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A thermos contains 142 cm3 of coffee at 86.3°C. To cool the coffee, you drop two 10.1-g ice cubes into thethermos. The ice cubes are initially at 0 °C and meltcompletely. What is the final temperature of the coffee in degrees Celsius? Treat the coffee as if it were water.
The drain plug on a car's engine has tightened to a torque 25 m ? N . If a 0.15-m-long wrench is used to change the oil, what is the minimum force needed to loosen the plug
what is the speed of a 200g baseball with a de Broglie wavelength of .18nm, what is the de Broglie wavelength of a 200g baseball with a speed of 20 m/s
A starship blasts past the earth at 2.0\times 10^8\;{\rm{ {\rm m}/{\rm s}}}. With what speed does the laser beam approach the earth
A biology student uses a simple magnifier to examine the structural features of an insect's wing. The wing is held 3.60 cm in front of the lens, What angular magnification is achieved
A startled armadillo leaps upward rising 0.544 m in the first 0.202 s. What is its initial speed as it leaves the ground?
As a tennis ball is struck, it departs from the racket horizontally with a speed of 27.3 m/s. The ball hits the court at a horizontal distance of 19.3 m from the racket. How far above the court is the tennis ball when it leaves the racket?
q1. two 18 cm diameter charged disks face each other 25 cm apart. both disks are charged to - 30 nc. what is the
A certain engine can exert 75,000 kg m/sec/sec of force. Assuming that all the force is used to accelerate the vehicle on which the engine is mounted, how fast would the vehicle accelerate assuming that it masses 5,000 kg? Neglect friction/air res..
A double star is a system of two stars (say having massesm1 and m2) moving around the centre ofinertai of the system due to gravitation. Then find the ratio of sweeps of area of star of mass m1 to the star of massm2 ?
Suppose an observer measures the length of a stationary spaceship to be 6 m (note: m for meters). what is the length of the same spaceship
A dentist uses a spherical mirror to examine a tooth. The tooth is 1.06 cm in front of the mirror, and the image is formed 11.4 cm behind the mirror. Determine the mirror's radius of curvature. _____ cm. Determine the magnification of the image.
The number of electrons in a copper penny is approximately 10*10^23, How large would the force be on an object if it carried this charge and were repelled by an equal charge one meter away?
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