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WorksheetsESAS Coaching Set 1
Total questions: 150
Worksheet time: 1hrs 15mins
When engineer enters management, what is the most likely problem he finds difficult to acquire?
Learning how to take satisfaction in the work of others
Learning how to work through others
All of the above
Learning to trust others
For a fluid, viscosity is defined as the constant of proportionality between shear stress and what other variable?
the time derivative of density
the spatial derivative of velocity
the spatial derivative of density
the time derivative of pressure
For completely corrosion resistant stainless steel, what minimum percentage of chromium in the alloy is required?
1.1%
15%
11%
3.2%
Which of the following statements about work for a quasi-equilibrium process is incorrect?
The differential work is inexact
Work is area under a P-T diagram
Work is always zero for a constant-volume process
Work is a path function
Which of the following corresponds to the meaning of annuity?
A series of uniform amounts over a period of time.
The future worth of a present amount.
An annual repayment of the loan.
A lump sum at the end of the year.
A tire 0.500 m in radius rotates at a constant rate of 200 rev/min. Find the inward acceleration (m/s2) of a small stone lodged in the tread of the tire (on its outer edge).
110
214
130
219
Modulus of rigidity is also known as
Modulus of elasticity
Bulk modulus
Young's modulus
Shear modulus
What is the charge of oxygen ion in CaO?
-1
+2
+1
-2
Which of the following formula is CORRECT for temperature conversion?
Tf = 5/9 Tc + 32
Tf = 9/5 Tc + 32
Tf = 9/5 Tc - 32
Tf = 5/9 Tc - 32
HTTP:// is an identifier that appears at the beginning of most Webpage. What does HTTP stands for?
Hypertext Transmission Process
Hypertext Transfer Protocol
Hypertext Time Protocol
Hypertime Text Protocol
The passing general weighted average rating for the licensure examination for Registered Electrical Engineers must be 70% with NO GRADE below____ in any subjects in Mathematics, ESAS, and Electrical Engineering as required under Section 19(b) of RA 7920.
65%
55%
60%
50%
What color is used to designate caution limited to warning against starting, use of, or movement of equipment which are under repair or being worked upon?
Yellow
Green
Red
Blue
What refers to ions that are NOT involved in the overall reactions?
Guest Ions
Spectator ions
Special ions
Extra ions
What form of software can also be called firmware?
System BIOS
random memory
cache memory
operating system
What is the standardized communication technique for expressing instructions to a computer?
programming language
algorithm
flow chart
logic
The electric power industry shall be divided into four (4) sectors, namely: generation, distribution, transmission and _________.
motor
load
plant
supply
What rate of interest compounded annually is the same rate of interest of 8% compounded quarterly?
8.12%
8.07%
8.16%
8.24%
Which of the following is the Ideal Gas Law?
V/T = k
P1/T1 = P2/T2
V = k x 1/P
PV = nRT
An unknown fuel has a mass density of 805 kg/m3. Find its specific gravity.
1.242
0.805
1.610
0.621
Which of the following metals has the highest specific heat capacity at 100 deg C?
iron
copper
silver
aluminum
What is the effective annual interest rate on a loan if the nominal interest rate is 12% per year compounded quarterly?
11.75 percent
12.25 percent
12.55 percent
12 percent
Consider a project that involves the investment of P 100,000 now and P 100,000 at the end of year 1. Revenues of P 150,000 will be generated at the end years 1 and 2. What is the MOST nearly the net present value of this project if the effective annual interest rate is 10%?
P 58,400
P 69,500
P 80,400
P 77,500
Which of the following principle of thermodynamics cycle that steam engine operates?
stirling
diesel
carnot
brayton
An AA 1.5 V battery typically has an internal resistance of 0.30 Ω. What is its terminal voltage V when it supplies 48 mA to a load?
1.53
1.49
1.45
1.40
An interest rate of 10% compounded semiannually is equivalent to how many percent compounded quarterly?
7.922%
10.852%
9.878%
8.901%
What does PRBEE stands for?
Philippine Regulating Board of Electrical Engineering
Professional Regulating Board of Electrical Engineering
Philippine Regulatory Board of Electrical Engineering
Professional Regulatory Board of Electrical Engineering
If P 300 is earned in three months in an investment of P 12000, what is the annual rate of simple interest?
14%
12%
10%
8%
What refers to any technique used either to minimize the probability of an accident or to mitigate its consequences?
