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

Author Question: During the eighteenth and nineteenth centuries, attempts to precisely measure the astronomical unit ... (Read 78 times)

serike

  • Hero Member
  • *****
  • Posts: 542
on: Jul 27, 2018
During the eighteenth and nineteenth centuries, attempts to precisely measure the astronomical unit relied largely on rare
 
  A) total solar eclipses.
  B) transits of the inferior planets across the Sun.
  C) passages of comets close to the Earth.
  D) maximum elongations of Venus.
  E) oppositions of Mars.

Question 2

Most interstellar clouds remain stable in size because the force of gravity is opposed by ________ within the cloud.
 
  A) degeneracy pressure
  B) radiation pressure
  C) stellar winds
  D) thermal pressure


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

mcomstock09

  • Sr. Member
  • ****
  • Posts: 377
Reply #1 on: Jul 27, 2018
Answer to Question 1

B

Answer to Question 2

D


serike

  • Hero Member
  • *****
  • Posts: 542
Reply #2 on: Jul 27, 2018
Both answers were spot on, thank you once again


mcomstock09

  • Sr. Member
  • ****
  • Posts: 377
Reply #3 on: Jul 27, 2018
Great! Please up vote :D


« previous next »
 

Did you know?

Children with strabismus (crossed eyes) can be treated. They are not able to outgrow this condition on their own, but with help, it can be more easily corrected at a younger age. It is important for infants to have eye examinations as early as possible in their development and then another at age 2 years.

Did you know?

The term bacteria was devised in the 19th century by German biologist Ferdinand Cohn. He based it on the Greek word "bakterion" meaning a small rod or staff. Cohn is considered to be the father of modern bacteriology.

Did you know?

A recent study has found that following a diet rich in berries may slow down the aging process of the brain. This diet apparently helps to keep dopamine levels much higher than are seen in normal individuals who do not eat berries as a regular part of their diet as they enter their later years.

Did you know?

Multiple sclerosis is a condition wherein the body's nervous system is weakened by an autoimmune reaction that attacks the myelin sheaths of neurons.

Did you know?

In 1864, the first barbiturate (barbituric acid) was synthesized.

A structural gene as a transcriptional unit A structural gene as a transcriptional unit
Defibrillator. Defibrillators are devices that supply a voltage charge to the heart in the hope of r Defibrillator. Defibrillators are devices that supply a voltage charge to the heart in the hope of r
Calipers being used to measure body fat on the triceps of a patient. Calipers being used to measure body fat on the triceps of a patient.
For centuries, widows in the Mediterranean countries, such as thise widow in Greece, were expected ... For centuries, widows in the Mediterranean countries, such as thise widow in Greece, were expected ...
Using the voltmeter leads from a starting and charging test unit to measure the voltage drop ... Using the voltmeter leads from a starting and charging test unit to measure the voltage drop ...
A dual-nozzle TBI unit on a Chevrolet 5.0 L V-8 engine. The fuel is squirted above the throttle ... A dual-nozzle TBI unit on a Chevrolet 5.0 L V-8 engine. The fuel is squirted above the throttle ...
Video: The Hypothalamus: The Body's Thermostat (Human Thermostat)

For a complete list of videos, visit our video library