A piece of pure aluminum foil is cut to dimensions of 3.00 cm x 8.00 cm and its mass is measured as 0.265 gGiven the density of Al is 2.70 g/cm^3, and the dimensions of the diameter of a single Al atom is 2.86 x 10^-8 cm, how many Al atoms span the thickness of the foil?Could someone show me how to go about solving this problem?
It helps us to know whether you tried to solve this and where you got stuck(1) density mass/volume Therefore, volume mass/density volume (0.265 g)/(2.70 g/cm^3) 0.09815 cm^3 (2) Assume that the sheet is a regular rectangular solidvolume (length)(width)(height) (Here, height is the same as the thickness.) Therefore, height (volume)/((length)(width)) height (0.09815 cm^3)/((3.00 cm)(8.00 cm)) height 0.0040895 cm (3) from the height (thickness), calculate how many atoms would span that distance(0.0040895 cm)/(2.86 x 10^-8 cm) 1.43 x 10^5 atoms
4convection is the driving force of plate tectonics and it is the most effective means of moving heat from one place to other 8 the mid atlantic ridge is a divergent boundary where it is the ring of fire i am not sure what you are talking about in the other questions.
6summer in australia means its winter in new york, since they are in opposition hemispheres and the seasons are opposite as well 7The Earth goes through one complete precession cycle in a period of approximately 25,800 yearsLike a wobbling top, the direction of the Earth's axis is changing8The Mid-Atlantic Ridge is a mostly underwater mountain range of the Atlantic Ocean and Arctic Ocean that runs from 87°N to 54°S9One year on Neptune equals 165 Earth years, so it would be longer than an earth year because it is further from the sun.
1) It is spinning to it gets wider at the equator and shorter towards the poles 2) Silicon Oxide in the crust, Iron and nickel in the core 3) When formed from dust clouds gravitational potential energy is released as heat when the particles come together, the heat is sustained now through radioactive decay of radioactive elements 4) Convection is the movement of a body of a fluid due to changes in density caused by differences in temperature (Usually hot things rising but equally it can mean cold things falling)Examples include Steam rising from a ketlle or cup of coffee, air rising off a hot road, a hot air balloon ! 5) Well rising and falling mantle current cause the plates to move and if this pushes two plates together the more dense one subducts below the less dense oneBacause of the way that Continental plates form they are less dense so it is always the oceanic plate that subductsRiping I can only assume is a US term for consrvative plate margins where the same system pushes plates against each other instead of towards each other (San Andreas fault) 6) New York is in the Northern hemisphere and Australi in the Southern so their seasons are always opposite, it will be winterThe months however and dates are the same (It is summer in December in Australia) 7) Precession can mean a lot of things, a more specific example of what it is involved in is required8) The mid atlantic ridge is a, as you would expect, a ridge that runs almost all the way up the center of the atlantic oceanIt is caused by two oceanic plates moving apart allowing magma to rise and fill the gap and creating a ridge of submarine volcanoes9) Neptune is further from the sun from us so it's years are longer.
2hydrogen, oxygen, carbon dioxide 3there are different parts of the earths interioreach part is at a different temperature4its like a circular cycle of gasesthey go in a circular motionhot candles9longer im not sure about the others but i do know the answersi dont want to give you a wrong answer so therefore its better not to say them.
