Answer:
Explanation:
Velocity by definition means speed and direction of an object. This means it has a value and a positive or minus sign indicating direction. Speed is the absolute value of velocity because there is no direction correlated with speed. If you add a direction, it is then called velocity
 
        
             
        
        
        
<span>During 1970s, same observations were seen as what we have observed today pertaining to our climate. Journals were discussing that there would be warming because of greenhouse gases emissions. Also, it was observed between the years 1970 to 1990 that there was a steady surface temperature increase. Due to this, people are now fixated with global warming rather than on global cooling.</span>
        
             
        
        
        
Answer:
88 m/s
Explanation:
To solve the problem, we can use the following SUVAT equation:

where
v is the final velocity
u is the initial velocity
a is the acceleration
d is the distance covered
For the car in this problem, we have
d = 484 m is the stopping distance
v = 0 is the final velocity
 is the acceleration
 is the acceleration
Solving for u, we find the initial velocity:

 
        
             
        
        
        
Answer:
(a) The ratio of the pressure amplitude of the waves is 43.21
(b) The ratio of the intensities of the waves is 0.000535
Explanation:
Given;
density of gas,  = 2.27 kg/m³
 = 2.27 kg/m³
density of liquid,  = 972 kg/m³
 = 972 kg/m³
speed of sound in gas,  = 376 m/s
 = 376 m/s
speed of sound in liquid,  = 1640 m/s
 = 1640 m/s
The of the sound wave is given by;

Where;
 is the pressure amplitude
 is the pressure amplitude

(b) when the pressure amplitudes are equal, the ratio of the intensities is given as;
