We had learnt more about James Prescott Joules. He have the "never give up spirit.' We have learn such values from him. He is very strong and never give up. We had a hard time, as we know nothing about them, Thus, this makes our job harder. We surf the internet and found this scientist, James Prescott Joules. We also gained knowledge when research for him.

Inspired us ! (:

Perseverance, determination, resilience, hardworking and patient.

Despite of the fact that he had spinal disorder, he never gave up.
Despite of the fact that he met many setbacks during the experiments, he overcome the setbacks and continue to experiment.
He overcome with all the problems and finally he accomplish his dream.
When his father was ill, he work at the brewery and studied at the same time. This shows that he is very keen to study and thus he is hardworking.
Many British scientists were hesitant to accept his work, but Joule patiently persisted.

Contributions (:

Joule had the idea that he could use the electric motor to convert the family brewery from steam power to electric power. As a course of his experiments he decided that it would be too expensive to do this, as the work done by the motor did not come out very highly when the cost of the zinc used in the batteries that powered it was taken into consideration. It was still cheaper to produce the steam power by burning coal. James Joule was very painstaking and paid great attention to detail. He spent a great deal of his life in determining the mechanical equivalent of heat, inspired from his belief that heat was derived from work. William Thompson (later to be Lord Kelvin) worked with Joule between 1852 and 1862 on experiments which led to the discovery known as the Joule-Kelvin cooling effect.

Joule began a series of experiments involving mechanical work, electricity and heat. He sent a paper entitled “On the Production of Heat by Voltaic Electricity.”

In this paper, he showed that the amount of heat produced per second in a wire carrying an electric current equals the current (I) squared multiplied by the resistance (R) of the wire. The heat produced is the electric power lost (P). (That is, P=I²R.) This relationship is known as Joule’s Law. Joule's Law, it states that heat is produced in an electrical conductor. In the experiments behind this law, he had simply placed coils of different kinds of metal in jars of water and measured the change in temperature. Joule published the results of further experiments on the production of heat by friction in the Royal Society’s Philosophical Transactions in 1850 and gave the most accurate determination of the constant yet.

Joule-Thomson effect, whereby an expanding gas is cooled as work is done to separate the molecules. Joule was patient and ingenious in his experiments. These attributes greatly assisted him in avoiding errors and in obtaining results far more accurate than those of previous experimenters. 

JAMES PRESCOTT JOULES

James Prescott Joule was born on 24th December 1818 in Salford, Lancashire, England. He was the second of five children born to a wealthy brewery owner. James was shy and weak and he suffered from spinal disorder.. Because of these limitations, he preferred studies to physical activity. Although his spinal problem later improved, it affected him throughout his life. He was initially educated at home then, at the age of 16, began to study under John Dalton, the eminent Manchester scientist. He was taught chemistry, physics and mathematics. He only received some instruction from John Dalton in chemistry, most of his scientific knowledge was self-taught. James and his brother took over running the brewery, when their father became ill. Due to this, James did not have the opportunity to attend university. However, his great desire was to continue to study science, so he set up a laboratory in his home and began experimenting before and after work each day. James saw this desire to study science as a natural consequence of his Christian faith. Joule is best known for his research in electricity and thermodynamics.