العلوم الصف الثالث الاعدادى الترم الاول

The mirro r , whose reflecting surface is a part of the inner surface the sphere.

An object was placed between a convex lens whose focal length is 6 cm. a nd a plane mirro r .Complete the following statement:

The image fo r med of the object by a plane mirro r at a distance of .... ...... cm. fr om it's surface

A light ray that falls on a plane mirro r as in the figure it reflects, wh ere the angle of reflection equals……..

The ratio between the final speed a nd the initial speed of an object moves at an accelerating motion is.............

An object was placed between a convex lens whose focal length is 6 cm. a nd a plane mirro r .Complete the following statement:

The distance between the image of the object which is fo r med by a convex lens a nd the image which is fo r med by a plane mirro r equal… … cm

The speed of a moving object relatively to a constant o r a moving observer

The car which begins its movement fr om rest, moves at ..........

The person with no r mal vision sees the near objects clearly at a distance not less than.....

The two facto r s which can be used to describe the motion of a body are the… .. a nd …

If the unifo r m speed of a car is (90 km/h). This means that the car covers a distance equals…… metres in 40 sec.