Physics, 11.10.2019 07:30 kseniyayakimov
A60-vibration-per-second wave travels 30 meters in 1 second. its frequency isa) 30 hertz and it travels at 60 m/s. b) 60 hertz and it travels at 30 m/s. c) 1800 hertz and it travels at 2 m/s.
Answers: 3
Physics, 22.06.2019 18:00
Consider two regions of space containing a static electric field, region a and region b. in region a the equipotential lines are more closely spaced than those in region b. what can be said about the relative strength of the electric field in the two regions? a) the electric field in region a is stronger th
Answers: 3
Physics, 22.06.2019 18:30
Arailroad car collides with and sticks to an identical railroad car that is initially at rest. after the collision, the total kinetic energy of the two cars is a) the same as before. b) half as much as before. c) one third as much as before. d) one fourth as much as before. e) twice as much as before.
Answers: 1
Physics, 22.06.2019 18:50
8.29 two streams containing pyridine and acetic acid at 25°c are mixed and fed into a heat exchanger. due to the heat-of-mixing effect, it is desired to reduce the temperature after mixing to 25°c using a stream of chilled ethylene glycol as indicated in the diagram. calculate the mass flow rate of ethylene glycol needed. the heat capacity of ethylene glycol at these conditions is approximately 2.8 kj/(kg k), and the enthalpy change of mixing (δmixh) is given below.
Answers: 3
A60-vibration-per-second wave travels 30 meters in 1 second. its frequency isa) 30 hertz and it trav...
Physics, 17.12.2019 23:31
Mathematics, 17.12.2019 23:31