3 years ago

1- an example on a body that it is in motion to an observer and at rest to another.

Physics

1 answer:

vesna_86 [32]3 years ago

6 0

Answer:

Explanation:

On a train you are sitting so not in motion but to someone outside the train you are in motion with the train

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A dog walks along The ground. If the dog applies an action force on the ground, what is the reaction force?

fiasKO [112]

Explanation:

Action and reaction are two forces that are equal in magnitude but the direction is opposite.

When a dog walks along the ground, the action force is the force that dog applies on the ground. On the other hand, the reaction force is the force that the ground applies on the dog. It is based on Newton's third law of motion.

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3 years ago

The aorta is the main artery from the heart. a typical aorta has an inside diameter of 1.8 cm and carries blood at speeds of up

defon

Answer:

Explanation:

Volume per unit time flowing will be conserved

a₁v₁ = a₂ v₂

π r₁² x v₁ = π r₂² x v₂

(0.9 x 10⁻²)² x .35 = ( .45 x 10⁻² )² x v₂

v₂ = 1.4 m / s

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3 years ago

A charging RC circuit controls the intermittent windshield wipers in a car. The emf is 12.0 V. The wipers are triggered when the

lilavasa [31]

Answer:

$R=803k\Omega$

Explanation:

We have the following information,

$V_0 = 12V\\V=10V\\c= 1.25*10^{-6}F\\t=1.8s$

We apply the equation for capacitor charging the voltage across it,

$V=V_0 (1-e^{-t/x})\\e^{-t/x}=1-(\frac{V}{V_0})\\-\frac{t}{Rc}=ln(\frac{V}{V_0})\\R=-\frac{t}{ln(\frac{V}{V_0})*c}$

Replacing values,

$R=-\frac{1.8}{ln(10/12)*1.25*10^{-6}}$

$R=803k\Omega$

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3 years ago

Marissa researched the cost to have custom T-shirts printed by several local and online vendors. She found that each store’s cha

myrzilka [38]

I’m slightly confused about the wording of the question but if both the same y-intercept that means both company’s have the same flat rate charge for artwork.

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3 years ago

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A student sits at rest on a piano stool that can rotate without friction. the moment of inertia of the student-stool system is 4

stich3 [128]

<span>As we Know Ď‰=v/r I2 = m*RÂ˛ = 1.5*0.35Â˛ = 0.18375 kgâ™mÂ˛ I = Is + I2 = 4.28375 kgâ™mÂ˛ w = L/I = (v*R*m)/I = (2.8*0.35*1.5)/4.28375 = 0.343 rad/sec So the answer is 0.343 rd/sec</span>

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4 years ago