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A vacuum-filled parallel plate capacitor has an energy density of 0.1 J/m^3 and the plates are separated by 0.2 mm. An electron is released from rest near negativity charge plate of the capacitor. How fast is the electron moving when it reaches the positively charged plate?
A puck is sliding without friction on the ice at a speed of 2.48 m/s. Find the speed and direction of the second puck after the collision
A 20 times telescope has a 12{rm cm}diameter objective lens. What minimum diameter must the eyepiece lens have to collect all light rays from an on-axis distant source.
A parallel-plate capacitor is made from two plates 12.5 cm on each side and 4.20 mm apart. Half of the space between these plates contains only air, but the other half is filled with Plexiglas of dielectric constant 3.40.
an ammonia molecule nh3 has a permanent electric dipole moment 5.0 10-30 cm. a proton is 1.8nm from the molecule in
An object placed 14.6 cm from a concave mirror produces a real image 7.90 cm from the mirror. where is the new image located as measured from the mirror
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
an electric toothbrush rests on a stand containing a 50-turn coil connected across the 120-v rms ac power line. inside
An open-ended organ pipe has a length of 0.5 m. If the speed of sound in air is 345 m/s, find (a) the pipe's fundamental frequency and wavelength, (b) the frequency and wavelength of its third overtone, and (c) the frequency and wavelength of its thi..
You are on an unknown planet. You throw an object straight up with an initial speed of 5ms. It takes 6 seconds for the object to return to your hand. Will the object's maximum height be higher or lower on the earth? What is the gravitational accelera..
A bowling ball made for a child has two thirds the radius of an adult bowling ball. By what factor is the mass of the child's ball reduced compared with the adult ball
Two coils are at fixed locations. When the current in coil 2 increases at a rate of 15 A/s, the emf in coil 1 is 25 mV. Find their mutual inductance
a. What do you you understand by paradoxes of human condition? Explain the religious perspectives of human condition. b. A family is viewed as a basic unit of socialization in any community; however, there has emerged other types of families such a..
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