Tuesday

December 6, 2016
Number of results: 94,277

**Physics**

A wire with cross sectional area 1.00 cm2 stretches 0.500% of its length when it is stretched with a tension of 20.0 N. What is the Young's modulus of this wire?

*October 28, 2016 by Rick*

**science-college physics**

2. A certain wire of length L, cross-sectional area A is extended by an amount ‘e’ by a force F. Given that the young’s modulus of the material of the wire is E, Show that the; a. Energy stored in the wire is given by the expression (5) b. Energy per unit volume, Ev = x...

*April 19, 2016 by hamunyela morga*

**College Physics**

A wire P has resistance R. If the wire is stretched and its length is increased by 10%, what would be the percentage change in its resistance? (Assume the density of the wire remains constant) A) - 10% B) 0 % C) 10% D) 20% My thoughts: Since resistance is R = resistivity x ...

*November 24, 2011 by Andrew*

**PHYSICS**

Calculate the stress, strain and young's modulus of a wire with a cross-sectional area of 3 x 10^-7 m^2 and a length of 0.6 m that is stretched to a distance of 1.2 x 10^-3 by a 120 N force.

*October 1, 2015 by LL*

**Chemstry**

A 4.1089 g piece of aluminum wire with a circular cross section is 42.06 cm long and has density of 2.6989 g/cm3. What is the volume of the wire and the cross sectional area of the wire in cm2?

*September 17, 2012 by anonymous*

**Physics**

A brass wire with Young's modulus of 9.20 1010 Pa is 2.5 m long and has a cross-sectional area of 4.6 mm2. If a weight of 5.2 kN is hung from the wire, by how much does it stretch?

*April 24, 2010 by Max*

**physics**

A 4.0-m-long steel wire has a cross-sectional area of 0.050cm2. Its proportional limit has a value of 0.0016 times its Young's modulus. Its breaking stress has a value of 0.0065 times its Young's modulus. The wire is fastened at its upper end and hangs vertically. A. How great...

*April 8, 2014 by tally*

**physics**

a wire whose cross-sectional area is 4mm^2 is stretched by 0.1 mm by a certain load.if a similar wire double the area of cross-section is under the same load,then then elongation would be ans: 1)0.05mm

*February 4, 2013 by kala*

**Physics!! Help!!!!!**

A wire of length L and cross-sectional area A has resistance R. What will be the resistance R_stretched of the wire if it is stretched to twice its original length? Assume that the density and resistivity of the material do not change when the wire is stretched. Express your ...

*February 15, 2012 by Melissa*

**Physics**

(1) 45 micro coulombs of charge is passed through a wire in 35 seconds. How many electrons does this represent? What is the current in the wire? (2) A piece of copper wire has a resistance of 5 Ohms at 20 degrees celsius. If another piece of copper wire at 0 degrees celsius is...

*May 4, 2009 by Bob*

**Physics**

A wire of cross-sectional area 5.00x10^-6 m^2 has a resistance of 1.75 ohm. what is the resistance of a wire of the same material and length as the first wire, but with a cross-sectional area of 8.75x10^-6 m^2? I really want to understand what to do here, so detailed steps ...

*February 12, 2013 by Jamie*

**Physics**

The filament in an incandescent light bulb is made from tungsten (resistivity 5.6 x 10-8 Ù·m). The light bulb is plugged into a 120-V outlet and draws a current of 2.36 A. If the radius of the tungsten wire is 0.00464 mm, how long must the wire be? restivity of the wire = 5....

*October 12, 2015 by james check please*

**Physics**

A certain piece of wire has a resistance of 250 ohms. if the wire is cut in three pieces and the cross sectional area of each piece is halved, what is the resistance of each piece?

