Answer:
this statement describes meteor's velocity, 
because velocity is a vector quantity which has both magnitude as well as a specific direction and here the meteor's direction is specified in the statement hence we conclude that this statement describes meteor's velocity as well as speed too.
 
        
             
        
        
        
Answer:
( )=1913.31 N/m^2
)=1913.31 N/m^2
Explanation:
given:
 =0.85
=0.85
 =90 m/s
=90 m/s
γ∞=1.23 kg/m^3
solution:
since outside pressure is atm pressure vaccum can be defined by ( )
)
 =√2(
=√2( )/γ∞[
)/γ∞[ -1]
-1]
( )=1913.31 N/m^2
)=1913.31 N/m^2
 
        
             
        
        
        
Using the given equation you get:
E = 1.99x10^-25 / 9.0x10^-6
Divide 1.99 by 9.0: 1.99/9.0 = 0.22
For the scientific notation, when dividing subtract the two exponents:
25 -6 = 19
So you now have 0.22 x 10^-19
Now you need to change the 0.22 to be in scientific notation form:
2.2 x 10^-20
The answer is B.
 
        
             
        
        
        
Answer:
100 cc 
Explanation:
Heat released in cooling human body by t degree
= mass of the body x specific heat of the body x t
Substituting the data given 
Heat released by the body 
= 70 x 3480 x 1 
= 243600 J
Mass of water to be evaporated 
= 243600 / latent heat of vaporization of water
= 243600 / 2420000 
= .1 kg
= 100 g 
volume of water
= mass / density
= 100 / 1
100 cc 
1 / 10 litres.