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

Author Question: Lisa runs up 4 flights of stairs in 22. seconds. She weighs 510. Newtons. If each flight rises 310. ... (Read 120 times)

sc00by25

  • Hero Member
  • *****
  • Posts: 596
on: Jul 29, 2018
Lisa runs up 4 flights of stairs in 22. seconds. She weighs 510. Newtons. If each flight rises 310. cm:
 
  (a) What is her change in potential?
  (b) What average power (watts) was required during the 22. s?
  (c) What minimum horsepower motor would be required to do this?

Question 2

There are 640 acres in a square mile, and 5280 feet in one mile. How many acres are there in a hectare, a square one hundred meters on each side?
 
  What will be an ideal response?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

sylvia

  • Sr. Member
  • ****
  • Posts: 331
Reply #1 on: Jul 29, 2018
Answer to Question 1

(a) 6.32 kJ
(b) 287. watts
(c) 0.385 hp

Answer to Question 2

2.47 acres


sc00by25

  • Member
  • Posts: 596
Reply 2 on: Jul 29, 2018
Excellent

diana chang

  • Member
  • Posts: 288
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.

Did you know?

It is difficult to obtain enough calcium without consuming milk or other dairy foods.

Did you know?

In the United States, congenital cytomegalovirus causes one child to become disabled almost every hour. CMV is the leading preventable viral cause of development disability in newborns. These disabilities include hearing or vision loss, and cerebral palsy.

Did you know?

Patients who have undergone chemotherapy for the treatment of cancer often complain of a lack of mental focus; memory loss; and a general diminution in abilities such as multitasking, attention span, and general mental agility.

Did you know?

About one in five American adults and teenagers have had a genital herpes infection—and most of them don't know it. People with genital herpes have at least twice the risk of becoming infected with HIV if exposed to it than those people who do not have genital herpes.

Bat in Flight Bat in Flight
A Tau Emerald Hemicordulia tau in mid flight A Tau Emerald Hemicordulia tau in mid flight
A BQM-74E drone as it leaves the flight deck of a missile frigate. A BQM-74E drone as it leaves the flight deck of a missile frigate.
Anxiety rises as needs are not met. Without resolution, anxiety may lead to frustration, and then, ... Anxiety rises as needs are not met. Without resolution, anxiety may lead to frustration, and then, ...
Finish gently holding the head. Place palms of hands lightly over the ears for a few seconds. Slowly ... Finish gently holding the head. Place palms of hands lightly over the ears for a few seconds. Slowly ...
Video: Hormonal regulation of pregnancy - weeks 2 through 38

For a complete list of videos, visit our video library