A hydraulic press for compacting powdered samples has a large cylinder which is 10.0 cm in diameter, and a small cylinder with a diameter of 2.0 cm. A lever is attached to the small cylinder as shown in (Figure 1). The sample, which is placed on the large cylinder, has an area of 4.0 cm2.
What is the pressure on the sample if F = 320N is applied to the lever?
In: Physics
A medical technician is trying to determine what percentage of a patient's artery is blocked by plaque. To do this, she measures the blood pressure just before the region of blockage and finds that itis 1.20×104 \(\rm Pa\), while in the region of blockage it is 1.15×104 \(rm Pa\). Furthermore, she knows that blood flowing through the normal artery just before the point of blockage is traveling at 30.0 \(rm cm/s\), and the specific gravity of this patient's blood is 1.06. What percentage of the cross-sectional area of the patient's artery is blocked by the plaque?
In: Physics
Water Flowing from a Tank
Water flows steadily from an open tank as shown in the figure. (Figure 1) The elevation of point 1 is \(10.0 \mathrm{~m},\) anc the elevation of points 2 and 3 is \(2.00 \mathrm{~m}\). The crosssectional area at point 2 is \(4.80 \times 10^{-2} \mathrm{~m}^{2} ;\) at point 3 where the water is discharged, it is \(1.60 \times 10^{-2} \mathrm{~m}^{2}\). The cross-sectional area of the tank is very large compared with the cross-sectional area of the pipe.
Part A
Assuming that Bernoulli's equation applies, compute the volume of water \(\Delta V\) that flows across the exit of the pipe in \(1.00 \mathrm{~s}\). In other words, find the discharge rate \(\Delta V / \Delta t\).
Express your answer numerically in cubic meters per second.
\(\frac{\Delta V}{\Delta t}= \mathrm{~m}^{3} / \mathrm{s}\)
In: Physics
A pair of vertical, open-ended glass tubes inserted into a horizontal pipe are often used together to measure flow velocity in the pipe, a configuration called a Venturi meter. Consider such an arrangement with a horizontal pipe carrying fluid of density \(p\). The fluid rises to heights \({h_{1}}\) and \({h_{2}}\) in the two open-ended tubes (see figure). The cross-sectional area of the pipe is A1 at the position of tube 1, and \({A_{2}}\) at the position of tube 2.
Part A.Find \({p_{1}}\), the gauge pressure at the bottom of tube 1. (Gauge pressure is the pressure in excess of outside atmospheric pressure.)
Express your answer in terms of quantities given in the problem introduction and \({g}\), the magnitude of the acceleration due to gravity.
Part B.Find \({v_{1}}\), the speed of the fluid in the left end of the main pipe.
Express your answer in terms of \({h_{1}},{h_{2}}, g,\) and either \({A_{1}}\) and \({A_{2}}\) or \(\gamma\), which is equal to \(\frac{A_{1}}{A_{2}}\)
In: Physics
What does the top pressure gauge in the figure read?
In: Physics
A 1.0-cm-diameter pipe widens to 2.0 cm, then narrows to 0.5 cm. Liquid flows through the first segment at a speed of 4.0m/s.
A: What is the speed in the second segment?m/s
B: What is the speed in the third segment?m/s
C: What is the volume flow rate through the pipe?L/s
In: Physics
To determine an athlete's body fat, she is weighed first in air and then again while she's completely underwater. It is found that she weighs 690 N when weighed in air and 48.0 N when weighed underwater. What is her average density?
In: Physics
A flask of water rests on a scale that reads 100 N. Then, a small block of unknown material is held completely submerged in the water. The block does not touch any part of the flask, and the person holding the block will not tell you whether the block is being pulled up (keeping it from falling further) or pushed down (keeping it from bobbing back up).
Mass (g) | Volume (cm^{3}) | |
A | 100 | 50 |
B | 100 | 200 |
C | 200 | 50 |
D | 50 | 100 |
E | 200 | 100 |
F | 400 | 50 |
In: Physics
A U-shaped tube, open to the air on both ends, contains mercury. Water is poured into the left arm until the water column is 11.3cm deep.
How far upward from its initial position does the mercury in the right arm rise?(In mm)
In: Physics
The container shown in (figure 1) is filled with oil. It is open to the atmosphere on the left.
In: Physics
It is said that Archimedes discovered the buoyancy laws when asked by King Hiero of Syracuse to determine whether his new crown was pure gold (SG = 19.3). Archimedes measured the weight of the crown in air to be 11.8 N and its weight in water to be 10.9 N. Was it pure gold?
In: Mechanical Engineering
Which of the following coenzymes participate in the reactions of the pyruvate dehydrogenase complex?
In: Biology
Which of the following is NOT one of the three stages of respiration?
In: Biology
Which of these is NOT a product of the citric acid cycle?
In: Biology
Which of these enters the citric acid cycle?
In: Biology