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Problem: Two cars collide head-on while each is traveling at 80 km/hr. Suppose all their kinetic energy is transformed into the thermal energy of the wrecks.
What is the temperature increase of each car? You can assume that each car's specific heat is that of iron.
Show all work, use additional paper if necessary.
you throw a rock with an initial horizontal velocity and it hits the ground at x meters away from your feet. what if a
The half life for the alpha decay of uranium 238 is 4.47x10^9 yrs old. Determine the age (in years) of the rock specimen that contains 60% of its original number of Uranium 238 atoms.
In a new (inelastic) collision, the same two bumper cars with the same initial velocities now latch together as they collide. What is the final speed of the two bumper cars after the collision
A 1328 kilogram car moving at 19.1 meter per second in the +x direction hits from behind a second car moving at 13 meter per second in the same direction. obtain the velocity of the first car after this sudden collision
There are four charges, each with a magnitude of 1.8 μC.Two are positive and two are negative. The charges are fixedat corners of a 0.25 m square, one to a corner, in such a way thatthe net force on any charge is directed toward the center of thes..
a person whose near-point distance is 5 cm wears a pair of glasses that are 2.2 cm from her eyes. with the aid of these
A 3.8 kg box is sliding down a surface that is inclined downwards by 30° below the horizontal. How much energy of the box has been lost (dissipated) by the friction
Assume the mirror is misaligned, so that the actual angle between the normal to the surface and due south is too large by 0.0020 degree. Find by how many meters will the reflected ray miss the detector
a 60.0-kg mass person wishes to push a 100-kg mass box across a level floor. the coefficient of static friction between
a car initially traveling at 29.0 ms undergoes a constant negative acceleration of magnitude 1.75 ms2 after its brakes
a microwave oven generates a sound level of 37.3 db when consuming 1.6 kw of power. estimate the fraction of this power
A disc rolls down an inclined plane of angle 30o (see figure). What is the acceleration of the disc (in m/s2)
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