<span>If the balloon is closed then both volume and pressure will increase when the gas inside is heated.</span>
        
             
        
        
        
To solve this problem it is necessary to apply the concepts related to the conservation of energy and heat transferred in a body.
By definition we know that the heat lost must be equal to the heat gained, ie

Where,
Q = Heat exchange
The heat exchange is defined as

Where,
 Specific heat
m = mass
 Change in Temperature
Therefore replacing we have that 


Replacing with our values we have that




Therefore the highest possible temperature of the spoon when you finally take it out of the cup is 75.24°C
 
        
             
        
        
        
Answer:
A) equal to the battery's terminal voltage.
Explanation:
When the capacitor is fully charged after long hours of charging , its  potential becomes equal to the emf of the battery and its polarity is opposite to that of battery . Hence net emf becomes equal . The capacitor itself becomes a battery which is connected in the circuit with opposite polarity . This results in the net emf and  current becoming zero . There is no charging current when the capacitor is fully charged . 
 
        
             
        
        
        
1. False 
2. Positive 
I’m just joking I don’t know the answersss
        
             
        
        
        
Number 20 is B and 21 is C