Quality assurance management
Reliability management
Risk management
Project assurance management
What is the term for a deadlock situation that occurs when a program references a difference page for almost every instructions and there is NOT even enough real memory to hold MOST of the virtual memory?
Scanning
Thrashing
Paging
Handshaking
Pedro won Php 10,000,000 in the lottery. Unfortunately, the lottery commission will not pay Kiko the entire amount now. Instead, they will pay Kiko Php 500,000 each year for the next 20 years, starting at the end of the first year. What is the present worth of Pedro’s winnings? Assume a nominal annual interest rate of 10%.
PHP 4,256,782
PHP 5,000,000
PHP 867,769
PHP 3,547,318
A Carnot engine operates between 250˚F and 1200˚F. What is the thermal efficiency?
20.83%
57.23%
42.77%
79.17%
The test used to determine the chemical composition of coal is __________.
Ultimate Analysis
Proximate Analysis
Calorific Value Test
Coke Reactivity Test
What is the principle works in the hydraulic brakes of an automobiles?
Bernoulli's Law
Archimede's Principle
Pascal's Law
Posieuille's Law
Which of the following can be considered a control volume system?
Compression of air in a sealed balloon by squeezing
Expansion of gas cylinder after combustion
The Goodyear Blimp during flight
Filling a car tire with air at a service station
A new engine design incorporates a piston that contains 0.60 kg of steel (specific heat = 470 J/kg*K) and 1.20 kg of aluminium (specific heat = 910 J/kg*K). How much heat is required to raise the piston from an initial temperature of 20 degree C to its operating temperatures of 160 degree C?
205.520 kJ
198.84 kJ
192.36 kJ
185.78 kJ
What refers to the case hardening process by which the carbon content of the steel near the surface of a part is increased?
Normalizing
Martemoering
Annealing
Carburizing
IEEE 1284 is a standard that defines
Parallel communications
Series communications
Wireless network
Wired network
A person invests P 450 to be collected in 8 years. Given that the interest rate on the investment is 14.5% compounded annualy, most nearly what sum will be collected 8 years from now?
P 1,330
P 1,240
P 1,050
P 1,130
Pedro borrowed P20,000.00 from a bank with 15% interest compounded semi-annually, what is the total amount to be repaid at the end of two years?
P28,712.59
P24,845.94
P25,947.80
P26,709.38
Which of the following statements about work for a quasi-equilibrium process is incorrect?
Work is area under a P-T diagram
Work is a path function
Work is always zero for a constant-volume process
The differential work is inexact
The focal length on a camera with a zoom lens can vary from 35 mm to 120 mm. You photograph a very distant object 2 m tall, first using the 35 mm focal length and then using the 120 mm focal length. What is the approximate ratio of the sizes of the two images?
3.4
4.6
4.8
3.2
For a fluid, viscosity is defined as the constant of proportionality between shear stress and what other variable?
the time derivative of density
the spatial derivative of density
the spatial derivative of velocity
the time derivative of pressure
What is the MINIMUM size in mm required for stainless steel rod as grounding electrode?
16
13
10
12
Which of the following statement/s about sound is/are true? I.All sounds are produced by the vibration of bodies. II.Sound cannot travel through a vacuum. III.Sound can be transmitted through some material.
I and III
II and III
I, II, and III
I and II
Which are NOT included in the duties and responsibilities of PRBEE?
Perform such other functions and duties as may be necessary to implement effectivity of this Act.
All of these
Issue special permit to individual foreign electrical engineer and electrician for specific projects
Supervise and regulate the practice of electrical engineering in the Philippines
Noise above _____ over a prolonged period of time may start to damage your hearing.
100 dB
90 dB
70 dB
50 dB
Find the principal amount if the amount of interest at the end of two years is
P 4,000 for a simple interest of 6.25% per annum.
P 32,000
P 27,000
P 23,000
P 36,000
Materials in this group are composed of one or more metallic elements such as iron, aluminum, copper, titanium, gold, and nickel. What is this group called?
metals
metalloid
solids
crystals
How is “molarity” defined?
the number of moles of solute in 1 L of solution
the number of gram-equivalent weights of solute in L of solution
the number of gram-formula weights of solute per liter
the number of moles of solute in 1000 g of solvent
How long will it take for an investment of P 5000 to grow to P 7500, if it earns 10% simple interest per year?
7 years
6 years
5 years
4 years
What is BASIC stands for?
