When Metal is drawn out into a wire is it a chemical change or physical change?

When Metal is drawn out into a wire is it a chemical change or physical change?
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Nichrome wire is used as a heating element I many appliances because (a) it can be drawn out into wires easily (b) it has high resistivity (c) it resists oxidation in air when red hot (d) both (b) and (c) are correct

Description : Nichrome wire is used as a heating element I many appliances because (a) it can be drawn out into wires easily (b) it has high resistivity (c) it resists oxidation in air when red hot (d) both (b) and (c) are correct

Last Answer : Ans:(d)

Pick out the wrong statement. (A) Tin can be readily and very easily drawn into very fine wire (B) Tin can be severely cold worked without the necessity of annealing due to its low recrystallisation temperature (C) Tin exists in two allotropic forms

Description : Pick out the wrong statement. (A) Tin can be readily and very easily drawn into very fine wire (B) Tin can be severely cold worked without the necessity of annealing due to its low recrystallisation temperature (C) Tin exists in two allotropic forms

Last Answer : (A) Tin can be readily and very easily drawn into very fine wire

`1kg` piece of copper is drawn into a wire `1mm` thick and another piece into a wire `2mm` thick. Compare the resistance of these wires.

Description : `1kg` piece of copper is drawn into a wire `1mm` thick and another piece into a wire `2mm` thick. Compare the resistance of these wires.

Last Answer : `1kg` piece of copper is drawn into a wire `1mm` thick and another piece into a wire `2mm` thick. Compare the resistance of these wires.

Is Melting coin being heated and turn black this is used as a test for metal a chemical or a physical change?

Description : Is Melting coin being heated and turn black this is used as a test for metal a chemical or a physical change?

Last Answer : hg

A wire of resistance `10 Omega` is drawn out so that its length is thrice its original length. Calculate its new resistance (resistivity and density o

Description : A wire of resistance `10 Omega` is drawn out so that its length is thrice its original length. Calculate its new resistance (resistivity and density o

Last Answer : A wire of resistance `10 Omega` is drawn out so that its length is thrice its original ... (resistivity and density of the material remain uncharged).

What are the sources of transverse vibration of a drawn wire ?

Description : What are the sources of transverse vibration of a drawn wire ?

Last Answer : 1. Length formula: If the tension of a vibrating wire and the mass of a single length remain unchanged , the frequency of the wire is disproportionate to the length. 2. Tension formula: If the ... , the frequency of the wire is disproportionate to the square root of the mass of a single length.

The arrow drawn through the resistor shown in the illustration indicates that it is _____________. EL-0086 A. for use in low power applications B. a carbon composition type C. a wire-wound type D. one whose resistance is variable

Description : The arrow drawn through the resistor shown in the illustration indicates that it is _____________. EL-0086 A. for use in low power applications B. a carbon composition type C. a wire-wound type D. one whose resistance is variable

Last Answer : Answer: D

A drawn wire of resistance 5 Q is further drawn so that its diameter becomes one-fifth of the original. ...

Description : A drawn wire of resistance 5 Ω is further drawn so that its diameter becomes one-fifth of the original. What is its resistance with volume remaining the same ? (a) 25 Ω (b) 125 Ω (c) 625 Ω (d) 3125 Ω

Last Answer : A drawn wire of resistance 5 Ω is further drawn so that its diameter becomes one-fifth of the original. What is its resistance with volume remaining the same ? (a) 25 Ω (b) 125 Ω (c) 625 Ω (d) 3125 Ω

If a metal can be drawn into wires relatively easily it is called: (1) malleable (2) ductile (3) extractive (4) tactile

Description : If a metal can be drawn into wires relatively easily it is called: (1) malleable (2) ductile (3) extractive (4) tactile

Last Answer : (2) ductile Explanation: Ductility is a physical property of a material associated with the ability to be hammered thin or stretched into wire without breaking.

