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A bar of circular cross-section is loaded by a compressive force P = 100 kN. The bar has length L = 2.0 m and diameter d = 30 mm. It is made of aluminum alloy with modulus of elasticity E = 73 GPa. What is the strain of the bar? Express the answer in mm/m.
The radiation emitted by the primordial fireball of the big bang had a blackbody spectrum corresponding to about 3000 K. We can still see this radiation but now it has a spectrum corresponding to about 2.7 K. 1. What is this radiation called and why ..
Light shines through a single slit whose width is 7.40 10-4 m. A diffraction pattern is formed on a flat screen located 3.2 m away. The distance between the middle of the central bright fringe and the first dark fringe is 3.25 mm. What is the wavelen..
A person drives a car at a constant speed of 90 km/h along a straight line from point A to point B and then drives back along the line from B to A at a constant speed 110 km/h. What is her average speed over the entire trip?
To stretch a certain spring by 2.70cm from its equilibrium position requires 8.00J of work. What is the force constant of this spring
Plutonium has a half life of 2.4 × 104 years. How long does it take for 99% of the plutonium to decay, What is the binding energy of the 4He nucleus
The gap between the plates of a parallel plate capacitor is 6.9 mm. When the plates are charged with a 7.0 V battery, What is the magnitude of the electric field between the plates 3.45 mm from the negatively charged plate
consider a uranium nucleus to be a sphere of radius r 7.4 x 10-15 m with a charge of 92e distributed uniformly
The magnetic flux passing through a single loop in a transformer changes at a rate of 3 Wb/s. The primary coil has 90 loops and the secondary coil has 532 loops. Find the voltage in each coil.
You are asked to design an LR circuit with a time constant of 5 x10-4 seconds. You have at your disposal a real inductor (L = 0.02 H, R = 10 Ω) and a wide variety of resistors. What value resistor must you choose for the circuit?
A mass m=9.7 kg is suspended from a pulley with radius r=0.081 meters and moment of inertia I=0.26 kg/m^3. What is the net force of the system taking the block and pulley into consideration
Two farmers are standing on opposite sides of a very large empty field that is 520.6 m across. What is the temperature of the air
A 8.0-kg monkey climbs a uniform ladder with weight w = 1.37102 N and length L = 3.50 m as shown in the figure below. The ladder rests against the wall at an angle of θ = 53°.The upper and lower ends of the ladder rest on frictionless surfaces, by th..
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