Is ethanol solution a dependent variable? Variables: Independent variable: Reagents (ethanol, Na, concentrated ethanoic (acetic) acid, concentrated sulphuric acid, 2-hydroxybenzoic acid, pentanol, dilute sulphuric acid, potassium dichromate(VI) solution, propan-2-ol) Dependent variable: The qualitative changes in the substance (smell, colour, percipitate etc.) What factors could affect Daphnia heart rate? Daphnia is poikilothermic, which means that its […]
What are characteristics of groundwater?
What are characteristics of groundwater? Some of the most typical characteristics of groundwater are weak turbidity, a constant temperature and chemical composition and almost overall absence of oxygen. Circulating groundwater can have extreme variation in the composition with the appearance of pollutants and various contaminants. What is an example of groundwater? Groundwater originates from rain […]
Why can diamond not dissolve?
Why can diamond not dissolve? This is because of the relatively large amount of space that is “wasted” between the sheets. is insoluble in water and organic solvents – for the same reason that diamond is insoluble. Attractions between solvent molecules and carbon atoms will never be strong enough to overcome the strong covalent bonds […]
What are the four main electrical units of measurement?
What are the four main electrical units of measurement? The standard units of electrical measurement used for the expression of voltage, current and resistance are the Volt [ V ], Ampere [ A ] and Ohm [ Ω ] respectively. Is lightning current or static electricity? Lightning is caused by a buildup of static electricity […]
How did they lift the stones at Stonehenge?
How do you make a model of wind energy?
How does force affect swimming?
How does force affect swimming? The effect of buoyancy in swimming is best described by Archimedes’ principle: a body fully or partially submerged in a fluid is buoyed up by a force equal to the weight of the fluid that is displaced by the body. This effectively negates any effects that gravity might have on […]
Why can work output never be more than work input?
Why can work output never be more than work input? Because: Some of the work done by the machine is used to overcome the friction created by the use of the machine. Work output can never be greater than work input. Machines allow force to be applied over a greater distance, which means that less […]
Can energy leave a system?
Can energy leave a system? First Law of Thermodynamics: Energy can be changed from one form to another, but it cannot be created or destroyed. The total amount of energy and matter in the Universe remains constant, merely changing from one form to another. Is work out positive or negative? The first law is simply […]
Do you lose hair with radiation therapy?
Do you lose hair with radiation therapy? Radiation therapy can also cause hair loss on the part of the body that is being treated. Hair loss is called alopecia. Talk with your health care team to learn if the cancer treatment you will be receiving causes hair loss. How can I reduce WiFi radiation in […]