En un experimento de laboratorio los ingenieros quieren saber la temperatura en la que un cuerpo de plomo alcanza los 25,43 m de longitud cuando inicialmente se mantiene en 25,34 m
a una temperatura de 26 ºC.
Coeficiente de dilatación lineal: 29 × 10-6 ºC -1

Could someone me find the answer to this problem.

Suppose a wheel with a tire mounted on it is rotating at the constant rate of 2.15 times a second. a tack is stuck in the tire at a distance of 0.373 m from the rotation axis. noting that for every rotation the tack travels one circumference (a) find the tack's tangential speed. (b) what is the tacks radial acceleration?

1. a camcorder has a power rating of 19 watts. if the output voltage from its battery is 7 volts, what current does it use?answer units 2. a 1.5m wire carries a 6 a current when a potential difference of 57 v is applied. what is the resistance of the wire? yourunits 3. a clothes dryer uses about 2 amps of current from a 240 volt line. how much power does it use? yourunits 4.