19. A stone is thrown vertically upward with an initial velocity of 10m/s in a diving cliff 27m above the water level. Determine the velocity of the stone as it hits the water. a. 23.0573m/s b. 24.7006m/s c. 24.3002m/s d. 25.0946m/s 20. An ideal gas enclosed in a 1.77ft rigid tank initially at 70°C and 0.93kg/cm?. Find the temperature in °C if the final pressure is 75 in Hg. a. 692.6699°C b. 682.2848°C c. 633.5381ºC d. 644.0674°C 21. The barometer of a mountain hiker reads 14.7psi at the beginning of a hiking trip and 12.6psi at the end. Neglecting the effect of altitude on local gravitational acceleration, determine the vertical distance climbed. Assume an average air density of 1.18 kg/m³. a. 1112.5067m b. 1229.6126m c. 1250.4535m d. 1190.9081m

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
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19. A stone is thrown vertically upward with an initial velocity of 10m/s in a diving cliff 27m above
the water level. Determine the velocity of the stone as it hits the water.
a. 23.0573m/s
b. 24.7006m/s
c. 24.3002m/s
d. 25.0946m/s
20. An ideal gas enclosed in a 1.77ft rigid tank initially at 70°C and 0.93kg/cm?. Find the
temperature in °C if the final pressure is 75 in Hg.
a. 692.6699°C
b. 682.2848°C
c. 633.5381°C
d. 644.0674°C
21. The barometer of a mountain hiker reads 14.7psi at the beginning of a hiking trip and 12.6psi
at the end. Neglecting the effect of altitude on local gravitational acceleration, determine the
vertical distance climbed. Assume an average air density of 1.18 kg/m³.
a. 1112.5067m
b. 1229.6126m
c. 1250.4535m
d. 1190.9081m
22. A bottle with a lid contains 0.0088kg of air at 65°C. If the volume of the air inside the bottle is
0.007m and the diameter of the lid is 0.35m, what will be the force required to close the lid?
a. 11.4714kN
b. 11.0385kN
c. 11.7382kN
d. 11.7035kN
23. Compute the probable density of a fluid inside a floating spherical balloon having a 2m diameter
if the tension in the balloon's tie rope is observed to be 2kgf. Assume that the density of air is
1.10kg/m³.
a. 0.7225kg/m³
b. 0.6225kg/m³
c. 0.7025kg/m³
d. 0.5848kg/m³
24. An empty flask has a mass of 48.283g and 48.612g when filled with acetone vapor at 80°C and
728mmHg. If the volume of the flask is 257.2mL, what is the molecular weight of the acetone?
a. 43.7497kg/kmol
b. 38.6978kg/kmol
c. 42.4760kg/kmol
d. 43.8075kg/kmol
25. Three (3) adjacent bodies whose initial temperatures are 150°F, 350ºF and 60ºF have specific
heats of 2lb-ft/lb-°R, 4lb-ft/lb-ºR and 3.5lb-ft/lb-°R respectively. They are all placed inside a closed
adiabatic (perfectly insulated) container until the equilibrium condition. If the first two (2) objects
have a masses of 5lb, 3lb respectively, determine the mass of the 3rd body if the equilibrium
temperature is attained at 87.2°F
a. 39.22081b
b. 41.4787lb
c. 42.8977lb
d. 39.7227lb
Transcribed Image Text:19. A stone is thrown vertically upward with an initial velocity of 10m/s in a diving cliff 27m above the water level. Determine the velocity of the stone as it hits the water. a. 23.0573m/s b. 24.7006m/s c. 24.3002m/s d. 25.0946m/s 20. An ideal gas enclosed in a 1.77ft rigid tank initially at 70°C and 0.93kg/cm?. Find the temperature in °C if the final pressure is 75 in Hg. a. 692.6699°C b. 682.2848°C c. 633.5381°C d. 644.0674°C 21. The barometer of a mountain hiker reads 14.7psi at the beginning of a hiking trip and 12.6psi at the end. Neglecting the effect of altitude on local gravitational acceleration, determine the vertical distance climbed. Assume an average air density of 1.18 kg/m³. a. 1112.5067m b. 1229.6126m c. 1250.4535m d. 1190.9081m 22. A bottle with a lid contains 0.0088kg of air at 65°C. If the volume of the air inside the bottle is 0.007m and the diameter of the lid is 0.35m, what will be the force required to close the lid? a. 11.4714kN b. 11.0385kN c. 11.7382kN d. 11.7035kN 23. Compute the probable density of a fluid inside a floating spherical balloon having a 2m diameter if the tension in the balloon's tie rope is observed to be 2kgf. Assume that the density of air is 1.10kg/m³. a. 0.7225kg/m³ b. 0.6225kg/m³ c. 0.7025kg/m³ d. 0.5848kg/m³ 24. An empty flask has a mass of 48.283g and 48.612g when filled with acetone vapor at 80°C and 728mmHg. If the volume of the flask is 257.2mL, what is the molecular weight of the acetone? a. 43.7497kg/kmol b. 38.6978kg/kmol c. 42.4760kg/kmol d. 43.8075kg/kmol 25. Three (3) adjacent bodies whose initial temperatures are 150°F, 350ºF and 60ºF have specific heats of 2lb-ft/lb-°R, 4lb-ft/lb-ºR and 3.5lb-ft/lb-°R respectively. They are all placed inside a closed adiabatic (perfectly insulated) container until the equilibrium condition. If the first two (2) objects have a masses of 5lb, 3lb respectively, determine the mass of the 3rd body if the equilibrium temperature is attained at 87.2°F a. 39.22081b b. 41.4787lb c. 42.8977lb d. 39.7227lb
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