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3 years ago

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A 0.111 kg hockey puck moving at 55 m/s is caught by a 80 kg goalie at rest. With what speed does the goalie slide on the (frict

ionless) ice? a 3.78 m/s b 2 m/s C 0.076 m/s d 1.056 m/s

1 answer:

Andrews [41]3 years ago

6 0

Answer: 0.076 m/s

Explanation:

Momentum is conserved:

m v = (m + M) V

(0.111 kg) (55 m/s) = (0.111 kg + 80. kg) V

V = 0.076 m/s

After catching the puck, the goalie slides at 0.076 m/s.

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he magnetic flux through a loop of wire decreases from 1.7 Wb to 0.3 Wb in a time of 0.4 s. What was the average value of the in

Pani-rosa [81]

Answer:

Induced emf through a loop of wire is 3.5 V.

Explanation:

It is given that,

Initial magnetic flux, $\phi_i=1.7\ Wb$

Final magnetic flux, $\phi_f=0.3\ Wb$

The magnetic flux through a loop of wire decreases in a time of 0.4 s, t = 0.4 s

We need to find the average value of the induced emf. It is equivalent to the rate of change of magnetic flux i.e.

$\epsilon=-\dfrac{\phi_f-\phi_i}{t}$

$\epsilon=-\dfrac{0.3\ Wb-1.7\ Wb}{0.4\ s}$

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So, the value of the induced emf through a loop of wire is 3.5 V.

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3 years ago

A sample of a gas has a volume of 52 l at a pressure of 1.2 atm. what volume will the gas occupy if the pressure is changed to 0

Shtirlitz [24]

<h2>Equation of state of an ideal gas</h2>

<em>The </em><em>ideal gas law is derived</em><em> from the ga</em><em>s laws of Boyle, Charles, Gay Lussac and General.</em>

To solve this exercise, we obtain the data of the exercise:

V₁ = 52 Lt
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V₂ = ¿?

<em>The general formula of the </em><em>Equations of state of an ideal gas is:</em>

<h3>P₁V₁=P₂V₂, Where</h3>

P₁ = Initial pressure
V₁ = Initial volume
P₂ = End Pressure
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We clear the formula, since it is the value that we must calculate.

<h3>V₂ = P₁V₁ / P₂</h3>

To solve, we substitute our data in the formula; and we solve

<h3>V₂ = (1,2 atm)·(52 Lt) / 0.75 atm</h3><h3>V₂ = 0.832 Lt</h3>

Answer:<em> The </em><em>volume that the gas will occupy</em><em> if the pressure increases to 0.75 atm is </em><em>0.832 lt.</em>

<h2>See more about this at:</h2><h3>brainly.com/question/15907283</h3>

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2 years ago

How are hypotheses and theories related to each other?

GREYUIT [131]

Hypotheses and theories related to each other since hypotheses are used in creating a theory. Hypotheses are explanations for some phenomenon that are still proposed. When these are validated and proved, they are accepted by the public as theories and are used to explain natural phenomenon.

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3 years ago

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Luden [163]

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A 45-gram object that has a volume of 9 mL has a density of

yanalaym [24]

Answer:

<h2> The answer is </h2><h2>a. 5g/mL</h2>

Explanation:

Given data

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substituting our given data we have

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What is Density?

The Density of a body can be defined as the ratio of mass to volume,

or

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where d is density,

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Density is commonly expressed in units of grams per cubic centimetre.

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3 years ago