How much energy, in joules, is released when 17 kilograms of granite is cooled from 45°C to 21°C?

Answers

Answer 1
Answer: Energy or heat can be calculated in terms of the mass, temperature, and specific heat of a substance. This is given by the equation:

U = mCpΔT = mCp(Tf-Ti)

where:
m = mass
Cp = specific heat
ΔT = temperature difference

For this problem, you need to get the specific heat of granite which can be found in reliable chemistry/engineering books or websites. According to Engineering Toolbox website, the Cp of granite is 790 J/(kg-°C).

U = 17 kg (790 J/(kg-°C)) (21-45) = - 322,320 Joules

*Note: the sign is negative because energy was released

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What is the temperature of a gas in which the atoms are moving very very slowly?

Answers

Cold.
Example: A frozen object (such as ice) is solid. Its molecules move extremely slow because the object itself isn't moving... It's like the skin on your bod... Imagine that wiggling and writhing on your bones. It's not like a gas, that can move freely and has no specific form or hold.
So again, the answer is Cold. 

What is the approximate period of this wave?15 centimeters
15 seconds
10 seconds
5 seconds

Answers

Answer: 10 seconds

A period is the time needed to complete one cycle. Period can be obtained by dividing the total time over the total number of waves.

T (period) = 60 secs / 6 waves

T = 10 secs 

What distinguishes a tornado watch from a tornado warning?

Answers

"Watch" . . . atmospheric conditions exist that could
produce tornados, but none have been seen yet.

"Warning" . . . tornados have formed and have been seen.

After tasting the salt in the ocean water on a visit to the beach one day, you recall from class that the salt is the __________ in the ocean water. A. solid
B. solute
C. solution
D. solvent

Answers

Solid is a stateof matter having no space in a volume, made entirely of compact material.
Solute is adissolved substance is a dissolved substance in a solution.Solution is theone that dissolves the solute.
Solvent is theone that dissolves either a solution or solute.
Based on thedefinitions, the answer is letter B. solute. 

Answer:

B. Solute

Explanation:

I've taken this on USATestPrep

4. Two cars are travelling along a straight road, as shown below. The pass each other at pointB and then continue in opposite directions. The red car travels for 0.25 hours from point B
to point C at a constant velocity of 32 km/hr east. The blue car travels for 0.25 hours from
points B to point D at a constant velocity of 48 km/hr. How far has each car traveled from
point B? What is the position of each car relative to the origin, point A?

Answers

Using the speed - time relation, the distance moved by the cars from point B are 8 kilometers and 12 kilometers respectively.

Distance of car 1from Point B :

  • Speed of car × time traveled from point B

Distance traveled from point B = 32 × 0.25 = 8km

Distance of car 2from Point B :

  • Speed of car × time traveled from point B

Distance traveled from point B = 48 × 0.25 = 12km

The diagram isn't attached, hence question 2 cannot be answered accurately.

Therefore, the distance traveled from point B by car 1 and 2 is 8km and 12 km respectively.

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Final answer:

The red car has traveled 8 km east of point B, while the blue car has traveled 12 km west of point B.

Explanation:

To determine how far each car has traveled, we need to use the formula: distance = speed × time. The red car travels for 0.25 hours at a constant velocity of 32 km/hr, so the distance it travels is: distance = 32 km/hr × 0.25 hr = 8 km. The blue car travels for the same amount of time at a constant velocity of 48 km/hr, so the distance it travels is: distance = 48 km/hr × 0.25 hr = 12 km.

The position of each car relative to the origin, point A, is as follows: The red car is 8 km east of point A (since its velocity is in the east direction). The blue car is 12 km west of point A (since its velocity is in the opposite direction to the east).

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The "Tragedy of the Commons" describes the conflict between a. Developing and developed nations. b. Individuals and society. c. Farmers and industrialized society. d. Canada and Mexico.

Answers

Final answer:

The 'Tragedy of the Commons' describes the conflict between individual interests and the well-being of the society, resulting in the overuse or depletion of shared resources to everyone's detriment.

Explanation:

The 'Tragedy of the Commons' is a concept that was popularised by ecologist Garrett Hardin to describe a predicament where individual interests and the well-being of society are in conflict. In this scenario, 'common' resources are shared by a group of individuals. Each individual, driven by self-interest, tends to overuse or deplete these resources, leading to overall degradation, despite its disadvantage to the group as a whole. Hence from the options, the correct one would be b. Individuals and society.

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Final answer:

The 'Tragedy of the Commons' illustrates the conflict between individuals and society, where individual self-interests can lead to the depletion of a shared resource, to the detriment of society as a whole.

Explanation:

The 'Tragedy of the Commons' is a concept in social science that describes a dilemma where individuals, acting independently and rationally according to their own self-interest, behave contrary to the best interests of the whole group by depleting some common resource. Essentially, it reflects a conflict between individuals and society.

So the correct answer to your question would be b. individuals and society. This concept is often used in discussions about the environment where individuals deplete or harm the environment (the 'commons') for personal gain, to the detriment of society as a whole.

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