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2 years ago

1. A crane lifts a 75kg mass a height of 8 m. Calculate the gravitational potential energy

Chemistry

1 answer:

koban [17]2 years ago

6 0

Answer:

GP.E = 5880 j

Explanation:

Given data:

Mass = 75 kg

height = 8 m

Potential energy = ?

Solution:

The formula for gravitational potential energy is

GPE = mgh

m = mass in kilogram

g = acceleration due to gravity

h = height in meter above the ground

Formula:

GP.E = mgh

Now we will put the values in formula.

g = 9.8 m/s²

GP.E = 75 Kg × 9.8 m/s²× 8 m

GP.E = 5880 Kg.m²/s²

Kg.m²/s² = j

GP.E = 5880 j

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Problem One

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Givens

m = 12.4 grams

c = 0.1291

t1 = 26oC

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H = m * c * deltaT + m * H_f

Solution

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H = 1660.1 + 787.4

H = 2447.5 or 2447.47 is the exact answer. I have to leave the rounding to you. I have no idea where to round it although I suspect 2450 would be right for 3 sig digs.

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Formula and Givens

t1 = 14.5

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Solution

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m = 38.2 to 3 sig digs.

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2 years ago

Read 2 more answers

Respirometers were set up that contained yeast and 2% glucose solution. Each respirometer was placed at a different temperature.

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2 years ago

Freon-11, CCl3F has been commonly used in air conditioners. It has a molar mass of 137.35 g/mol and its enthalpy of vaporization

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2 years ago