Homogeneous mixtures are also called ______________
Fill in the blank(s) with correct word
solutions
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A 0.50-m long solenoid consists of 1000 turns of copper wire wound with a 4.0-cm radius. When the current in the solenoid is 18 A, the magnetic field at a point 1.0 cm from the central axis of the solenoid is
A. 0.090 mT. B. 0.36 mT. C. 23 mT. D. 36 mT. E. 45 mT.
In a nuclear power reactor of the type used to generate electricity, a neutron bombards a uranium nucleus, causing it to split into two large pieces (fission fragments) plus two or three neutrons
Energy is released in this process in the form of electromagnetic radiation and kinetic energy. Which of the following is an accurate statement concerning what happens in such a fission process? A) The electrical energy generated comes from the kinetic energy of the incident neutrons. B) The electrical energy generated comes from chemical energy stored in the electron bonds of the uranium atom. C) Electrical energy is generated because the fission fragments are electrically charged, whereas the uranium was electrically neutral. D) An intermediate step involves the fusion of protons to form helium nuclei, and energy is released in this process. E) The total mass of the particles after fission is less than the total mass of the particles (uranium nucleus plus one neutron) before fission, and this decrease in mass ?m is converted into energy E, where E = ?mc2.
The strong force depends upon the electric charge of the particles involved
a. True b. False Indicate whether the statement is true or false
Enrico says that positive charge is created when you rub a glass rod with silk, and that negative charge is simply the absence of positive charge. Rosetta says that negative charge is created and that positive charge is the absence of positive charge. (She has heard that Ben Franklin should have reversed the signs he associated with the charges.) Which one, if either, is correct?
a. Enrico, because there really is only one kind of charge. b. Rosetta, because there really is only one kind of charge. c. Neither: although no charge is present originally, both types of charge are created through friction. d. Both: only one type of charge is created by friction at any one time. e. Neither: both negative and positive charge are present simultaneously in all solid materials on Earth and the process described involves a transfer of charge, not the creation of charge.