You can place a solid object directly on a scale, but a liquid always has to be in a container, and the container has weight. If you have a certain volume of a liquid in a beaker and you want its mass/weight, you must first find the weight of the empty beaker. You could weigh t...
At any point inside a given fluid ie let say at a depth h from the surface of the fluid, we have the gauge pressure acting at that point given by {eq}P=h\rho g {/eq}. {eq}\rho {/eq} is the density of the fluid g is the acceleration due to gravity...
How to find the max height at which a column of water can be supported by the atmosphere? Atmospheric Pressure: The pressure in the water column is directly proportional to the height of the fluid and the density of the fluid. The atmospheric pressure is {eq}...
mass = 23.7 g In real life, you can usually look up the density of commons liquids in reference books or online. While the calculation is simple, it's important to cite answer using the correct number ofsignificant digits. Also, pay attention to the units of your answer and make sure th...
通读全文,尤其是第一段中的“Water makes up 71% of the Earth's surface, but no one knows how or when such massive quantities of water arrived on the Earth. A new study published in the journal Nature brings scientists one step closer to answering that question.(水占 地球表面的71%,但...
This fruit infusion water pitcher is a great way to always have great tasting water on hand. Bubbles: Consider carbonated and sparkling water in addition to regular water. Many people find that adding sparkling water and 0 calorie flavored water makes drinking water throughout the day more fun...
5 billion years ago" " The team of researchers analyzed seven melted meteorites that crashed into Earth during billions of years in our solar system.”可知.研究者通过分析熔化的 陨石来进行研究。 故选B. 3.D 细节理解题 由"This led them to conclude that water was likely delivered to Earth ...
10.B)Bymeansofecholocation. 11.B)Toadapt themselves toaparticular lifestyle. 12.C) They become more emotionally aggressive. 13.D)They lack the cognitive and memory skills 14.B)Help their children understand the program's plot. 15.A)Explain its message to their children. ...
density = mass / volume You can rewrite the equation to solve for mass: mass = volume x density Densityof liquids usually is expressed in units of g/ml. If you know the density of a liquid and the volume of the liquid, you can calculate its mass. Similarly, if you know the mass an...
Getting to higher ground can allow you to wait until the crowd disperses or the situation becomes safer.爬到较高的地方可以让你等到人群分散或情况变得安全。Step 5: Avoid any choke points.第五步：避开任何堵塞点。If you can't find your way out of the human herd, try to avoid tight spaces...