The orion project, famously led by physicist freeman dyson in 1958, would have used atomic bombs to propel a spacecraft potentially to interstellar speeds. the project was, however, considered dead after 1963. why was the project abandoned? select one: a. the concept was considered technically infeasible by the team that researched the technological application of nuclear propulsion. b. the partial test ban treaty of 1963 prohibited the use of nuclear weapons in space. c. there was a lack of volunteers willing to make the sacrifice of a multi-generational one-way voyage into the unknown. d. all of the above

Pls pls pls pls ! describe, in your own words, how you found the epicenter of the earthquake.

What is a neurotransmitter involved in mood reward, addiction, and motor behaviors?

Search coils and credit cards. one practical way to measure magnetic field strength uses a small, closely wound coil called a search coil. the coil is initially held with its plane perpendicular to a magnetic field. the coil is then either quickly rotated a quarter-turn about a diameter or quickly pulled out of the field. (a) derive the equation relating the total charge q that flows through a search coil to the magnetic-field magnitude b. the search coil has n turns, each with area a, and the flux through the coil is decreased from its initial maximum value to zero in a time ∆t. the resistance of the coil is r, and the total charge is q = i∆t, where i is the average current induced by the change in flux. (b) in a credit card reader, the magnetic strip on the back of a credit card is rapidly “swiped” past a coil within the reader. explain, using the same ideas that underlie the operation of a search coil, how the reader can decode the information stored in the pattern of magnetization on the strip. (c) is it necessary that the credit card be “swiped” through the reader at exactly the right speed? why or why not?