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A block of mass ‘m' is suspended from the ceiling of a stationary standing elevator through a spring of spring constant ‘k'. Suddenly the cable breaks and the elevator starts falling freely. Show that the block now executes a simple harmonic motion in the elevator. Find the amplitude.
A platinum wire is used to determine the melting point of indium.The resistance of the platinum wire is 2.000 Ω at 20 degrees Celsius and increasesto 3.072 Ω as indium starts to melt. What is the melting point of indium?
What voltage is required to charge a parallel combination of the two capacitors to the equal total energy.
Two infinitely large sheets of charge are vertical, parallel to each other, and 24.0 cm apart. One of the sheets has a charge density of +4.60 x 10 -7 C/m2. Calculate the unknown sheet's surface charge density
A loudspeaker of mass 18.00 {rm kg} is suspended a distance of h = 1.20 {rm m} below the ceiling by two cables that make equal angles with the ceiling.
using planck's law, Evaluate the Stefan-Boltzmann constant and Evalute the constant in the wien displacement law
An antelope moving with constant acceleration covers the distance 77 m between two points in time 7.4 s. Its speed as it passes the second point is 15.5 m/s. What is its speed at first point.
When its engine of power 76 kW is generating full power, a small single-engine airplane with mass 680 kg gains altitude at a rate of 2.8 m/s. What fraction of the engine power is being used to make the airplane climb
Hydraulic engineers often use, as a unit of volume of water, the "acre-foot", defined as the volume of water that will cover 1 acre of land to a depth of 1 ft. A severe thunderstorm dumps 3.0 in. of rain in 30 min on a town of area 30 km2. What vo..
A 10 m beam of mass 340 kg extends over a ledge. The beam is not attached, but simply rests on the surface. How far from the edge of the ledge can the beam extend
Calculate the first-excited state energy (in eV) for an electron in a box (an infinite well) having a width of 0.050 nm
A +1 uC charge is held 10 cm directly above the origin. A -1 uC charge is held 5 cm directly to the right of the origin. What is the electric potential at the origin
An archer wishes to shoot an arrow at a target at eye level a distance of 49.0 m away. what angle should the arrow make with the horizontal as it is being shot
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