If a metal can be drawn into wires relatively easily it is called: w) malleable x) ductile y) extractive z) tactile

Description : If a metal can be drawn into wires relatively easily it is called: w) malleable x) ductile y) extractive z) tactile

Last Answer : ANSWER: X -- DUCTILE

Change in length and cross-sectional area of metal wire changes A. current B. voltage C. resistance D. magnetic effect

Description : Change in length and cross-sectional area of metal wire changes A. current B. voltage C. resistance D. magnetic effect

Last Answer : resistance

Which of the following substances undergoes chemical change on heating? (1) Sodium chloride (2) Silica (3) Lead nitrate (4) Platinum wire

Description : Which of the following substances undergoes chemical change on heating? (1) Sodium chloride (2) Silica (3) Lead nitrate (4) Platinum wire

Last Answer : (3) Lead nitrate Explanation: Lead nitrate on heating decomposes to lead monoxide, nitrogen dioxide and oxygen. NO2 is liberated, along with oxygen, as a reddish brown gas.

Which of the following substances undergoes chemical change on heating? (1) Sodium chloride (2) Silica (3) Lead nitrate (4) Platinum wire

Description : Which of the following substances undergoes chemical change on heating? (1) Sodium chloride (2) Silica (3) Lead nitrate (4) Platinum wire

Last Answer : (3) Lead nitrate Explanation: Lead nitrate on heating decomposes to lead monoxide, nitrogen dioxide and oxygen. NO2 is liberated, along with oxygen, as a reddish brown gas.

Rohan had learnt that non-metals on beating with hammer are generally broken into pieces. Which of the following is a non-metal? a) iron nail b)aluminium wire c)copper wire d)piece of coal

Description : Rohan had learnt that non-metals on beating with hammer are generally broken into pieces. Which of the following is a non-metal? a) iron nail b)aluminium wire c)copper wire d)piece of coal

Last Answer : d)piece of coal

Is copper one pounded into sheets is a chemical or physical change?

Description : Is copper one pounded into sheets is a chemical or physical change?

Last Answer : This is a physical change.

Is a seed changing into a pumpkin chemical or physical change?

Description : Is a seed changing into a pumpkin chemical or physical change?

Last Answer : Need answer

Is turning bread into toast a physical or chemical change and why?

Description : Is turning bread into toast a physical or chemical change and why?

Last Answer : It is both. You dry the moisture out of the bread. However, thebrowning is a chemical change, as the chemical bonds arechanged.

Is liquid tree resin hardening into amber physical or chemical change?

Description : Is liquid tree resin hardening into amber physical or chemical change?

Last Answer : Physical... chemically, it's still the same substance,

Is liquid tree resin hardening into amber physical or chemical change?

Description : Is liquid tree resin hardening into amber physical or chemical change?

Last Answer : Physical... chemically, it's still the same substance,

Is wood sawed and made into a toy box a chemical or physical change?

Description : Is wood sawed and made into a toy box a chemical or physical change?

Last Answer : These are physical changes.

Which solid AWG wire size has the smallest physical cross-sectional area? A. 12 B. 14 C. 16 D. 18

Description : Which solid AWG wire size has the smallest physical cross-sectional area? A. 12 B. 14 C. 16 D. 18

Last Answer : Answer: D

What kind of metal is the cheapish silver wire that's sold in craft stores made out of?

Description : What kind of metal is the cheapish silver wire that's sold in craft stores made out of?

Last Answer : Here’s a picture of it. They just call it “beading wire” on the website, grrrr.

Is taking out your best silver spoons and know that it is very dull and it has black dots on them is it a chemical change or physical change?

Description : Is taking out your best silver spoons and know that it is very dull and it has black dots on them is it a chemical change or physical change?

Last Answer : What is the answer ?

What are the conductors of electric charge in electrically conductive metal wire ?

Description : What are the conductors of electric charge in electrically conductive metal wire ?

Last Answer : Free electrons in electrically conductive metal wires are conductors of electricity.

State Hooke’s law. Draw a labelled graph of tensile stress against tensile strain for a metal wire

Description : State Hooke’s law. Draw a labelled graph of tensile stress against tensile strain for a metal wire

Last Answer : State Hooke's law. Draw a labelled graph of tensile stress against tensile strain for a metal wire up ... the region in which Hooke's law is obeyed.

A metal wire of specific resistance `64xx10^(-6) Omega` m and length 1.98 cm has a resistance of `7 Omega`. Find its radius.

Description : A metal wire of specific resistance `64xx10^(-6) Omega` m and length 1.98 cm has a resistance of `7 Omega`. Find its radius.

Last Answer : A metal wire of specific resistance `64xx10^(-6) Omega` m and length 1.98 cm has a resistance of `7 Omega`. Find its radius.

