Capacity Definition and 639 Threads

Hey guys, I need to figure out how to make a simple test circuit so I can test how much energy is stored inside various power sources (probably 1-10V, ~10mA range). I figured all I need to do to get a rough estimate of how much power these sources (they're like batteries, not continuous...

The heat capacity of lead is 0.130 J/g C. How many joules of heat are required to raise the temperature of 28.5 grams of lead from 15 to 37? For this problem the formula that must be used is q = m*C*deltaT, where mass is expressed in g? q = m*C*deltaT q = (0.130 J/g*C)*(28.5 g Pb)*(37 -...

Explain how it is possible for a 30,000 kg of snow at 0 deg C to contain more heat energy than 1 mL of liquid water at 100 deg C. (Assume a pressure of one atmosphere.) I am unsure of where to start this? Help Is there a formula?

Hi, If a heat flux of of 3W/ meter squared covered the 3.6 X 10^14 meters squared ocean surface and contributed only to a change in temp, how many years to raise average temp of ocean 1 degree C? I calculated the specific heat of seawater which is 4,000 joules. I am stuck!

Is there any direct relationship between these 2 properties of a matter?

Hi friends, Can we construct an engine that can shift its engine capacity i.e. CC. Means if we are looking for power , we can go for option with higher capacity & when we demand for better milage we can go for engine with lower capacity.Is there any such engine available? Any help...

Explain how it is possible for a 30,000 kg of snow at 0 deg C to contain more heat energy than 1 mL of liquid water at 100 deg C. (Assuming a pressure of one atmosphere.)

Me again. Is there a formula for the maximum amount of charge may be stored on a body (assume spherical) of radius r? I assume radius is the only factor, though mass is known also. I just don't remember seeing anything for this and can't find it in all my books for the life of me. Thanks.

Does anyone know if Windows XP Professional has a cap on how much hard drive space it can see? I'm planning on getting a 250 GB hard drive and putting it on there.

Does the specific heat capacity of an object affect the rate of transfer of energy from an object to another? For instance, alcohol has a lower specific heat capacity than water. If they are both at 50 degree Celsius and poured into a beaker containing water of 20 degree Celsius respectively...

Energy is the capacity to do work. Work is the result when a force moves an object by a distance. So Energy is the capacity to move an object by a distance by applying a force. Now kinetic energy is what? and what is potential energy. Suppose i am sitting on the surface of Earth what...

Hi, could someone help me get started on this problem, I am having a lot of difficulty comprehending these types of problems. THanks for your help guys. A cup is made of an experimental material that can hold hot liquids without significantly increasing its own temperature. THe .79 kg cup...

Whats the heat capacity of NaOH I can't find it anywhere?

how does the cooling capacity of an aircon compressor exceed that of the power supplied to it? from what i understand, energy cannot be created or destroyed. so when we put in 500W of electrical energy into a compressor, why do we expect the cooling capacity to be 1500W. does that mean that...

I had a lab about tin's heat of fusion. I need to know tin' specific heat near fusion point. Can anybody advice any useful resourse? I have two books, in which are opposite data. I suppose that liquid tin must have higher heat capacity as solid ("liquid" molecules have more "freedom"). Help me...

A certain car batter with a 12.0 V emf has an initial charge of 120 A*h. Assuming that the potential across the terminals stays constant until the battery is completely discharged, for how many hours can it deliver energy at the rate of 100 W? I am not sure how to get time into the...

I don't know how to get started on this question, what equations should I be using? A freezer unit has a 1kW compressor, and can maintain the refigerated space at -10 C while the ambient temperature is 20 C. It is claimed that the unit has a refigeration capacity of 2 kW. Is this claim...

This is what I've got: Iron mass: 81.9g Initial iron temp.: 92'C Water volume: 100mL Initial water temp.: 25'C Final water temp.: 29'C What the the experimental heat capacity of iron? Thanks :) Bjorn

Hello again. My friend is also doing his science fair project and he has trouble thinking of ways that we can apply "relationship of heat capacity and viscosity" to everyday life. His experiment is basically just to examine how much the temperature of fluids with different viscosities are...

Is there a graph or chart somewhere that would show how much bandwidth can be handled at certain frequencies?

