Physical Science
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1 1.3.2 Test (CST): Science and Engineerin...
Engineering, 17.10.2020 21:01 yasmimyamamoto2015
Physical Science
Apex Learning
A
1 1.3.2 Test (CST): Science and Engineering
Question 3 of 25
Which two explanations are based on personal beliefs?
I A. Certain mineral crystals have properties that help protect the
body from illness.
B. A constellation's position in the night sky can be used to predict
events in a person's life.
O c. Medical data gathered over many years show that lack of
adequate sleep causes health problems.
O D. Data gathered during experiments show that there is an inverse
relationship between the force of gravity and distance.
O E. Observations using microscopes reveal that all known organisms
are composed of tiny structures called cells.
Answers: 2
Engineering, 04.07.2019 18:10, heidiburgos1own6c0
Fluids at rest possess no flow energy. a)- true b)- false
Answers: 3
Engineering, 04.07.2019 18:10, keigleyhannah30
Aplate clutch has a single pair of mating friction surfaces 250-mm od by 175-mm id. the mean value of the coefficient of friction is 0.30, and the actuating force is 4 kn. a) find the maximum pressure and the torque capacity using the uniform-wear model. b) find the maximum pressure and the torque capacity using the uniform-pressure model.
Answers: 3
Engineering, 04.07.2019 18:10, lillygrl100
For the closed feedwater heater below, feedwater enters state 3 at a pressure of 2000 psia and temperature of 420 °f at a rate of ix10 ibhr. the feedwat extracted steam enters state 1 at a pressure of 1000 psia and enthalpy of 1500 btu/lbm. the extracted er leaves at an enthalpy of 528.7 btu/lbm steam leaves as a saturated liquid. (16) a) determine the mass flow rate of the extraction steam used to heat the feedwater (10) b) determine the terminal temperature difference of the closed feedwater heater
Answers: 3
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