Q2:- A sphere made of pure copper, which is 13 mm in diameter, is 70 °C (at t=0) when it inserted into a gas having a temperature of 25 °C. After 65 s the temperature of the sphere reach 60 °C. Make the appropriate assumption to find the heat transfer coefficient of the gas. What is the temperature of the sphere after 80 s. (A;=TT D², V= D³/6, Lc=V/ A)

A::V Gmail > A docs.google.com EE Q 3: A tank filled with oil,lf the total weight is(2 KN) and weight of tank only is (200 N) and volume of the tank is (190 L) , Find : Mass density ,specific weight ,specific gravity ,specific volume for the oil. 0.947 KN/m3,9.6534 kg/m3 , 0.01035 m3/kg , 9.65 94.7 KN/m3 ,96.534 kg/m3 , 0.01035 m3/kg , 1.965 9.47 KN/m3 ,965.34 kg/m3 , 0.01035 m3/kg , 0.965 Page 2 of 2 Back Submit Never submit passwords through Google Forms. This form was created inside of Mustansiriyah University. Report Abuse Google Forms

Number 16

A hot water leak in one of the faucets of your apartment can be very wasteful. A continuous leak of one quart per hour​ (a "slow"​ leak) at 155 degrees°F causes a loss of 1.81 million Btu per year. Suppose your water is heated with electricity. a. How many pounds of coal delivered to your electric utility does this leak equate to if one pound of coal contains 12,000 Btu and the boiler combustion process and water distribution system have an overall efficiency of 28​%? b. If a pound of coal produces 1.81 pounds of CO2 during the combustion​ process, how much extra carbon dioxide does the leaky faucet produce in a​ year

Give True or False for the following: 1.In liquids and gases, heat transmission is caused by conduction and convection 2.The surface geometry is the important factor in convection heat transfer 3. The heat transfer by conduction from heated surface to the adjacent layer of fluid, 4. The heat transfer is increased in the fin when &> 1 5.The unit of the thermal diffusivity is m²/s 6. Temperature change between the materials interfaces is attributed to the thermal contact resistance 7. A material that has a low heat capacity will have a large thermal diffusivity. 8. Heat conduction flowing from one side to other depends directly on thickness 9.Fin efficiency is the ratio of the fin heat dissipation with that of no fin 10.The critical radius is represented the ratio of the convicted heat transfer to the thermal conductivity

Example(1-13): steam and water flow through 75 mm inside diameter pipe at flow rate of 0.05 and 1.5 m³/s respectivily. If the mean temperature and pressure are 330 K and 120 kpa, what is the pressure drop per unit length of pipe. Where the pipe roughness 0.00015 mm, liquid and gas viscosities are 0.52x10³ pa.s and 0.0133x10-³ pa.s.

2 PARTs (A &B)- SOLVE CAREFULLY!! Please Write Clearly and Box the final Answer(s) ( Use images Below - Pay attention to numbers given)

For the system: x:(t) f(t) M1 surface friction - f, = 6.0 Nm/s Find an equation that relates settling time of the velocity of the mass to M. b. Find an equation that relates rise time of the velocity of the mass to M.