It's a subsection of Geology and Biology
        
             
        
        
        
Answer:
Magnification m is 2.5cm
Explanation:
This problem bothers on lenses 
Given data 
Object distance u= 4cm
Height of object v= 10 cm
The problem is quite straightforward seeing that object and image distances are given 
We know that the magnification 
m= size of image/size of object 
m= v/u= 10/4 = 2. 5cm
What is a convex lens 
A convex lens is a type of lens that has the centre thicker than the ends, the thickness at the centre makes the lens surface to curve outward. Convex lens causes close light rays of light to converge at a point after refraction. 
 
        
             
        
        
        
Explanation:
33. The 1.5kg owl is now soaring at 20m/s. What is the owl’s KE?
a. Step 1: Formula <u>½mv²</u>
b. Step 2: Data m = <u>1</u><u>.</u><u>5</u><u> </u><u>kg</u>, v = <u>2</u><u>0</u><u> </u><u>m</u><u>/</u><u>s</u>
c. Step 3: Solve
KE = (1/2)(<u>1</u><u>.</u><u>5</u>)(<u>2</u><u>0</u>)² = <u>3</u><u>0</u><u>0</u><u> </u><u>J</u>
 
        
             
        
        
        
Answer:
1.37 seconds before.... splat !
Explanation:
y = y0 + v0 t + 1/2 a t^2      y0 = 30       y = 0 
                     v0 = 0 ( from rest) 
                             a = - 32.2 ft/s^2 
0 = 30 - 1/2 * 32.2 * t^2 
t=1.366 seconds                   <u>  Note that   mass   is irrelevant.</u>