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

Author Question: A roofer lifts supplies a height of 20. m with a hand-operated winch. How long would it take him to ... (Read 5 times)

arivle123

  • Hero Member
  • *****
  • Posts: 569
on: Jul 27, 2018
A roofer lifts supplies a height of 20. m with a hand-operated winch. How long would it take him to lift a 200. kg load, if the winch has an efficiency of 90, and the rate at which the winch can do work is 0.80 hp?
 
  What will be an ideal response?

Question 2

The Earth is divided into 24 time zones, in each of which local time differs by 1 hour. At 45 N latitude, what is the width of a time zone? (The Earth's radius is 6370 km.
 
  45 N latitude is about as far North as Portland, Oregon, and is halfway between the equator and the North pole.)


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

morganmarie791

  • Sr. Member
  • ****
  • Posts: 336
Reply #1 on: Jul 27, 2018
Answer to Question 1

73. seconds

Answer to Question 2

1179 km


arivle123

  • Hero Member
  • *****
  • Posts: 569
Reply #2 on: Jul 27, 2018
Thank you!


morganmarie791

  • Sr. Member
  • ****
  • Posts: 336
Reply #3 on: Jul 27, 2018
Always glad to help...


« previous next »
 

Did you know?

Elderly adults are living longer, and causes of death are shifting. At the same time, autopsy rates are at or near their lowest in history.

Did you know?

Although puberty usually occurs in the early teenage years, the world's youngest parents were two Chinese children who had their first baby when they were 8 and 9 years of age.

Did you know?

The most destructive flu epidemic of all times in recorded history occurred in 1918, with approximately 20 million deaths worldwide.

Did you know?

The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.

Did you know?

All adults should have their cholesterol levels checked once every 5 years. During 2009–2010, 69.4% of Americans age 20 and older reported having their cholesterol checked within the last five years.

Hand Washing Using Soap and Water Hand Washing Using Soap and Water
Measuring Adult Weight and Height Measuring Adult Weight and Height
Surgical Hand Hygiene/Sterile Scrub Surgical Hand Hygiene/Sterile Scrub
Squeeze posterior leg muscles. Apply along muscles from knee to ankle. Use same hand position as in ... Squeeze posterior leg muscles. Apply along muscles from knee to ankle. Use same hand position as in ...
Use a full hand/flat of fingers to apply L stroke to face, below the eye and to the edge of the ... Use a full hand/flat of fingers to apply L stroke to face, below the eye and to the edge of the ...
Human activity has released carbon from sequestration in long-term reservoirs Human activity has released carbon from sequestration in long-term reservoirs
Video: Rods and Cones Animation

For a complete list of videos, visit our video library