<u>Answer:</u> The elevation in boiling point is 1.024°C.
<u>Explanation:</u>
To calculate the elevation in boiling point, we use the equation:

where,
i = Van't Hoff factor = 2 (for NaCl)
 = change in boiling point  = ?
 = change in boiling point  = ?
 = boiling point constant =
 = boiling point constant = 
m = molality = 1.0 m
Putting values in above equation, we get:

Hence, the elevation in boiling point is 1.024°C.
 
        
             
        
        
        
Answer:
Explained
Explanation:
following are characteristics of scientific thinking and investigating
1. Critical thinking
2. A curious mind
3. Possessing a Skeptical attitude
4. Problem solving attitude
5.A obervant of empirical evidences
A scientific theory is a unifying and self-consistent explanation of fundamental natural processes or phenomena that is totally constructed of corroborated hypotheses
 
        
             
        
        
        
Answer:
The distance is 
=
7
m
 
Explanation:
Apply the equation of motion
s
(
t
)
=
u
t
+
1
2
a
t
2
 
The initial velocity is 
u
=
0
m
s
−
1
 
The acceleration is 
a
=
2
m
s
−
2
 
Therefore, when 
t
=
3
s
 , we get
s
(
3
)
=
0
+
1
2
⋅
2
⋅
3
2
=
9
m
 
and when 
t
=
4
s
 
s
(
4
)
=
0
+
1
2
⋅
2
⋅
4
2
=
16
m
 
Therefore,
The distance travelled in the fourth second is
d
=
s
(
4
)
−
s
(
3
)
=
16
−
9
=
7
m
 
        
             
        
        
        
Answer
given,
mass of the goalie(m₁) = 70 kg
mass of the puck (m₂)= 0.11 kg
velocity of the puck = 31.5 m/s
elastic collision