*March 8, 2011 by Kate*

**physics**

A net charge of 47 mC passes through the cross-sectional area of a wire in 19.0 s. (a) What is the current in the wire? 1 A (b) How many electrons pass the cross-sectional area in 1.0 min? 2 . electrons I got 9.3e+22 for B but its wrong

*May 16, 2012 by Brianna*

**sciencce**

2. A certain wire of length L, cross-sectional area A is extended by an amount ‘e’by a force F. Given that the young’s modulus of the material of the wire is E, Show that the; a. Energy stored in the wire is given by the expression (5) b. Energy per unit volume, Ev = x (...

*April 21, 2016 by salmi*

**physics**

A net charge of 47 mC passes through the cross-sectional area of a wire in 19.0 s. (a) What is the current in the wire? 1 A (b) How many electrons pass the cross-sectional area in 1.0 min? 2 electrons

*May 11, 2012 by Alice*

**physics**

A net charge of 47 mC passes through the cross-sectional area of a wire in 19.0 s. (a) What is the current in the wire? 1 A (b) How many electrons pass the cross-sectional area in 1.0 min? 2 electrons

*May 14, 2012 by Amelia*

**physics A**

A net charge of 47 mC passes through the cross-sectional area of a wire in 19.0 s. (a) What is the current in the wire? 1 A (b) How many electrons pass the cross-sectional area in 1.0 min? 2 . electrons

*May 16, 2012 by confused*

**Physics**

The drawing shows two crates that are connected by a steel (Young's modulus 2.0 x 1011 N/m2) wire that passes over a pulley. The unstretched length of the wire is 1.8 m, and its cross-sectional area is 1.4 x 10-5 m2. The pulley is frictionless and massless. When the crates are...

*October 26, 2013 by Taylor*

**Physics**

A 100 m long wire with a cross-sectional area of 4 mm2 has a resistance of 6 ohms. What is the resistivity of the material of the wire in Ùm?

*November 29, 2012 by Karl*

**mechanics**

The change in length of a steel wire under an applied load can be halved by keeping all other conditions constant but using: A. a different material having a Young's modulus half that of steel B half the cross sectional area of the steel wire C half the length of steel wire D ...

*February 24, 2013 by dmkp*

**Physics**

A 215-kg load is hung on a wire of length of 3.50 m, cross-sectional area 2.000x10^-5 m2, and Young's modulus 8.00x 10^10 N/m2. What is its increase in length?

*April 5, 2014 by Joe*

**Physics**

A copper wire with a length 2.0m, cross sectional area 7.1x10^-6 m^2 and young's modulus 11x10^10 N/m^2 has a 200kg load hung on it. What is its increase the length? (g=9.8 m/s^2) im not sure how to start this problem or what equation to use, can some one help me out with this...

*November 11, 2007 by BrOwN GuRL*

**physics**

A piece of gold wire is used to form a circular loop of radius 12.3 cm. The wire has a cross-sectional area of 11.1 mm^2. Points A and B are 90.0° apart. Find the resistance between points A and B.

*February 8, 2011 by Eric*

**mechanics of materials**

The change in length of a steel wire under an applied load can be halved by keeping all other conditions constant but using:which of the following is correct A. a different material having a Young's modulus half that of steel B half the cross sectional area of the steel wire C...

*February 22, 2013 by dmkp*

**mechanics of materials**

Select the correct answer.The change in length of a steel wire under an applied load can be halved by keeping all other conditions constant but using: A. A different material having a Young's modulus half that of steel B half the cross sectional area of the steel wire C half ...

*February 21, 2013 by dmkp*

**physics **

The filament in an incandescent light bulb is made from tungsten (resistivity 5.6 x 10-8 Ù·m). The light bulb is plugged into a 120-V outlet and draws a current of 2.36 A. If the radius of the tungsten wire is 0.00464 mm, how long must the wire be? restivity of the wire = 5....

*October 10, 2015 by james small help plz *

**Physics**

A total charge of 16ìC passes through a cross-sectional area of a nichrome wire in 4 s. How many electrons pass through the cross-sectional area in 16 s? This has to do with Electric current and so i know that means 16ìC = 16 x 10^-6 = 1.6x10^-5.

