Answer:
Question #1- Scientists agree to a standard way of reporting measured quantities in which the number of reported digits reflects the precision in the measurement- more digits, more precision; less digits, less precision. You just studied 14 terms! 
Question #2-  Units are important because without proper measurement and units to express them, we can never express physical laws precisely just from qualitative reasoning. Units are incredibly important to physics. Two of the most important reasons are the following: (1) they help us. to avoid making mistakes in computation, and (2) they serve as a check on computations once they are completed. In the first case, you can avoid adding 3m and 25cm and coming up with the wrong answer.
Explanation: Hope this helps please mark brainliest!
 
        
                    
             
        
        
        
Answer:
The value is 
Explanation:
From the question we are told that 
 The mass of the ice cube is 
 The temperature of the ice cube is  
 
 The mass of the copper cube is 
 The final temperature of both substance is 
Generally form the law of thermal energy conservation, 
 The heat lost by the copper cube = heat gained by the ice cube 
Generally the heat lost by the copper cube is mathematically represented as 
 ![Q =  m_c  *  c_c *  [T_c  -  T_f ]](https://tex.z-dn.net/?f=Q%20%3D%20%20m_c%20%20%2A%20%20c_c%20%2A%20%20%5BT_c%20%20-%20%20T_f%20%5D)
 The specific heat of copper is 
Generally the heat gained by the ice cube is mathematically represented as
 
Here L is the latent heat of fusion of the ice with value 
 So 
 
=>  
 
So 
 ![2505  =  0.540  *  385 *  [T_c  - 0 ]](https://tex.z-dn.net/?f=2505%20%20%3D%20%200.540%20%20%2A%20%20385%20%2A%20%20%5BT_c%20%20-%200%20%5D) 
 
=>    
 
        
             
        
        
        
The force between the spheres increases when the mass increases in one of the spheres.
<u>Explanation:</u>
             Newton law of universal gravity extends gravity beyond the earth's surface. This gravity depends directly on the mass of both objects and is inversely proportional to square of distance between their centers.  
                    
           Since gravity is directly proportional to “mass of both interacting objects”, stronger objects with greater gravitational force attract. If the mass of one object increases, gravity between them also increases. For example, if an object's mass of one double, force between them also doubles.