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the pericarppart of a popcorn kernel is a small container of liquid water. when the poppcorn is heated to about 180 degrees C, the pericarp walls burst, and the liquid vaporizes so rapidly that the vapor explodes the rest of the kernel to many times its original volume. if the water has a mass of 4 mg, what is the change in entropy of the water due to the vaporization and expansion?
A ray of light passing through water struck the water glass interface making an angle 50 with the interface. find the angle of refraction of the light in glass
an object with a mass of 4kg is on a table and 2m away from another object with mass 10kg. find the center of gravity of these objects
A nail projects 25.0 mm horizontally outward from a wall. A 400 N picture is hung from the end of the nail and the nail deflects downward by 2.00 x 10^-5. what is the diameter of the nail
a Dog Sit 1.5m from the center of a merry go round. The Merry Go Round is Set in Motion,The Dog tangential speed is 1.5m/s. What is The Dog's Centripetal acceleration
After a plant or animal dies, its 14C content decreases with a half-life of 5730 years. If an archaeologist finds an ancient firepit containing partially consumed firewood, what is the age of the ancient site
A thin, uniform rod is hinged at its midpoint. To begin with, one-half of the rod is bent upward and is perpendicular to the other half. What is the angular velocity of the straight rod
A mass of 2.80 kg is attached to a single spring such that the maximum velocity of the oscillation is 2.47 m/s and period is 1.82 seconds. What is the amplitude of the oscillation
Many people mistakenly believe that the astronauts orbiting the earth are "above gravity." Compute the acceleration because of gravity, g, for space shuttle territory, 245 kilometres above the earth's surface (dashed line in sketch). Earth's mass ..
The spin cycles of a washing machine have two angular speeds, 431rev/min and 622rev/min . The internal diameter of the drum is 0.440m. Find the laundry's maximum tangential speed
A 64kg human sprinter can accelerate from rest to 10 m/s in 3.0s. What is the average power output of the greyhound
The mass of the Moon is 7.35 × 10^22 kg, whereas that of Earth is 5.98 × 10^24 kg. The average distance from the center of the Moon to the center of Earth is 384,400 km.
A small object with a mass of 380 mg carries a charge of 35.0 nC and is suspended by a thread between the vertical plates of a parallel-plate capacitor. The plates are separated by 5.00 cm. If the thread makes an angle of 12.0° with the vertical, ..
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