Category: Physics

What is a psychophysical test? In psychophysics, experiments seek to determine whether the subject can detect a stimulus, identify it, differentiate between it and another stimulus, or describe the magnitude or nature of this difference. Software for psychophysical experimentation is overviewed by Strasburger. What is meant by psychophysical action? In essence, psychophysical actions are physical […]

What is the best beer to drink when on a diet? If you enjoy the taste of beer but want to decrease your caloric intake, grab a light beer instead. These beers have 100 calories or less: Budweiser Select 55 (55 calories) Miller 64 (64 calories) Is Corona beer sugar free? The 4.5% ABV beverage […]

How do you open a Master combination lock without the code? Pull up gently on the shackle and hold it in place. Turn the dial clockwise listening carefully until you hear the lock click. Start with a good deal of pressure and gently let up as you spin it around, until you meet resistance in […]

What does baking powder do for bubbles? Baking powder and baking soda fall into the category of chemical leaveners. This means they react with another substance to release carbon dioxide (gas). The gas forms trillions of tiny bubbles, which expand and give rise to baked goods. What happens when you mix white vinegar and baking […]

How many years does it take for 90% of a carbon 14 specimen to decay? The halflife of carbon 14 is 5730 ± 30 years, and the method of dating lies in trying to determine how much carbon 14 (the radioactive isotope of carbon) is present in the artifact and comparing it to levels currently […]

What is the relationship between effort and distance? Work input is the work done on a machine. The work input of a machine is equal to the effort force times the distance over which the effort force is exerted. What is load distance and effort distance? Load Distance: Distance a load moves when acted on […]

What is the range of water cement ratio? 0.3 to 0.8 What is the minimum water cement ratio? The minimum water cement (w/c) ratio depends on factors like fineness of cement (Min 280 kg/m3), clinker used, Sp. gravity and grain size. Basically, min w/c ratio will be 0.4 for concrete. But for mortar, it will […]

How does electron emission work? Electron emission is the process when an electron escapes from a metal surface. Every atom has a positively charged nuclear part and negatively charged electrons around it. Sometimes these electrons are loosely bound to the nucleus. Hence, a little push or tap sets these electrons flying out of their orbits. […]

Why is wind energy considered a renewable resource quizlet? Why is wind considered a renewable resource? Because wind energy cannot be used up, in areas that have constantly high levels of wind, this is a sustainable, inexpensive energy source. Energy from the sun is called solar energy. What is the key difference between renewable and […]

In which case is work not done? Work is zero if applied force is zero (W=0 if F=0): If a block is moving on a smooth horizontal surface (frictionless), no work will be done. Note that the block may have large displacement but no work gets done. How do you calculate work done? Work is […]