Heat is the kinetic energy of molecules, which means that temperature and kinetic energy have a direct relationship. The textbook uses the example of rubbing one's hands together to produce heat as an example of how friction, which converts the work done by the hands on each other into heat, causes molecules to oscillate and travel at higher rates of speed. Since, as mentioned before, heat is defined as the kinetic energy of molecules, it will be higher when the molecules are traveling faster. This can be visualized using the kinetic energy formula, K.E.=1/2 mv^2. Given a 2 kilogram sample of a substance moving at 1 m/s it can be calculated that 1/2(2)(1)^2=1 Joules. If the same substance's velocity is raised to 2 m/s the equation becomes 1/2(2)(2)^2 …show more content…
The most visual reasons is that higher atmospheric temperatures mean that the Earth's glaciers and polar ice caps will begin to melt causing a greater amount of water to flood into the world's oceans. However, less conspicuous is the fact that water expands with heat. Since the volume expansion of water is 2 x 10^-4 per degree, it would not require a colossal change in temperature to cause a major change in the Earth's landscape, especially considering the amount of water present in the world's oceans and other bodies of water. Heat also played a role in the destruction of the levees in New Orleans during Hurricane Katrina because of a design flaw that was deemed necessary due to thermal expansion. As a result, sliding joints must be factored into the design of the levee because solid concrete would crack and sacrifice the integrity of the structure. However, the material and design of the expansion joints used in the New Orleans levees were far weaker than the reinforced concrete employed by the rest of the structure, and they failed under the pressured caused by the hurricane. On the other hand, the space shuttle Columbia disaster was the result of hot atmospheric molecules entering the spacecraft through damage to the heat resistant tiles that comprise the ship. Since the exceedingly high hypersonic speeds reached by the shuttle during reentry causes the surrounding molecules to heat up with great intensity, the damage to the heat resistant tile proved fatal for the craft. As a result, the heat produced by the kinetic energy of motion caused the vehicle to burst into
In the essay, “Global Warming is Eroding Glacial Ice,” Andrew C. Revkin argues that global warming is the primary cause for many of the world’s natural disasters; including flash floods, climate change, and the melting of the polar ice caps. He includes multiple accounts of expert testimony as well as a multitude amount of facts and statistics to support his theory that global warming is a threat to the world. However, in the essay “Cold Comfort for ‘Global Warming’,” Phillip Stott makes the complete opposite argument. He argues that global warming is nothing to be worried about and the melting of the polar icecaps is caused by the interglacial period we are currently in. After reading both of these essays and doing extensive research on both viewpoints, I completely agree with Revkin that global warming is an enormous threat to our world today. My research not only helped me to take a stand but it also showed me the invalidity in Stott’s essay.
The heat makes the molecules in the mixture expand and move slower than when they are in colder temperatures (source 1). The molecules are like people when it comes to how they react to heat and coldness. When the molecules are cold, they like to be very close to one another and the molecules move fast because they are “shivering” (source 2).This is just a one of many examples and comparisons that I am going make throughout this paper. Some of the examples will be very cheesy. I am going to give a warning. When the molecules are hot, they like to be far apart from one another (source 1). They even might start to sweat like humans, too. The molecules have some energy too, but the molecules just do not have as much energy when they are hot. They like to be lazy like many humans do in hot weather (source 1).
When there is a heat exchange between two objects, the object’s temperature will change. The rate at which this change will occur happens according to Newton’s Law of heating and cooling. This law states the rate of temperature change is directly proportional between the two objects. The data in this lab will exhibit that an object will stay in a state of temperature equilibrium, unless the object comes in contact with another object of a different temperature. Newton’s Law of Heat and Cooling can be understood by using this formula:
People are responsible for higher carbon dioxide atmosphere emissions, while the Earth is now into the Little Ice Age, or just behind it. These factors together cause many years discussions of the main sources of climate changes and the temperature increasing as a result of human been or natural changes and its consequences; even if its lead to the global warming, or to the Earth’s cooling. In their articles, “Global Warming Is Eroding Glacial Ice” by Andrew C. Revkin and “Global Warming Is Not a Threat to Polar Ice” by Philip Stott, both authors discuss these two theories (Revkin 340; Stott 344). Revkin is right that global warming is taking place. Significant increase of carbon dioxide in the atmosphere is due to human activities combined with natural factors such as volcanic emissions and solar radiation – all together they lead to climate changes and temperatures rising. At the same time, other factors such as deforestation contribute to environmental changes for some glaciers not less than air pollution. However, during global warming not all regions of the planet are affected in the same way, local warming and cooling are both possible during these changes.