*January 19, 2013 by Struggling Student*

**Physics**

the area of cross section of a wire is 1/100000 m^2 length of the wire is increased by 0.1% a tension of 1000N is produced.the young's modulus of the wire will be? ans: 1.10^11 N/m^2

*February 4, 2013 by kalawathi*

**phy**

(Q1)A wire of cross- sectional area of 0.00006m2 and length 50cm stretches by 0.2mm under a load of 3000n.Calculate the Young's modulus for the wire (a)80000000000Nm-2(b)125000000000Nm-2(c)25000000000Nm-2(d)5000000000Nm-2 (Q2)a square plate of side 10cm is made of a metal of ...

*July 3, 2013 by kate*

**physics**

If a metal wire carries a current of 79 . 0 mA, how long does it take for 7.90 × 10 20 electrons to pass a given cross-sectional area anywhere along the wire? The fundamental charge is 1 . 602 × 10 − 19 C. Answer in units of s

*May 21, 2013 by scott*

**Physics Resistance**

A piece of wire of resistance, R and uniform cross sectional area, A is cut into four equal parts and bundled together to form a thicker wire. The resistance of the bundled wire is: A 16R B 1/4R C 4R D 1/16R It's either 16 or 1/16 im not sureee. So I need help for the working ...

*October 5, 2014 by Ariana*

**physics**

If a metal wire carries a current of 130 mA, how long does it take for 3.50×10 20 electrons to pass a given cross-sectional area anywhere along the wire? The magnitude of the charge on an electron is 1.6 × 10 −19 C. Answer in units of s.

*February 22, 2011 by bre*

**Physcis**

A bird lands on a bare copper wire carrying a current of 27 A. The wire is 8 gauge, which means that its cross-sectional area is 0.13 cm2. (a) Find the difference in potential between the bird's feet, assuming they are separated by a distance of 7.2 cm.

*May 21, 2014 by Summer*

**Physics**

A bird lands on a bare copper wire carrying a current of 27 A. The wire is 8 gauge, which means that its cross-sectional area is 0.13 cm2. (a) Find the difference in potential between the bird's feet, assuming they are separated by a distance of 7.2 cm.

*May 21, 2014 by Summer*

**physics**

A potential difference of 2.0 V is applied across a wire of cross sectional area 2.5 mm2. The current which passes through the wire is 3.2 × 10-3 A. What is the resistance of the wire?

*March 6, 2014 by Lucy*

**Math**

Use place value to solve Pablo has a piece of wire that is 0.08 meters long Beth has a piece of wire that is 10 times as long as problems wired leaves wire is one-tenth as long as problems how long is Beth wire how long is li's wire

*September 20, 2016 by Jamirah*

**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. Wire A has twice the resistivity of wire B. Wire...

*February 7, 2014 by Anonymous*

**Physics matter and its properties**

A circular metal column is to support a load of 500 Tonne and it must not compress more than 0.1 mm. The modulus of elasticity is 210 GPa. the column is 2 m long. Calculate the cross sectional area and the diameter. (0.467 m^2 and 0.771 m) Note 1 Tonne is 1000 kg.

*December 27, 2013 by farid*

**Precalculus**

There is a piece of wire 200 cm long. It needs to be cut into 2 pieces, with one piece forming an equilateral triangle and the other piece forming a circle. How long must each piece be to maximize the area of each shape?

*September 4, 2010 by Ce*

**physics ---- really dnt get this at all**

A total charge of 25 mC passes through a cross-sectional area of a nichrome wire in 10 s. How many electrons pass through the cross-sectional area in 16 s? Choose one answer. a. 2.5 x 1017 electrons b. 2.5 x 1019 electrons c. 2.5 x 1016 electrons d. 2.5 x 1021 electrons

*May 31, 2011 by ashley --- HELP PLEASEE!!!*

**physics**

determine the energy stored in a 2m long wire of cross sectional area 0.5mm^2 kf the force of 50N is applied to it.

