Question

Question 27
If Mrs. Hankinson slides a 500 g book with 0.5 N of force, what is the acceleration of the book?

F = ma

a
1000 m/s2

b
1.0 m/s2

c
250 m/s2

d
0.001 m/s2
Question 28
The mass number of an element is equal to:

a
the number of electrons
b
the number of protons and electrons
c
the number of protons
d
the number of protons and neutrons
Question 29
Match the Gas Law to its relationship.

Column A
1.
Gay-Lussac's Law:
Gay-Lussac's Law
2.
Charles' Law:
Charles' Law
3.
Boyle's Law:
Boyle's Law
Column B
a.If the temperature of a gas increases, then the volume of the gas increases.
b.If the volume of a gas increases, then the pressure of the gas decreases.
c.If the temperature of a gas increases, then the pressure increases.
Question 30
Given the following nuclear reaction:



Column A
1.
What is the atomic mass of the new atom?:
What is the atomic mass of the new atom?
2.
What is the atomic number of the new atom?:
What is the atomic number of the new atom?
3.
What is the symbol of the new atom?:
What is the symbol of the new atom?
4.
What type of decay is demonstrated here?:
What type of decay is demonstrated here?
Column B
a.Rn
b.90
c.Th
d.220
e.224
f.Ra
g.86
h.Alpha Decay
i.Gamma Decay
j.Beta Decay
k.228
l.88
m.84
Question 31
If a radioactive isotope has a half-life of 20 hours, how many half-lives have occured after 80 hours have passed?

a
3
b
4
c
5
d
2
Question 32
Which of the following chemical equations is balanced correctly?

a




b




c




d




Question 33
Match the scenario to the Newton's Law it describes.

Column A
1.
As a man steps forward off of a boat, the boat moves backwards.:
As a man steps forward off of a boat, the boat moves backwards.
2.
A stationary book on the table must be picked up in order for it to move:
A stationary book on the table must be picked up in order for it to move
3.
A soccer ball rests on a field until it is kicked.:
A soccer ball rests on a field until it is kicked.
4.
Increasing the mass on an object experiencing the same force would decrease the acceleration:
Increasing the mass on an object experiencing the same force would decrease the acceleration
5.
A man pushes on a wall, and the wall pushes back on the man.:
A man pushes on a wall, and the wall pushes back on the man.
6.
A rocket made with lighter composite materials will accelerate faster than a heavier one:
A rocket made with lighter composite materials will accelerate faster than a heavier one
Column B
a.Newton's Second Law
b.Newton's Third Law
c.Newton's First Law

Answer 1

Here are the answers:

Q27: b. 1.0 m/s^2
- F = ma → a = F/m = 0.5 N / 0.5 kg = 1.0 m/s^2

Q28: d. the number of protons and neutrons

Q29: 1 → c, 2 → a, 3 → b
- Gay-Lussac (1): c (temperature ↑ → pressure ↑)
- Charles (2): a (temperature ↑ → volume ↑)
- Boyle (3): b (volume ↑ → pressure ↓)

Q30: 1 → e (224), 2 → l (88), 3 → f (Ra), 4 → h (Alpha Decay)
- (This corresponds to Th-228 undergoing alpha decay to Ra-224.)

Q31: b. 4
- 80 h / 20 h per half-life = 4 half-lives

Q32: I can't determine which equation is balanced because the chemical equations/images are not shown. Please provide the four equations (text or images) and I’ll pick the correctly balanced one.

Q33:
1 → b (Newton’s Third Law)
2 → c (Newton’s First Law)
3 → c (Newton’s First Law)
4 → a (Newton’s Second Law)
5 → b (Newton’s Third Law)
6 → a (Newton’s Second Law)