Neglect any effects due to thermal expansion of the wire

Reference no: EM13541361

A tungsten wire has a radius of 0.065 mm and is heated from 20.0 to 1425 oC. The temperature coefficient of resistivity is ? = 4.5 x 10-3 (Co)-1. When 190 V is applied across the ends of the hot wire, a current of 1.4 A is produced. How long is the wire? Neglect any effects due to thermal expansion of the wire.

Reference no: EM13541361

Questions Cloud

Athlete grips a light rope that passes over a low-friction : An athlete grips a light rope that passes over a low-friction pulley attached to the ceiling of a gym. A sack of sand precisely equal in weight to the athlete is tied to the other end of the rope. The athlete climbs the rope, sometimes speeding up an..

Specifications associated with commercial spectrophotometer : The specifications associated with a commercial spectrophotometer are: Diffraction grating with 600 groves per mm. Focal length,f, 370mm. Blaze angle, first order, 500 nm. What is the reciprocal of the linear dispersion? could the two emission lines ..

What is the rotational inertia of ruler around this pivot : A physical pendulum consists of a meter stick (of mass 0.3 kg) that is pivoted at a small hole drilled through the stick a distance x from the 50 cm mark. The meter stick is then released from rest (at a small angle from vertical) and allowed to o..

Determine the initial and the final pressures of refrigerant : A closed, stationary, rigid tank contains Refrigerant 134a, initially at 100oC. The refrigerant is cooled until it becomes saturated vapor at 20oC. Determine the initial and the final pressures of the refrigerant and the heat transfer during the proc..

Neglect any effects due to thermal expansion of the wire : A tungsten wire has a radius of 0.065 mm and is heated from 20.0 to 1425 oC. The temperature coefficient of resistivity is ? = 4.5 x 10-3 (Co)-1. When 190 V is applied across the ends of the hot wire, a current of 1.4 A is produced. How long is the w..

What are the undamped-resonant frequncies of the oscillator : The frequency of a slightly damped harmonic oscillator is Fd=1000 Hz. The amplitude of this oscillator drops to 1/(e^10) after 25 cycles. What are the undamped and resonant frequncies of the oscillator

Undamped and resonant frequencies of the oscillator : The frequency of a slightly damped harmonic oscillator is fd=1000 Hz. The amplitude of this oscillator drops to 1/e^(10) after 25 cycles. What are the undamped and resonant frequencies of the oscillator.

A cyclist is moving down a steep hill : A cyclist is moving down a steep hill that has a grade of 20%. The rider is traveling at 3.5 m/s. The combined weight of the rider and cycle is 800N and the dynamic coefficient of friction between the tires and the road is 0.7. If the rider sudden..

Find the final volume of the gas : A 1.60-mol sample of helium gas initially at 300 K, and 0.400 atm is compressed isothermally to 1.60 atm. Note that the helium behaves as an ideal gas. Find the final volume of the gas.

User Account

All Pages