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A shortwave radio antenna is constructed from circular tubing, as is illustrated in Fig. P9.79. Estimate the wind force on the antenna in a 100-km/hr wind.
A curve in a highway has radius of curvature 110 m and is banked at 3.4°. On a day when the road is icy, what is the safest speed to go around the curve
If 1800J of heat are added to a 190-g object, its temperature increases by 10o C. What is the heat capacity of this object
An electron enters a region of space containing a uniform 0.0000143 T magnetic field. Find the radius of the electron's path
A small speaker of mass three kilogram is swinging as a simple pendulum on the rope of length 0.6 m while emitting a sound of a single frequency f and power 107 W. Discover the frequency of the sound emitted from the speaker when the pendulum is at ..
As a 1240-kg truck travels up a 15.4-m-high hill, the nonconservative forces of friction and the force generated by the engine do work on the truck. determine the change in the truck's kinetic energy
A steel wire in a piano has a length of 0.60- m and a mass of 4.5 x10-3 kg. To what tension must this wire be stretched in order that the fundamental vibration correspond to middle C (fC = 261.6 Hz on the chromatic musical scale).
The concrete wall of a building is 0.0972 meter thick. The temperature inside the building is 17.8 °C, while the temperature outside is 0.0 °C. Determine what is the emissivity of the wall
A uniform, cylindrical pulley of mass M=12.7 kg and radius R=0.636 m rotates freely about a fixed horizontal axis. What is the magnitude of the angular acceleration of the pulley
Consider 5.00 mol of liquid water. What volume is occupied by this amount of water? The molar mass of water is 18.0 g/mol
A 100g piece of gold that is heated to 160C and placed in 200g of 20C water. What is the equilibrium temperature if the specific heat of gold is 0.128J/gC and specific heat of water is 4.18 J/gc?
a rocket is launched and attains a speed of 5400 ms when 62000 m above the earth. if the engines shut down how much
The horse on a carousel is 3.5m from the central axis. How fast is a child on the horse going
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