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A 160 kg horizontal beam is supported at each end. A 300 kg piano rests a quarter of the way from one end. What is the vertical force on each of the supports?
An aluminum cylinder is suspended in an unknown fluid by a spring scale. Outside the fluid, the object weighs 20N. In the fluid it weighs 10N. what is the density of the fluid
If the wet bulb temperature of a parcel at 1000mb is 60F and its mixing ratio is 6 g/kg, find the relative humidity of the parcel after it is lifted dry adiabatically to 900mb. Assume a constant latent heat of vaporization of 2.47 x 10^6 J/kg.
An antenna radiates with U(x,0)=1 for -1
A copper rod of length 0.78 m is lying on a frictionless table (see the drawing). What must be the direction of the current in the copper rod
A uniform thin rod of length 0.778 m is hung from a horizontal nail passing through a small hole in the rod located 0.043 m from the rod\'s end
The power dissipated in a series RCL circuit is 56.3 W, and the current is 0.273 A. Determine the voltage of the generator
A fisherman notices that his boat is moving up and down periodically without any horizontal motion, owing to waves on the surface of water. It takes a time of 2.30s for the boat to travel from its highest point to its lowest, a total distance of 0...
Larger animals have sturdier bones than smaller animals. A mouse's skeleton is only a few percent of its body weight, compared to 16% for an elephant. what fraction of the tensile strength is the stress on the femur
One of the most efficient engines ever built is a coal-fired steamturbine in the Ohio valley, driving an electric generator as itoperates between 1870°C and 430°C. What is its maximum theoretical efficiency
An archer wishes to shoot an arrow at a target at eye level a distance of 43.5 m away. what angle should the arrow make with the horizontal
An unknown substance has a mass of 0.125 kg and an initialtemperature of 95.0°C. calculate the specific heat of the unknown substance
The blade on a table saw spins at 3450 rpm. Its diameter is 25 cm. What is the speed of a tooth on the edge of the blade
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