What happens if you force magnets together? In other words, if you hold two magnets together so that like-poles are close together (two norths OR two souths), they repel. When two like-poles point together, the arrows from the two magnets point in OPPOSITE directions and the field lines cannot join up. So the magnets will […]
How many molecules are in a mole?
How many molecules are in a mole? The mole is represented by Avogadro’s number, which is 6.022×1023 atoms or molecules per mol. What is silica composed of? Silica (quartz): Silica, SiO2, is a chemical compound that is composed of one silicon atom and two oxygen atoms. It appears naturally in several crystalline forms, one of […]
What is good miles per gallon?
What is good miles per gallon? Don’t expect to attain higher than 20 mpg overall with a non-hybrid, and most offer less than 30 mpg on the highway. The best fuel-efficient non-electric vehicles get the following EPA-estimated combined numbers: Small Pickup: Chevrolet Colorado 2WD Diesel and GMC Canyon 2WD Diesel get 23 mpg. How much […]
Is upward positive or negative?
Is upward positive or negative? We consider the direction of gravity as positive and the upward direction as negative. Displacement is positive below the starting point and negative above. Velocity is positive in a downward direction and negative when going upward. For horizontal motion, right is positive and left is negative. Is lift an upward […]
What can we use iodine to test for?
What can we use iodine to test for? In the presence of starch, iodine turns a blue/black colour. It is possible to distinguish starch from glucose (and other carbohydrates) using this iodine solution test. For example, if iodine is added to a peeled potato then it will turn black. Benedict’s reagent can be used to […]
What is the relationship between buoyancy and volume?
What is the relationship between buoyancy and volume? Compressible objects As a floating object rises or falls, the forces external to it change and, as all objects are compressible to some extent or another, so does the object’s volume. Buoyancy depends on volume and so an object’s buoyancy reduces if it is compressed and increases […]
When would you use cumulative frequency?
When would you use cumulative frequency? Cumulative frequency is used to determine the number of observations that lie above (or below) a particular value in a data set. The last value will always be equal to the total for all observations, since all frequencies will already have been added to the previous total. What is […]
What are the 5 functions of leaves?
What are the 5 functions of leaves? As one of the most important constituents of plants, leaves have several essential functions: Photosynthesis. Transpiration. Guttation. Storage. Defense. Conifer Leaf. Microphyll Leaf. Megaphyll Leaf. What are two function of leaves? Its main functions are photosynthesis and gas exchange. A leaf is often flat, so it absorbs the […]
What are 2 main types of scientific inquiry?
What are 2 main types of scientific inquiry? The word Science is derived from Latin and means “to know” Inquiry is the search for information and explanation. There are two main types of scientific inquiry: discovery science and hypothesis-based science. What is the scientific method of discovery? The process in the scientific method involves making […]
Is beating of drum periodic motion?
Is beating of drum periodic motion? The beating of the drum occurs at defined period. So, it is a periodic motion. Which is periodic wind? Periodic winds blow at regular intervals or in regular cycles. They are winds that result from localised differences in pressure and temperature. For example, land and sea breezes and the […]