« previous next »

Author Question: Does the centripetal force acting on an object do work on the object? A) no, because the object ... (Read 221 times)

ts19998

  • Hero Member
  • *****
  • Posts: 531
on: Jul 27, 2018
Does the centripetal force acting on an object do work on the object?
 
  A) no, because the object has constant speed
  B) yes, since it takes energy to turn an object
  C) yes, since a force acts and the object moves, and work is force times distance
  D) no, because the force and the displacement of the object are perpendicular
  E) yes, because the force and the displacement of the object are perpendicular

Question 2

When multiplying several quantities, the number of significant digits in the result must always be
 
  A) larger than the number of significant digits in the most accurate of the quantities.
  B) equal to the number of significant digits in the most accurate of the quantities.
  C) equal to the average number of significant digits in the most and least accurate of the quantities.
  D) equal to the number of significant digits in the least accurate of the quantities.
  E) smaller than the number of significant digits in the least accurate of the quantities.


kingfahad97

  • Sr. Member
  • ****
  • Posts: 308
Reply #1 on: Jul 27, 2018
Answer to Question 1

D

Answer to Question 2

D


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

People who have myopia, or nearsightedness, are not able to see objects at a distance but only up close. It occurs when the cornea is either curved too steeply, the eye is too long, or both. This condition is progressive and worsens with time. More than 100 million people in the United States are nearsighted, but only 20% of those are born with the condition. Diet, eye exercise, drug therapy, and corrective lenses can all help manage nearsightedness.

Did you know?

Bisphosphonates were first developed in the nineteenth century. They were first investigated for use in disorders of bone metabolism in the 1960s. They are now used clinically for the treatment of osteoporosis, Paget's disease, bone metastasis, multiple myeloma, and other conditions that feature bone fragility.

Did you know?

Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.

Did you know?

The tallest man ever known was Robert Wadlow, an American, who reached the height of 8 feet 11 inches. He died at age 26 years from an infection caused by the immense weight of his body (491 pounds) and the stress on his leg bones and muscles.

Did you know?

Medication errors are three times higher among children and infants than with adults.

The work of Charles Darwin forms the foundation for modern evolutionary theory. The work of Charles Darwin forms the foundation for modern evolutionary theory.
Decapods, from Ernst Haeckel's 1904 work Kunstformen der Natur Decapods, from Ernst Haeckel's 1904 work Kunstformen der Natur
Part of this child's pattern of daily living is attending child care during the work day Part of this child's pattern of daily living is attending child care during the work day
Where Professional Psychologists Work Primary employment settings for PhD recipients in psychology. Where Professional Psychologists Work Primary employment settings for PhD recipients in psychology.
Question about Resultant of gravitational force? Question about Resultant of gravitational force?
Question about Resultant of gravitational force? Question about Resultant of gravitational force?
Video: The Nerve Impulse

For a complete list of videos, visit our video library