Category: Physics

Which substance is a compound Water Gold oxygen? Therefore the answer is that water is a compound as its chemical make up is H2O. What type of mixture is gold? b) 14-karat gold is an alloy of gold and other metals such as copper and silver. Alloys are homogeneous mixtures. Pure gold is referred to […]

Is a 20 minute run worth it? Greater motivation – If you know you’ve only got to run for 15-20 minutes, you’ll be less tempted to skip a run. This means you’re more likely to stick to a running schedule in the long-term, therefore reaping the health and fitness benefits. If you run for 20 […]

How do you calculate the earliest start? The formula used for calculating Early Start and Early Finish dates: Early Start of the activity = Early Finish of predecessor activity + 1. Early Finish of the activity = Activity duration + Early Start of activity – 1. What is difference between PERT and CPM? PERT is […]

Does 100% humidity mean rain? The relative humidity measured on the ground (where the sponge is) doesn’t reflect moisture levels miles above in the sky. Rain occurs when the rising air can no longer hold the water droplets that have formed clouds high in the sky. So 100 percent humidity might not mean rain, but […]

Which type of igneous rock would have the least amount of silica? Ultrabasic: rocks that are usually less than 45% silica (mostly mafic minerals such as olivine and pyroxene), e.g. peridotite. Is mafic light or dark? Chemically, mafic rocks are enriched in iron, magnesium and calcium and typically dark in color. In contrast, the felsic […]

Which Colour absorbs Least Heat? The more light the object absorbs, the more heat absorbed since light is energy. If you consider it a color, black absorbs the most heat. A black object absorbs all wavelengths of light and reflects none. Objects that are white, on the other hand, reflect all wavelengths of light and […]

Are we living in a black hole? Black Holes All the Way Down We can’t calculate what happens in a black hole’s singularity — the laws of physics literally break down — but we can calculate what happens on the boundary of an event horizon. We might live in a universe within a black hole […]

How do you determine the number of electrons in silver? Silver has 47 electrins per atom, and its molar mass is 107.87gmol-1. Number of electrons is 47n=2.62×1024. What is the electron density of silver? 10.5 g/cm3 How do you determine electron density? Counting Regions of High Electron Density. Draw the Lewis structure for the molecule […]

Can you tell when a slot machine will hit? No one looking at the slot machine can predict the number it will choose next. This is why a slot machine can never be said to be “due” to hit a jackpot. Bet a single coin until you see the reels wiggle, then bet the max […]

What is the use of system unit? This unit performs the majority of the functions that A computer is required to do. The term system unit is generally used to differentiate between the computer itself and its peripheral devices, such as the keyboard, mouse and monitor. A system unit is also known as a chassis […]