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السلام عليكم ورحمة الله وبركاته
لوسمحتم ممكن تساعدوني بحل هالمسائل
ابغاها قبل الاحد
وراح اكون ممنونه لكم


Ex1: A tow truck is pulling a car out of a ditch by means of a steel cable that is 9.1 m long and has a radius of 0.50 cm . when the car just begins to move , the tension in the cable is 890 n . how much has the cable stretched? (y= 2.0 x10¹¹ N/m²)



Ex2: A solid , square pinewood raft measures 4.0 m on a side and is 0.30 m thick .
(A ) determine whether the raft floats in water, and (b) if so , how much of the raft is beneath the surface . (the pine wood density = 550 kg/m³)(Archimedes principle)




Ex3: A time and temperature sign on a bank indicates that the outdoor temperature is
-20 ºC . find the corresponding temperature on the Fahrenheit scale.


Ex4: A temperature of absolute zero occurs at -273.15 ºC . what is the temperature on the Fahrenheit scale?


Ex5: A lead section of the Alaskan pipeline had a length of 65m and a temperature of 18 ºC when it was installed. What is its
Change in length when the temperature drops to a frigid -45 ºC ?
(α lead = 29 x 10 ¯6)


Ex6: A 125 g block of an unknown substance with a temperature of 90.0 ºC is placed in a Styrofoam cup containing 0.326 kg of water at 20.0 ºC . the system reaches an equilibrium temperature of
22.4 º C . what is the specific heat , Cx , of the unknown substance if the heat capacity of the cup is neglected .