A metal wire of circular cross-section has a resistance `R_(1)`. The wire is now stretched without breaking, so that its length is doubled and the den

Description : A metal wire of circular cross-section has a resistance `R_(1)`. The wire is now stretched without breaking, so that its length is doubled and the den

Last Answer : A metal wire of circular cross-section has a resistance `R_(1)`. The wire is now stretched without breaking, so that its ... 2` C. `4 : 1` D. `1 : 4`

Two uniform wires `A` and `B` are of the same total metal and have equal masses. The radius of wire `A` is twice that of wire `B`. The total resistanc

Description : Two uniform wires `A` and `B` are of the same total metal and have equal masses. The radius of wire `A` is twice that of wire `B`. The total resistanc

Last Answer : Two uniform wires `A` and `B` are of the same total metal and have equal masses. The radius of ... `5Omega` when the resistance of wire B is `4Omega`

How t has strings made of metal wire plastic or gut that are stretched across the bottom of the instrument?

Description : How t has strings made of metal wire plastic or gut that are stretched across the bottom of the instrument?

Last Answer : Need answer

(3) made cathode and a pure nickel red, the anode Explanation: Electroplating is the deposition by electrolysis of a coating of metal upon a conducting surface. The simplest system makes the object to be plated the negative electrode (cathode) or plate in a galvanic couple. Thus a spoon or other object may be connected by a wire to a plate of nickel. The process that occurs on the spoon is called reduction and, therefore, the spoon is also referred to as a cathode.

Description : (3) made cathode and a pure nickel red, the anode Explanation: Electroplating is the deposition by electrolysis of a coating of metal upon a conducting surface. The simplest system makes the object to be ... on the spoon is called reduction and, therefore, the spoon is also referred to as a cathode.

Last Answer : Which of the following is not a method of preparing oxygen? (1) Electrolysis of water (2) Fractional distillation of liquid air (3) Decomposition of potassium permanganate (4) Decomposition of manganese dioxide

Electric current in a metal wire is due to the flow of — (1) Electrons (2) Protons (3) Ions (4) Holes

Description : Electric current in a metal wire is due to the flow of — (1) Electrons (2) Protons (3) Ions (4) Holes

Last Answer : (1) Electrons Explanation: A solid conductive metal contains mobile, or free electrons, originating in the conduction electrons. When a metal wire is connected across the two terminals of a DC ... the conductor are forced to drift toward the positive terminal under the influence of this field.

Safety fuse wire used in domestic electrical appliances is made of metal of low (1) Resistance (2) Melting point (3) Specific gravity (4) Conductance

Description : Safety fuse wire used in domestic electrical appliances is made of metal of low (1) Resistance (2) Melting point (3) Specific gravity (4) Conductance

Last Answer : (2) Melting point Explanation: The fuse wire is based on the Joules law of heating which says that when the electric current is allowed to pass through a conductor, the conductor heats up and is ... . For this purpose the material used as fuse wire should have high resistance and low melting point.

Tightly knit metal braid wire can be used with a printed circuit board when ___________. A. conductor flexibility is required B. desoldering components in the circuit C. electrically produced magnetic fluxes would cause inaccuracies in adjacent components D. reactance in the circuit must be kept to a minimum

Description : Tightly knit metal braid wire can be used with a printed circuit board when ___________. A. conductor flexibility is required B. desoldering components in the circuit C. electrically produced magnetic ... cause inaccuracies in adjacent components D. reactance in the circuit must be kept to a minimum

Last Answer : Answer: B

A metal wire of 0.01 m dia and thermal conductivity 200 W/m.K is exposed to a fluid stream with a convective heat transfer coefficient of 100 W/m2 .K. The Biot number is (A) 5.6 (B) 0.025 (C) 3.5 (D) 0.0035

Description : A metal wire of 0.01 m dia and thermal conductivity 200 W/m.K is exposed to a fluid stream with a convective heat transfer coefficient of 100 W/m2 .K. The Biot number is (A) 5.6 (B) 0.025 (C) 3.5 (D) 0.0035

Last Answer : (B) 0.025

Earing is a defect found in steels after the following metal working operation. (A) Extrusion (B) Rolling (C) Deep drawing (D) Wire drawing

