<span>The usual answer (and correct) is to improve on the insulation, for example by covering the calorimeter, and using two cups, one inside the other.
Further improvements can be made
1) carrying out the experiment over as short a period of time as possible. reason; any calorimeter will loose heat, but the shorter the time allowed, the less heat will be lost.
2) Use a larger calorimeter, with greater volume of solution. reason; the greater the solvent mass requires more energy to obtain the same change in temperature. You get a smaller temp change for the same reaction, so less losses to the surroundings.
3) calibrate your calorimeter heat the same volume of pure water to a similar temperature as that which the reaction produces. Then determine the rate of heat loss over a period of time, say take temp every minute for 30 minutes, and plot a graph. This will give you a calibration curve that you can use to apply a correction for your calorimeter.</span>
Answer is Option B. charlie should repeat the caliper test
Answer:
1.the drop of blood gets deoxygenated and enters the Superior and Inferior Vena Cava.
2.after that it will enter the right atrium.
3.the the drop of blood will enter the Tricuspid valve.
4.next the drop of blood will enter the right ventricle.
5.after that the drop of blood will enter the pulmonary valve.
6.next the drop of blood will enter the pulmonary artery.
7.afterwar the drop of blood will exchange CO2 and O2 of lungs.
8.the drop of blood becomes oxygenated and enters the pulmonary veins.
9.the drop of blood enters left atrium.
10.next the drop of blood enters the bicuspid or mitral valve.
11.the drop of blood witll next enters the left ventricle.
12.the drop of blood will next enters the aortic valve
13.and lastly the drop of blood enters the aorta.
Each year, an estimated 1.69 billion pounds of butts wind up every year. Cigarette butts are by far the most littered item in the world. They also present a potential serious hazard to nature. The butt itself is composed of two parts which are the plastic filter and the remnants of the used tobacco. The leftover tobacco may be biodegradable but the filters are made from a plastic material known as cellulose acetate-- a chemical compound that breaks down but never disappears.