Why must a hypothesis be both testable and falsifiable? A Scientific Hypothesis Must Be Falsifiable A hypothesis may be testable, but even that isn’t enough for it to be a scientific hypothesis. In addition, it must be possible to show that the hypothesis is false if it really is false. Consider this statement: “There are […]
What are the main features of Rockwell hardness test?
What are the main features of Rockwell hardness test? The Rockwell hardness test is based on the measurement of the depth to which an indenter is forced by a heavy (major) load beyond the depth resulting from a previously applied preliminary (minor) load. What is the principle of Rockwell hardness test? Rockwell is a method […]
Which two solutions have similar solubilities at 40 C?
Which two solutions have similar solubilities at 40 C? Answer is: Na₂HAsO₄ and Na₂SO₄. 1) Solubility of NaCl (sodium chloride) at 40°C is 36.3 grams. Is the largest amount of solute that can dissolve? In most cases, only a certain maximum amount of solute can be dissolved in a given amount of solvent. This maximum […]
What organs are responsible for mechanical digestion?
What organs are responsible for mechanical digestion? Mechanical digestion begins in your mouth with chewing, then moves to churning in the stomach and segmentation in the small intestine. Peristalsis is also part of mechanical digestion. Why is chewing important? Chewing thoroughly not only makes it easier to swallow food, but also brings various benefits that […]
What are examples of biological factors?
What are examples of biological factors? Biological factors are microorganisms (bacteria, viruses, fungi and microscopic parasites), cell cultures, human endoparasites and components from microorganisms that can cause damage to health in humans. What are the biological influences in psychology? The biological perspective is a way of looking at psychological issues by studying the physical basis […]
Can one blister beetle kill a horse?
Can one blister beetle kill a horse? A single beetle with that level of toxin will not injure a horse. The blister beetle toxin, called cantharidin, is an irritant and a vesicant, meaning it causes blisters, said Marc Mattix, a veterinary pathologist with Montana’s Veterinary Livestock Laboratory in Bozeman. How do you kill blister beetles? […]
What are the 10 steps of the rock cycle?
What are the 10 steps of the rock cycle? Metamorphic rocks underground melt to become magma. When a volcano erupts, magma flows out of it. (When magma is on the earth’s surface, it is called lava.)…When the particles are carried somewhere else, it is called erosion. Transportation. Deposition. Compaction & Cementation. What is the rock […]
How do I introduce my students Heat?
How do I introduce my students Heat? 2 Introduction of New Material Before having groups start their videos ask students to provide examples of when they have experienced heat transfer in the real world. Ask them to think deeper about examples that have more than one form of heat transfer. Encourage debate about the most […]
What are strong electrolytes give two examples?
What are strong electrolytes give two examples? Strong acids, strong bases, and ionic salts that are not weak acids or bases are strong electrolytes. Salts much have high solubility in the solvent to act as strong electrolytes. HCl (hydrochloric acid), H2SO4 (sulfuric acid), NaOH (sodium hydroxide) and KOH (potassium hydroxide) are all strong electrolytes. Is […]
What evidence level is a cross sectional study?
What evidence level is a cross sectional study? Cross sectional study designs and case series form the lowest level of the aetiology hierarchy. In the cross sectional design, data concerning each subject is often recorded at one point in time. What is a disadvantage of a cross sectional study? The disadvantages of cross-sectional study include: […]