ENGR 103 FINAL EXAM WITH
COMPLETE SOLUTION
A ladder leans against a building. The base of the ladder is 6 feet located
from the building. The ladder reaches a vertical height of 15 feet on the
building. What is the length of the ladder? - ANSWER 16 Feet
A cube has a side length of 10.5 m. What is the length of the diagonal from
the bottom front left hand corner to the top back right corner - ANSWER
18.2 m
Convert 6840 kcal/cm^3 to Btu/ft^3 - ANSWER 7.69*10^8 Btu/ft^3
Convert 52.0 mph to mm/s - ANSWER 2.32*10^4 mm/s
Which of the following is correct (true) with respect to dimensions?
A. The 7 fundamental dimensions are meter, second, kilogram, Celsius, mole,
ampere, and Candela.
B. Dimensions and units are synonymous terms in science and engineering .
C. The use of dimensions comes from uncertainty in engineering
measurements used to make calculations.
D. Two terms can be multiplied even if they are not dimensionally
homogeneous.
E. If two terms in an expression have the same dimensions, they must have
the same units. - ANSWER D. Two terms can be multiplied even if they are
not dimensionally homogeneous.
,What must the dimensions of a and k be in order to make equation
4M^3L^-2T=asin(kT^-2M) dimensionally homogeneous? - ANSWER
a=M^3L^-2T^1
k=T^2M^-1
T/F The equation
R=(8u^2l)/(pi*r^3)
is dimensionally homogenous when given the following units for the
variables.
R=kg/m^4*s
u=g/cm*s
l=ft
r=in - ANSWER False
How many significant figures are in the number 0.002? - ANSWER One
How many significant figures are in the number 10.00? - ANSWER Four
How many significant figures are in the answer to 12.01 divided 2? - ANSWER
One
Which skill in the list should students expect from this class, based on the
lectures to date?
A. Proficiency in AutoCAD
B. Learning to differentiate multivariable terms
C. Learning to formulate math
, models of physical things to predict behavior.
D. Elementary Statistical analysis
E. Determining thermal equilibrium for conduction. - ANSWER C. Learning to
formulate math models of physical things to predict behavior
Convert 43,836 Pascals to units of atm. - ANSWER 0.43263
The cross sectional area of the beam is 480 sq in. What is its cross-sectional
are in sq meters? Use engr sig figs for rounding. - ANSWER 3.10*10^-1 sq
meters
An object has a mass of 5.39 slugs. What is its weight on earth in units of lbf
(g=32.2 ft/s^2)? - ANSWER 1.74*10^2 lbf
Convert 83 (kg*m^3)/s to (g*cm^2)/s - ANSWER 8.3 * 10^10 (g*cm^2)/s
What conversion factor converts force to mass? - ANSWER Force cannot be
converted to mass.
An average female chimpanzee weighs 388 N. How much mass does she
have? - ANSWER 39.6 kg
The Philae Lander recently set down on comet 67P Churyumov-Gerasimenko.
Its launch weight (weight on earth) is 220 lbf. How much does it weigh on
comet 67P? (the average acceleration of gravity on comet i67P, g, is
1.64*10^-3 ft/s^2 ) - ANSWER 0.0112 lbf
What is not true about technical sketching?
A. Sketching is usually done freehand
B. You must use drafting tools (or a computer program) for sketching
COMPLETE SOLUTION
A ladder leans against a building. The base of the ladder is 6 feet located
from the building. The ladder reaches a vertical height of 15 feet on the
building. What is the length of the ladder? - ANSWER 16 Feet
A cube has a side length of 10.5 m. What is the length of the diagonal from
the bottom front left hand corner to the top back right corner - ANSWER
18.2 m
Convert 6840 kcal/cm^3 to Btu/ft^3 - ANSWER 7.69*10^8 Btu/ft^3
Convert 52.0 mph to mm/s - ANSWER 2.32*10^4 mm/s
Which of the following is correct (true) with respect to dimensions?
A. The 7 fundamental dimensions are meter, second, kilogram, Celsius, mole,
ampere, and Candela.
B. Dimensions and units are synonymous terms in science and engineering .
C. The use of dimensions comes from uncertainty in engineering
measurements used to make calculations.
D. Two terms can be multiplied even if they are not dimensionally
homogeneous.
E. If two terms in an expression have the same dimensions, they must have
the same units. - ANSWER D. Two terms can be multiplied even if they are
not dimensionally homogeneous.
,What must the dimensions of a and k be in order to make equation
4M^3L^-2T=asin(kT^-2M) dimensionally homogeneous? - ANSWER
a=M^3L^-2T^1
k=T^2M^-1
T/F The equation
R=(8u^2l)/(pi*r^3)
is dimensionally homogenous when given the following units for the
variables.
R=kg/m^4*s
u=g/cm*s
l=ft
r=in - ANSWER False
How many significant figures are in the number 0.002? - ANSWER One
How many significant figures are in the number 10.00? - ANSWER Four
How many significant figures are in the answer to 12.01 divided 2? - ANSWER
One
Which skill in the list should students expect from this class, based on the
lectures to date?
A. Proficiency in AutoCAD
B. Learning to differentiate multivariable terms
C. Learning to formulate math
, models of physical things to predict behavior.
D. Elementary Statistical analysis
E. Determining thermal equilibrium for conduction. - ANSWER C. Learning to
formulate math models of physical things to predict behavior
Convert 43,836 Pascals to units of atm. - ANSWER 0.43263
The cross sectional area of the beam is 480 sq in. What is its cross-sectional
are in sq meters? Use engr sig figs for rounding. - ANSWER 3.10*10^-1 sq
meters
An object has a mass of 5.39 slugs. What is its weight on earth in units of lbf
(g=32.2 ft/s^2)? - ANSWER 1.74*10^2 lbf
Convert 83 (kg*m^3)/s to (g*cm^2)/s - ANSWER 8.3 * 10^10 (g*cm^2)/s
What conversion factor converts force to mass? - ANSWER Force cannot be
converted to mass.
An average female chimpanzee weighs 388 N. How much mass does she
have? - ANSWER 39.6 kg
The Philae Lander recently set down on comet 67P Churyumov-Gerasimenko.
Its launch weight (weight on earth) is 220 lbf. How much does it weigh on
comet 67P? (the average acceleration of gravity on comet i67P, g, is
1.64*10^-3 ft/s^2 ) - ANSWER 0.0112 lbf
What is not true about technical sketching?
A. Sketching is usually done freehand
B. You must use drafting tools (or a computer program) for sketching