Beginner’s All-Purpose System Instruction Code
Beginner’s All-Purpose Symbolic Instruction Code
Basic All-Purpose System Instruction Code
Basic All-Purpose Symbolic Instruction Code
Find the principal amount if the amount of interest at the end of two years is P 4,000 for a simple interest of 6.25% per annum.
P 27,000
P 36,000
P 23,000
P 32,000
The fastest method for transferring data from one register to another is the
FIFO
serial transfer
hybrid transfer
parallel transfer
Determine the atmospheric pressure (in kPa) at a location where the barometric reading is 740 mm Hg and the gravitational acceleration is g = 9.81 m/sec squared. Assume the temperature of mercury to be 10 deg C, at which its density is 13,570 kg/cu. m.
89.47
98.51
99.82
111.58
What physical property of a material that refers to the point at which a material liquefies on heating or solidifies on cooling?
Melting point
Refractive index
Specific heat
Curie Point
A disconnecting means shall be located within sight from the motor controller.
wiring design rule
installation rule
construction rule
manufacturing rule
If P 500 is invested at the end of each year for 6 year at an effective annual interest rate of 7%, what is MOST nearly the total peso amount available upon the deposit of sixth payment?
P 4,260
P 3,580
P 3,210
P 3,000
In the periodic table of elements, which ONE of the following is light metal?
Mercury
Silver
Gold
Potassium
Which of the following is correct when a vapor condense to a liquid?
Its temperature rises.
Its temperature fall.
It gives off internal energy.
Its internal energy increases.
When we observe objects in the water, they appear to be much closer to the surface than they really are. A coin is placed at the bottom of a beaker containing water (n=1.33) and benzene (n=1.5) respectively one above the other. If the depth of the water is 10 cm, while benzene has a depth of 6 cm, what is the height at which the image of the coin will appear?
12.5
11.5
10.5
10
According to RA 7920 the members of the BEE shall hold office for a term of years from the date of appointment or until their successors shall have been appointed and qualified.
2
3
4
5
NGCP warns _____ alert if tropical disturbance within 24 hours.
weather disturbance
red
blue
yellow
What is the octal equivalent of the hexadecimal number EE?
536
823
356
238
If the shear stress in a fluid varies linearly with the velocity gradient, which of the following describes the fluid?
It is at constant temperature
It is inviscid
It is a Newtonian Fluid
It is a perfect gas.
Find the principal amount if the amount of interest at the end of two years is P 4,000 for a simple interest of 6.25% per annum.
P 27,000
P 36,000
P 32,000
P 23,000
Which of the following is the best project management tool to use to determine the longest time the project will take?
Bar chart
Project charter
Network diagram
Work breakdown structure
When installing the heatsink back into a computer after replacing a failed processor, which of the following must be done during installation?
Thermal compound must be installed between the processor and the heatsink.
Thermal compound must be installed between the processor and the system board.
An isopropyl alcohol pad must be placed between the processor and the system board.
An isopropyl alcohol pad must be placed between the processor and the heatsink.
A vertically loaded beam, fixed at one end and simply supported at the other is indeterminate to what degree?
second
fourth
third
first
Which of the following is TRUE for a propeller-type impeller centrifugal pump?
The head developed is due to the action of centrifugal force.
The head developed is due to the rotation of the impeller.
The head developed is due to the push of the vanes and flow is almost entirely axial.
The head developed cannot be determined by the rotation of the vanes.
What is the present worth of two P100 at the end of the third and fourth year if the annual interest rate is 8%?
153
122
162
160
What is a system or circuit conductor that is intentionally grounded based on
PEC I?
Grounding Electrode
Equipment Grounding Conductor
Grounded Conductor
Neutral Conductor
A metal bar 40 mm x 40 mm is loaded with a compressive force of 485 kN. The nominal length of 200 mm is compressed by 0.4 mm and the thickness increased by 0.04 mm. What is the Poisson’s ratio?
1
3
2
2.5
For which of the following is the Program Evaluation and Review Technique (PERT) not used?
Preparation of bids and proposals
Computer programming assignments
Queueing problems
Construction projects
What can you say about the following statement regarding centrifugal pumps? “The discharge of the centrifugal pumps can be throlled without the building up of an excessive pressure or overloading its driving unit.” I. True II. False
Both I and II
II
I
Either I or II
How much should you put into a 7.9% savings account in order to have $ 175,000 in 63 years?