Description : Earing is a defect found in steels after the following metal working operation. (A) Extrusion (B) Rolling (C) Deep drawing (D) Wire drawing

Last Answer : (C) Deep drawing

The unit of measurement is per quintal for the following: (A) Collapsible gates with rails (B) Rolling shutters (C) Expanded metal wire netting (D) M.S. reinforcement of R.C.C. works

Description : The unit of measurement is per quintal for the following: (A) Collapsible gates with rails (B) Rolling shutters (C) Expanded metal wire netting (D) M.S. reinforcement of R.C.C. works

Last Answer : (D) M.S. reinforcement of R.C.C. works

What type of PN diode is formed by using a fine metal wire and a section of N-type semiconductor material?

Description : What type of PN diode is formed by using a fine metal wire and a section of N-type semiconductor material?

Last Answer : Point-contact.

A COPPER strip is placed in one compartment of a voltaic cell and a wire connects this strip to a piece of metal in the other compartment through a voltmeter. If the voltmeter reads zero, the other piece of metal is: w) zinc x) mercury y) silver z) copper

Description : A COPPER strip is placed in one compartment of a voltaic cell and a wire connects this strip to a piece of metal in the other compartment through a voltmeter. If the voltmeter reads zero, the other piece of metal is: w) zinc x) mercury y) silver z) copper

Last Answer : ANSWER: Z -- COPPER

Safety fuse wire used in domestic electrical appliances is made of metal of low (1) Resistance (2) Melting point (3) Specific gravity (4) Conductance

Description : Safety fuse wire used in domestic electrical appliances is made of metal of low (1) Resistance (2) Melting point (3) Specific gravity (4) Conductance

Last Answer : Melting point

Electric current in a metal wire is due to the flow of— (1) Electrons (2) Protons (3) Ions (4) Holes

Description : Electric current in a metal wire is due to the flow of— (1) Electrons (2) Protons (3) Ions (4) Holes

Last Answer : Electrons

In a metal wire, which particle carries electric current?

Description : In a metal wire, which particle carries electric current?

Last Answer : In   a  metal  wire  the  particles   responsible  for  carrying  electric  current  are  holes.

What is the difference between a chemical change and a physical change?

Description : What is the difference between a chemical change and a physical change?

Last Answer : Answer: A chemical change is a process that results in the formation of one or more new substances with different chemical properties, while a physical change is a process that changes the physical ... it changes the state of the water from solid to liquid without changing its chemical composition.

What is the difference between a physical change and a chemical change?

Description : What is the difference between a physical change and a chemical change?

Last Answer : A: A physical change involves a change in physical appearance, while a chemical change involves a change in chemical composition.

What is the difference between a chemical and a physical change?

Description : What is the difference between a chemical and a physical change?

Last Answer : A: A chemical change results in the formation of new substances with different chemical properties, while a physical change does not result in the formation of new substances.

Wouldn't an electron exchange in a chemical reaction be considered a physical change?

Description : Wouldn't an electron exchange in a chemical reaction be considered a physical change?

Last Answer : Do your own homework. Seriously.

Is there really a difference between a chemical change and a physical change?

Description : Is there really a difference between a chemical change and a physical change?

Last Answer : Yes? A total difference.

Give me 5 examples of physical change & chemical change?

Description : Give me 5 examples of physical change & chemical change?

Last Answer : If I remember correctly chemical change- bubbles, smell, color, temperature, light emitted, taste… I think there are more. Physical… Seems kind of obvious. Try reading your book instead of asking Fluther to help you with your homework.

Why is the tearing of paper a physical change not a chemical change?

Description : Why is the tearing of paper a physical change not a chemical change?

Last Answer : Found a possible answer =/ http://answers.yahoo.com/question/index?qid=20081017160844AAXQ9jE

12.Few iron filings and a pinch of sulphur powder are taken in a china dish and mixed properly. Justify the change, giving two points as physical/chemical change. -Chemistry

Description : 12.Few iron filings and a pinch of sulphur powder are taken in a china dish and mixed properly. Justify the change, giving two points as physical/chemical change. -Chemistry

Last Answer : It is a physical change as if we will bring the magnet near it all the iron fillings will attract towards it. Hence it shows the properties of it constituents are present so, no new substance is formed. Therefore, it is a physical change .