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A 5.50 x 105 kg subway train is brought to a stop from a speed of 0.600 m/s in 0.900 m by a large spring bumper at the end of its track. What is the force constant k of the spring?
If the wire is heated to 40.0°C while the 7.0-V potential difference is maintained, what is the resulting current in the wire
Xu is a new material discovered by a TA. The specific heat C and latent heat L of Xu are measured by heating up a piece of Xu sample. The temperature T (in K) of Xu sample varying as a function of heat Q (in 103 J) transferred to it.
In a typical fender bender, a 1500 kilogram car traveling at 48 kilometer per hour collides in elastically with a 1200 kilogram car traveling at 32 kilometer per hour in the similar direction. Determine how much of the initial kinetic energy of th..
Consider a bright star in our night sky. Assume its distance from Earth is 89.4 light-years (ly) and its power output is 4.00 multiply.gif 1028W, Find the intensity of the starlight at the Earth
a segment of wire of total length 2m is formed into a circular loop having 5 turns if the wire carries a 1.2A current determined the magnitude of the magnetic field at the center of the loop
Find the mans rate of sweat production
This isotope can also decay by ?-emission. What is the energy release in this case? What is the maximum kinetic energy of the emitted ?-particle
Sam jogs for 15 minute at 240 m/min, walk the next 10 minute at 90m/min, rests for 5 minute, and jogs back to where she started at 180 m/min. Find the Sam's displacement from start to finish
The sprint in spring gun has a force constant of 3.0 lb/in. It is compressed 1.5 in. from its natural lenght, with what speed will the ball leave the gun when released
A hollow conducting sphere has an inner radius of r1 = 0.11 m and an outer radius of r2 = 0.29 m. The sphere has a net charge of Q = 6.5E-06 C. What is the magnitude of the field at a distance of 0.05 m from the center of the sphere
an arrow starting from rest leaves the bow with a speed of 24.0 ms. if the average force exerted on the arrow by the
A hydraulic press has one piston of diameter 2.0 cm and the other piston of diameter 8.0 cm. What force must be applied to the smaller piston to obtain a force of 1600 N at the larger piston:
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