問題一覧
1
The strengthening process involving the formation of fine distribution of a second phase is called ______.
Precipitation hardening
2
The temperature above which a ferromagnetic material must be heated to lost is ferromagnetism is called the _____.
Curie temperature
3
The strong magnetic behavior exhibited by permanent magnets is called _______.
Ferromagnetism
4
What refers to the measure of the atom’s tendency to attract an additional electron?
Electron affinity
5
Which of the following is NOT a noble gas?
Antimony
6
The most electronegative element among the following is:
Fluorine
7
The ionization energy is _________ to the atomic size of atom.
inversely proportional
8
A motorist starts a trip on a cold morning when the temperature is 4 degrees Celsius and she checks her tire pressure at a gas station and
finds the pressure gauge reads 32 psi. After driving all day, her tires
heat up and by afternoon the tire temperature has risen to 50 degrees
Celsius. Assuming the tire volume is constant, to what pressure will the
air in the tires have risen?
54.8 psia
9
How many grams of oxygen are there in 2.5 moles of Ca(NO3)2? (Ca =
240 g
10
Calculate the oxygen pressure in a mixture of 0.500 mol of oxygen and 0.750 mol of nitrogen with a total pressure of 40.0 kPa.
16.0 kPa
11
The properties of a material that do not change when the amount of substance changes is called _______ properties.
intensive
12
What happens to the pressure of a sample of helium gas if the temperature is increased from 200 K to 800 K, with no change in volume?
P will increase by a factor of 4
13
Calculate the mass at STP, in grams, of 230 ml of Cl2 gas at 20°C and 740 torr pressure.
0.662 g
14
What would be the number of moles of chlorine gas present if the gas fills a 75-ml flask having a pressure of 755 mmHg and a temperature of 100°C?
0.00243
15
A 400 kN block is resting on a rough horizontal surface for which the coefficient of friction is 0.40. Determine the force P required to cause motion to impend if applied to the block.
160 kN
16
The rate of change in momentum is directly proportional to the impressed force, and takes place in the same direction in which the force acts. This statement is known as ______.
The Law of Acceleration
17
What is the sign of the focal length for convex spherical mirrors?
Negative
18
This phenomenon is evident in making and designing plane and spherical mirrors.
Reflection
19
Which one of the following statements is true concerning the motion of an ideal projectile launched at an angle of 45° to the horizontal?
The vertical speed decreases on the way up and increases on the way down.
20
The area between the graph and the time axis of a velocity versus time graph gives the ______.
displacement
21
The coefficient of static friction between a box and a ramp is 0.5. The ramp’s incline angle is 30°. If the box is placed at rest on the ramp, the box will
accelerate down the ramp
22
A crate of mass 100 kg rests on the floor. The coefficient of static friction is 0.4. If a force of 250 N (parallel to the floor) is applied to the crate, what’s the magnitude of the force of static friction on the crate?
250 N
23
A rotating, rigid body makes one complete revolution in 2 s. What is the average angular velocity in rad/s?
Pi
24
The slope of a velocity versus time graph gives the ______.
acceleration
25
In which of these situations can an 8-bit system correctly access more than 128 different integers?
when the integers are in the range of [-255, 0]
26
What is the final value of Y in terms of X
INPUT X Y = 0
Z = x+1
FOR K = 1 TO Z
Y = Y+Z
NEXT K
Y = Y-(2*Z-1)
X²
27
Which of the following is the ground state electron configuration of a copper atom?
1s²2s²2p⁶3s²3p⁶4s¹3d¹⁰
28
Describe what will happen to the light ray traveling from one medium to another if the second medium has a higher index of refraction than the first medium.
Light will bend towards the normal line.
29
Images produced by convex mirrors are always
Smaller than the object
30
A flashlight and the lights in a car use a ______ mirror to create a beam of light.
Concave
31
Which of the following colors represents the greatest value in terms of wavelength?
Red
32
Which of the following is an example of top-down approach for the preparation of nanomaterials?
Mechanical Grinding
33
Which layer of the atmosphere is greatly affected by air pollution?
Troposhere
34
The computer language that is executed within a computer's central processing unit is called.
