2 years ago

Question 13 (1 point)

Physics

1 answer:

KonstantinChe [14]2 years ago

3 0

Answer:

Reflective clothing. So vehicles can see them and stuff.

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Where are the life forms of the biosphere located

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<span>The life forms of the biosphere are located within Earth's surface.</span>

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A car accelerates from rest at 3 m/s for 6 seconds. The velocity of the car after 6 seconds is what ?

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$vf = vi + at$
then solve for v

so
$v = a(t)$
so v = (3m/s^2)(6s)

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· List the atomic numbers of the elements in Period 2.

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Answer:

3,4,5,6,7,8,9,10

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Explanation:

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Read 2 more answers

(i). A ball of mass 1.500 kg is attached to the end of a cord 1.50 m long. The ball moves in a horizontal circle. If the cord ca

Aleks04 [339]

(a) Let $v$ be the maximum linear speed with which the ball can move in a circle without breaking the cord. Its centripetal/radial acceleration has magnitude

$a_{\rm rad} = \dfrac{v^2}R$

where $R$ is the radius of the circle.

The tension in the cord is what makes the ball move in its plane. By Newton's second law, the maximum net force on it is

$F = (1.500\,\mathrm{kg}) a_{\rm rad}$

so that

$(1.500\,\mathrm{kg}) \dfrac{v^2}{1.50\,\rm m} = 64.0\,\mathrm N$

Solve for $v$ :

$v^2 = \dfrac{(64.0\,\mathrm N)(1.50\,\mathrm m)}{1.500\,\rm kg} \\\\ \implies \boxed{v = 8.00 \dfrac{\rm m}{\rm s}}$

(b) The net force equation in part (a) leads us to the relation

$F = \dfrac{mv^2}R \implies v = \sqrt{\dfrac{FR}m}$

so that $v$ is directly proportional to the square root of $R$ . As the radius $R$ increases, the maximum linear speed $v$ will also increase, so the cord is less likely to break if we keep up the same speed.

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1 year ago

A driver of a car enters a new 110 km/h speed zone on the highway. The driver begins to accelerate immediately and reaches 110 k

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Answer:

30Km/h

Explanation:

acceleration is the change of speed in a given time so when we substract the accelerations we can know how much the car goes per an hour

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