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A steel rod with a length of l = 1.55 m and a cross section of A = 4.84 cm2 is held fixed at the end points of the rod. What is the size of the force developing inside the steel rod when its temperature is raised by ?T = 41.0 K? (The coefficient of linear expansion for steel is ? = 1.17×10-5 1/K, the Young modulus of steel is E = 200 GPa.)
Suppose the image of an object is upright and magnified 1.69 times when the object is placed 14cm from a lens
Consider two concentric thin wall steel tubes, the larger one closed at the bottom and the inner one open. What must be the relationship between the radii of the tubes
The filament of a light bulb has a temperature of 2.97 x 103 °C and radiates 60.0 W of power. Find the surface area of the filament
A 0.350-{\rm m}-long cylindrical capacitor consists of a solid conducting core with a radius of 1.25mm, Calculate the energy stored in the capacitor when fully charged
The famous horse & cart physics scenario is explained. This scenario is used to describe why many people have a common misconception about what Newton’s 3rd Law says & does not say.
TV-reception antennas for VHF (channels 2 through 13) are constructed with cross wires supported at their centers, What is the frequency for channel 4
A rectanglar block of iron 9.68x10^-8 ohms has dimensions 1.20 X 1.60 X 2.50 cm, What is the minimum resistance of the block
An electrically neutral model airplane is flying in a horizontal circle on a 4.0-m guideline, which is nearly parallel to the ground. Find the magnitude of the charges
A drop of water on a countertop reflects light from a flower held 3.10 cm directly above it. What is the focal length of the water drop
A small fly of mass 0.21g is caught in a spider's web. What is the value of the effective spring stiffness constant k for the web
A bumper car with mass m1 = 115kg is moving to the right with a velocity of v1 = 4 m/s. A second bumper car with mass m2 = 95 kg is moving to the left with a velocity of v2 = -3.7 m/s. The two cars have an elastic collision. Suppose the surface is fr..
A thin rod consists of two parts joined together. One-fourth of it is silver and three-fourths is gold. The temperature decreases by 21 C°.
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