Choice-'a' is a slippery, misleading, ambiguous statement,
but it's less wrong than any of the other choices on this list. 
        
             
        
        
        
Answer:
a) -2.038 m/s²
b) 40.33 mph
c) 312.5 m
Explanation:
t = Time taken
u = Initial velocity
v = Final velocity
s = Displacement
a = Acceleration

Acceleration of the boat is -2.083 m/s² if the boat will stop at 150 m.

Speed of the boat by when it will hit the dock is 18.03 m/s
Converting to mph



Speed of the boat by when it will hit the dock is 40.33 mph

The distance at which the boat will have to start decelerating is 312.5 m
 
        
             
        
        
        
Explanation:
A chemical reaction in which heat or energy is released is known as an exothermic reaction.
On the other hand, when two objects are placed together and heat flows from hotter object to colder object then this process is known as conduction. Therefore, energy is dissipated in conduction process.
Since energy released released goes into the atmosphere and is not used anywhere.
Thus, we can conclude that when an exothermic reaction releases thermal energy, this energy is usually not useable to do work and it is dissipated by conduction.
 
        
             
        
        
        
Answer:
 approximately 304358
Explanation:
 wavelength = speed / frequency 
speed of an electromagnetic wave is 299,792,458 m/s in a vacuum
 
        
             
        
        
        
Answer:
Number of electrons, 
Explanation:
Given that, 
Charge on the fur, 
A piece of amber is charged by rubbing with a piece of fur. We need to find the electrons were added to the amber. It can be calculated using the quantization of charge as
q = n × e
Where
n is the number of electrons 
e is the charge on electron
 
 
 
 

So,  number of electrons are added to the amber. Therefore, this is the required solution.
 number of electrons are added to the amber. Therefore, this is the required solution.