*December 14, 2015 by jay*

**Math**

Use place value to solve please. Pablo has a piece of wire that is 0.08 meters long. Beth has a piece of wire that is ten times as long as Pablo's wire. Li's wire is 1/10 as long as Pablo's. How long is Beth's wire? How long is Li's wire? Beth has .80 and Li has .07 ??? Is ...

*September 8, 2015 by Anonymous*

**Statics**

A rectangular beam, with cross-sectional width b, height h, Young's modulus Erect, has the same flexural rigidity as a circular beam with the same cross-sectional area. What is the Young's modulus, Ecirc, of the circular beam in terms of Erect,b, and h? What aspect ratio of ...

*October 23, 2014 by qwerty*

**physics**

A 92-kg man's thighbone has a relaxed length of 0.56 m, a cross-sectional area of 6.0 10-4 m2, and a Young's modulus of 1.2 1010 N/m2. By how much does the thighbone compress when the man is standing on both feet? 1 µm

*March 28, 2013 by zena*

**physics **

A total charge of 25 mC passes through a cross-sectional area of a nichrome wire in 10 s. What is the current in the wire? Choose one answer. a. 2.5 A b. 2.5 mA c. 25 mA d. 2.5 µA

*May 31, 2011 by ashley --- HELP PLEASEE!!!*

**physics**

A green sedan weighing 25,000 Newtons is put on a lift supported by a piston with a cross sectional area of 0.1 square meters. What is the minimum force that must be exerted by the air compressor that pushes down on the oil in the reservoir of the lift system in order to lift...

*June 9, 2012 by LL*

**Physics**

A green sedan weighing 25,000 Newtons is put on a lift supported by a piston with a cross sectional area of 0.1 square meters. What is the minimum force that must be exerted by the air compressor that pushes down on the oil in the reservoir of the lift system in order to ...

*June 9, 2012 by LL*

**Physics **

A green sedan weighing 25,000 Newtons is put on a lift supported by a piston with a cross sectional area of 0.1 square meters. What is the minimum force that must be exerted by the air compressor that pushes down on the oil in the reservoir of the lift system in order to ...

*June 9, 2012 by LL*

**Physics**

A green sedan weighing 25,000 Newtons is put on a lift supported by a piston with a cross sectional area of 0.1 square meters. What is the minimum force that must be exerted by the air compressor that pushes down on the oil in the reservoir of the lift system in order to ...

*June 9, 2012 by LL*

**Physics**

A green sedan weighing 25,000 Newtons is put on a lift supported by a piston with a cross sectional area of 0.1 square meters. What is the minimum force that must be exerted by the air compressor that pushes down on the oil in the reservoir of the lift system in order to ...

*June 10, 2012 by LL*

**Calculus**

a piece of wire 12 ft. long is cut into two pieces. one piece is made into a circle and the other piece is made into a square. Let the piece of length x be formed into a circle. allow x to equal 0 or 12, so all the wire is used for the square or for the circle. How long should...

*July 3, 2012 by Tara*

**math**

a piece of wire 24 ft. long is cut into two pieces. one piece is made into a circle and the other piece is made into a square. Let the piece of length x be formed into a circle. allow x to equal 0 or 24, so all the wire is used for the square or for the circle. How long should...

*March 4, 2014 by jason*

**Physics. Please help!**

A green sedan weighing 25,000 Newtons is put on a lift supported by a piston with a cross sectional area of 0.1 square meters. What is the minimum force that must be exerted by the air compressor that pushes down on the oil in the reservoir of the lift system in order to ...

*June 10, 2012 by LL*

**Physics**

A rectangular piece of gold is 3.1 cm long and 3 cm wide. Resistivity of gold is 2.4*10^-8. How deep is the piece when it displays a resistance of R = 1.65 μω for a current that flows along the depth-direction? I used R=(p*l)/A and solved for l. I got the answer ...

