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Sindrei [870]
3 years ago
5

PLEASE HELP!!!

Chemistry
2 answers:
Veseljchak [2.6K]3 years ago
7 0

Answer is: C) There is no air between the two flasks.

Heat in this example can transfer throw thermal conduction.

Because there are no mo molecules to transfer heat, there is no conduction.

Thermal conduction is the transfer of heat through physical contact. Thermal conduction is the transfer of heat by microscopic collisions of particles. Heat spontaneously flows from a hotter to a colder body.

The process of heat conduction depends on four basic factors: the temperature gradient, the cross section of the materials involved, their path length and the properties of those materials.

Because there are no mo molecules to transfer heat, there is no conduction.

Sunny_sXe [5.5K]3 years ago
5 0
C. Heat could easily travel through the molecules in the air and escape/enter the flask. Removing the air slows down the heat transfer. 
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<em>Answer:</em>

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<em> </em>

<em>Kinetic energy is directly proportional to the mass of the object and to the square of its velocity: K.E. = 1/2 m v2. If the mass has units of kilograms and the velocity of meters per second, the kinetic energy has units of kilograms-meters squared per second squared. Kinetic energy is usually measured in units of Joules (J); one Joule is equal to 1 kg m2 / s2. </em>

<em> </em>

<em> Calculate the kinetic energy in Joules possessed by each of the following objects. Remember to use the correct number of significant figures in your answer. </em>

<em> </em>

<em>A. A 500 g wooden block moving at 2 m/s.  </em>

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<em>B. A 71 kg man walking at 1.0 m/s.  </em>

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<em>C. A 71 kg man running at 5.0 m/s.  </em>

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<em>D. A 1816 kg car (2 tons) travelling at 26.8 m/s (60 mph).  </em>

<em>J  </em>

<em> </em>

<em>Potential energy  is energy an object has because of its position relative to some other object. When you stand at the top of a stairwell you have more potential energy than when you are at the bottom, because the earth can pull you down through the force of gravity, doing work in the process. When you are holding two magnets apart they have more potential energy than when they are close together. If you let them go, they will move toward each other, doing work in the process. </em>

<em> </em>

<em>The formula for potential energy depends on the force acting on the two objects. For the gravitational force the formula is P.E. = mgh, where m is the mass in kilograms, g is the acceleration due to gravity (9.8 m / s2 at the surface of the earth) and h is the height in meters. Notice that gravitational potential energy has the same units as kinetic energy, kg m2 / s2. In fact, all energy has the same units, kg m2 / s2, and is measured using the unit Joule (J).</em>

<em>Explanation:</em>

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