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Design a panel of length a = 2 m (along x), width b = 1.5 m, stiffened along the length with 5 blade stiffeners spaced at 25 cm. The panel is simply supported all around and it must carry a uniform load p = 248 kP a transverse to the panel.
Design the panel (skin and stiffeners) with a load factor of 2.5 and a resistance factor 0.4 on the first ply failure strength. Use the carpet plots for E-glass-polyester.
Assume a blade stiffener with a width-to-depth ratio w/h = 1 (see Figure, not to scale), and a depth-to-thickness ratio h/t = 5.
A helicopter rises vertically with a constant upward acceleration of 0.38 m/s^2 . As it passes an altitude of 20m , a wrench slips out the door. How soon does the wrench hit the ground? At what speed does the wrench hit the ground?
Explain what happened as the ice melted. Where do you think the energy goes when it is not raising the temperature?
a thin rod has a length of 0.694 m and rotates in a circle on a frictionless tabletop. the axis is perpendicular to the
suppose your body is rotated about an axis that 1 runs vertically through your spine or an axis that 2 runs
Two point charges Q1= 5.0 nanoC and Q2=-3.0 nanoC are separated by 35 centimeter. Obtain the potential energy of the pair of charges
A box is sliding down an incline tilted at an angle of 14 degrees above horizontal. The box is sliding down the incline at a speed of 1.7 m/s. How far does the box slide down the incline before coming to rest
Find the power a car engine contributes to speeding the 1300 kilogram car up to a highway speed of 65.0 mi/h in 17.0 second
Estimate the kinetic energy of the Mars with respect to the Sun as the sum of the terms, that due to its daily rotation about its axis
An astronaut on a strange planet discovers that she can jump a maximum horizontal distance of 17.0 m if her initial speed is 2.80 m/s. What is the free-fall acceleration on the planet? (Ignore air resistance.)
A solid cylinder of radius 0.35 m is released from rest from a height of 1.8 m & rolls down the incline as shown. Find the angular speed of the cylinder when it reaches the horizontal surface?
What is the maximum number of lines per centimeter a diffraction grating can have and produce a complete first-order spectrum for visible light
A laser beam of power 4.60 W and diameter 2.6 mm is directed upward on the circular face ( diameter of the face
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