What is an important difference between correlation and causation? Correlation suggests an association between two variables. Causality shows that one variable directly effects a change in the other. Although correlation may imply causality, that’s different than a cause-and-effect relationship. Is there a relationship between correlation and causation? While causation and correlation can exist at the […]
Why is the North Star Fixed?
Why is the North Star Fixed? Polaris, the North Star, appears stationary in the sky because it is positioned close to the line of Earth’s axis projected into space. As such, it is the only bright star whose position relative to a rotating Earth does not change. All other stars appear to move opposite to […]
Is advertising good or bad?
Is advertising good or bad? Yes, it can be harmful. But it can also be extremely beneficial to society. Advertising is an incredibly effective and powerful way to spread the word about important issues and products, such as AIDS awareness, diabetes monitors, tobacco and alcohol risks, and other health-related concerns. How does advertising affect people’s […]
Do concave mirrors produce real images?
Do concave mirrors produce real images? Only a concave mirror can be used to produce a real image; and this only occurs if the object is located at a position of more than one focal length from the concave mirror. Plane mirrors never produce real images. A concave mirror will only produce a virtual image […]
How do you overload your muscles?
How do you overload your muscles? 4 ways to progressively overload Increase resistance. Adding additional stress to your muscles allows them to break down, rebuild, and get stronger. Increase endurance (length of workouts) In order to increase endurance, you need to increase the length of your workouts. Increase tempo. Increase reps. What kind of exercise […]
How can you increase the kinetic energy of the particles in a substance?
How can you increase the kinetic energy of the particles in a substance? A rise in temperature increases the kinetic energy and speed of particles; it does not weaken the forces between them. The particles in solids vibrate about fixed positions; even at very low temperatures. Individual particles in liquids and gases have no fixed […]
Do emitted photoelectrons have same kinetic energy?
Do emitted photoelectrons have same kinetic energy? Hi, The answer to your question is NO. Technically if we use Einstein’s equation, then all photoelectrons should be emitted with same kinetic energy. Do all emitted electrons have the same kinetic energy? That fact, combined with the random messiness inherent in thermodynamics, means that no two electrons […]
What is the other name of electrolytic cell?
What is the other name of electrolytic cell? The electrochemical cells which generate an electric current are called voltaic cells or galvanic cells and those that generate chemical reactions, via electrolysis for example, are called electrolytic cells. A common example of a galvanic cell is a standard 1.5 volt cell meant for consumer use. What […]
Is silica good for hair?
Is silica good for hair? Silica doesn’t promote hair growth, but it does strengthen hair and prevent thinning. It does this by delivering essential nutrients to your hair follicles. As a bonus, it can also benefit your skin and nails. Can vitamin D regrow hair? Studies shows that vitamin D receptors, rather than the nutrient […]