A machine language
35
Which of the following terms is best defined as a formula or set of steps for solving a particular problem?
Algorithm
36
Only about 20% of the potential energy of gasoline is used in powering an automobile. The remaining energy is lost as low-quality heat. This is an example of the ____.
Second law of thermodynamics
37
Which of the following is NOT an advantage of nuclear fusion?
None of the choices
38
Particulates (<1μm size) remaining suspended in air indefinitely and transported by wind currents are called ____.
Aerosols
39
A block of mass 2 kg slides on an inclined plane that makes a 30- degree angle with the horizontal. If the coefficient of friction between the block and the plane is 0.86, what should be the force parallel to the plane applied to the block so that it moves up the plane without any acceleration?
24.4N
40
A common unit of energy is the electronvolt. 1 eV = _____ J.
1.6 x 10-19
41
A sound wave with a frequency of 343 Hz travels through the air. What is its wavelength?
1 m
42
From a height of 100 m, a ball is thrown horizontally with an initial speed of 15 m/s. How far does it travel horizontally in the first 2 seconds?
30 m
43
A car is traveling in a straight line along a highway at a speed of 20 m/s. The driver steps on the gas pedal and, 3 seconds later, the car’s speed is 32 m/s. Find its average acceleration.
4 m/s2
44
A stone is thrown horizontally with an initial speed of 30 m/s from a bridge. Find the stone’s total speed when it enters the water 4 seconds later. (Ignore air resistance).
50 m/s
45
A car is traveling in a straight line along a highway at a constant speed of 80 miles per hour for 10 seconds. Find its acceleration.
0
46
A car is traveling at 20 m/s away from a stationary observer. If the car’s horn emits a frequency of 600 Hz, what frequency will the observer hear? (Use v = 340 m/s for the speed of sound.)
(34/36)(600 Hz)
47
What is the wavelength of an X-ray whose frequency is 1.0 × 1018 Hz?
3.0 x 10^-10 Hz
48
Light travels ______ in matter than in vacuum.
slower
49
e^x
50
The most general thermodynamic process is _____.
Polytropic
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100問 • 1年前問題一覧
1
The strengthening process involving the formation of fine distribution of a second phase is called ______.
Precipitation hardening
2
The temperature above which a ferromagnetic material must be heated to lost is ferromagnetism is called the _____.
Curie temperature
3
The strong magnetic behavior exhibited by permanent magnets is called _______.
Ferromagnetism
4
What refers to the measure of the atom’s tendency to attract an additional electron?
Electron affinity
5
Which of the following is NOT a noble gas?
Antimony
6
The most electronegative element among the following is:
Fluorine
7
The ionization energy is _________ to the atomic size of atom.
inversely proportional
8
A motorist starts a trip on a cold morning when the temperature is 4 degrees Celsius and she checks her tire pressure at a gas station and
finds the pressure gauge reads 32 psi. After driving all day, her tires
heat up and by afternoon the tire temperature has risen to 50 degrees
Celsius. Assuming the tire volume is constant, to what pressure will the
air in the tires have risen?
54.8 psia
9
How many grams of oxygen are there in 2.5 moles of Ca(NO3)2? (Ca =
240 g
10
Calculate the oxygen pressure in a mixture of 0.500 mol of oxygen and 0.750 mol of nitrogen with a total pressure of 40.0 kPa.
16.0 kPa
11
The properties of a material that do not change when the amount of substance changes is called _______ properties.
intensive
12
What happens to the pressure of a sample of helium gas if the temperature is increased from 200 K to 800 K, with no change in volume?
P will increase by a factor of 4
13
Calculate the mass at STP, in grams, of 230 ml of Cl2 gas at 20°C and 740 torr pressure.
0.662 g
14
What would be the number of moles of chlorine gas present if the gas fills a 75-ml flask having a pressure of 755 mmHg and a temperature of 100°C?
0.00243
15
A 400 kN block is resting on a rough horizontal surface for which the coefficient of friction is 0.40. Determine the force P required to cause motion to impend if applied to the block.
160 kN
16
The rate of change in momentum is directly proportional to the impressed force, and takes place in the same direction in which the force acts. This statement is known as ______.
