37 Questions - All Questions Are Required
Score 1
2 A car's velocity decreases from 22.0 m/s...
Answers: 3
Physics, 22.06.2019 11:30
If forces acting on an object are unbalanced. true or false
Answers: 1
Physics, 23.06.2019 08:00
Athin electrical heater is inserted between a long circular rod and a concentric tube with inner and outer radii of 20 and 40 mm. the rod (a) has a thermal conductivity of ka = 0.15 w/(m*k), while the tube (b) has a thermal conductivity of kb = 0.8 w/(m*k) and its outer surface is subjected to convection with a fluid of temperature t= -15°c and heat transfer coefficient 60 w/(m2 *k). the thermal contact resistance between the cylinder surfaces and the heater is negligible. (a) determine the electrical power per unit length of the cylinders (w/m) that is required to maintain the outer surface of cylinder b at 15°c. (b) what is the temperature at the center of cylinder a?
Answers: 2
Physics, 23.06.2019 08:30
What is the electric potential at a distance of 1.2 m from a 7.5 µc point charge? 5.6 × 104 v 8.1 × 104 v 5.6 × 1010 v 8.1 × 1010 v
Answers: 1
Mathematics, 21.01.2020 13:31
Spanish, 21.01.2020 13:31
Biology, 21.01.2020 13:31
Mathematics, 21.01.2020 13:31
Mathematics, 21.01.2020 13:31
Mathematics, 21.01.2020 13:31
Mathematics, 21.01.2020 13:31
Mathematics, 21.01.2020 13:31
Mathematics, 21.01.2020 13:31
Mathematics, 21.01.2020 13:31