41.
What is the relationship between speed, distance, and time?
A
Speed = Distance × Time
B
Speed = Distance / Time
C
Speed = Time / Distance
D
Speed = Time × Distance
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What is the relationship between speed, distance, and time?
Speed = Distance × Time
Speed = Distance / Time
Speed = Time / Distance
Speed = Time × Distance
If the displacement-time graph is a straight line, what can be said about the motion of the object?
The object is at rest
The object is in circular motion
The object is accelerating
The object is moving with uniform velocity
An object starts from rest and moves with a constant acceleration of 2 m/s². What is its velocity after 5 seconds?
10 m/s
2 m/s
20 m/s
5 m/s
What is the acceleration of an object in free fall near the surface of the Earth?
0 m/s²
9.8 m/s²
1 m/s²
10 m/s²
Which of the following is not a type of motion?
Circular motion
Rectilinear motion
Irregular motion
Rotational motion
Which of the following describes an object in uniform motion?
The object is accelerating
The object is at rest
The object is changing its direction
The object covers equal distances in equal intervals of time
Which of the following is an example of an element that exists as isotopes?
Hydrogen
Oxygen
Carbon
All of the mentioned
What is the principal cause of the atomic spectra produced by elements?
Electrons jumping from lower to higher energy levels
Protons emitting radiation
Electrons moving in circular orbits
Electrons changing position within an orbital
What is the maximum number of electrons in the third shell of an atom?
32
8
18
2
Which of the following does not conduct electricity?
Copper
Plastic
Water
Iron
Which of the following atomic models does not depict the structure of the atom accurately?
Rutherford's model
Thomson's model
Bohr's model
Dalton's model
What is the charge of an atom that has 10 protons, 10 electrons, and 12 neutrons?
Positive
Negative
Neutral
Undefined
What is the atomic mass unit (amu) based on?
Mass of carbon-12 isotope
Mass of a proton
Mass of a neutron
Mass of an electron
Which of the following is true about the electron?
It has a positive charge
It is located in the nucleus
It has a mass equal to that of a proton
It is found in orbitals outside the nucleus
The electron configuration of sodium (Na) is 2, 8, 1. What is the number of electrons in the outermost shell of sodium?
10
2
1
8
How does the mass number of an atom change when it undergoes beta decay?
It decreases by 1
It stays the same
It doubles
It increases by 1
What is the mass of a neutron?
1 kg
9.1 × 10^-31 kg
1 amu
0 amu
What is formed when an acid reacts with a base?
Salt
Oxygen
Water
Carbon dioxide
What does the law of conservation of mass state?
Mass is gained during a chemical reaction
Mass remains constant during a chemical reaction
Mass can be created in a chemical reaction
Mass is lost during a chemical reaction
What is the molar mass of carbon dioxide (CO₂)?
44 g/mol
18 g/mol
28 g/mol
22 g/mol