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 63 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?

Many supplement containers do not even contain what their labels say. There are many documented reports of products containing much less, or more, that what is listed on their labels. They may also contain undisclosed prescription drugs and even contaminants.

Did you know?

According to the CDC, approximately 31.7% of the U.S. population has high low-density lipoprotein (LDL) or "bad cholesterol" levels.

Did you know?

It is important to read food labels and choose foods with low cholesterol and saturated trans fat. You should limit saturated fat to no higher than 6% of daily calories.

Did you know?

The immune system needs 9.5 hours of sleep in total darkness to recharge completely.

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.

Anopheles larva from southern Germany, about 8 mm long Anopheles larva from southern Germany, about 8 mm long
Tactile Fremitus, Using Ulnar Aspect of Hand Tactile Fremitus, Using Ulnar Aspect of Hand
Range of Motion of the Wrist and Hand Joints, Hyperextension and Flexion of the Wrist Range of Motion of the Wrist and Hand Joints, Hyperextension and Flexion of the Wrist
One-handed kneading. Tissues are lifted with the whole hand in firm contact. One-handed kneading. Tissues are lifted with the whole hand in firm contact.
Control you knife with one hand and hold the item being cut with the other (1 of 3) Control you knife with one hand and hold the item being cut with the other (1 of 3)
Video: Major Elements in Biological Molecules: Proteins

For a complete list of videos, visit our video library