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 74 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?

Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.

Did you know?

Acetaminophen (Tylenol) in overdose can seriously damage the liver. It should never be taken by people who use alcohol heavily; it can result in severe liver damage and even a condition requiring a liver transplant.

Did you know?

Always store hazardous household chemicals in their original containers out of reach of children. These include bleach, paint, strippers and products containing turpentine, garden chemicals, oven cleaners, fondue fuels, nail polish, and nail polish remover.

Did you know?

A headache when you wake up in the morning is indicative of sinusitis. Other symptoms of sinusitis can include fever, weakness, tiredness, a cough that may be more severe at night, and a runny nose or nasal congestion.

Did you know?

Interferon was scarce and expensive until 1980, when the interferon gene was inserted into bacteria using recombinant DNA technology, allowing for mass cultivation and purification from bacterial cultures.

When young infants hold objects for a long period of time they eventually become habituated to them. When young infants hold objects for a long period of time they eventually become habituated to them.
Right-hand Rule Right-hand Rule
Finish by holding the hand briefly. Finish by holding the hand briefly.
Apply long effleurage stroke to entire arm, from hand to shoulder. Brush off from shoulder to hand. ... Apply long effleurage stroke to entire arm, from hand to shoulder. Brush off from shoulder to hand. ...
Seven-week embryo showing development of arm, forearm, and hand Seven-week embryo showing development of arm, forearm, and hand
Video: Gas exchange - partial pressure, locations, external and internal respiration

For a complete list of videos, visit our video library