Physical science reviewer about vectors in two dimension, newton's laws and atomic combinations

1. Johnel V. Esponilla
General Physics I Instructor

2. 1 It is the property of a material that can be quantified by
measurement.
A. Physical quantity
B. Base quantity
C. Derived quantity
D. Scalar quantity
A. Physical quantity

3. 2 What is the correct base unit for mass?
A. meter
B. kilogram
C. gram
D. pound
B. kilogram

4. 3 Which of the following is NOT a base quantity?
A. length
B. temperature
C. pressure
D. amount of substance
C. pressure

5. 4 This is any quantity that has MAGNITUDE only
(number value with units).
A. Scalar quantity
B. Vector quantity
C. Base quantity
D. Derived quantity
A. Scalar quantity

6. 5 Which of the following is an example of vector
quantity?
A. velocity, momentum, displacement
B. distance, velocity, speed
C. weight, mass, acceleration
D. displacement, force, speed
A. velocity, momentum, displacement

7. 6 A man walks 50 meters east, then 30 meter east.
Calculate the displacement relative to where he started.
What is the distance traveled by the man?
A. 80 m, east ; 80 m
B. 20 m, east ; 80 m
C. 80 m, east ; 20 m
D. 20 m, east ; 20 m
A. 80 m, east ; 80 m

8. 7 A man walks 40 meters north, then 30 meter east.
Calculate the displacement relative to where he started.
A. 50 m
B. 70 m
C. 10 m
D. 25 m
A. 50 m

9. 8 A man walks 40 meters north, then 30 meter east.
Calculate the displacement relative to where he started.
A. 50 m, north of east
B. 70 m, north of east
C. 10 m, north of east
D. 25 m, north of east
A. 50 m, north of east

10. 9 Suppose a person walked 65 m, 25 degrees East of
North. What were his horizontal and vertical
components?
A. 27.47 m, E ; 58.91 m, N
B. 58.91 m, E ; 27.47 m, N
C. 27.47 m, N ; 58.91 m, E
D. 58.91 m, N ; 27.47 m, E
A. 27.47 m, E ; 58.91 m, N
250 65 m
vc
hc
vc = adj, hyp = 65 m, hc = opp
vc:
Cos theta = adj / hyp
Cos 250 = vc / 65
Vc = cos 25 * 65
Vc = 58.91 m, N
Hc:
Sin theta = opp / hyp
Sin 25 = hc / 65
Hc =sin 25 * 65
Hc = 27.47 m, E

11. 10
Marienne , searching for food, wanders 40 meters East,
then 50 meters North. Frustrated, she wanders another
10 meters West and 10 meters South. Calculate Venus’
displacement.
****Venus is Marienne’s second name
A. 50 meters, N of E
B. 70 meters, N of E
C. 90 meters, N of E
D. 110 meters, N of E
A. 50 meters, N of E
40 m, E
50 m, N
10 m, W
10 m, S
40 m – 10
m =
30 m, E
50 m – 10 m
= 40 m, N
30 m, E
40 m, N
Hypotenuse:
c2 = a2 + b2
c2 = (40 m)2 + (30 m)2
=1600 m2 + 900 m2 = 2500m2
c = 50 m

12. 11 It is the property of an object at rest to remain at rest.
A. inertia
B. unbalanced force
C. friction
D. weight
A. inertia

13. 12 In referring how much matter a body contains, we use
the term
A. inertia
B. volume
C. mass
D. weight
C. mass

14. 13 If an object has twice as much mass as another, then it
also has twice as much weight. Why?
A. because of inertia.
B. because the gravitational force acting on all objects in the same
locality is the same
C. because mass and weight are directly proportional to each other
D. because mass and weight are inversely proportional
C. because mass and weight are directly proportional to each other

15. 14 The element represented by [Ar] 4s2 3d10 4p2 has how
many valence electrons?
A. 2
B. 10
C. 4
D. 12
C. 4

16. 15 The element represented by [He] 2s2 2p4 would have
need to share how many electrons with another atom
to achieve a noble gas configuration?
A. 2
B. 4
C. 6
D. 8
A. 2

17. 16
Which combination of elements would likely form a
covalent bond?
A. V and X
B. Y and Z
C. W and Z
D. V and Z
B. Y and Z

18. 17 If two atoms of Y could covalently bond together, what
type of bond would result?
A. Single bond
B. Double bond
C. Triple bond
D. Quadruple bond
B. Double bond

19. 18 Covalently bonding normally occurs between which
types of elements?
A. Metals only
B. non-metals only
C. Metals and non-metals
D. None of these
B. non-metals only

20. 19 The structural drawing that indicates how F2 bonds is:
A. F - F
B. F = F
C. F = F
D. None of these
A. F - F

21. 20 The electron dot diagram that correctly shows the
bonding in H2N2 is:
A.
B.
C.
D.
D.

22. 21 When a covalent bond is formed, what happens to the
outer shell of electrons?
A. An electron is removed from each atom’s outer shell.
B. One of the atoms gains electrons while the other atom loses
electrons.
C. An electron from each atom is shared.
D. Each atom gains electrons to reach a full outer shell.
C. An electron from each atom is shared.

23. 22 What is a covalent bond?
A. A bond between negative electrons and a positive ion.
B. A force of attraction between oppositely charged ions.
C. A force of attraction between electrons and protons.
D. A bond consisting of shared pairs of electrons.
D. A bond consisting of shared pairs of electrons.

24. 23 A group of atoms carrying an electric charge is known
as
A. Crystal lattice
B. A simple ion
C. A radical
D. A covalent bond
C. A radical

25. 24 What is the valency of an element?
A. The charge on an ion of that element.
B. The number of the group to which that element belongs.
C. The number of electrons an atom of that element must gain, lose or
share in order to obtain a full outer shell.
D. The number of protons an atom of that element must gain, lose or
share in order to obtain a full outer shell.
C. The number of electrons an atom of that element must gain, lose or
share in order to obtain a full outer shell.

26. 25 Which one of the following is a property of ionic
substances?
A. They are usually soft solids.
B. They are quite unreactive.
C. They have high melting points and boiling points.
D. They are all liquids at room temperature.
C. They have high melting points and boiling points

27. 26 In covalent compounds, electrons are _______, while in
ionic compounds, electrons are _______. What two
words are missing?
A. Shared and transferred respectively
B. Gained and lost respectively
C. Shared and gained respectively
D. Transferred and shared respectively
A. Shared and transferred respectively

28. 27 The number of electrons gained, lost or shared by an
atom in a chemical bond is also known as
Its valency

29. 28
What element/s tend/s to lose electrons the easiest
when bonding?
Elements in the first two
groups of the Periodic table

30. 29
How many electrons are shared in a double covalent
bond?
4