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To a first approximation, the velocity of sound in air for different temperatures can be calculated as v=(331+0.6T) m/s, where T is the temperature in Celsius. You see lightning on a warm summer night (25 C) and hear the thunder 3 seconds later. How far away was the lightning? Express your answer in kilometers.
Suppose manufactures increase in size of compact disks. By what factor will the moment of inertia increase
A uniform can with mass M and height H is filled to the top with water. The initial mass of the water is 2M, What is the minimum height of the center of mass as the water drains out
A frictionless pulley has the shape of a uniform solid disk of mass 2.1 and radius 10. A 1.10 stone is attached to a very light wire that is wrapped around rim of pulley and the system is released from rest.
A parallel-plate capacitor has a plate area of 1cm^1 and a plate separation of 2.5 mm. To obtain an electric field of 1.0*10^6N/m between the plates, the magnitude of the charge on each plate should be.
A 10.0 kg crate slides along a horizontal frictionless surface at a constant speed of 4.0 m/s. What is the speed of the crate when it arrives at the lower surface
A large population of aloha users manage to create 50 request/sec,including both originals and retransmissions.time is slotted in units 40msec.
If the phase angle for a block-spring system in SHM is pi/6 rad and the block's position is given by x = xm cos(wt + pi). what is the ratio of the kinetic energy to the potential enery at time t = 0
You're carrying a 3.6-m-long, 25kg pole to a construction site when you decide to stop for a rest. You place one end of the pole on a fence post and hold the other end of the pole 35cm from its tip.
The coefficient of expansion of iron and zinc
Three thin uniformly charged shells A, B and C, with radii R, 2R , 3R respectively are placed one inside the other, What is the electric potential at radius 2R
A particle moves along with a velocity of v=2t^3-32 m/s, where t is in seconds. At t_o= 0 seconds, s_o= 0 meters. Determine the particle's total distance traveled from 0 to 4 seconds
The current density from the axis in the wire of radius R is given by J = cr^0.5 (r is powered to one-half), Draw the current density as a function of r graph
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