Category: Physics

What are the dimensions of the quantity? The dimension of a physical quantity is defined as the powers to which the fundamental quantities are raised in order to represent that quantity. The seven fundamental quantities are enclosed in square brackets [ ] to represent its dimensions. What are the dimensions of the quantity 1? The […]

How do we calculate tension? Tension Formulas – How to Calculate Tension Force Tension can be easily explained in the case of bodies hung from chain, cable, string etc. T = W ± ma. Case (iv) If the body moves up or down with uniform speed, tension; T = W. T=m(g±a) As tension is a […]

How does a fan convert energy? (The fan’s blades move air around the room. The kinetic energy of the moving blades does work in moving air through the fan blades.) The fan converts electric energy into kinetic energy that does work, and it converts some electric energy into heat.) What does a fan do to […]

How do astronomers detect dark matter? Galaxy clusters are particularly important for dark matter studies since their masses can be estimated in three independent ways: From the scatter in radial velocities of the galaxies within clusters. From X-rays emitted by hot gas in the clusters. Is dark matter invisible? Scientists have not yet observed dark […]

What type of fusion occurs in a high mass star near the end stages of its life cycle? What type of fusion occurs in a high-mass star near the end stages of its life cycle? helium burning. Is there a loss of mass in nuclear fusion? A helium nucleus has a mass that is 0.7% […]

What kind of variable is behavior? An ordinal variable is a categorical variable for which the possible categories can be placed in a specific order or in some ‘natural’ way. In Table 2, the variable ‘behaviour’ is ordinal because the category ‘Excellent’ is better than the category ‘Very good’, etc. Which of the following is […]

How do you make a dead lithium battery work again? Full Recharge You’ll need to completely drain the battery for this to work, so once it reaches zero percent, keep turning it back on until it doesn’t even have enough power to boot. Now, plug in the power cord (to a power outlet) and let […]

How old are pop up books? Yes, pop-up books are typically intended for children, but really they bring out the inner child in anyone six months to 70 years old with their interactive nature. Are pop up books still made? The pop-up then goes into production, as Iain Smyth, the paper engineer behind the new […]

What is a good salary for a scientist? The average Scientist salary in the United States is $108,279 as of April 27, 2021. The range for our most popular Scientist positions (listed below) typically falls between $46,758 and $169,800. What type of scientist makes the most money? There are dozens of career specializations in science, […]

Does condensation need heat? Latent heat is the heat energy required to change a substance from one state to another. Energy is required to change from solid to liquid, liquid to gas (evaporation), or solid to gas (sublimation). Energy will be released to change from liquid to solid (fusion), gas to liquid (condensation), or gas […]