subject
Engineering, 07.10.2019 17:30 mandylo5418

Place test tubes containing approximately equal volumes in opposite positions on the rotor. wait until all positions on the rotor contain a test tube before activating the centrifuge. never put stoppers or other items in the centrifuge with your tubes. carefully stopper the test tubes to ensure the liquids do not spill out. (b) when operating the centrifuge, students should do which of the following? make sure that the lid is completely shut and the safety knob is turned to engage the safety switch. centrifuge for approximately 30 minutes. centrifuge for approximately 30 seconds. mid-way through the process, open the lid of the centrifuge and check to be sure it is operating. (c) when the centrifuge process is complete, students should do which of the following? wait for the rotor to come to a complete stop before attempting to remove your test tubes. using the eyehole on top, monitor the spinning rate and open the lid only after the rotor has slowed significantly. immediately open the lid of the centrifuge to remove the test tubes before they are damaged. reach out and carefully slow the rotor with your hand so you may finish the lab faster.

ansver
Answers: 2

Another question on Engineering

question
Engineering, 03.07.2019 14:10
Amass of m 1.5 kg of steam is contained in a closed rigid container. initially the pressure and temperature of the steam are: p 1.5 mpa and t 240°c (superheated state), respectively. then the temperature drops to t2= 100°c as the result of heat transfer to the surroundings. determine: a) quality of the steam at the end of the process, b) heat transfer with the surroundings. for: p1.5 mpa and t 240°c: enthalpy of superheated vapour is 2900 kj/kg, specific volume of superheated vapour is 0. 1483 m/kg, while for t 100°c: enthalpy of saturated liquid water is 419kj/kg, specific volume of saturated liquid water is 0.001043m/kg, enthalpy of saturated vapour is 2676 kj/kg, specific volume of saturated vapour is 1.672 m/kg and pressure is 0.1 mpa.
Answers: 3
question
Engineering, 04.07.2019 18:10
Water in a partially filled large tank is to be supplied to the roof top, which is 8 m above the water level in the tank, through a 2.2-cm-internal-diameter pipe by maintaining a constant air pressure of 300 kpa (gage) in the tank. if the head loss in the piping is 2 m of water, determine the discharge rate of the supply of water to the roof top in liters per second.
Answers: 3
question
Engineering, 04.07.2019 18:10
Hydraulic fluid with a sg. of 0.78 is flowing through a 1.5 in. i.d. pipe at 58 gal/min. the fluid has an absolute viscosity of 11.8 x 105 lbf-sec/ft2. is the flow laminar, turbulent or within the critical range? give both a numerical reynolds number and a term answer.
Answers: 3
question
Engineering, 04.07.2019 18:10
Which of the following ziegler nichols tuning methods the response of the controller to a step input should exhibit an s-shaped curve? a)-open loop mode b)-closed loop mode c)-both modes (open & closed) d)-none of the modes (open & closed)
Answers: 3
You know the right answer?
Place test tubes containing approximately equal volumes in opposite positions on the rotor. wait unt...
Questions
question
Computers and Technology, 13.12.2021 01:50
question
Mathematics, 13.12.2021 01:50
question
Mathematics, 13.12.2021 01:50
question
Mathematics, 13.12.2021 01:50
question
Mathematics, 13.12.2021 01:50
Questions on the website: 13722367