Engineering, 18.03.2021 16:50 tiwaribianca475
A student investigates how the concentration of an acid affects the speed of the reaction with a 0.5g mass of magnesium at 30°C.
the student has a beaker, concentrated acid, water and the apparatus below:
P. a balance
Q. a clock
R. a measuring cylinder
S. a thermometer
which pieces of apparatus does the student use?
A. P, Q & R only
B. P, Q & S only
C.
Answers: 3
Engineering, 04.07.2019 18:10, viicborella
Steel is coated with a thin layer of ceramic to protect against corrosion. what do you expect to happen to the coating when the temperature of the steel is increased significantly? explain.
Answers: 1
Engineering, 04.07.2019 18:10, DestyHilBan1183
Adouble-strand no. 60 roller chain is used to transmit power between a 13-tooth driving sprocket rotating at 300 rev/min and a 52-tooth driven sprocket. a) what is the allowable horsepower of this drive? b) estimate the center-to-center distance if the chain length is 82 pitches. c) estimate the torque and bending force on the driving shaft by the chain if the actual horsepower transmitted is 30 percent less than the corrected (allowable) power.
Answers: 3
Engineering, 04.07.2019 18:20, 21megoplin
How much power could a wind turbine produce if it had the following specifications? cp = 0.45 -d=1.2kg/m3 d=50m v 5m/s
Answers: 2
Engineering, 04.07.2019 18:20, xcapo1x
Refrigerant-134a enters the compressor of a refrigerator as superheated vapor at 0.14 mpa and -10°c at a rate of 0.05 ka/s and leaves at 0.8 mpa and 50°c. the refrigerant is cooied in the condenser to 0.72 mpa and 26'c. it is then throttled to 0.15 mpa. sketch the t-s diagram for the system and evaluate: 6) the rate of heat removai from the refrigerated space (kw), it) the power input to the compressor (kw), ii) the isentropic efficiency of the compressor (%), and iv) the cop of the refrigerator.
Answers: 2
A student investigates how the concentration of an acid affects the speed of the reaction with a 0.5...
Social Studies, 07.10.2021 14:00
Computers and Technology, 07.10.2021 14:00
Social Studies, 07.10.2021 14:00
Mathematics, 07.10.2021 14:00
Biology, 07.10.2021 14:00