Digital thermometers often make use of thermistors, a type of resistor with resistance that varies with temperature more than standard resistors. find the temperature coefficient of resistivity (in (°c)−1) for a linear thermistor with resistances of 80.2 ω at 0.00°c and 224 ω at 522°c.

You have been hired to design a spring-launched roller coaster thatwill carry two passengers per car. the car goes up a 10-m highhill, then descends 15m to the track's lowest point. you'vedetermined that the spring can be compressed a maximum o 2.0m andthat a loaded car will have a maximum mass of 400kg. for safetyreasons, the spring constant should be 10% larger than the minimumneeded for the car to just make it over the top. a) what spring constant (k) should you specify ? b) what is the maximum speed of a 350 kg car if the spring iscompressed the full amount.