7. Which of the following has the most total mechanical energy?
a. An airplane flying
b. A bi...
Answers: 2
Physics, 22.06.2019 05:30
Astudent pushes on a 20.0 kg box with a force of 50 n at an angle of 30° below the horizontal. the box accelerates at a rate of 0.5 m/s2 across a horizontal floor. what is the value of the normal force on the box? 200 n 243 n 156 n 225 n
Answers: 2
Physics, 22.06.2019 12:00
Selma made a diagram to compare convection and radiation. which label belongs in the area marked x? must involve temperature differences between substances or objects only occurs when molecules are in direct contact involves the movement of fluids based on density differences can occur where there is little or no matter
Answers: 1
Physics, 22.06.2019 18:00
Air enters a gas turbine with two stages of compression and two stages of expansion at 100 kpa and 17°c. this system uses a regenerator as well as reheating and intercooling – the intercooler returns the air to the inlet temperature. the pressure ratio across each compressor is 4 ; 300 kj/kg of heat are added to the air in each combustion chamber; and the regenerator operates perfectly while increasing the temperature of the cold air by 20°c. determine the system’s thermal efficiency. assume isentropic operations for all compressor and the turbine stages and use constant specific heats at room temperature. (0.378)
Answers: 3
Physics, 22.06.2019 19:00
Achild has maximum walking speed of 1.6 m/s. what is the length of the child's legs? 0.26 m
Answers: 2
Mathematics, 11.03.2021 01:00
History, 11.03.2021 01:00
Biology, 11.03.2021 01:00
Mathematics, 11.03.2021 01:00
Mathematics, 11.03.2021 01:00
Mathematics, 11.03.2021 01:00
Mathematics, 11.03.2021 01:00
Mathematics, 11.03.2021 01:00
Mathematics, 11.03.2021 01:00
Mathematics, 11.03.2021 01:00
Mathematics, 11.03.2021 01:00
Mathematics, 11.03.2021 01:00
History, 11.03.2021 01:00
Biology, 11.03.2021 01:00