The answer would be B..
Since sand can heat up quickly, it will also cool off quickly. But water takes a long time to heat up and cool down.
 
        
             
        
        
        
In order to overcome an object’s inertia (resistance to change), it must be acted upon by an unbalanced force, so the answer to the problem is letter C.
        
                    
             
        
        
        
Answer:
See below
Explanation:
<u>I will use   3 x 10^8 m/s for speed or wave</u>
speed = wavelength * frequency
3 x 10^8  = w * 7.34 x 10^2     <====== are you sure this isn't KILO Hz ?
w = <u>408719. 3 meters   </u>
 
        
             
        
        
        
Answer:
Q = 7272 Kilojoules. 
Explanation:
<u>Given the following data;</u>
Mass = 2.0*101kg = 202kg
Initial temperature, T1 = 10°C
Final temperature, T2 = 90°C
We know that the specific heat capacity of iron = 450J/kg°C
*To find the quantity of heat*
Heat capacity is given by the formula;
 
 
Where;
- Q represents the heat capacity or quantity of heat. 
- m represents the mass of an object. 
- c represents the specific heat capacity of water. 
- dt represents the change in temperature.
dt = T2 - T1
dt = 90 - 10
dt = 80°C
Substituting the values into the equation, we have;
 
 
Q = 7272KJ or 7272000 Joules.
 
        
             
        
        
        
Answer:
kinematics explains the terms like acceleration, velocity, and position of the objects while in motion. 
Some important parameters in kinematics are displacement, velocity, and time.
Explanation:
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