Se fabrica un termómetro utilizando un par termoeléctrico y se verifica que el voltímetro indica 0,4V cuando la temperatura es de 0°C y 2,4V cuando es de 100°C. Suponiendo que el cambio en la tensión eléctrica es directamente proporcional al cambio en la temperatura, calcular cuánto indicará el voltímetro a una temperatura de 40°C.

Ablock of mass m = 2.5 kg is attached to a spring with spring constant k = 790 n/m. it is initially at rest on an inclined plane that is at an angle of 28 degrees with respect to the horizontal, and the coefficient of kinetic friction between the block and the plane is k = 0.14. in the initial position, where the spring is compressed by a distance of a = 0.18 m, the mass is at its lowest position and the spring is compressed the maximum amount. take the initial gravitational energy of the block as zero. b) if the spring pushes the block up the incline, what distance, l, in meters will the block travel before coming to rest? the spring remains attached to both the block and the fixed wall throughout its motion.

True or false: the cycle of seasons on the earth is caused by the tilt of the earth on its axis toward and away from the sun.

At 20∘c, the hole in an aluminum ring is 2.800 cm in diameter. you need to slip this ring over a steel shaft that has a room-temperature diameter of 2.804 cm . 1. to what common temperature should the ring and the shaft be heated so that the ring will just fit onto the shaft? coefficients of linear thermal expansion of steel and aluminum are 12×10−6 k−1 and23×10−6 k−1 respectively.