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kari74 [83]
1 year ago
9

suppose the circumference of a bicycle wheel is 2 meters. if it rotates at 1 revolution per second when you are riding the bicyc

le, then your speed will be group of answer choices 2 m/s. 1 m/s. 3 m/s. 6.28 m/s. 3.14 m/s.
Physics
1 answer:
kirill115 [55]1 year ago
4 0

Then the speed of the rider is, v = 2m/s

The linear velocity of an object in a straight line is its speed.

The following is the relationship between linear and angular velocity:

v = rω

The circumference of the bicycle wheel is,

2\pir = 2

r = 0.318m

The angular velocity of the wheel is,

ω = 1rev/sec = 2\pirad/s

Then the speed of the rider is,

v = rω

v = 0.318×2π

v = 2m/s

Learn more about  angular velocity here:

brainly.com/question/12446100

#SPJ4

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A spacecraft travels at 1.5 X 108 m/s relative to Earth. A process onboard the
kvasek [131]

Answer:

73.6 minutes

Explanation:

relative time = time interval / √(1 - observer velocity² / speed of light²)

we have relative time. we want time interval.

rearrange

time interval = relative time x √(1 - observer velocity² / speed of light²)

convert 85 mins into seconds

85 x 60 = 5100

1.5 x 10⁸ as a number is 150000000

for c = 299 792 458

time interval = 5100 x √(1 - 150 000 000² / 299 792 458²)

for c = 3 x 10⁸

time interval = 5100 x √(1 - 150 000 000² / 300 000 000²)

time interval = 5100 x 0.866

time interval = 4415.71

divide by 60 for back into minutes

time = 73.6 minutes

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2 years ago
Which of these statements is true about endothermic reactions, but not about exothermic reactions?
sashaice [31]
I think the correct answer from the choices listed above is the second option. For endothermic reactions, the reactants have less energy than the products. Which would mean that energy should be added to the reaction for it to proceed. Hope this answers the question.
4 0
3 years ago
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Newton's First Law says that an object at rest will stay at rest, and an object in motion will stay in motion unless:
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Answer: Acted on by equal forces in opposite direction

Explanation:

Newton's First Law says that every body continue in its state of rest or constant speed on a straight line unless being acted upon by an external force.

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It includes earthwork, trenching, wall shafts, tunneling and underground

Explanation:

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hope it helps, please give me brainliest.

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