Design a spherical sensible heat storage tank for the concentrator that can store 4 mwh of energy at 574 °c using molten salt (53kno3-40nano3-7nano3 per weight). (a) assuming a 95% heat recovery efficiency from the storage tank, determine the required mass and volume of salt, including the radius of the cylinder that contains the required volume of salt. (b) assuming no wind and an ambient temperature of 25°c, determine the thickness of mineral wool insulation with thermal conductivity k = 0.018 w m-k-1 that will enable this tank to limit heat loss to 1°c per day. (c) scale the storage up to 50 mwh, recalculating its size and insulation. comment on the scalability of the system, i. e. is it better to build a small or a large storage tank?

Consider three unlabeled bottles, each contain small pieces of one of the following metals. - magnesium - sodium - silver the following reagents are used for identifying the metals. - pure water - a solution of 1.0 molar hcl - a solution of concentrated hno3 (a) which metal can be easily identified because it is much softer than the other two? describe a chemical test that distinguishes this metal from the other two, using only one of the reagents above. write a balanced chemical equation for the reaction that occurs. (b) one of the other two metals reacts readily with the hcl solution. identify the metal and write the balanced chemical equation for the reaction that occurs when this metal is added to the hcl solution. use the table of standard reduction potentials (attached) to account for the fact that this metal reacts with hcl while the other does not. (c) the one remaining metal reacts with the concentrated hno3 solution. write a balanced chemical equation for the reaction that occurs. (d) the solution obtained in (c) is diluted and a few drops of 1 m hcl is added. describe what would be observed. write a balanced chemical equation for the reaction that occurs.

No copying 15 pts how does a free-body diagram tell you about the net force on an object?

Ascientist is measuring the pressure that is exerted by each of the following gases in the atmosphere: carbon dioxide, oxygen, and nitrogen. which term most likely describes what she is measuring?