صباح777
10-02-2011, 20:17
كيف حالكم اعضاء فيزيائيين العرب
انا حاليا ادرس كلية الطب جامعة الكرازنة باوكرانيا وعندي كم مسألة باللغة الانكليزية صعبت علية كتير اذا ممكن المساعدة
A rigid object rotates with angular velocity that is given by w(t)=4 rad /s - (8 rad/s3)t
a) Calculate the angular acceleration as a function of time.
b) Calculate the instantaneous angular acceleration B at t=2sec. , and the average angular acceleration B av. for the time interval t=0 to .t=2sec.
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5. Water is flowing in a circular pipe of varying cross section. At one place in the pipe the radius of the pipe is r1 = 0.2 m. What must the water velocity be at this point if the volume flow rate in the pipe is 0.8 m3•s-1? At a second point in the pipe the water velocity is = 3.8 m•s-1. What is the radius of the pipe at this point?
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9. Water at 20°C (η = 1005 μPa•s) flows with a speed of 0.35 m•s-1 through a pipe of diameter 3 mm. What is the Reynolds number? What is the nature of the flow?
اكون ممنونة الكم وشاكرة جدا يعني عندي امتحانات نهاية السمستر الاولولازم الكة حل المسائل
انا حاليا ادرس كلية الطب جامعة الكرازنة باوكرانيا وعندي كم مسألة باللغة الانكليزية صعبت علية كتير اذا ممكن المساعدة
A rigid object rotates with angular velocity that is given by w(t)=4 rad /s - (8 rad/s3)t
a) Calculate the angular acceleration as a function of time.
b) Calculate the instantaneous angular acceleration B at t=2sec. , and the average angular acceleration B av. for the time interval t=0 to .t=2sec.
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5. Water is flowing in a circular pipe of varying cross section. At one place in the pipe the radius of the pipe is r1 = 0.2 m. What must the water velocity be at this point if the volume flow rate in the pipe is 0.8 m3•s-1? At a second point in the pipe the water velocity is = 3.8 m•s-1. What is the radius of the pipe at this point?
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9. Water at 20°C (η = 1005 μPa•s) flows with a speed of 0.35 m•s-1 through a pipe of diameter 3 mm. What is the Reynolds number? What is the nature of the flow?
اكون ممنونة الكم وشاكرة جدا يعني عندي امتحانات نهاية السمستر الاولولازم الكة حل المسائل