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 50 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
Thanks for the timely response, appreciate it

smrtceo

  • Member
  • Posts: 344
Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

« previous next »
 

Did you know?

IgA antibodies protect body surfaces exposed to outside foreign substances. IgG antibodies are found in all body fluids. IgM antibodies are the first type of antibody made in response to an infection. IgE antibody levels are often high in people with allergies. IgD antibodies are found in tissues lining the abdomen and chest.

Did you know?

Signs of depression include feeling sad most of the time for 2 weeks or longer; loss of interest in things normally enjoyed; lack of energy; sleep and appetite disturbances; weight changes; feelings of hopelessness, helplessness, or worthlessness; an inability to make decisions; and thoughts of death and suicide.

Did you know?

Vampire bats have a natural anticoagulant in their saliva that permits continuous bleeding after they painlessly open a wound with their incisors. This capillary blood does not cause any significant blood loss to their victims.

Did you know?

Hyperthyroidism leads to an increased rate of metabolism and affects about 1% of women but only 0.1% of men. For most people, this increased metabolic rate causes the thyroid gland to become enlarged (known as a goiter).

Did you know?

Of the estimated 2 million heroin users in the United States, 600,000–800,000 are considered hardcore addicts. Heroin addiction is considered to be one of the hardest addictions to recover from.

Comet Tempel 1 67 seconds after colliding with the Deep Impact probe. Comet Tempel 1 67 seconds after colliding with the Deep Impact probe.
Blood glucose measurement. A postprandial test may be self-administered. (a) A lance pierces the ski Blood glucose measurement. A postprandial test may be self-administered. (a) A lance pierces the ski
Much Exploration for Oil and Gas Takes Place in Remote Parts of the World Much Exploration for Oil and Gas Takes Place in Remote Parts of the World
Prevalence of Diabetes in the United States, 2010–2012, Age 20 and Older, Based on Race and ... Prevalence of Diabetes in the United States, 2010–2012, Age 20 and Older, Based on Race and ...
An Underwriters Laboratory mark. An Underwriters Laboratory mark.
Record the AC frequency as shown on the meter and subtract 50 from the reading (e.g., 60.50 -50.00 = ... Record the AC frequency as shown on the meter and subtract 50 from the reading (e.g., 60.50 -50.00 = ...
Video: Hormonal regulation of pregnancy - weeks 2 through 38

For a complete list of videos, visit our video library