*March 8, 2010 by Lily*

**algebra**

A 33-foot-long speaker wire is to be cut into three pieces. One piece is to be 11 feet long. Of the remaining pieces, one must be 2 feet less than 3 times the length of the other. Find the length of the shorter piece

*April 16, 2013 by t*

**Physics**

This problem compares some energy properties of two motor vehicles: For efficient car, use drag coefficient of .21 and a cross sectional area of 1.5m^2. For a light truck, use drag coefficient of .75 and a cross sectional area of 2.7m^2. Use 1.25 kg/m^3 for the density of air...

*November 8, 2011 by Lo*

**Physics**

An aluminum (with Young's modulus 7 x 10^10 Pa) rail is 88.0 m long and has cross-sectional area 0.00050 m^2. The rail is fixed at one end and a 4000 N force is applied at the other end. By how much does the bar stretch?

*November 27, 2016 by Mary*

**Physics**

A copper wire is 7.00 m long and has a cross-sectional area of 1.00 10-4 m2. This wire forms a one turn loop in the shape of a square and is then connected to a battery that applies a potential difference of 0.200 V. If the loop is placed in a uniform magnetic field of ...

*November 11, 2010 by Max*

**physics helpt please?**

A copper wire or length 2.0M, with cross-sectional area 7.1x10^-6 m^2 and youngs modulus of 11x10^10 N/m^2 has a 200 kg load hung on it. what is its increase in length? F/A=Y* change in L/Length = (200*9.8)/7.1x10^-6=11x10^10* delta L/2m? am i even setting this equation up ...

*November 13, 2007 by natali*

**Pre Algebra**

a wire is stretched from the top of a 26-foot pole to a point on the ground that is 15 feet from the bottom of the pole. Approximately how long is the wire in feet? 16 21 30 37

*October 24, 2014 by Maddox*

**Physics**

A wire of length 2.00m and radius 1.0mm is stretched modulus for the wire

*October 15, 2015 by Blessing*

**physics**

A net charge of 73 mC passes through the cross-sectional area of a wire in 9 s. What is the current in the wire? The fundamental charge is 1.602 × 10−19 C.

*April 24, 2015 by chris*

**math**

wire is cut into 2 pieces with one piece 14 feet shorter than other.The wire was 66 feet before cut,how long is the the shortest lenght of wire,shoe steps to solve

*December 5, 2012 by Anonymous*

**MATH**

A wire is stretched from the ground to the top of an antenna tower. The wire is 20 feet long. The height of the tower is 4 feet greater than the distance from the tower's base to the end of the wire.Find the height of the tower. 20^2=H^2 + (H-4)^2 solve for h 400=2H^2 - 8H +16...

*September 27, 2008 by jennifer*

**Physics**

A net charge of 73 mC passes through the cross-sectional area of a wire in 9 s . What is the current in the wire? The fun- damental charge is 1.602 × 10−19 C.

*April 30, 2015 by Chris*

**maths help**

Hi MY question is if a cylinder has a volume of 72cm cubed and a cross-sectional area of 18cm squared. Work out the height of the cylinder Can someone show me how we do it by the steps The volume of a cylinder is given by volume = (cross-sectional area) x height so height = ...

*April 23, 2007 by Ali*

**physics**

A strip of rubber originally 75 mm long is stretched until it is 100 mm long. a.What is the tensile strain b.Why has the answer no units? c.The greatest tensile stress which steel of a particular sort of a particular sort can withstand without breaking is about 10>9 N m>...

*December 27, 2013 by farid*

**math**

An electrician cuts a 12-ft piece of wire into two pieces one piece is 8 feet shorter than the other piece how long was each piece

*February 27, 2015 by cheyanne*

**math**

an electrician cuts a 29 foot piece of wire into two pieces. one piece is 4 feet longer than the other piece.how long is each piece?

*September 26, 2011 by hsanetha*

** math problem**

A piece of wire 24 cm long is cut into two pieces and each piece is bent to form a square . Find the lenght of each piece of wire in order to maximize the sum of the area of the two squares?

*March 21, 2013 by mark*

**mechanical properties of materials**

A steel cable of length 10 m and cross-sectional area 1200 mm2 is loaded with an object of weight 30 kN. Given that the cable is not loaded beyond its proportional limit and Young's modulus of steel is 210 GPa, draw a stress-strain curve for the loaded cable and shade in the ...

