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 57 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?

Cucumber slices relieve headaches by tightening blood vessels, reducing blood flow to the area, and relieving pressure.

Did you know?

A cataract is a clouding of the eyes' natural lens. As we age, some clouding of the lens may occur. The first sign of a cataract is usually blurry vision. Although glasses and other visual aids may at first help a person with cataracts, surgery may become inevitable. Cataract surgery is very successful in restoring vision, and it is the most frequently performed surgery in the United States.

Did you know?

More than nineteen million Americans carry the factor V gene that causes blood clots, pulmonary embolism, and heart disease.

Did you know?

Pregnant women usually experience a heightened sense of smell beginning late in the first trimester. Some experts call this the body's way of protecting a pregnant woman from foods that are unsafe for the fetus.

Did you know?

Hip fractures are the most serious consequences of osteoporosis. The incidence of hip fractures increases with each decade among patients in their 60s to patients in their 90s for both women and men of all populations. Men and women older than 80 years of age show the highest incidence of hip fractures.

Hand position for palpation for posterior thorax excursion Hand position for palpation for posterior thorax excursion
Surgical Hand Hygiene/Sterile Scrub Surgical Hand Hygiene/Sterile Scrub
Nomogram chart. This example shows a line drawn from a child’s height of 100 cm to his weight, 35 ... Nomogram chart. This example shows a line drawn from a child’s height of 100 cm to his weight, 35 ...
The relationship between the height of the firing line and length of the spark line can be ... The relationship between the height of the firing line and length of the spark line can be ...
Transverse friction to the plantar aponeurosis with the thumb. Brace the foot with one hand while ... Transverse friction to the plantar aponeurosis with the thumb. Brace the foot with one hand while ...
Squeeze hands and fingers. Compress and broaden the hand. Squeeze along each finger. Squeeze hands and fingers. Compress and broaden the hand. Squeeze along each finger.
Video: Exercise and cardiac output

For a complete list of videos, visit our video library