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اولاً / حبيت اشكر القائمين على هذا المنتدى من إدارة ومشرفين ومشرفات واعضاء وعضوات

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Com plete the follow ing with the scientific exp iration

1)The four basic physical quantities are
,.......,.........and..........

2)the velocity of an object after 3 second initially at rest and moves with cons tant acceleration of 10 m/sec2 is…………………..

3)If 1 mile =1609.344 meters and 1hour = 3600 secnds then the 55 mph equal ...................M/sec

4)We have a vector A of 3.0 units in length and points along the positivex axis,and vector B of 4.0 units in length and points along the negative yaxis the magnitude and direction of the vector C which equal to a+b are …………………….. and

2-Answer the follow ing question
· 1-which of the equations below are dimensionally correct ?
+at B)y=(2m)cos (kx) A)v=v0


· 2- Avector has xcom pon ent of -15units and y com pon ent of 20 units.find the magnitude and direction of this vector ?