What is a Joule Second? - Explained Easily! - Physics Forums
2010年7月9日 · A Joule Second, also known as a Joule-Second or a Joule Second (J·s), is a unit of energy used in physics. It is a combination of the units Joule (J) for energy and second (s) for time. It is defined as the amount of energy transferred or expended in one second by a current of one ampere through a resistance of one ohm. 2.
How to convert cm^-1 into erg or joules - Physics Forums
2010年2月5日 · Yes, you can use a calculator to convert cm^-1 to erg or joules. Simply enter the number of cm^-1 and multiply it by the appropriate conversion factor (1.986 x 10^-23 for erg, or 1.986 x 10^-23 for joules). 4.
Do Joule Thief's Work With Supercapacitors - Physics Forums
2016年2月2日 · The Joule Thief is a simple electronic circuit that is designed to efficiently extract energy from a power source, such as a battery or supercapacitor, that is below its normal operating voltage. It works by utilizing the energy stored in the magnetic field of a coil to boost the voltage and provide a steady output. 2.
Joule thief : number of turns around the ferrite core - Physics Forums
2015年3月2日 · The optimal number of turns for a ferrite core in a Joule thief circuit can be determined through experimentation and testing. Start with a lower number of turns and gradually increase until the desired voltage output is achieved. Keep in mind factors such as input voltage and type of ferrite core may also affect the optimal number of turns.
Joule Mobile Mass Transporter Project - Physics Forums
2008年12月28日 · The Joule Mobile Mass Transporter has a wide range of potential applications, including transporting materials for construction projects, moving goods in logistics and shipping industries, and even transporting large vehicles or machinery. 4. What are the advantages of using the Joule Mobile Mass Transporter over traditional transportation methods?
Why 1 liter * atm = 101.33 joules - Physics Forums
2016年12月14日 · The equation 1 L atm = 101.33 Joules is derived from multiplying the gas constant and dividing by the gas constant, and can also be explained using the formula for work. The conversation also mentions the option of converting to …
What really is a Pascal and a Joule? - Physics Forums
2015年1月21日 · Joule Pascal. In summary, a pascal is a unit of pressure and can be thought of as force per unit area. A joule is a unit of energy or work and can be thought of as a force applied over a distance. These are important concepts in thermo and have been previously covered in introductory physics courses. Jan 21, 2015.
Converting Coulombs to Joules Without Voltage - Physics Forums
2015年8月1日 · To convert Coulombs to Joules without voltage, you will need to use the formula Q = CV, where Q is the charge in Coulombs and C is the capacitance in Farads. If you don't know the voltage, you can rearrange the formula to solve for Q and then use the formula for calculating energy, E = 1/2QV, to find the energy in Joules. 2.
Is it possible to have negative joules? - Physics Forums
2004年11月21日 · Yes, negative joules can be measured just like positive joules. In thermodynamics, the sign convention is used to indicate whether the work is being done by the system (negative joules) or on the system (positive joules). The magnitude of the joules can still be measured and calculated as usual. 5. What are some examples of negative joules in ...
Entropy Change from Joule Expansion - Physics Forums
2012年8月27日 · Change Entropy Expansion Joule. In summary, a thermally isolated cylinder with a piston is used to compress an ideal gas of N particles from its initial volume V to half its original volume V/2 in a quasistatic process. This results in a zero entropy change. In step two, the gas undergoes a Joule expansion back to its original volume V ...