3. A string 4 mm in diameter has original length 2 m. A force of 200 N pulls the string. If the final length of the spring is 2.02 m, determine: (a) stress (b) strain (c) Young's modulus. (2 marks)

FP HYDR A bomb calorimeter, or a constant volume calorimeter, is a device often used to determine the heat of combustion of fuels and the energy content of foods. Ignition wires heat sample esc Water Stirrer Insulated Sample Burning Steel outside dish sample bomb chamber Combustion (bomb) calorimeter. In an experiment, a 0.6087 g sample of 2-naphthylacetic acid ( C12H10 O2) is burned completely in a bomb calorimeter. The calorimeter is surrounded by 1.201 x 10³ g of water. During the combustion the temperature increases from 23.86 to 26.91 °C. The heat capacity of water is 4.184 J.g¹. °C-¹. Thermometer The heat capacity of the calorimeter was determined in a previous experiment to be 936.5 J. ˚C-¹. Assuming that no energy is lost to the surroundings, calculate the molar heat of combustion of 2-naphthylacetic acid based on these data. C12H10O2 (s) + (27/2)O₂(g) →→ 5H₂O(l) +12CO2 (g) + Energy Molar Heat of Combustion = FOT 2 W F2 #3 3 F3 E $ 4 kJ/mol DOO F4 R % 5 2 T MacBook Pro 6 F6 & 7…

1) a) An electric immersion heater rated at 100 W is used to heat up 10 kg of water initially at 20 Degrees Celsius. If any heat loss is ignored, how long does it take for the water to reach a temperature of 80 Degrees Celsius?  b) Now you cannot wait that long to take a warm shower and your patience is only 15 minutes. So, you decide to buy a new and more powerful heater. What should be the power of the heater?

data required mass of aluminum ly) Initial temp. of aluminum ('() volume of water (ML) initial temp. of water (C) final temp. of water ('() density of water 1 9/mL) specific heat of water (/g.c) calorimeter constant (/°C). specific heat of aluminum. vale Calalate the percent error_ 16.27 83.85 50.6 20.30 73.90 1.00 4.184 22.44 ㅗ 9.'0 2 actral specific heat of Al is 0.900 J 9:0 7.