« previous next »

Author Question: If a cosmic-ray proton, an alpha particle, and a 6Li nucleus all have the same kinetic energy, then ... (Read 96 times)

mp14

  • Hero Member
  • *****
  • Posts: 534
on: Jul 28, 2018
If a cosmic-ray proton, an alpha particle, and a 6Li nucleus all have the same kinetic energy, then which one has the lowest speed?
 a. the proton
  b. the 6Li nucleus
  c. the alpha particle
  d. All cosmic rays have the same speed, c.

Question 2

A 1-gram sample of wood is taken from an ancient site. If the Carbon-14 activity of the sample is 12.5 that of present-day organic material, what is the age of the wood? (T1/2 for 14C is 5730 years.)
 a. 8600 years
  c. 11,500 years
  b. 4460 years
  d. 17,200 years


hollysheppard095

  • Sr. Member
  • ****
  • Posts: 339
Reply #1 on: Jul 28, 2018
Answer to Question 1

B

Answer to Question 2

D


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Cocaine was isolated in 1860 and first used as a local anesthetic in 1884. Its first clinical use was by Sigmund Freud to wean a patient from morphine addiction. The fictional character Sherlock Holmes was supposed to be addicted to cocaine by injection.

Did you know?

Though newer “smart” infusion pumps are increasingly becoming more sophisticated, they cannot prevent all programming and administration errors. Health care professionals that use smart infusion pumps must still practice the rights of medication administration and have other professionals double-check all high-risk infusions.

Did you know?

As many as 28% of hospitalized patients requiring mechanical ventilators to help them breathe (for more than 48 hours) will develop ventilator-associated pneumonia. Current therapy involves intravenous antibiotics, but new antibiotics that can be inhaled (and more directly treat the infection) are being developed.

Did you know?

Children of people with alcoholism are more inclined to drink alcohol or use hard drugs. In fact, they are 400 times more likely to use hard drugs than those who do not have a family history of alcohol addiction.

Did you know?

Stevens-Johnson syndrome and Toxic Epidermal Necrolysis syndrome are life-threatening reactions that can result in death. Complications include permanent blindness, dry-eye syndrome, lung damage, photophobia, asthma, chronic obstructive pulmonary disease, permanent loss of nail beds, scarring of mucous membranes, arthritis, and chronic fatigue syndrome. Many patients' pores scar shut, causing them to retain heat.

Artist's rendition of the view from a hypothetical airless planet orbiting Alpha Centauri A Artist's rendition of the view from a hypothetical airless planet orbiting Alpha Centauri A
Effect of the activation energy barrier. Effect of the activation energy barrier.
Energy of reactant molecules. Energy of reactant molecules.
Nuclear energy Nuclear energy
"No Oven Needed" Energy Bars Try this recipe as an inexpensive alternative to commercial ... "No Oven Needed" Energy Bars Try this recipe as an inexpensive alternative to commercial ...
How much energy is needed to heat 77.0g H2O(s) from -10.0 C to 0.0 C? How much energy is needed to heat 77.0g H2O(s) from -10.0 C to 0.0 C?
Video: Introduction to Pre-eclampsia

For a complete list of videos, visit our video library