/ Pounding a nail into wood makes the nail warmer. Consider a 5-gram steel nail 6-cm long and a hammer that exerts an average force of 500-N on the nail when it is being driven into the wood. What is the increase in the nail’s temperature if the specific heat capacity of steel is 450 J/kgˑC° using this formula: Work is given by F X d, and temperature change as Q = cm ∆T. (Hint: convert the unites to more manageable amounts). 2/ Using the formula: Power = Current X Voltage, find the current drawn by a 1200-W hair dryer connected to 120V. 3/ Two point charges are separated by 6cm. The attractive force between them is 20 N. What is the force between them when they are separated by 12cm? (Hint: This involves relative distance only). 4/ Find the voltage change when an electric field does 12 J of work on a charge of 0.0001C. 5/ Find the voltage change when an electric field does 24 J of work on a charge of 0.0002C. 6/ If a red-hot nail is immersed in warm water, the direction of heat flow will be from the
Energy transfer
The flow of energy from one region to another region is referred to as energy transfer. Since energy is quantitative; it must be transferred to a body or a material to work or to heat the system.
Molar Specific Heat
Heat capacity is the amount of heat energy absorbed or released by a chemical substance per the change in temperature of that substance. The change in heat is also called enthalpy. The SI unit of heat capacity is Joules per Kelvin, which is (J K-1)
Thermal Properties of Matter
Thermal energy is described as one of the form of heat energy which flows from one body of higher temperature to the other with the lower temperature when these two bodies are placed in contact to each other. Heat is described as the form of energy which is transferred between the two systems or in between the systems and their surrounding by the virtue of difference in temperature. Calorimetry is that branch of science which helps in measuring the changes which are taking place in the heat energy of a given body.
Dear Sir/ Madam,
1/ Pounding a nail into wood makes the nail warmer. Consider a 5-gram steel nail 6-cm long and a hammer that exerts an average force of 500-N on the nail when it is being driven into the wood. What is the increase in the nail’s temperature if the specific heat capacity of steel is 450 J/kgˑC° using this formula: Work is given by F X d, and temperature change as Q = cm ∆T. (Hint: convert the unites to more manageable amounts).
2/ Using the formula: Power = Current X Voltage, find the current drawn by a 1200-W hair dryer connected to 120V.
3/ Two point charges are separated by 6cm. The attractive force between them is 20 N. What is the force between them when they are separated by 12cm? (Hint: This involves relative distance only).
4/ Find the voltage change when an electric field does 12 J of work on a charge of 0.0001C.
5/ Find the voltage change when an electric field does 24 J of work on a charge of 0.0002C.
6/ If a red-hot nail is immersed in warm water, the direction of heat flow will be from the
Thank you so much in advance!
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