What happened to the second marble after it was hit by other small marble? Answer: When a marble strikes another marble which is at rest, the law of conservation of momentum and energy comes into action. According to this law, in an isolated system the total momentum and energy are conserved. What causes the marble […]
What is a common unbalanced force?
What is a common unbalanced force? Common forces that are often unbalanced include the force of gravity and applied forces. When these forces are unbalanced, objects accelerate, change their position and find new configurations for which all forces are again balanced. The weight of an object is the force exerted by gravity on that object. […]
At what depth does light disappear in the ocean?
At what depth does light disappear in the ocean? Sunlight entering the water may travel about 1,000 meters (3,280 feet) into the ocean under the right conditions, but there is rarely any significant light beyond 200 meters (656 feet). Why does it get windy when the sun comes up? When the sun heats the earth, […]
Can the lattice structure be used to predict properties?
Can the lattice structure be used to predict properties? The elastic properties of the engineered lattice, as predicted by the Bloch wave theory, can be used to accurately determine the elastic response of the periodic lattices, even through the theory assumes an infinite periodic structure and the sample size is only a few unit cells. […]
Who killed Aristotle?
Who killed Aristotle? Alexander the Great Who was Aristotle’s most famous student? What is the major contribution of Aristotle? Aristotle is a towering figure in ancient Greek philosophy, who made important contributions to logic, criticism, rhetoric, physics, biology, psychology, mathematics, metaphysics, ethics, and politics. He was a student of Plato for twenty years but is […]
What are the 4 Minnesota biomes?
What are the 4 Minnesota biomes? Minnesota is fortunate to lie at the center where four major North American ecological regions, or biomes, converge: aspen parklands, prairie grasslands, deciduous forest, and coniferous forest. What is the smallest biome in Minnesota? Tall Grass Aspen Parkland What is the most productive biome in Minnesota? Prairie Parkland Does […]
What three characteristics do all psychological tests have in common?
What three characteristics do all psychological tests have in common? 5 Main Characteristics of a Good Psychological Test Objectivity: The test should be free from subjective—judgement regarding the ability, skill, knowledge, trait or potentiality to be measured and evaluated. Reliability: This refers to the extent to which they obtained results are consistent or reliable. Validity: […]
How do I know if two lines are parallel?
How do I know if two lines are parallel? We can determine from their equations whether two lines are parallel by comparing their slopes. If the slopes are the same and the y-intercepts are different, the lines are parallel. If the slopes are different, the lines are not parallel. Unlike parallel lines, perpendicular lines do […]
How can you improve the results of an experiment?
How can you improve the results of an experiment? You can increase the validity of an experiment by controlling more variables, improving measurement technique, increasing randomization to reduce sample bias, blinding the experiment, and adding control or placebo groups. What is the minimum number of times an experiment should be repeated? Most teachers want you […]
At what temperature do heat pumps become ineffective?
At what temperature do heat pumps become ineffective? Heat pumps do not operate as efficiently when temperatures drop to between 25 and 40 degrees Fahrenheit for most systems. A heat pump works best when the temperature is above 40. Once outdoor temperatures drop to 40 degrees, heat pumps start losing efficiency, and they consume more […]