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

Author Question: An open freight car rolls friction-free along a horizontal track in vertically pouring rain. As ... (Read 99 times)

jCorn1234

  • Hero Member
  • *****
  • Posts: 545
on: Jul 29, 2018
An open freight car rolls friction-free along a horizontal track in vertically pouring rain. As water accumulates in the car, its speed
 
  A) increases.
  B) decreases.
  C) doesn't change.

Question 2

Which of the following is considered by scientists to be physically real, but yet is not made of atoms or of other material particles such as protons, electrons, etc.?
 
  A) the air
  B) neutron stars
  C) electromagnetic fields
  D) the ether
  E) Nonsense--we have known since Democritus that everything is made only of atoms and empty space.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

ebenov

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

Answer: B

Answer to Question 2

C


jCorn1234

  • Member
  • Posts: 545
Reply 2 on: Jul 29, 2018
Gracias!

alexanderhamilton

  • Member
  • Posts: 334
Reply 3 on: Yesterday
:D TYSM

« previous next »
 

Did you know?

Medications that are definitely not safe to take when breastfeeding include radioactive drugs, antimetabolites, some cancer (chemotherapy) agents, bromocriptine, ergotamine, methotrexate, and cyclosporine.

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.

Did you know?

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

Did you know?

There are major differences in the metabolism of morphine and the illegal drug heroin. Morphine mostly produces its CNS effects through m-receptors, and at k- and d-receptors. Heroin has a slight affinity for opiate receptors. Most of its actions are due to metabolism to active metabolites (6-acetylmorphine, morphine, and morphine-6-glucuronide).

Did you know?

Individuals are never “cured” of addictions. Instead, they learn how to manage their disease to lead healthy, balanced lives.

Gate Control Theory, Gate control, Open gate, Closed gate, Pain, Nerve transmission of pain, Pain ma Gate Control Theory, Gate control, Open gate, Closed gate, Pain, Nerve transmission of pain, Pain ma
In the Tai Forest a female chimp demonstrates a skill once thought to be unique to humans. Here she In the Tai Forest a female chimp demonstrates a skill once thought to be unique to humans. Here she
Henry Fox Talbot, The Open Door. Henry Fox Talbot, The Open Door.
Deep transverse friction (i.e., Cyriax friction) on an ankle ligament. Deep transverse friction (i.e., Cyriax friction) on an ankle ligament.
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 ...
Acetylation and deacetylation in open and closed chromatin structure Acetylation and deacetylation in open and closed chromatin structure
Video: Leukemia

For a complete list of videos, visit our video library