This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: _____ are massive objects destined to become planets. A) Planetesimals B) Protoplanets C) ... (Read 57 times)

tiffannnnyyyyyy

  • Hero Member
  • *****
  • Posts: 512
on: Jul 27, 2018
_____ are massive objects destined to become planets.
 
  A) Planetesimals
  B) Protoplanets
  C) Preplanets
  D) Pseudoplanets

Question 2

Which of the following statements is true in the context of radioactive elements?
 
  A) The abundances of the daughter isotopes of radioactive elements in a rock gradually decrease.
  B) The abundance of a radioactive element in a rock gradually decreases.
  C) Uranium-238 has the longest half-life among all the other radioactive substances.
  D) Potassium-40 has the longest half-life among all the other radioactive substances.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

bdobbins

  • Sr. Member
  • ****
  • Posts: 326
Reply #1 on: Jul 27, 2018
Answer to Question 1

B

Answer to Question 2

B


tiffannnnyyyyyy

  • Hero Member
  • *****
  • Posts: 512
Reply #2 on: Jul 27, 2018
Thank you!


bdobbins

  • Sr. Member
  • ****
  • Posts: 326
Reply #3 on: Jul 27, 2018
Always glad to help...


« previous next »
 

Did you know?

The average office desk has 400 times more bacteria on it than a toilet.

Did you know?

Barbituric acid, the base material of barbiturates, was first synthesized in 1863 by Adolph von Bayer. His company later went on to synthesize aspirin for the first time, and Bayer aspirin is still a popular brand today.

Did you know?

Green tea is able to stop the scent of garlic or onion from causing bad breath.

Did you know?

IgA antibodies protect body surfaces exposed to outside foreign substances. IgG antibodies are found in all body fluids. IgM antibodies are the first type of antibody made in response to an infection. IgE antibody levels are often high in people with allergies. IgD antibodies are found in tissues lining the abdomen and chest.

Did you know?

Drug abusers experience the following scenario: The pleasure given by their drug (or drugs) of choice is so strong that it is difficult to eradicate even after years of staying away from the substances involved. Certain triggers may cause a drug abuser to relapse. Research shows that long-term drug abuse results in significant changes in brain function that persist long after an individual stops using drugs. It is most important to realize that the same is true of not just illegal substances but alcohol and tobacco as well.

The Sun and the Planets The Sun and the Planets
The Inner Planets: A Comparison The Inner Planets: A Comparison
9-18 Kuiper Belt Objects 9-18 Kuiper Belt Objects
The end of a box-end wrench is angled 15 degrees to allow clearance for nearby objects or other ... The end of a box-end wrench is angled 15 degrees to allow clearance for nearby objects or other ...
The end of a box-end wrench is angled 15 degrees to allow clearance for nearby objects or other ... The end of a box-end wrench is angled 15 degrees to allow clearance for nearby objects or other ...
Reflectivity of Inner Planets Reflectivity of Inner Planets
Video: Oxygen - hemoglobin dissociation curve & Hemoglobin's affinity with oxygen - acidity

For a complete list of videos, visit our video library