$1,454.41
$1,342.21
$1,541.44
$1,356.32
The mole is a basic unit of measurement in chemistry. Which of the following is not equal to or the same as one mole of the substance indicated?
16 g of oxygen molecules
1 g of hydrogen atoms
22.4 liters of nitrogen gas at STP
6.02x10^23 oxygen molecules
What is the standard color for safety signages to indicate the presence of radiation hazards example in the X-ray laboratory in the hospital?
Orange
Purple with combination of yellow
Green with combination of red
Blue
A megabyte is exactly _____ bytes
1,084,567
999,999
1,000,000
1,048,576
Which is more desirable? I. Investing P 2000 at 6% per year compounded interest for three years. II. Investing P 2000 per year simple interest for three years.
Either I or II
Both I and II
II
I
What is the equivalent unit of “pascal”?
N/m
N-m2
N-m
N/m2
How many electrons flow through a light LED bulb each second if the current through the light LED bulb is 0.75 A?
6.5 x 10^18
5.6 x 10^18
4.7 x 10^18
7.4 x 10^18
What is the maximum moment of a beam supported at both ends and carries a uniform load of w throughout its entire length?
wL2/4
wL/2
wL2/8
wL/8
What is the present value of P 10000 to be received 20 years from now, if the principal is invested at 8% per year compounded annually?
P 2387.34
P 2546.32
P 2743.21
P 2145.48
What is the weight percent of engineering sciences and allied subjects?
45
40
25
30
A current of 7 A passes through a 12 ohm resistor. What is the power dissipated in the resistor in horsepower/s?
0.79
84
588
0.59
An 8 ft long pendulum subtends an angle of 340. What is the height difference from its stationary position?
1.54
1.86
1.62
1.37
In a certain experiment, argon effuses from a porous cup at 4.0mmol/min. How fast would chlorine effuse under the same conditions?
3 mmol/min
6 mmol/min
4 mmol/min
5 mmol/min
Add 23 base 10 to 45 base 8. Express the answer in decimal.
60
59
68
65
Formula for calcium chloride.
Ca2Cl
CaCl3
CaCl2
CaCl
Where do stress concentrations occur? I. near the points of application of concentrated loads II. Along the entire length of high distributed loads III. At discontinuities
II and III
I and III
I, II, and III
I and II
What does R.A. 9136 stand for?
Electrification Power Reform Act of 2001
Energization Power Reform Act of 2001
Electric Power Industry Reform Act of 2001
Energy Power Reform Act of 2001
A bar of uniform cross section is subject to a uniaxial tension and develops a strain in the direction of the force of 1/800. Calculate the change of volume per unit volume. Assume μ = 1/3.
1/1200 (inc)
1/2400 (inc)
1/2400 (dec)
1/1200 (dec)
Republic Act No._____. An act strengthening compliance with occupational safety and health standards (OSHS) and providing penalties for violations thereof.
11058
1012
11508
1210
What is a computer programming language in which groups of 1s and 0s are used to represent instructions and the only language a computer actually understood?
MS DOS
FORTRAN
Application software
Machine language
Which of the following CORRECTLY describes atoms located at grain boundaries?
They are subjected to the same type of interatomic forces that are present in the interior atoms of the crystal.
All of these are correct.
They are located primarily in highly strained and distorted positions.
They have a higher free energy than atoms in the undisturbed part of the crystal lattice.
Which of the following technique a manager must use if he decides to absorb the risk in the project?
Create buffer in the form of management reserve or extra time in schedule
Buying insurance
Use a different supplier
Use a different technology
A 1.2 IF capacitor is charged 3 KV. What is the stored energy in the capacitor?
7.6 J
5.4 J
4.5 J
6.7 J
Find the present worth of a 5 years annuity paying PhP 3,000.00 at the end of each year, with interest at 6% compounded annually.
PhP 14,743.27
PhP 13,479.56
PhP 12,637.09
PhP 12,215.85
What is the factor name for the formula (1 + i)^-n?
Capital recovery
Uniform gradient future worth
Single payment compound amount
Single payment present worth
Which of the following refers to the branch of computer science that is concerned with making computers behave and “think” like humans?
Robotics Science
Artificial Intelligence
Neural Network
Intelligence Network
Which of these location/s described partially protected locations under canopies, marques, roofed and open porches subject to moderate degree of moisture in the PECI?
