Physical science
Can someone help me with this
...
Answers: 1
Physics, 22.06.2019 15:30
Two pans of a balance are 24.1 cm apart. the fulcrum of the balance has been shifted 1.33 cm away from the center by a dishonest shopkeeper. by what percentage is the true weight of the goods being marked up by the shopkeeper? assume the balance has negligible mass. answer in units of %.
Answers: 1
Physics, 22.06.2019 17:30
Convection currents are caused by differences in what two things?
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
Chemistry, 30.10.2019 02:31
Mathematics, 30.10.2019 02:31
Mathematics, 30.10.2019 02:31
Mathematics, 30.10.2019 02:31
Medicine, 30.10.2019 02:31
Mathematics, 30.10.2019 02:31
Mathematics, 30.10.2019 02:31
Mathematics, 30.10.2019 02:31
Social Studies, 30.10.2019 02:31
Mathematics, 30.10.2019 02:31