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Mechanical Engineering
Calculate the internal energy and enthalpy of 1kg air occupying 0.05m3 volume at 20 bars. If the internal energy is increased by 120 kJ as the air is compressed to 50 bars, calculate the new volume occupied by 1 kg of air.
Mechanical Engineering
An object starts from rest with an acceleration of 5m/s2 along a straight line. Find the speed and distance travelled after 6 seconds what use the average speed during those
6 seconds?
6 seconds?
Mechanical Engineering
A pickup truck moving at 34 m/sec must come to a stop in a distance of 196 meters to
avoid hitting a boulder that has fallen onto the road. How much time does the driver
have to avoid an accident?
avoid hitting a boulder that has fallen onto the road. How much time does the driver
have to avoid an accident?
Mechanical Engineering
A car travels a distance of 350 miles in 5.0 hours. Find its average speed.
Mechanical Engineering
Monod kinetics are considered in a CSTR with an organism growing with an initial substrate concentration of 50 g/l and kinetic parameters of Ks-2g/l and pmax 0.5 h. What would be the maximum dilution rate for 100% yield of biomass with maximum rate?
Mechanical Engineering
Tetrahymena thermophila protozoa have a minimum doubling time of 6.5 hours when grown using bacteria as the limiting substrate. The yield of protozoal biomass is 0.33 g per g of bacteria and the substrate constant is 12 mg/ L. The protozoa are cultured at steady state in a chemostat using a feed stream containing 10 g 1 of nonviable bacteria. What is the maximum dilution rate for operation of the chemostat?
Mechanical Engineering
In the analysis of unsteady flow, or transient flow, processes, the system is abandoned in favour of a control volume. Attention is given to a fixed region in space, not to a fixed mass in motion. The control volume, defined by an imaginary closed boundary, is set up to surround the equipment under study. Both mass and energy may cross the boundary.
What is the difference between Upright Cylindrical Vessel and Spherical Vessel?
Mechanical Engineering
A nationwide survey of 20,000 students by the university revealed that almost 78% disapprove of smoking. If 15 of these seniors are selected at random and asked their opinions are selected at random and asked their opinions, what is the probability that more than 11 but less than 14 disapprove of smoking? *
Mechanical Engineering
An ideal Stirling cycle cooler, using helium (considered ideal) as its working fluid, has a compression temperature Tc=32°C and an expansion temperature
has a compression temperature Tc=32°C and an expansion temperature
TE=-21°C.
If state 1, at the beginning of the compression, is defined with a volume V1=40
cm3 and a pressure P1=1.8 MPa, and state 2 is defined with a volume V2=33
cm3, what is the heat qE absorbed during the expansion process (in Joules)?
has a compression temperature Tc=32°C and an expansion temperature
TE=-21°C.
If state 1, at the beginning of the compression, is defined with a volume V1=40
cm3 and a pressure P1=1.8 MPa, and state 2 is defined with a volume V2=33
cm3, what is the heat qE absorbed during the expansion process (in Joules)?
Mechanical Engineering
Determine the volume occupied by 10 kg water at a pressure of 10 MPa and a temperature of (a)5"C, (b)200 "C, (c) 400 "C, (d)800 "C, (e) 1500 "C, and (f)-10 "C. Ans. (a)0.00996 m3 (b)0.0115 m3 (c) 0.2641 m3 (d)0.4859 m3 (e)0.8182 m3 (f)0.01089 m3
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#339914 on Dec 2023
#339914 on Dec 2023