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Question: A dam stands 12 ft high. It is 4 ft wide at the top and 10 ft wide at the base. The upstream face is vertical. The coefficient of friction between the darn and its foundation is 0.6. What are the factors of safety against sliding and overturning when the water has reached the top of the darn? The dam is made of concrete (density = 150 lb/ft3).
A spider crawling across a table leaps onto a magazine blocking its path. Compute how thick is the magazine
Make the simplifying assumption that the atoms are arranged in a "cubic" array, as shown in the figure. Remember to convert to SI units.
the security alarm on a parked car goes off and produces a frequency of 1110 hz. the speed of sound is 343 ms. as you
A simple harmonic oscillator consists of a block of mass 4.kg attached to a spring of spring constant 153 N/m. When t = 2 s, the position and velocity of the block are x = +0.129 m and v = +3.415 m/s.
In a hydraulic lift the radii of the pistons are 1.25 cm and10.0 cm. A car weighing 16.5 KN is to be lifted by the force of the larger piston, what force must be applied to the small piston
Two water samples are in well-insulated cups. The mass of onesample is 0.0610 kg and its temperature is 11.0o C. Theother sample has a mass of 0.0360 kg and its temperature is79.0o C.
High-speed stroboscopic photographs show that the head of a 240 g golf club is traveling at 44 m/s just before it strikes a 46 g golf ball at rest on a tee. Find the speed of the golf ball just after impact
A spring with a string constant of 23 N/m is stretched from equilibrium to 2.9 meter. Evaluate how much work is done in the process
A 220 g block is attached to a horizontal spring and executes simple harmonic motion with a period of 0.400 s. If the total energy of the system is 2.50 J. Discover the force constant of the spring. Discover the amplitude of the motion.
A particle has a charge of +2.3 ?C and moves from point A to point B, a distance of 0.13 m. The particle experiences a constant electric force, and its motion is along the line of action of the force.
The peak current through an inductor is 11mA. What is the current if the emf frequency is doubled
A thin film of alcohol (n=1.36) lies on a flat glass plate (n=1.51). What is the minimum thickness of the film
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