The Law of Acceleration
17
What is the sign of the focal length for convex spherical mirrors?
Negative
18
This phenomenon is evident in making and designing plane and spherical mirrors.
Reflection
19
Which one of the following statements is true concerning the motion of an ideal projectile launched at an angle of 45° to the horizontal?
The vertical speed decreases on the way up and increases on the way down.
20
The area between the graph and the time axis of a velocity versus time graph gives the ______.
displacement
21
The coefficient of static friction between a box and a ramp is 0.5. The ramp’s incline angle is 30°. If the box is placed at rest on the ramp, the box will
accelerate down the ramp
22
A crate of mass 100 kg rests on the floor. The coefficient of static friction is 0.4. If a force of 250 N (parallel to the floor) is applied to the crate, what’s the magnitude of the force of static friction on the crate?
250 N
23
A rotating, rigid body makes one complete revolution in 2 s. What is the average angular velocity in rad/s?
Pi
24
The slope of a velocity versus time graph gives the ______.
acceleration
25
In which of these situations can an 8-bit system correctly access more than 128 different integers?
when the integers are in the range of [-255, 0]
26
What is the final value of Y in terms of X
INPUT X Y = 0
Z = x+1
FOR K = 1 TO Z
Y = Y+Z
NEXT K
Y = Y-(2*Z-1)
X²
27
Which of the following is the ground state electron configuration of a copper atom?
1s²2s²2p⁶3s²3p⁶4s¹3d¹⁰
28
Describe what will happen to the light ray traveling from one medium to another if the second medium has a higher index of refraction than the first medium.
Light will bend towards the normal line.
29
Images produced by convex mirrors are always
Smaller than the object
30
A flashlight and the lights in a car use a ______ mirror to create a beam of light.
Concave
31
Which of the following colors represents the greatest value in terms of wavelength?
Red
32
Which of the following is an example of top-down approach for the preparation of nanomaterials?
Mechanical Grinding
33
Which layer of the atmosphere is greatly affected by air pollution?
Troposhere
34
The computer language that is executed within a computer's central processing unit is called.
A machine language
35
Which of the following terms is best defined as a formula or set of steps for solving a particular problem?
Algorithm
36
Only about 20% of the potential energy of gasoline is used in powering an automobile. The remaining energy is lost as low-quality heat. This is an example of the ____.
Second law of thermodynamics
37
Which of the following is NOT an advantage of nuclear fusion?
None of the choices
38
Particulates (<1μm size) remaining suspended in air indefinitely and transported by wind currents are called ____.
Aerosols
39
A block of mass 2 kg slides on an inclined plane that makes a 30- degree angle with the horizontal. If the coefficient of friction between the block and the plane is 0.86, what should be the force parallel to the plane applied to the block so that it moves up the plane without any acceleration?
24.4N
40
A common unit of energy is the electronvolt. 1 eV = _____ J.
1.6 x 10-19
41
A sound wave with a frequency of 343 Hz travels through the air. What is its wavelength?
1 m
42
From a height of 100 m, a ball is thrown horizontally with an initial speed of 15 m/s. How far does it travel horizontally in the first 2 seconds?
30 m
43
A car is traveling in a straight line along a highway at a speed of 20 m/s. The driver steps on the gas pedal and, 3 seconds later, the car’s speed is 32 m/s. Find its average acceleration.
4 m/s2
44
A stone is thrown horizontally with an initial speed of 30 m/s from a bridge. Find the stone’s total speed when it enters the water 4 seconds later. (Ignore air resistance).
50 m/s
45
A car is traveling in a straight line along a highway at a constant speed of 80 miles per hour for 10 seconds. Find its acceleration.
0
46
A car is traveling at 20 m/s away from a stationary observer. If the car’s horn emits a frequency of 600 Hz, what frequency will the observer hear? (Use v = 340 m/s for the speed of sound.)
(34/36)(600 Hz)
47
What is the wavelength of an X-ray whose frequency is 1.0 × 1018 Hz?
3.0 x 10^-10 Hz
48
Light travels ______ in matter than in vacuum.
slower
49
e^x
50
The most general thermodynamic process is _____.
Polytropic