*January 28, 2013 by dmkp*

**mechanical properties of materials**

A steel cable of length 10 m and cross-sectional area 1200 mm2 is loaded with an object of weight 30 kN. Given that the cable is not loaded beyond its proportional limit and Young's modulus of steel is 210 GPa, draw a stress-strain curve for the loaded cable and shade in the ...

*January 28, 2013 by dmkp*

**physics**

Find the cross-sectional area of copper wire that is 55.4 m long and has a resistance of 0.943 ohms. The resistivity of copper is 1.79 x 10^-8 ohms m.

*April 28, 2011 by katie*

**Physics**

High-voltage power lines are a familiar sight throughout the country. The aluminum (resistivity = 2.82 x 10-8 m) wire used for some of these lines has a cross-sectional area of 4.4 x 10-4 m2. What is the resistance of 12 kilometers of this wire?

*January 31, 2012 by Morgan*

**physics**

High-voltage power lines are a familiar sight throughout the country. The aluminum wire used for some of these lines has a cross-sectional area of 4.7 10-4 m2. What is the resistance of ten kilometers of this wire?

*February 15, 2012 by Anonymous*

**Physics**

A wire 3.00 m long and .450 mm2 in cross-sectional area has a resistance of 41.0Ω at 20 degrees C. If its resistance increases to 41.4Ω at 29.0 C, what is the temperature coefficient of resistivity?

*February 7, 2011 by Aryan*

**Physics**

A wire 3.00 m long and .450 mm2 in cross-sectional area has a resistance of 41.0Ω at 20 degrees C. If its resistance increases to 41.4Ω at 29.0 C, what is the temperature coefficient of resistivity?

*February 7, 2011 by June*

**Calculus**

A 100 inch piece of wire is cut into two pieces. Each piece of wire is used to make a square wire frame. Let x be the length of one piece of the wire. Determine an algebraic representation A(x) for the total area of the two squares.

*August 21, 2016 by Brenna*

**Related rates**

A piece of wire 10 feet long is cut into two pieces. One piece is bent into the shape of a circle and the other into the shape of the square. How should the wire be cut so that the combined area of the two figures is as small as possible?

*May 20, 2012 by :)*

**physics**

How much charge passes through a cross-sectional area of a copper wire in 0.8 s if I = 3.5 A? 1 C

*May 14, 2012 by Amelia*

**physics**

A graphite rod is 1.0 m long, with a 1.0 cm by 0.5 cm rectangular cross sectional area. What is the electrical resistance between its long ends? What must be the diameter of a circular 2.0 m long copper rod if its resistance is to be the same?

*March 9, 2012 by pakilina*

**math**

A wire is stretched from the ground to the top of an antenna tower. The wire is 20 feet long. The height of the tower is 4 feet greater than the distance from the tower's base to the end of the wire. Find the height of the tower. 20 ft.= w x.4 = height of tower something like ...

*September 25, 2008 by jennifer*

**physics**

a wire 4m long carrying current of 5A place at right angle to B of 6web/m2 the force experience by the wire in SI unit is A LONG SPRING IS STRETCHED BY 2Cm and P.E stored in it is U if the string is stretched by 10 cm then the P.E stored would be

*July 3, 2012 by palwasha*

**engr 109**

Calculate the resistance of a 1 mile length of wire if the conductivity (sigma) is 5.7x10^5 (ohm-cm)^-1 and the diameter of the wire is 1 inch. The formula for resistance is R = length/(sigma*Cross-sectional area) but all of the units must be consistent. The correct answer is ...

*February 18, 2011 by r*

**Cross-Sectional Area**

The cross-sectional area of a beam cut from a log with radius 1 foot is given by the function A(x) = 4x(sqrt{1 - x^2}), where x represents the length of half the base of the beam. Determine the cross-sectional area of the beam if the length of half the base of the beam is 1/3 ...

