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Water flows from a two-dimensional open channel and is diverted by an inclined plate as illustrated in Fig. P5.81. When the velocity at section (1) is 10 ft/s, what horizontal force (per unit width) is required to hold the plate in position? At section (1) the pressure distribution is hydrostatic, and the fluid acts as a free jet at section (2). Neglect friction.
An athlete rotates a 1.00-kg discus along a circular path of radius 1.04 m, Determine the magnitude of the maximum radial acceleration of the discus
A molecule of DNA (deoxyribonucleic acid) is 2.35 µm long. The ends of the molecule become singly ionized: Determine the effective spring constant of the molecule
A car starts from rest at a stop sign. It accelerates at 4.0 m/s2 for 9 seconds, coasts for 6 s, How far apart are the stop signs
A 3 meter long 200kg steel beam extends horizontally from the point where it has been bolted to the framework of a new building under construction.
define what is the unknown capacitance. what focal length eyepiece should she use.
The activity of a radioactive source decreases by 5.2% in 28 hours. What is the half-life of this source
What should be the length of a side, in centimeters? (Use the conversion 1 gallon = 3.786 liter.)
The image of a tree on a 35 mm color slide is 1.7 mm high. It is to be projected onto a screen 8.0 m from the slide, and is to appear 559 mm high. What is the magnification of the system
A box of mass m = 3.50 kg is given a push down an inclined plane which makes an angle of 30 degree with the horizontal. The box moves at 2.00 m/s when it is 30.0 cm vertically above the top of the spring, and the coefficient of kinetic friction betwe..
The gap between valence and conduction bands in silicon is 1.12 eV. How many electrons can be excited from the top of the valence band to the bottom of the conduction band by the absorption of this gamma ray
A helicopter is ascending vertically with the speed of 8 m/s. At a height of 65m above the Earth, a package is dropped from a window.
A toy cannon uses a spring to project a 5.34 g soft rubber ball. The spring is originally compressed by 5.09 cm and has a force constant of 7.98 N/m. With what speed does the projectile leave the barrel of the cannon
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