sending signals to muscles, causing them to contract, or to glands, causing. them to produce secretions. Neurons, or nerve cells, carry out the functions of the nervous system by. conducting nerve impulses.
Best Answer: Specific Heat is the energy required to raise EACH gram of a material by 1C. This is expressed in J/gC. The temperature change is 82.1C - 30.7C = 51.4C. The Aluminum weighs, not 1g, but 625g. m x c x Î´T = Q 29.5g x 0.45J/g/Â°C x (40 - 25Â°C) Î´T = 199.125 Joules (= 0.199kJ) of heat absorbed. (you can say 0.200kJ) If 8.4kJ was used as in your initial statement, to raise the temp. by 5Â°C, the mass of iron must have been much greater than 29.5g. or, 8.4kJ is an error. 29.5 x 0.45 x 5 = 66.4 kJ.
The temperature change caused by depositing a given amount of thermal energy. in an object depends not only on the objectâs mass, but also on what it is made of. Raising the temperature of a kilogram of water by one degree Celsius requires 4200. joules, but for a kilogram of wood, only about 1700 joules are required. For iron the. value is only 450 joules, while for lead, a mere 130 joules will suï¬ce to accomplish. the same one-degree temperature increase (per kilogram).