*February 22, 2008 by John*

**math**

A support wire runs from the top of a tower to the ground. If the tower is 1200 feet tall and the wire is attached to the ground 500 feet away from the tower, how long is the support wire?

*November 20, 2013 by Marissa*

**physics**

How much charge passes through a cross-sectional area of a copper wire in 0.8 s if I = 3.5 A? 1 C -Work equation?

*May 11, 2012 by Alice*

**Physics**

The Golden Gate Bridge in San Francisco has a main span of length 1.28 km, one of the longest in the world. Imagine that a steel wire with this length and a cross-sectional area of 4.00 x 10-6 m^2 is laid on the bridge deck with its ends attached to the towers of the bridge, ...

*June 15, 2015 by Anna*

**physics**

Water flows steadily from an open tank into a pipe. The elevation of the top of the tank is 10.2 m, and the elevation at the pipe is 3.90 m. The initial cross-sectional area of the pipe is 6.40×10^−2 m; and at where the water is discharged from the pipe, it is 2.30×10...

*November 30, 2009 by AE*

**Physics, URGENT!!!**

We consider tobacco virus diffusing along a 0.47 m long tube filled with water. The cross-sectional area of the tube is unknown. The diffusion coefficient is found in Table 10.5, p. 319 in the textbook. A total amount of virus of 2.6 x 10-16 kg is transported in a steady state...

*November 29, 2010 by Sydney*

**Physics/Electricity**

An aluminum wire carrying a current of 9.0 A has a cross-sectional area of 7.0X10^-6 m2. Find the drift speed of the electrons in the wire. The density of aluminum is 2.7 g/cm3. (Assume three electrons are supplied by each atom.)

*October 6, 2013 by George*

**science (physics)**

A copper wire with cross sectional area 0.00030cm^2 is to be used in lifting a 100g object.How fast can the object be accelerated if the wire is to stretch not more than 0.10%? What i know is that first find the elongation & then that will help to find acceleration..

*March 1, 2016 by joan*

**algebra **

A rancher is putting up a rectangular electic fence to contain some horses. The rancher has 1200 feet of electric wire. The fence needs to be at least 120 feet in one direction in order to contain the barn. Which system of linear equalities describes the conditions in this ...

*May 4, 2010 by letes*

**Physics **

In a machine shop, a hydraulic lift is used to raise heavy equipment for repairs. The sys- tem has a small piston with a cross-sectional area of 0.063 m2 and a large piston with a cross-sectional area of 0.172 m2. An engine weighing 2800 N rests on the large piston. What force...

*June 28, 2013 by M&M*

**Precalc 2**

At a state fair truck pull, two pickup trucks are attached to the back end of a monster truck as illustrated in the figure. One of the pickups pulls with a force of 1600 pounds and the other pulls with a force of 3200 pounds with an angle of 45° between them. With how much ...

*November 23, 2014 by Gerald*

**Physics**

Two wires have the same length and the same resistance but are made up of different materials. The resistivities of these materials are 3.97 Ù and 1.97 Ù. Obtain the ratio of the smaller cross-sectional area to the greater cross-sectional area.

*June 13, 2012 by Beth*

**7th grade math pygorean theroem ms.sue correct**

4. A wire is stretched from the top of a 26-foot pole to a point on the ground that is 15 feet from the bottom of the pole. Approximately how long is the wire in feet? (1 point) 16 21 30 37 4.30 is it correct?

*October 9, 2012 by Delilah*

**Physics**

A material is formed into a long rod with a square cross section 0.31 cm on each side. When a 100 V voltage is applied across a 16 m length of the rod, a 4.6 A current is carried. What is the resistivity of the material? This is a rectangular wire rather than a cylindrical. I ...

*March 24, 2016 by David*

**physics**

Two conductors are made of the same material and have the same length. They each have circular cross sectional areas. The ratio of their radii is 2:1. they carry the same current. What is the ratio of the electrical potential across their lengths? i know that you use R=P(L/A) ...

*April 22, 2009 by bobby*