« previous next »

Author Question: An observer located at Earth's North Pole (90N latitude) would observe that all of the stars a) ... (Read 18 times)

bcretired

  • Hero Member
  • *****
  • Posts: 525
on: Jul 28, 2018
An observer located at Earth's North Pole (90N
  latitude) would observe that all of the stars
  a) move eastward across the sky.
  b) rise in the east and set in the west.
  c) move in concentric circles about the North Star.
  d) are completely stationary in the sky.

Question 2

A 0.40-kg particle moves under the influence of a single conservative force. At point A where the particle has a speed of 10 m/s, the potential energy associated with the conservative force is +40 J. As the particle moves from A to B, the force does +25 J of work on the particle. What is the value of the potential energy at point B?
 a. +65 J
  b. +15 J
  c. +35 J
  d. +45 J
  e. 40 J


Sammyo

  • Sr. Member
  • ****
  • Posts: 329
Reply #1 on: Jul 28, 2018
Answer to Question 1

c

Answer to Question 2

b


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

As the western states of America were settled, pioneers often had to drink rancid water from ponds and other sources. This often resulted in chronic diarrhea, causing many cases of dehydration and death that could have been avoided if clean water had been available.

Did you know?

The Food and Drug Administration has approved Risperdal, an adult antipsychotic drug, for the symptomatic treatment of irritability in children and adolescents with autism. The approval is the first for the use of a drug to treat behaviors associated with autism in children. These behaviors are included under the general heading of irritability and include aggression, deliberate self-injury, and temper tantrums.

Did you know?

More than one-third of adult Americans are obese. Diseases that kill the largest number of people annually, such as heart disease, cancer, diabetes, stroke, and hypertension, can be attributed to diet.

Did you know?

When taking monoamine oxidase inhibitors, people should avoid a variety of foods, which include alcoholic beverages, bean curd, broad (fava) bean pods, cheese, fish, ginseng, protein extracts, meat, sauerkraut, shrimp paste, soups, and yeast.

Did you know?

In 1886, William Bates reported on the discovery of a substance produced by the adrenal gland that turned out to be epinephrine (adrenaline). In 1904, this drug was first artificially synthesized by Friedrich Stolz.

The "Emu in the sky," a constellation defined by dark clouds rather than the stars. The "Emu in the sky," a constellation defined by dark clouds rather than the stars.
The monthly changes of angle between the direction of illumination by the Sun and viewing from Earth The monthly changes of angle between the direction of illumination by the Sun and viewing from Earth
Heaven or earth? Heaven or earth?
Patterns of North American Religion Patterns of North American Religion
Natural Hazards: Earth's Processes as Hazards, Disasters, and Catastrophes, 4th Edition Natural Hazards: Earth's Processes as Hazards, Disasters, and Catastrophes, 4th Edition
Earth-Moon-Sun Positions during the Spring Tide Earth-Moon-Sun Positions during the Spring Tide
Video: Non-specific disease resistance mechanisms & Skin's defense barriers

For a complete list of videos, visit our video library