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 70 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?

Side effects from substance abuse include nausea, dehydration, reduced productivitiy, and dependence. Though these effects usually worsen over time, the constant need for the substance often overcomes rational thinking.

Did you know?

Your heart beats over 36 million times a year.

Did you know?

Hypertension is a silent killer because it is deadly and has no significant early symptoms. The danger from hypertension is the extra load on the heart, which can lead to hypertensive heart disease and kidney damage. This occurs without any major symptoms until the high blood pressure becomes extreme. Regular blood pressure checks are an important method of catching hypertension before it can kill you.

Did you know?

In 2010, opiate painkllers, such as morphine, OxyContin®, and Vicodin®, were tied to almost 60% of drug overdose deaths.

Did you know?

There are more bacteria in your mouth than there are people in the world.

Differently shaped objects were placed in the nests of robins and catbirds. Differently shaped objects were placed in the nests of robins and catbirds.
Multiple Planets Multiple Planets
The Inner Planets: A Comparison The Inner Planets: A Comparison
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 ...
(A) In hyperopia, light rays focus behind the retina, making it difficult to focus on objects at ... (A) In hyperopia, light rays focus behind the retina, making it difficult to focus on objects at ...
Planets Planets
Video: Action potentials - electrical characteristics and generation

For a complete list of videos, visit our video library