What is the energy of light that has a wavelength of 400 nm? Solution: From the previous problem, the energy of a single 400 nm photon is 3.1 eV. What is the minimum energy needed to remove an electron from sodium? 3.3e When light with a wavelength of 400 nm falls on the surface of […]
When would you use a hypertonic solution?
When would you use a hypertonic solution? Examples of when hypertonic solutions are used include to replace electrolytes (as in hyponatremia), to treat hypotonic dehydration, and to treat certain types of shock. Solutions with a lower concentration of solutes than isotonic solutions are hypotonic. What is 3 hypertonic saline used for? Conclusions: Hypertonic saline administration […]
How can you protect estuaries in the water?
How can you protect estuaries in the water? Estuaries Conserve water in your daily life. Dispose of household and yard chemicals properly; follow disposal directions on their labels. Don’t be wasteful: reduce, re-use and recycle every day. Pick up trash; participate in trash clean-up days. What is another name for the Mesopelagic zone? The mesopelagic […]
What are 6 changes of state?
What are 6 changes of state? Common changes of state include melting, freezing, sublimation, deposition, condensation, and vaporization. Is energy added or removed in evaporation? All matter is made of tiny moving particles called molecules. Evaporation and condensation happen when these molecules gain or lose energy. This energy exists in the form of heat. Evaporation […]
What is the flow rate of water through a 1/2 pipe?
What is the flow rate of water through a 1/2 pipe? Assume Average Pressure. (20-100PSI) About 12f/s flow velocity Sch 40 Pipe Size ID (range) GPM (with minimal pressure loss & noise) 1/2″ .50-.60″ 14 gpm 3/4″ .75-.85″ 23 gpm 1″ 1.00-1.03″ 37 gpm Does a longer pipe have more resistance? In general, any pipe […]
How do trains pass each other?
How do trains pass each other? A passing loop (UK usage) or passing siding (North America) (also called a crossing loop, crossing place, refuge loop or, colloquially, a hole) is a place on a single line railway or tramway, often located at or near a station, where trains or trams travelling in opposite directions can […]
What strong emotions do people feel when they are asked to change?
What strong emotions do people feel when they are asked to change? In the face of change, the emotional part takes over and sends alerts that cause stress. Adrenaline and other stress hormones are released and negative emotions dominate thinking. This anxiety causes people to imagine the worst. What change feels like? Change feels like […]
How many layers of molecules are in the plasma membrane?
How many layers of molecules are in the plasma membrane? The plasma membrane is an extremely pliable structure composed of 2 layers of back-to-back phospholipids (a “bilayer”). Cholesterol is also present between the phospholipids, which contributes to the fluidity of the membrane. There are various proteins embedded within the membrane that have a variety of […]
How can you remove energy from matter?
How can you remove energy from matter? Going through a phase. Adding or removing energy from matter causes a physical change as matter moves from one state to another. For example, adding thermal energy (heat) to liquid water causes it to become steam or vapor (a gas). And removing energy from liquid water causes it […]
How do you find initial speed?
How do you find initial speed? If you know values for the distance, time, and acceleration, you can use the following equation: Initial velocity: Vi = (d / t) – [(a * t) / 2] Understand what each symbol stands for. Vi stands for “initial velocity” d stands for “distance” a stands for “acceleration” t […]