1-a 4 hz continuous wave travels on a slinky.
if the wavelength is 0.5m, what is the speed of waves on the slinky in ms-1?
2-a wave with oscillations perpendicular to the direction of propagation is called:
3-the only way to make sound travel faster in air is to change the air's
4-what is the rms of a signal with the waveform?
v(t) = 20.5 sin(4t)
5-what is the peak to peak amplitude (in volts) of a signal with the waveform
v(t) = 20.5 sin(4t)
6-the wavelength of a 40 000 hz ultrasound wave is measured to be 0.868cm.
find the air temperature (in oc)
7-a wave travelling 80m/s has a wavelength of 3.2m.
what is the frequency of the wave in hz?

What is created when solids, liquids, an gases mix with one another

Power can be defined as a. the distance over which work was done. b. how much work can be done in a given time. c. all the work in an given area. d. the energy required to do work.

Steam is generated in a boiler of a cogeneration plant at 10 mpa and 450°c at a steady rate of 5 kg/s. in normal operation, steam expands in a turbine to a pressure of 0.5 mpa and is then routed to the process heater, where it supplies the process heat. steam leaves the process heater as a saturated liquid and is pumped to the boiler pressure. in this mode, no steam passes through a condenser, which operates at 20 kpa. (a) determine the power produced in the turbine and the rate at which process heat is supplied in this mode. (b) determine the power produced in the turbine and the rate of process heat supplied if only 60 percent of the steam is routed to the process heater and the remainder is expanded to the condenser pressure. (3.32 mw; 9.69 mw; 4.25 mw; 5.82 mw)