physic

The resistivity of gold is at a temperature of 20°C. A gold wire, 1.8 mm in diameter and 14 cm long, carries a current of 480 ma. The power dissipated in the wire is closest to:

1. 👍 0
2. 👎 0
3. 👁 316
1. 0.25mW

1. 👍 0
2. 👎 0
posted by john

Similar Questions

1. physics honors

Suppose that pure gold was to be made into a very long, thin wire for high-end stereo systems. (Gold is often used because it does not oxidize so it makes very good electrical contacts). If the gold wire was to have a radius of

asked by thomas on May 31, 2012
2. Physics

A battery is used in an experiment and is connected by a 37.5 cm long gold wire with a diameter of 0.590 mm. If the battery has a voltage of 1.70 V and the resistivity of the wire is 2.4×10-8 Ω m, what is the current in the

asked by Brooklyn on March 9, 2017
3. Chemistry

Earth's oceans have an average depth of 3800 m, a total area of 3.63 108 km2, and an average concentration of dissolved gold of 5.8 10-9 g/L. (a) How many grams of gold are in the oceans? (b) How many cubic meters of gold are in

asked by Anonymous on August 25, 2013
4. Physics

A gold wire and a silver wire have the same dimensions. At what temperature will the silver wire have the same resistance that the gold wire has at 20°C?

asked by lindsey on February 28, 2013
5. help with physics

A gold wire and a silver wire have the same dimensions. At what temperature will the silver wire have the same resistance that the gold wire has at 20°C?

asked by lindsey on March 4, 2013
1. physics

Consider two copper wires with the same cross-sectional area. Wire A is twice as long as wire B. How do the resistivities and resistances of the two wires compare? CHECK ALL THAT APPLY Wire A and wire B have the same resistance.

asked by Anonymous on February 7, 2014
2. maths-mensuration

The boy having a gold coin of diameter 2cm and thickess 2mm to a goldsmith for melting and drawing into a wire of diameter 1mm . the gold smith gave back a wire of gold of length 76cm with diameter 1mm. if the wastage allowed in

asked by anoynomous on March 10, 2013
3. chemistry

A 4.90 g nugget of pure gold absorbed 255 J of heat. What was the final temperature of the gold if the initial temperature was 24.0°C? The specific heat of gold is 0.129 J/(g·°C).

asked by pjl on March 24, 2010
4. Science

How many number of gold atom are present in 0.6 gm of 18 carat gold.The 24 carat gold is taken as 100% pure gold.(atomic mass of gold=197a.m.u)

asked by Mole concept on April 20, 2015
5. College Chemistry/Lab Math

I think I have this problem figured out correctly, but is there anyone who can tell me if I'm doing something wrong. The question is... "One troy ounce of gold is worth \$380. There are 33.8 grams per troy ounce. You have a stock

asked by James on March 17, 2013

More Similar Questions