Question

1. A healthy diastolic blood pressure at the level of the heart is about 104 Pa. Assuming blood has a density of 1.1 g/cm3, what is the diastolic blood pressure in the feet of a standing person if his heart is 1.4 m above the ground?
A) 104 Pa
B) 1.1 104 Pa
C) 1.4 104 Pa
D) 1.5 104 Pa
E) 1.6 104 Pa

2. A horizontal pipe has a part with a diameter 1/3 of the rest of the pipe. If v is the speed of the fluid in the wider section, then the speed in the narrower section is:
A) v/9
B) v/3
C) v
D) 3v
E) 9v

3. The part of an iceberg that extends above the water for ice density of 0.9g/cm3 and salted water of 1.1 g/cm3 is
A) 9%.
B) 18%
C) 20%
D) 80%.
E) 82%
F) 91%

4. The weight of a solid metal object in air is 25 N and the apparent weight in water (=1g/cm3) is 20 N. It's density is
A) 1 g/cm3
B) 2 g/cm3.
C) 5 g/cm3
D) 10 g/cm3
E) 20 g/cm3

10-14. A 2 kg object in simple harmonic motion obeys the following position versus time equation: y = (0.25 m) sin (πt).
10. What is the amplitude of vibration?
A) 0.25 m
B) 0.50 m
C) 0.75 m
D) 1.0 m
E) 0.5 π m

11. What is the frequency of the vibration?
A) 0.25 Hz 2πft = πt
B) 0.50 Hz
C) 1 Hz
D) 4 Hz
E) 0.5 π Hz

12. What is the maximum velocity ?
A) 0.25 m/s
B) 0.50 m/s
C) 1.0 m/s
D) 0.25 π m/s
E) 0.5 π m/s

13. What is the total energy of the system?
A) 1.23 J
B) 2.46 J
C) 4.92 J
D) 9.9 J
E) 0 J

14. What is the magnitude of the force acting on the mass after 2 s ?
A) 1.23 N
B) 2.13 N
C) 2.46 N
D) 4.92 N
E) 0 N

Answer 1