficiency of nuclear fuel use by approximately two orders of magnitude.
The first atomic bomb was detonated on July 16, 1945, at the Trinity test site about 200 mi south of Los Alamos. In 1947, the U.S. government declassified a film reel of the explosion. From this film reel, British physicist G.I. Taylor was able to determine the rate at which the radius of the fireball from the blast grew. Using dimensional analysis, he was then able to deduce the amount of energy released in the explosion, which was a closely guarded secret at the time. Because of this, Taylor did not publish his results until 1950. This problem challenges you to recreate this famous calculation. (a) Using keen physical insight developed from years of experience, Taylor decided the radius rof the fireball should depend only on time since the explosion, t, the density of the air, , and the energy of the initial explosion, E. Thus, he made the educated guess that r=kEabtcfor some dimensionless constant kand some unknown exponents a,b, and c. Given that [E]=ML2T-2 , determine the values of the exponents necessary to make this equation dimensionally consistent. (Hint: Notice the equation implies that k=rEabtcand that [k]=1 ). (b) By analyzing data from high-energy conventional explosives, Taylor found the formula he derived seemed to be valid as long as the constant khad the value 1.03. From the film reel, he was able to determine many values of rand the corresponding values of t. For example, he found that after 25.0 ms, the fireball had a radius of 130.0 m. Use these values, along with an average air density of 1.25kg/m3 , to calculate the initial energy release of the Trinity detonation in joules (J). (Hint: To get energy in joules, you need to make sure all the numbers you substitute in are expressed in terms of SI base units.) (c) The energy released in large explosions is often cited in units of “tons of TNT” (abbreviated “t TNT”), where 1 t TNT is about 4.2 GJ. Convert yow answer to (b) into kilotons of TNT (that is, kt TNT). Compare your answer with the quick-and-duty estimate of 10 kt TNT made by physicist Enrico Fermi shortly after witnessing the explosion from what was thought to be a safe distance. (Reportedly, Fermi made his estimate by dropping some shredded bits of paper right before the remnants of the shock wave hit him and looked to see how far they were carried by it.)
The story of a process makes the facts easier to remember, but easy recall is not the true goal of the scientist. What is the real value of understanding a scientific process?
A chain of nuclear reactions in the Suns core converts four protons into a helium nucleus. (a) What is the mass difference between four protons and a helium nucleus? (b) How much energy in MeV is released during the conversion of four protons into a helium nucleus?
What would happen to a life-form if the genetic information handed down to offspring was copied extremely inaccurately? How would that endanger the future of the life-form?
What is critical temperature Tc? Do all materials have a critical temperature? Explain why or why not.
The power output of the Sun is 41026W. (a) If 90% of this is supplied by the protonproton cycle, how many protons are consumed per second? (b) How many neutrinos per second should there be per square meter at the Earth from this process? This huge number is indicative of how rarely a neutrino interacts, since large detectors observe very few per day.
PROBLEM 1 What is the force of the horizontal rod in kN when the system is in equilibrium.. Determine the magnitude of W in kN so that the rod will be horizontal when the system is in equilibrium. PROBLEM 2 What is the reaction at A in kN? What is the reaction at B in kN? What is the reaction at C in kN? What is the reaction at D in kN?