Wet
Dry
Moist
Damp
How many times the diameter of the largest raceways shall the length of the box be in straight pulls?
none of these
4
8
6
Mr. Cruz borrowed P 20,000.00 from a bank with 15% interest per annum, find the total amount to be repaid at the end of two years.
P 23,000.00
P 25,720.90
P 24,664.75
P 26,450.00
A project manager is informed midway through project planning that she was given inaccurate data regarding new regulations affecting the required end date of her project. She may need to make a few adjustments, but she thinks she can still manage the project to complete it before the regulations take effect. She confirms this by analyzing the sequence of activities with the least amount of scheduling flexibility. What technique is she using?
Precedence diagramming
Work breakdown structure
Critical path method
Flowchart
Express a pressure gage reading of 35 psi in absolute kPa?
341
812
182
314
Which of the following ratio is correct in providing a physical meaning for the Reynolds number?
Buoyant force/inertial force
Drag force/viscous force
Viscous force/inertial force
Inertial force/viscous force
A hydraulic hoist raises a 1750 kg car 1.8 m in an auto repair shop. The hydraulic pump has a constant pressure of 800 kPa on its piston. What is the increase in potential energy (kJ) of the car should the pump displace to deliver that amount of work?
30.90
17.17
3.09
139.06
Which of the following best describes the 0.2% offset yield stress?
It is the stress at which the material elastically strains 0.2%.
It is the elastic limit after which a measurable plastic strain has occurred.
It is the stress at which the material plastically strains 0.2%.
It is 0.2% below the fracture point of the material.
Which of the following is an example of an integrity violation of e-commerce security?
A customer denies that he or she is the person who placed the order.
An unauthorized person intercepts an online communication and changes its content.
A Web site is not actually operated by the entity the customer believes it to be.
A merchant uses customer information in a manner not intended by the customer.
A garden hose fills a 32 L wastebasket in 120 second. The opening at the end of the hose has radius of 1 cm. How fast is the water traveling as it leaves the hose in m/s?
0.85
0.63
0.38
0.50
With an interest rate of 6% compounded semiannually, the value of a P 1,500 investment after 6 years is nearly equal to _______.
P 2,139
P 2,016
P 2,269
P 1,900
Which of the following is/are the disadvantage/s of operating an ungrounded electrical system?
I. Transient overvoltages cannot be controlled.
II. Power system overvoltages are not controlled.
III.estructive arcing burndowns can occur on a second fault.
II and III
I, II, and III
I only
I and II
The temperature of 105 g of liquid water at 0 degree C is raised by 1 degree C. What is the estimated calories consumed?
105 cal
95 cal
110 cal
100 cal
What is the MOST nearly effective annual interest rate on a loan if the nominal interest rate is 9% per year compounded quarterly?
9.31%
9.84%
9.52%
9.68%
The leaning tower of Pisa is 54.5 m tall. Supposedly Galileo investigated the behaviour of falling objects by dropping them from the top of this tower and timing their descent. How long in seconds would it take an object to fall 54.5 m if air effects are negligible?
3.33
3.48
34.8
33.3
A young electrical engineer borrowed money P at 12% interest and paid P2,000 per annum for the last 4 years. What does he have to pay at the end of the fifth year in order to pay off his loan?
P 6,292.93
P 6,999.39
P 6,222.39
P 6,922.93
First law of thermodynamics is also known as
Heat Transfer
Conservation of Heat
Conservation of Energy
Utilization of Energy
An investment of X dollars is made at the end of each year for 3 years, at an interest rate of 9% per year compounded annually. What will the dollar value of the total investment be upon the deposit of the third payment?
3.582X
2.783X
3.278X
1.378X
Which of the following refers to the parallel axis theorem for second moment of area for strength of materials?
Young's theorem
Steiner's theorem
Maxwell theorem
Mohr's theorem
In flow chart, what is the symbol used in beginning or termination?
diamond
square
oval
rectangle
What type of thermodynamics system that allow energy to cross the system boundary but does NOT allow the mass to cross the boundaries of the system?
dynamics system
statics system
Closed system
Open system
Which of the following does NOT affect owner’s equity?
license to start operation
expense to get license to start operation
invested capital
dividends paid
A temperature of a body is measured to be 261/2C. Determine the temperature in 1/2F.
