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

Author Question: A runner in a race takes 2.7 seconds to go from the 40 meter mark to the 70 meter mark. (a) What is ... (Read 58 times)

Alainaaa8

  • Hero Member
  • *****
  • Posts: 576
on: Jul 28, 2018
A runner in a race takes 2.7 seconds to go from the 40 meter mark to the 70 meter mark. (a) What is the runner's speed? (b) How far would the runner go in 8 seconds if this speed is maintained? (c) How long did it take the runner to cover the first 40 m (assuming the same speed was maintained)?

Question 2

Which is a key difference between electric charges and magnetic poles?
 a. Electric charges can be separated while magnetic poles always occur together as opposite poles of equal strength.
  b. Magnetic monopoles exist but isolated electric charges are never found.
  c. Like electric charges repel but like magnetic poles attract.
  d. An electrically charged rod attracts an electrically neutral object but a magnet does not attract and unmagnetized chunk of iron.
  e. In electricity, unlike charges repel, but in magnetism, unlike poles attract.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

fur

  • Sr. Member
  • ****
  • Posts: 309
Reply #1 on: Jul 28, 2018
Answer to Question 1

1 m/s, 9 m, 3.6 s

Answer to Question 2

a


Alainaaa8

  • Member
  • Posts: 576
Reply 2 on: Jul 28, 2018
YES! Correct, THANKS for helping me on my review

zacnyjessica

  • Member
  • Posts: 345
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

Russia has the highest death rate from cardiovascular disease followed by the Ukraine, Romania, Hungary, and Poland.

Did you know?

In 1835 it was discovered that a disease of silkworms known as muscardine could be transferred from one silkworm to another, and was caused by a fungus.

Did you know?

Your skin wrinkles if you stay in the bathtub a long time because the outermost layer of skin (which consists of dead keratin) swells when it absorbs water. It is tightly attached to the skin below it, so it compensates for the increased area by wrinkling. This happens to the hands and feet because they have the thickest layer of dead keratin cells.

Did you know?

Warfarin was developed as a consequence of the study of a strange bleeding disorder that suddenly occurred in cattle on the northern prairies of the United States in the early 1900s.

Did you know?

Malaria mortality rates are falling. Increased malaria prevention and control measures have greatly improved these rates. Since 2000, malaria mortality rates have fallen globally by 60% among all age groups, and by 65% among children under age 5.

Respiratory Assistive Devices, Peak Flow Meter Respiratory Assistive Devices, Peak Flow Meter
Mark Rothko, Four Darks in Red. Mark Rothko, Four Darks in Red.
College Students, By Sex and Race-Ethnicity College Students, By Sex and Race-Ethnicity
Testing a dual cell wideband oxygen sensor can be done using a voltmeter or a scope. The meter ... Testing a dual cell wideband oxygen sensor can be done using a voltmeter or a scope. The meter ...
Set the meter to read ohms (V) and measure the resistance of the relay coil. The usual reading for ... Set the meter to read ohms (V) and measure the resistance of the relay coil. The usual reading for ...
How to convert from radians to degrees, minutes, seconds How to convert from radians to degrees, minutes, seconds
Video: Gastrin (gastric emptying) & Secretin (buffering gastric acid)

For a complete list of videos, visit our video library