Question and answer
Question not found
Ask a question
Not a good answer? Get an answer now. (Free)
New answers
Rating

There are no new answers.

Comments

There are no comments.

Add an answer or comment
Log in or sign up first.
Questions asked by the same visitor
a car increases its speed from 80 to 90 km/h in 2 seconds. what is its acceleration? can a bicycle have the same acceleration? how? User: how can friction be reduced?
Weegy: Friction can be increased by using a rougher, or coarser, material. Sand paper is one example. Friction can be reduced by using a smoother material, this can be silk, or very very finely milled metal. [ Additionally, lubricants like oil can be used, the oil gets between where two materials make contact and effectively fills in the gaps to make rough surfaces become smoother, and allow them to slide past each other more easily. ] (More)
Question
Expert Answered
Asked 12/12/2012 4:53:05 AM
0 Answers/Comments
a car increases its speed from 80 to 90 km/h in 2 seconds. what is its acceleration? can a bicycle have the same acceleration? how? User: cite cases where friction is (a) disadvantages and (b) needed. How can friction be reduced?
Weegy: a1) In a car engine, the parts rub against each other - pistons rub in the cylinders, the crankshaft rubs against its bearings, etc, etc. Sme thing in the transmission. [ The friction between those parts means that you have to apply some force to get the engine and transmission to turn. That means that some of the power of the engine is used to overcome friction instead of actually moving the car - so you use more fuel, which costs you money and releases more pollutants and global warming gases into the atmosphere. It also creates wear on the parts, which will eventually break. In the case of your pistons in the cylinders, wear will result in a bad seal, which means loss of power, and even more wasted fuel. b1) But at the tires, friction is a good thing! The engine turns the wheels, but the thing that gets the car moving forward is the force on the ground applied by the tires. The force that can be applied is related to the friction between the tires and the ground. If you've ever stomped on the gas on a rainy day, you might have noticed that your tires started spinning without actually moving the car, because the layer of water reduces the friction between the tire and the road. The same goes for breaking - the brakes stop the wheels from spinning (as a matter of fact, they use friction to do that, too!), and friction between the tires and the road stops the car. If you try to stop on ice, there might not be enough friction, and you can lose control of your car. a2) If you've ever hung around runners, especially long distance runners, you might have heard them talk about putting band aids over their nipples. That's because as they run, their shirts move across the skin of their chest, and there's friction between the cloth and the skin. ] (More)
Question
Expert Answered
Asked 12/12/2012 4:50:17 AM
0 Answers/Comments
18,044,747 questions answered
Popular Conversations
Which type of verb can have a direct object? A. linking B. action ...
Weegy: Singapore will host RoboCup 2010. Verb : Host B. action BEST identifies the underlined verb. User: What is ...
10/29/2014 2:23:45 PM| 4 Answers
What is the product of 3 2/3 and 14 2/5? A. 52 4/5 B. 54 C. 42 ...
Weegy: B. 15/22 represents a proper fraction. User: 9/11 = /22 A. 4 B. 12 C. 18 D. 9 Weegy: 18/22 User: A ...
10/29/2014 10:31:27 AM| 3 Answers
Is the underlined clause independent or subordinate? When a hedgehog ...
Weegy: What is the underlined word of the sentence?
10/29/2014 10:36:46 AM| 3 Answers
What is the equation of a circle whose center is at the origin and ...
Weegy: the center is (1, 2) User: What is the length of the hypotenuse of a right triangle whose legs have lengths ...
10/29/2014 10:44:20 AM| 3 Answers
Factor 5k 2 - 35k 3.
Weegy: (a)5k^2(1 - 7k) is the answer. 5k^2(1 - 7k) = 5k^2 - 35k^3 User: Factor x 4 y 2 + x 3 y 3. Weegy: x+y=k is ...
10/29/2014 3:11:48 PM| 3 Answers
Factor n 3 - n 2 + 3n - 3.
Weegy: 5 = 3N - 1 N = 2 User: Factor z 3 - 2z 2 + 9z - 18. Weegy: (z - 12)(z + 12) = z^2 + 12z - 12z - 144; = ...
10/29/2014 3:20:43 PM| 3 Answers
when a financial institution is a mutual association, it means it is ...
Weegy: When a financial institution is a mutual association, it means it is owned by the management. User: Credit ...
10/29/2014 9:12:43 PM| 3 Answers
Factor x 2 + 29x - 30.
Weegy: The answer for x^2 + 29x - 30 is (x-1) (x+30) User: What is the product of (n - 8)(n + 2)? Weegy: (a + 3)(a - ...
10/29/2014 9:33:53 PM| 3 Answers
Which sentence correctly uses an objective case pronoun? A. Did her ...
Weegy: The sentence correctly using an objective case pronoun is: D. The founders of the company are Mike, me, and ...
10/29/2014 9:14:58 AM| 2 Answers
Translate the word phrase into a variable expression. The ...
Weegy: Four more than a number is 12.is translated into: x + 4 = 12 User: Which equation matches the ...
10/29/2014 9:26:49 AM| 2 Answers
Weegy Stuff
S
L
1
1
1
1
L
1
L
Points 3165 [Total 15540]| Ratings 0| Comments 3165| Invitations 0|Offline
S
L
1
L
P
C
1
P
C
1
L
Points 2070 [Total 11551]| Ratings 5| Comments 2020| Invitations 0|Offline
S
1
L
1
L
P
P
L
Points 1082 [Total 13311]| Ratings 1| Comments 1072| Invitations 0|Offline
S
L
Points 824 [Total 2223]| Ratings 0| Comments 824| Invitations 0|Offline
S
Points 625 [Total 626]| Ratings 7| Comments 555| Invitations 0|Online
S
1
L
L
Points 551 [Total 6345]| Ratings 3| Comments 521| Invitations 0|Offline
S
Points 482 [Total 482]| Ratings 0| Comments 452| Invitations 3|Offline
S
Points 434 [Total 434]| Ratings 1| Comments 424| Invitations 0|Offline
S
L
Points 79 [Total 1296]| Ratings 1| Comments 69| Invitations 0|Online
S
1
Points 63 [Total 681]| Ratings 0| Comments 63| Invitations 0|Online
Home | Contact | Blog | About | Terms | Privacy | Social | ©2014 Purple Inc.