10. A 4.0 cm radius horizontal pipe gradually narrows down to 2.0 cm. When water flows in this pipe the pressure in these two sections is 32.0kPa and 24.0kPa, respectively. What is the rate of flow of water in the pipe (in Liters/s)? (1m3-1000 Liters) a) 3.6 li b) 1.3 c) 26.8 d) 7.1 e) 5.2
10. A 4.0 cm radius horizontal pipe gradually narrows down to 2.0 cm. When water flows in this pipe the pressure in these two sections is 32.0kPa and 24.0kPa, respectively. What is the rate of flow of water in the pipe (in Liters/s)? (1m3-1000 Liters) a) 3.6 li b) 1.3 c) 26.8 d) 7.1 e) 5.2
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Transcribed Image Text:معهد جلوبال
قبل ۲۵ دقيقة
10. A 4.0 cm radius horizontal pipe gradually narrows down to 2.0 cm. When water flows in this
pipe the pressure in these two sections is 32.0kPa and 24.0kPa, respectively. What is the rate of
flow of water in the pipe (in Liters/s)? (1m3=1000 Liters)
а) 3.6
b) 1.3
c) 26.8
d) 7.1
e) 5.2
11. A natural gas pipeline with a diameter 0.25 m delivers 1.55 cubic meters of gas per second.
What is the flow of the gas in the pipe line?
a) 31.6 m/s
b) 25.3 m/s
c) 18.5 m/s d) 35.7 m/s
e) 28.0 m/s
12. A 1.0 cm sphere of copper (specific gravity 8.9) is lowered by a string into a bucket of
gasoline (specific gravity 0.68). How much less does it seem to weigh?
a) 3.1 x 10 N
b) 4.4 x 10 N
c) 6.7 x 10°N d) 2.2 x 10 N
e) 8.7 x10 N
13. A blood vessel of radius r splits in to 3 vessels each with (r/4), if the velocity in the larger
vessel is v, then the velocity in each of the smaller vessels is:
a. 3v/16
b. v/3
c. 9v/4
d. 16v/3
e. v
14. When a man stands, his brain is 0.5 m above his heart. If he bends so that his brain is 0.4 m
below his heart, by how much does the blood pressure in his brain change?
(Assume density of blood is 1059.5 kg/m'.)
A) 13.3 kPa
B) 4.0 kPa
C) 13.1 kPa
D) 9.3 kPa
E) 16.6 kPa
15. If the radius of a nucleus is given by R = R.A" where R. = 1.20 x1015 m, calculate the density
of a nucleus that has A = 136. The mass of a nucleon (proton or neutron) is 1.67 x10-27 kg.
16. "K decays to "Ar with a half-life of 1.25 x 10° yr. Assume that rocks contain no "Ar when
they form, and that the only way "Ar can be present is through the decay of "K. If the ratio of
4"K to 4"Ar in a particular rock is found to be 1:3, what is the age of the rock?
A) 1.25 x 10° yr.
В) 2.50 х 10° уr.
С) 3.75 х 10° y.
D) 5.00 x 10° yr.
E) Cannot be determined without knowing how much "K was in the rock to begin with.
17. The radioactive Iodine 13'I isotope, which has a half life of 8.02 days, is uesed for the diagnosis
techniques of thyroid gland. A patient was administer 10 microgram of 131I. After 3 days, the
amount (in microgram) remaining in his body approximately?
A) 5.0
B) 7.7
С)3.1
D) 0
Ali
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