My Dream

Endothermic reactions are accompanied by the absorption of heat. The dissolving of ammonium nitrate in water is an example of an endothermic reaction. The solution resulting from this mixture is colder than either the ammonium nitrate or the water. This is the simple explanation of what happens in an instant ice pack. The more detailed information will be discussed in the following paragraphs.

Is this reaction endothermic or exothermic? What does that mean and how do you know? (~3 sentences)

2. How did concentration and/or volume differences affect the heat change (q) for each trial?

Kinetic energy is the energy an object possesses due to its motion. The difference between kinetic energy and potential energy is the kinetic energy is the energy of an object that is already in

To study the nature of ionic reactions, write balanced equations, and write net ionic equations for precipitation reactions.

Are forth step was the basketball to be hit by the tennis ball and fall through a hoop. This step had potential and kinetic energy and force. The tennis ball used the force from the baseball to hit the basketball. The basketball was storing up potential energy while the rest of the machine was running. When the tennis ball hit the basketball the potential energy was released. As the basketball was falling through the hoop it had kinetic energy.

The purpose of this experiment was to investigate the effects of different masses hoisted by an electric motor from ground level to a height of 1.29 m. The main purpose was to look how a change in mass affected the efficiency of our motor, but it did affect other variables such as power, current, force, etc. For this experiment, our hypnosis is that as mass increases, the efficiency increases. Because in the equation for efficiency, efficiency=gain in potential differenceelectrical energy used, gain in potential difference = mgh, the mass of an object has a direct relationship with the efficiency of the motor. In this equation, we see that efficiency is affected by the mass that is lifted, gravity, the height the mass is being lifted, and the amount of energy that is put into the system. We can see that mass, gravity, and height has a direct relationship while inputted power has an inverse relationship with efficiency.

Endothermic and Exothermic reactions release or absorb energy, the graph above shows the way in which the chemical energy changes.

In a lab experiment, a 0.6-g peanut is burned beneath 60 g of water. Heat from the burning peanut raises the water temperature from 22⁰C to 50⁰C in 3.0 minutes. If the heat transfer is 41% efficient, how many Calories of heat did the peanut release while burning? Show all calculations leading to an answer.

Vehicle 3, struck the right rear wheel and quarter panel with the front of the motorcycle. Driver 3 due to impact with Vehicle 1, was ejected from the motorcycle and came to rest on the pavement, near the area of impact. It is unknown what if any, distance, Driver 3 was moved, due to the movement of Vehicle as it continued southward, after the

Then I used the work-energy theorem to calculate the energy lost as heat, the work, as an object traveled a given distance on a sticky surface. Friction was a factor in that part of the problem so I drew a free-body diagram to indicate the net force acting on the object (WA-COMP-2009.SCI.1.1.3.H). Finally, I had to calculate the spring constant using the mechanical energy equation one more time, but replacing the gravitational potential energy equation with the spring potential energy equation to determine the spring constant (WA-COMP-2009.SCI.1.1.3.J). Problem eleven required the use of one simple kinematic equation, after I applied the impulse momentum theorem; once I determined the velocity of a skater, I used it to determine the time it took him to travel a given distance (WA-COMP-2009.SCI.1.1.3). Although I lost points on three multiple choice questions, they are no longer a weakness because I reworked the problems and have become proficient

There are many forms of energy. The types of energy that can affect the toy car are potential energy, kinetic energy, and work of friction. Potential is the energy of an object due to its position. Kinetic energy is the energy due to motion. Friction plays a part because it shows how much energy is needed for the car to move. All these energies are intertwined in the toy car.

To evaluate the possibility that motorcycle-car collisions may occur at higher speeds than car-car collisions, researchers assessed a sample of 109 motorcycle-car head on collisions (that is, the impact speed was the same for the car and the motorcycle) from the same dataset. They found that the motorcyclists involved were 95.4% likely to be injured while the car drivers were 0.9% more likely to be injured. The much higher injury rate confirmed that motorcyclists are more physically vulnerable than those drivers in cars. Overall, the casualty rate (all injury types) is 556 per 100 million vehicle kilometre for two wheeled motor vehicle, compared to 50 for car users in Britain 2002.80

Introduction: The theory behind this experiment is the heat of a reaction (∆E) plus the work (W) done by a reaction is equal to

Purpose: To measure the heats of reaction for three related exothermic reactions and to verify Hess’s Law of Heat Summation.