What is example of negative work? Negative work follows when the force has a component opposite or against the displacement. Negative work removes or dissipates energy from the system. Two examples: In pulling a box of books along a rough floor at constant velocity, I do positive work on the box, that is I put […]
Was Newton an average student?
Was Newton an average student? You see, when Newton first started his studies at The King’s School in Grantham, England, he was, for all intents and purposes a decidedly average student. Now it’s recorded that along with being a fairly average student, Newton was also a very lonely young boy who suffered at the hand […]
What is meant by anodising?
What is meant by anodising? Anodising is an electrolytic process for producing thick oxide coatings, usually on aluminium and its alloys. The oxide layer is typically 5 to 30µm in thickness and is used to give improved surface resistance to wear and corrosion, or as a decorative layer. What is anodising give its application? Anodising […]
What happens if we drink expired beer?
What happens if we drink expired beer? Expired alcohol doesn’t make you sick. If you drink liquor after it’s been open for more than a year, you generally only risk a duller taste. Flat beer typically tastes off and may upset your stomach, whereas spoiled wine usually tastes vinegary or nutty but isn’t harmful. Can […]
What passes through the filtration membrane?
What passes through the filtration membrane? The resulting filtrate is a dilute solution that includes water, electrolytes, wastes, nutrients, and other molecules able to pass through the filtration membrane. The regulation of the rate of filtration is important. What three hormones factors do the kidneys secrete into the blood? The kidney secretes (1) renin, a […]
What gives the measure of inertia?
What gives the measure of inertia? There are two numerical measures of the inertia of a body: its mass, which governs its resistance to the action of a force, and its moment of inertia about a specified axis, which measures its resistance to the action of a torque about the same axis. See Newton’s laws […]
What is the physical and chemical properties of matter?
What is the physical and chemical properties of matter? A physical property is a characteristic of a substance that can be observed or measured without changing the identity of the substance. Physical properties include color, density, hardness, and melting and boiling points. A chemical property describes the ability of a substance to undergo a specific […]
Why do horses run until they die?
Why do horses run until they die? Yes, horses can run themselves to death. While running, horses place their cardiovascular and respiratory systems under a lot of pressure, which could, in some situations, lead to a heart attack, stroke, or respiratory failure, and lead to death. Do horses really need shoes? Domestic horses do not […]
Where is most of your immune system located?
Where is most of your immune system located? Bone marrow That is where most immune system cells are produced and then also multiply. These cells move to other organs and tissues through the blood. At birth, many bones contain red bone marrow, which actively creates immune system cells. What organs are in immune system? The […]
What are physical properties Class 7?
What are physical properties Class 7? Physical properties include size, shape, colour and state (solid/liquid/gas) of a substance. Any change to the physical properties of a substance is called a physical change. Physical changes are usually reversible as no new substance is formed. It is the same substance but with changed physical properties. What are […]