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A steel wire of length 1.97m with circular cross section must stretch no more than 0.270cm when a tensile (stretching) force of 400N is applied to each end of the wire. What minimum diameter dmin is required for the wire?
A 1x10^2-kg crate is being pushed across a horizontal floor by a force that makes an angle of 30.0° below the horizontal. The coefficient of kinetic friction is 0.25. What must be the magnitude of, so that the net work completed by it and the kine..
At this point, he throws a 39 yard forward pass straight down the field. Illustrate what is the magnitude of the football's resultant displacement?
A 175-g object is attached to a spring that has a force constant of 72.5 N/m, Find the locations of the object when its velocity is one-third of the maximum speed
The blackbody radiation emitted from a furnace peaks at a wavelength of 3.4 10-6 m(0.0000034 m). What is the temperature inside the furnace
The light energy that falls on a square meter of ground over the course of a typical sunny day is about 20 MJ. The average rate of electric energy consumption in one house is 1.0 kW. Find the energy consumption and area required by the solar cell
70 grams of water at 85°C are mixed with an equal amount of water at 15°C in a completely insulated container. How much heat is gained by the cold water
A 258-kg log is pulled up a ramp by means of a rope that is parallel to the surface of the ramp. The ramp is inclined at 30.0° with respect to the horizontal. The coefficient of kinetic friction between the log and the ramp is 0.980, and the log has ..
The aurora is caused when electrons and protons, moving in the earth's magnetic field of ?5×10?5 T, collide with molecules of the atmosphere, find Radius of the electron and proton in m
Find (a) magnitude and (b) direction of A - B. (Give the direction as a positive angle with respect to due east). Find out the (c) magnitude and (d) direction of B - A. (Give the direction as a positive angle with respect to due west).
A cylindrical air tank has dimensions diameter = 0.2m and height 0.8m, Calculate the mass of air in the tank (kg) (have to use ideal gas law, molecular weight of air)
The output voltage of an AC generator is given by ?v = (120 V) sin (80?t). The generator is connected across a 21.0-? resistor. Find the maximum current in the resistor
Suppose Fuzzy, a quantum-mechanical duck, lives in a world in which h = 2πJ • s. Fuzzy has a mass of 2.00 kg and is at first known to be within a pond 1.00 m wide.
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