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A parabolic profile is desired in 20-C air as it passes between two parallel plates that are 80 mm apart in a university laboratory. If the Reynolds number Vh=n ¼ 1500, how long would the channel need to be to observe a fully developed flow, i.e., a parabolic velocity profile? What would be the average velocity?
The voltage across a membrane forming a cell wall is 74.0 mV and the membrane is 8.80 nm thick. What is the electric field strength
In the experiment you will observe well defined "bumps" in the string, and you will measure their length. What is the relation between this length and the wavelength of the wave
question1a block of mass m1 4 kg moves from rest under the influence of a varying force fx 4x 38 where f is in
During a solar eclipse, the Earth, Moon, and Sun all lie on the same line, with the Moon between the Sun and the Earth. Find what force is exerted on the Moon by the Sun
A centrifuge is a device in which a small container of material is rotated at a high speed on a circular path. How many revolutions per minute is the sample making
A car traveling at 22.0 m/sundergoes a constant deceleration of 1.90 m/s2when the brakes are applied. How many revolutions does each tire make
you need to use a monitor and lightweight cable to lift a 2.0 kg copper weight to a height of 3m. To do so, you've decided to use a 1000V power supply to charge a capacitor, what minimum capacitance do you need
A monatomic ideal gas expands on a linear process such that P=3V + P1 ( initial pressure.) P1 and V1 are the initial pressure and initial volume
Multiple-Concept Example 3 provides some pertinent background for this problem. Suppose a single electron orbits about a nucleus containing two protons (+2e), find the magnitude of the electron's centripetal acceleration
A 80-g bullet is fired from a rifle having a barrel 0.582 m long. Choose the origin to be at the location where the bullet begins to move. Then the force (in newtons) exerted by the expanding gas on the bullet is 14100 + 9100x - 24250x2, where x is i..
A person is observing the motion of a ball on a flat surface and measuring its position in time. What will be the velocity of the ball relatively to each of the two observers
Starting from rest, a 4.80-kg block slides 2.00 m down a rough 30.0° incline. The coefficient of kinetic friction between the block and the incline is ?k = 0.436. Determine the work done by the friction force
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