Can anyone help? I have an interesting issue. I've chosen to study maths and computer science and one of the problems I've been asked to solve, potentially using a 3D Modeling formula is: In a Shared Server environment, where total capacity of a server is measured by total CPU capacity, total...

:shy: Can anyone help? I have an interesting issue. I've chosen to study maths and computer science and one of the problems I've been asked to solve, potentially using a 3D Modeling formula is: In a Shared Server environment, where total capacity of a server is measured by total CPU capacity...

A) What temperature will the energy per mole of a solid achieve one third its classical value of 3RT. Express in terms of einstein temperature Einstein Temperature T_{e} = \frac {h \nu}{k} where h is Plancks constant k = boltzmann's constant Not really sure on how to do this? Do i...

When using a different calorimeter, and mixing 50 ml of hot water at 65 C with 60 ml of water in the calorimeter at 25 C, the temperture of the calorimeter increased by 5.5 C. Calculate the heat capacity of this calorimeter. Is this a better or worse calorimeter than the one used in the sample...

Find the molar heat capacity of the monoatomic ideal gas in the constant gravitational field. (clue: find the average potential energy as a function of temperature using the barometric formula.) could someone please help me out?

I partitioned my hard drive into two sectors (I installed windows on one).. it turns out to be too small (sp2 makes a backup of the whole system :rolleyes:).. I'm at a loss how to redistribute the size though :rolleyes: Anyone a clue? I'm running Windows XP (I guess I need to go into BIOS at...

Hello, Faizan Here Can anyone show ne how to derive the formula of specific heat capacity pls.? Also i need the derivation of the formula of magnification power of a lens? Thanks in advance to anyone who helps me.

Hey, can anyone describe to me an experiment to find the specific heat capacity of ice? Keep it simple please :smile: Thanks in advance :wink:

Alright. I submit. I'm lost. I've been working on a plan for a derigible, or airship, and found that I've run into a problem. I've been using the equasion: [(H x W x L) x Pi] / 3 to calculate the capacity of the airbags within the derigible. I don't think this is correct so please help me...

I have a homework problem that asks me to find the charging capacity of a battery. I wasn't sure how to find this or what equation to use. I wasn't sure if the charging capacity was an equivalent to the capacitance. Can someone point me in the right direction? Note: I am given it's a 12 V...

Does the mind have a limit to knowledge it can obtain or over time or can it do anything? More time depending on the persons skills of course? For example Math. I'm in Grade 10 I take normal Math. I have trouble with the occasional thing but if I do I practice it. There isn't any math I've...

Here's the problem: To measure the heat capacity of an object, all you usually have to do is put it in thermal contact wit another object whose heat capacity you know. As an example, suppose that a chuck of metais immersed in boiling water (100 degrees), then is quickly transferred into a...

Hello again! I'm not sure if this is difficult but I believe that everyone have experienced this... I can't explain it... =) Sorry about that. Anyway, here's my problem... At noon, when the sand in the beach is already hot, why does the water still feel cold? Early in the night...

Specific Heat Capacity help! This question is simple but I'm a little confused, it involves beach breezses, temperature, and convection. Sand on the beach get much hotter than water on sunny day so air above sand heats up and rise due to convection then cold air moves in from over water...

40GB? 60GB? 80GB? Bull****t! I long time ago had found that the hard drive i bought contains less space that what it claims. look at this: Are we cheated by the manufacturers?

Hi all, I installed XP on a newly bought 40G hard drive (Western Digital) and when I inserted the Data Lifeguard disk to format it, it informed me that NT only recognizes 8 G...but my system isn't NT, it's XP. How do I get around this so I can use all 40G...? I just got informed by my...

what is the most powerful battery existing (by powerful i mean by power capacity/size ratio)

Hello, 150kcal of heat raises the temp of 2.0kg of material by 400 degrees F. Whats the materials specific heat capacity? I cam up with 1.35 kcal/kg degrees C. is this correct? Thanks! Dx :wink:

Please help me understand. I have pondered this before but recent events have brought it up again and I don't really know how to ask this question so... Do peoples of the world that have a more primitive goverenance, such as tribalism, have an inherently diminished capacity for reasoning? If...