78.8
75.2
80.6
82.5
An object that has momentum must also have
acceleration
potential energy
impulse
kinetic energy
What type of knot is used to protect sockets in extension cords?
under-writer
fire
sheep shank
clove hitch
The Economic Order Quantity (EOQ) is defined as the order quantity which minimizes the inventory cost per unit time. Which of the following is not an assumption of the basic EOQ model with no shortages?
There is an upper bound on the quantity ordered.
The demand rate is uniform and constant.
There is a positive cost on each unit inventoried.
The entire recorder quantity is delivered instantaneously.
Vinegar is a solution of water and what kind of acid?
Nitric acid
Sulfuric acid
Phosphoric acid
Acetic acid
The unit of joule can be converted to which of the following?
Pa/m2
Pa*m^3
Pa*m2
N-kg
Two skydivers are playing catch with ball while they are falling through the air. Ignoring air resistance, in which direction would one skydiver throw the ball relative to the other if the one wants the other to catch it?
above the other since the ball will fall more slowly
above the other since the ball will fall faster
below the other since the ball will fall more slowly
directly at the other since there is no air resistance
In rigid metallic conduit, the minimum electrical trade size is mm.
25
20
15
32
A series of uniform payment over an infinite period of time
Perpetuity
Depletion
Capitalized cost
Inflation
Which of the following is NOT acceptable as a FORTRAN integer variable name?
IRISH
KOST
MAPLE
INSERTS
What is a substance that cannot be broken down into simpler substances?
Ion
Atom
Element
Molecule
What is the efficiency of an Otto cycle with a compression ratio of 6:1? The gas used is air.
0.191
0.512
0.488
0.167
The standard volume at STP of one mole is
42.4 L
24.2 L
44.2 L
22.4 L
Estimated value of the property at the useful life.
Book value
Salvage value
Fair value
Market value
What is the most essential attribute of a project manager?
Charisma
Knowledge
Leadership
Communication skill
A surfer floats on quiet water (n = 1.33) waiting for a big wave. A shark swims toward him at a depth of 4m. How close (horizontally) can the shark approach before the surfer can spot him? The surfer is lying on his board with his eyes close to the water surface.
4.6
5.3
3.5
6.4
DMC stands for
Distribution Management Cooperative
Distribution Management Commission
Distribution Management Code
Distribution Management Committee
A cantilever wooden mast 12 m high tapers linearly from 20 cm diameter at the base to 10 cm diameter at the top. If the ultimate strength of the material of the mast is 35 MN/sqm, calculate the magnitude of the load which will cause failure.
1,780
2.036
1,859
1,933
A laboratory room keeps a vacuum of 0.1 kPa. What net force does that put on the door of size 2 m by 1 m?
100 N
500 N
200 N
300 N
Which of the following in thermodynamics is considered as the heat content of a system?
Molar Heat
Enthalpy
Entropy
Internal Heat
A motor furnishes 120 hp to a device that lifts a 5000 kg load to a height of 13 m in a time of 20 sec. What is the efficiency of the machine?
41%
40%
36%
33%
Process of posting latitude and longitude to pictures and images.
Podcasting
Posting
Flagging
Geotagging
At 20oC the resistivity of tungsten is 5.6 x 10-8 Ω-m and α = 4.5 x 10−3 (oC)-1, tungsten wire diameter of 0.40 mm and length 40 cm is connected to a 36 V power supply. What current does it carry at 20oC?
174 A
191 A
202 A
185 A
In Excel, the cell A2 contains the value 2. The formula in cell B2 is =A2*4/$A$2. If the equation in cell B2 was copied to cells C2 and D2. What will be the value in D2?
16
8
32
2
An airplane accelerates down a runway at 3.20 m/s square for 32.8 s until it finally lifts off the ground. Calculate the distance in meters travelled before takeoff.
1862.22
1978.11
1721.34
2018.93
In an engine cylinder of steel has a cross-sectional area of 1.2 cm2 and a length of 2 cm at 23°C. When it heated to 90°C, what compressive force would have to be applied to it keep it from expanding? For steel, α = 0.000012/C and Young’s modulus is Y = 20 x 10^10 Pa.
19,296 N
16,080 N
17,688 N
20,904 N
A leak from a faucet comes out in separate drops. Which of the following is the main cause of this phenomenon?
gravity
air resistance
viscosity of the fluid
surface tension
Which of the following defined a phenomenon of taking up atoms or energy from the environment into a body?
Absorption
Atomization
Alteration
Crystallization
