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A cylinder contains 0.2m3 of steam at 7.0 bar.The mass of the steam is 0.8 kg. determine (a)The specific internal energy (b)The change in total internal energy if the steam is heated at constant pressure until it is dry saturated.

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May want to try this web site, they are good...

http://www.physicsforums.com/archive/index.php/t-232725.html

Posted on Oct 14, 2008

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How do the values for total mass before and after reaction demonstrate the law of conservation of matter?


"
  1. The law of conservation of mass, or principle of mass conservation, states that for any system closed to all transfers of matter and energy (both of which have mass), the mass of the system must remain constant over time, as system mass cannot change quantity if it is not added or removed."
In other words matter cannot be created or destroyed, only converted, into heat, energy, work, or other matter.

If your system is not closed (it probably isn't) and mass does not remain equal, then it is most likely that energy was gained or lost by the system. This most likely was in the form of heat.

You will need a pretty good scales to detect this though, as a tiny amount of matter = a huge amount of energy

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How to calculate mass for freight shipments?


The total mass is the sum of the masses of the individual pails
Total mass =18.49*2 kg =36.98 kg

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Where can i find the transmission type for a Kangoo 1.4 automatic


Renault Kangoo (KC) 1.4 i car data and specifications. Renault Kangoo (KC) 1.4 i car information and specs Bodywork Bodywork type Minivan Length (mm) 3995 Height (mm) 1827 Width (mm) 1663 Number of seats 5 Number of doors 4 Wheelbase (mm) 2600 Track rear (mm) 1418 Track front (mm) 1405 Ground clearance (mm) 140 Total (curb) weight (kg) 1155 Gross (max.) weight (kg) 1665 Max. cargo capacity (volume) 2600 Min. cargo capacity (volume) 650 Tires 165/70 R14 T Engine Engine displacement (cm3) 1390 Engine location Front, transverse Cylinder type In-line Bore (mm) 75.8 Number of cylinders 4 Compression ratio 9.5 Stroke (mm) 77 Valves per cylinder 2 Turbo - Fuel supply Distributed injection Engine power (hp) 75/5500 Engine torque 114/4250 Transmission Wheel drive Front Number of gears (automatic transmission) 4 Steering Type of steering Wheel-rail Power steering Hydraulic system Brakes Brakes rear Drum brakes Brakes front Ventilated disc brakes ABS + Performance Acceleration to 100 km/h 17.3 Fuel capacity (l) 50 Fuel consumption - city (l) 9.5 Fuel consumption - road (l) 6.3 Top (maximal) speed (km/h) 147

Renault Kangoo (KC) 1.4 i car bodywork specifications: Renault Kangoo is a minivan with 5 seats and has 4 doors. Dimensions information of car: 3995 mm long, 1827 mm high, 1663 mm wide. Other Renault Kangoo (KC) 1.4 i cars specs: 2600 mm wheelbase, rear track has 1418 mm, front track has 1405 mm, ground clearance - 140 mm. Total car weight is 1155 kg and 1665 kg of maximum weight, cargo capacity (volume) if from 650 to 2600. Tires type for Renault Kangoo (KC) 1.4 i is 165/70 R14 T. Car engine specifications: 1390 cm3 displacement, located front, transverse with in-line cylinders, 75.8 mm bore. Renault Kangoo (KC) 1.4 i has 4 cylinders. More car engine information: 9.5 compression ratio, 77 mm stroke, car has 2 valves per cylinder, distributed injection fuel supply type, engine power 75/5500 hp, engine torque equals 114/4250.
Transmission specifications of Renault Kangoo (KC) 1.4 i wheel drive is front, it has 4 gears of automatic transmission,.
Renault Kangoo (KC) 1.4 i has wheel-rail type of steering. And hydraulic system power steering.
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TMTM

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Which bars are healthier, Power Bars or Cliff Energy Bar?


Let's take a look at the nutritional differences between the two and then you can decide which one is better for your dietary needs. Calories wise, the Power Bar contains 250 calories and Cliff Energy Bars contain 230 calories. So not a big difference here. Regarding the amount of carbs and fats in each product, Power Bar contains 42 grams of carbs (20 gram of sugars) and 5 grams of fat (2.5 grams of saturated fat). Cliff Energy Bars contain 44 grams of carbs (23 grams of sugar) and 4.5 grams of fats (1.5 gram of saturated fat). Both bars contain 5 grams of fiber, which is 20% of the daily value of fiber for a 2,000 calories diet. Finally, Power Bars contain 10 grams of protein, while Cliff Energy Bars contain 9 grams of protein (protein is not really important for energy). So basically both bars have very similar nutritional values.

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What is first alww of thermodynamics


The first law of thermodynamics distinguishes between two kinds of physical process, namely energy transfer as work, and energy transfer as heat. It tells how this shows the existence of a mathematical quantity called the internal energy of a system. The internal energy obeys the principle of conservation of energy but work and heat are not defined as separately conserved quantities. Equivalently, the first law of thermodynamics states that perpetual motion machines of the first kind are impossible.

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Which layer of the sun is the hottest?and why?


Basic facts
  • Central temperature: 15,000,000 K
  • Surface temperature: 6,000 K
  • Distance from Earth: 150,000,000 kilometers (1 Astronomical Unit)
  • Size: 1,400,000 kilometer diameter
  • Mass: 2 x 10 30 kilograms (300,000 x the Earth's mass)
  • Average density: 1400 kg/m3(1.4 x water)
  • Solar energy reaching Earth: 1400 Watts/m2 (solar constant)
  • Total Luminosity of the Sun
    • equivalent to the energy flow through a sphere surrounding the Sun
    • The surface area of this sphere is 2.8 x 10 23 m2
    • So, the total luminosity is:
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  • Go to this page to get more information about The sun

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Machines are used to pack sugar into packets supposedly containing 1.20 kg each. On testing a large number of packets over a long period of time, it was found that the mean weight of the packets was 1.24...


Machines are used to pack sugar into packets supposedly containing 1.20 kg each. On testing a large number of packets over a long period of time, it was found that the mean weight of the packets was 1.24 kg and the standard deviation was 0.04 Kg. A particular machine is selected to check the total weight of each of the 25 packets filled consecutively by the machine. Calculate the limits within which the weight of the packets should lie assuming that the machine is not been classified as faulty.

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In fact there are 2 different conservation laws: conservation of mass and conservation of energy. Of course in a chemical or any other physical process these 2 laws will hold!
Conservation of mass: the mass of a closed (isolated system) system will remain constant over time.
Conservation of energy: total amount of energy in an closed system remains constant over time
Furthermore if we look into the relativity theory, it states that in fact mass and energy are two names for the same thing (the equivalence principle of mass and energy), neither one "appears" without the other.
Example: an iron nail left in a cup of water until it turns entirely to rust. A precise scale will register a change in mass. The energy will appear as heat, which will be lost to the environment so because of the conservation law you will see a loss in the mass of the system.

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