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2 years ago

Simon can climb up the balcony (5.11 m) in 4.2 seconds. What is Simon’s power?

Physics

1 answer:

dedylja [7]2 years ago

3 0

Answer:

77.3W (to 3sf)

Explanation:

weight = mass × gravtaional field strength

= 6.35kg × 10N/kg

= 63.5N

weight = force = 63.5N

work done = force × distance

= 63.5N × 5.11m

= 324.485J

power = $\frac{work done}{elapsed time}$

= $\frac{324.485J}{4.2s}$

= 77.3W (to 3sf)

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serious [3.7K]

Work Done = Force x distance
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3 years ago

A sample of helium gas has a volume of 900. milliliters and a pressure of 2.50 atm at 298 K. What is the new pressure when the t

Sladkaya [172]

Answer:

The new pressure = 5.64 atm.

Explanation:

Using The general gas equation,

P₁V₁/T₁ = P₂V₂/T₂..................... Equation 1

making P₂ the subject of the equation

P₂ = P₁V₁T₂/V₂T₁ ...................... Equation 2

Where P₁ = initial pressure, V₁ = initial Volume, T₁ = Initial temperature, P₂ = final pressure, V₂ = final volume, T₂ = final Temperature.

Given: P ₁= 2.5 atm, T₁ = 298 K, V₁= 900 milliliters, T ₂= 336 K, V₂ = 450 milliliters

Substituting these values into equation 2,

P₂ = (2.5×900×336)/(298×450)

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P₂ = 5.64 atm.

Thus the new pressure = 5.64 atm.

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2 years ago

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romanna [79]

Ideal gas law:

PV = nRT

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2nd law of thermodynamics:

A set of governing principles that restrict the direction of net heat flow (always hot to cold, heat engines are never 100% efficient, entropy always tends to increase, etc)

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your question: 

What are the two types of physical fitness?

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2 years ago

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