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A stone is dropped into a deep well and is heard to hit the water 3.41 s after being dropped. Determine the depth of the well.
A 0,52 um thick soap film (n=1,41) in air is illuminated with white light in a direction perpendicular to the film. For what wavelength in the range 350-700 nm is there : a) fully constructive interferences b) fully destructive interference in the re..
A person with a near-point distance of 29 cm is able to get a usable magnification of 12 with a particular magnifying glass. What is the friend's near-point distance
An object 3.25 cm high is placed 18.0 cm in front of a convex mirror with radius of curvature of 8.30 cm. Where is the image formed
Calculate the per capita energy use for China and India. The populations of each country should be obtained from reliable sources. Express your final answer in units of kcal per day per person.
In exercising, a weight lifter loses 0.123 kg of water through evaporation, find the change in the internal energy of the weight lifter
When a "dry-cell" flashlight battery with an internal resistance of 0.37 ? is connected to a 1.56-? light bulb, Find the ratio Pwet/Pdry of the power delivered to the bulb by the wet-cell battery to the power delivered by the dry-cell battery
Initially, the translational rms speed of a molecule of an ideal gas is 460 m/s. The pressure and volume of this gas are kept constant, find the final translational rms speed of the molecules
A tensile specimen has a 10mm minimum diameter and a 50mm guage lenght. The stress and strain follow a linear behaivour before the applied load reaches 8 x 10^4 N, what is the young modulus for this material
for an initial velocity of 15 m/s and a launch of 55 degrees, where will the projectile strike the side of the hill
The one arm of a centrifuge is a solid cylinder ofaluminum with a length of 0.10 m and a cross sectional area of 1.3x 10-4. By how much does the aluminum rod stretch
A toy car with a mass of 120 g moves to the right with a speed of 0.43 m/s. What is the change in speed of the car
A student drops two metallic objects into a 120-g steel container holding 150 g of water at 25°C. One object is a 230-g cube of copper that is initially at 85°C, What is the mass of the aluminum chunk
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