Where does friction oppose motion in a roller coaster car

1 answer:

7 0

In roller coasters, friction is a force that opposes motion and significantly slows the cars as they move on the track. While it is easy to believe that friction is bad for the ride, it is one of the forces engineers consider in ensuring passengers have a safe ride

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elaborate on the difference between a chemical change and a physical change. a) a physical change is irreversible where as a che

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I think the correct answer from the choices listed above is option D. The difference between a chemical change and a physical change is lies in the fact that a physical change does not break any bonds while a chemical change does form new substances. Hope this answers the question.

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4 years ago

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Draw a circuit that uses the resistors listed below as well as a 12V battery source. For your circuit, determine (a) the total r

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Answer: hello your questions lacks the required resistor values therefore i will provide a general answer using an example

answer : a) 14 ohms b) 0.86 amps c) 10.32 V

Explanation:

Assuming the resistors are : 3 ohms , 4 ohms and 5 ohms

Voltage source = 12V

Assuming that the Resistors are in series 

a) Determine Total resistance

Req = R1 + R2 + R3

= 3 + 4 + 5 = 14 ohms

b) Total current

Ieq = V / Req

= 12 / 14 = 0.86 amps

c) The Total Voltage over the entire system

Vt = ∑ Voltage drops

= ( 0.86 * 3 ) + ( 0.86 * 4 ) + ( 0.86 * 5 )

= 10.32 V

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3 years ago

What is the key point from the kennedy-nixon debate

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Answer:

The key point was that Kennedy challenged Nixon to a series of televised debates. It was the first televised presidential debate in American history.

In 1960, 88 % of American homes had television. About 2/3 of the electorate watched the first debate on TV. Nixon was recovering from a knee injury, he looked drained. Kennedy, meanwhile, had been resting in a hotel for an entire weekend, he looked tan and confident.

Most Americans watching the debates voted for Kennedy, most radio listeners seemed to give the edge to Nixon. hope this helps

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3 years ago

How many valence electrons does each atom of arsenic (As) have? Arsenic is element 33. It is in period 4 and family 15 (5A or th

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Answer:

It have 5 valence electrons

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