The Arctic Tundra The Tundra is located in the northern regions of North America, Europe, Asia, and Africa. as well as a few regions of Antarctica. The Tundra is the second largest vegetation. zone in Canada. It can be divided into three different sections: the High Arctic Tundra, the Low Arctic Tundra and the Alpine Tundra.
Glaciers are one of the most fundamental phenomenon on the planet, and much of their purpose and impact on earth has been well documented and published. Ice sheets, Ice Caps and Glaciers trap nearly 90% of the world's fresh water, and are replenished by snowfall each year. Their existence on this planet dates back 650,000,000 years and yet they are always moving, always shifting and always melting. Before, human existence and even during the brief era of humans, ice dominated all of the earth's landmass and have regulated, created and altered many of the landscapes around the world.
Chasing Ice is a documentary on climate change, the rise of CO2 gases and seeing what effect these two factors have on glaciers. Climate change is a incredibly serious problem because it kills off special species that the world needs in which humans are causing this problem. A photographer decided he wanted to try and capture life’s changing images of many glaciers to determine what effect climate change truly had on the world. He traveled to Greenland, Alaska, Montana, and Iceland and sets up cameras to grasp what effect climate change had on these glaciers. In a six month period, James, the photographer, captured that glaciers were not just shifting a couple of feet, however they were moving miles and miles from the current location. Climate
The increased temperature created by climate change will affect the surface temperature of the oceans, thus creating changes in the atmospheric water content. This change is what will increase the rate of water-based natural disasters (Friederike, 2015). Since Haiti is an island nation, it is extremely vulnerable to natural disasters like hurricanes and earthquakes.
Approximately 98% of Antarctica is covered by a sheet of ice. This large mass makes up 90% of the ice in the entire world. Additionally, we get more than half of our fresh water supply from the continent alone. If all of this ice would melt, sea levels would rise at an alarming 200 feet.
A cold desolate landscape is sprawling out in front of you, the wind is whipping over the ice at speeds up to 200 miles per hour. The thermometer is showing you its well below zero on the Fahrenheit scale. Mountains can me seen in the far distance breaking the horizon, the only thing beside flat fields of ice that changes this sterile landscape for miles. Who have ventured here in the past you begin to wonder, why would they have some to such location with nothing seemingly to offer. You become aware of a chill creeping into your body and realize its well past the time to get indoors, you turn and head for your base camp in the world’s second largest country Antarctica.
PREMISE: Antarctica never glaciates (or at least never glaciates completely) leaving a relatively warm, habitable continent with a functioning ecosystem. Essentially, Antarctica remains more or less the live continent that it was 20 million or so years ago. Despite being a live continent, Antarctica remains isolated by distance and the circumpolar currents. Even without glaciation, six month nights and six month days, and various local conditions make this the strangest, most exotic place on earth.
Kinetic energy is a measure of how fast molecules are moving at any given moment. Kinetic energy can be affected by temperature change, as can many other parts of a reaction are. The higher the temperature is, the higher the kinetic energy becomes. An increase in kinetic energy can affect the speed of a reaction that is taking place by increasing the speed of the molecules movement. Kinetic energy is also changed by the air pressure, which temperature can also affect; the higher the pressure and temperature are, the higher the kinetic energy and therefore the faster the reaction happens. Kinetic energy can also affect temperature; when kinetic energy increases so does temperature. This happens because chemical reactions can either be endothermic or exothermic. When a reaction is endothermic, kinetic energy becomes potential energy, meaning heat is absorbed and that temperature has an effect on kinetic energy. On the other hand, when a reac...
We had the students rub their hands together and they noticed that their hands got warmer. One student said their hands got warmer because there was no room for cold air to go through them because they were together. The girl explained that when you hold your hands out to your side there is room for cold air to go through them and then when they are together, there is no room for the air to go through. Another student said that your hands get warmer because they are rubbing against each other. The students then figured out in a group that the faster they rubbed their hands together, the warmer they got. The answer to this question was on video 7 at 43 seconds to 55 seconds and at 1 minute 55 seconds to 2 minutes 13 seconds.
Heat is thermal energy being transferred from one place to another, because of temperature changes. This can take place by three processes. These three processes are known as conduction, convection, and radiation.
Polar bears prefer to live in extremely cold artic climates. They live only in the Northern Hemisphere, on the arctic ice cap, and they spend most of their time on coastal areas. Polar bears are widely spread in Canada, extending from the northern arctic islands south to the Hudson Bay area. They are also found in Greenland, on islands off the shore of Norway, on the northern coast of the former Soviet Union, and on the northern and northwestern coasts of Alaska in the United States.