What are 3 reasons models are used in science? Models are useful tools in learning science which can be used to improve explanations, generate discussion, make predictions, provide visual representations of abstract concepts and generate mental models (Treagust, Chittleborough and Mamiala, 2003). What are models? In general, a model is an informative representation of an […]
Is Na an S covalent bond?
How is energy used in everyday life?
How is energy used in everyday life? When we talk about residential uses of energy, these are the most basic uses of energy. They include watching television, washing clothes, heating and lighting the home, taking a shower, working from home on your laptop or computer, running appliances and cooking. What is the importance of energy […]
What are the 14 transition metals?
What are the 14 transition metals? Typically the elements of the post-transition metals include any metal in groups 13, 14, and 15 which are aluminum, gallium, indium, tin, thallium, lead, and bismuth….Here is a list of post-transition metals in order of abundance in the Earth’s crust: Aluminum. Gallium. Lead. Tin. Thallium. Indium. Bismuth. Can metals […]
How do warm currents affect the weather?
How do warm currents affect the weather? Ocean currents act as conveyer belts of warm and cold water, sending heat toward the polar regions and helping tropical areas cool off, thus influencing both weather and climate. When water molecules are heated, they exchange freely with the air in a process called evaporation. Why is ocean […]
What are some similarities between a motor and a generator?
What are some similarities between a motor and a generator? Major similarities between motor and generator Both use the magnetic field as a coupling medium to convert from. Moter converts Electrical → Mechanical→ The generator converts Mechanical → Electrical. Both maybe have armature winding, field winding, core… etc. But the working concept of both is […]
Is HCl soluble in water?
What is a 100 ohm resistor used for?
What is a 100 ohm resistor used for? Commonly used in breadboards and other prototyping applications, these 100 ohm resistors make excellent pull-ups, pull-downs and current limiters. These thick-lead versions of the resistors fit snugly into a breadboard with very little movement, so you should have few to no issues using them in your next […]
What type of optical device can be used to project an image onto a screen?
What type of optical device can be used to project an image onto a screen? projector Which optical devices can form only virtual images? Explanation: A concave lens always produces a virtual upright and small image of an object irrespective to the location of object. What are old projectors called? Analog projectors, more commonly known […]
How do fossils provide evidence for past ecosystems?
How do fossils provide evidence for past ecosystems? fossils provide clues about both abiotic and biotic factors of past ecosystems. fossils provide evidence about the changes in climate and temperature of past ecosystems. fossils can give us clues about how organisms interacted with one another. What kind of fossils tell us about social behavior? The […]