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A construction company is building a dam. The construction engineers want to calculate the thickness of the concrete wall to retain water. The water depth right next to the dam will be 100m. What should be the thickness of the retaining wall on the bottom, given that 0.1m-thick wall can stand up to 5 kN/m2?
A guitar string is vibrating in its fundamental mode, with nodes at each end. The length of the segment of the string that is free to vibrate is 0.385 m. What is the amplitude of this standing wave
An airboat with mass 4.36 102 kg, including the passenger, has an engine that produces a net horizontal force of 8.24 102 N, Find the acceleration of the airboat
q. in a youngs interference experiment the two slits are separated by 0.17 mm and the incident light includes two
Light containing two dissimilar wavelengths passes during a diffraction grating with 1000 slits/cm. On a screen 17.0 cm from the grating, the third-order maximum of the shorter wavelength falls midway among the central maximum and the first side maxi..
A bucket of water with a mass of 2kg is attached to a rope that is wound around a cylinder. The cylinder has a mass of 3 kg and is mounted horizontally on frictionless hearings. The bucket is released from rest.
A 53-kilogram mountain climber, starting from rest, climbs a vertical distance of 768 meter. At the top, she is again at rest. Calculate her efficiency as a heat engine
on a warm 30 degree celcius spring day you are watching richard take a buzzer and twirl it horizontally around on the end of a 2.0 meter long string. what is the angular speed
Compare the electric force holding the electron in orbit (r=0.53×10?10m) around the proton nucleus of the hydrogen atom, What is the ratio of these two forces
A solenoid with a cross-sectional area of 1.77 x 10-3 m2 is 0.716 m long and has 465 turns per meter. Find the induced emf in this solenoid if the current in it is increased from 0 to 2.00 A in 45.9 ms
an airplane whose airspeed is 550 kmh heads due north. but a 80 kmh wind coming from the east suddenly begins to blow.
In a circut all six resistors share the same value R. Calculate the equivalent resistance between points A & B
A typical adult human lungs contain about 270 million tiny cavities called alveoli. Calculate the average diameter of a single alveolus
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