4. Answer the following questions:
a.
b.
Write a formula of lens and magnification of lens.
C.
d.
e.
f.
نعمه
the object placed? Draw a ray diagram.
What is the function of the retina?
How does the eye
. control the amount of light entering it?
What type of
What is myopia? How is it corrected?
What is hypermetropia? How is it corrected?
An object is
Sanjay sees distant objects comfortably but he wears spectado
An object is
book.
Find
i. What defect of vision does he have?
ii. Which type of spectacles should he use?
wil. Is the
i.
Draw a diagram to show how a convex lens forms a magufuli
A convex lens forms a real image of the same size as that of
e of defect of vision does she have? Sketch a ray diagram for

Which notation is used to represent an alpha particle? a. b. c. d.

Pl asaaap ! match the term to the correct description. a type of wave that transfers energy where the particles in the medium move perpendicular to the direction in which the energy is traveling. a type of wave that transfers energy where the particles in the medium move parallel to the direction in which the energy is traveling. movement that is back and forth, like an equal sign = a type of wave that transfers energy where the particles in the medium move in a circle motion while the energy travels left or right. movement that is like a t transfers energy from one location to another 1. wave 2. parallel movement 3. perpendicular movement 4. transverse wave 5. longitudinal wave 6. surface wave

Awind turbine is rotating counterclockwise at 0.5 rev/s and slows to a stop in 10 s. its blades are 20 m in length. (a) what is the angular acceleration of the turbine? (b) what is the centripetal acceleration of the tip of the blades at t=0s? (c) what is the magnitude and direction of the total linear acceleration of the tip of the blades at t=0s?