Question

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Find the minimum diameter of an l = 19.4 m long copper wire that will stretch no more than 9.98 mm when a mass of 300 kg is hung on the lower end. (Hint: The Young's modulus of copper is 110.0 GPa.)

Answer #1

What hanging mass will stretch a 2.4-m-long, 0.49 mm - diameter
steel wire by 1.5 mm ? The Young's modulus of steel is
20×10^10N/m^2
Express your answer in kilograms.

A wire of diameter 1.0 mm and length 3.5 m stretches 3.5 mm when
8.0 kg is hung from it.
a) What is the Young's modulus for the wire?
b) What is the effective spring constant for the stretching
wire?

A metal wire 1.0 m long and of 2.0 mm diameter is stretched by a
load of 40.0 kg. the extension produced on the wire is 1.5mm.
What is the stress?
What is the strain?
Young's modulus of elasticity?
The energy stored in the Wire.
The Force constant

PLEASE SHOW ALL WORK!
00-gauge copper wire has a diameter of 9.266 mm and a
resistivity of 1.68 × 10−8 Ω · m at 20.0◦C. The wire is 1.00m in
length.
a) What is the power loss in the wire if the wire carries 110.
A?
b) The temperature coefficient of resistivity for copper is α =
3.90 × 10−3 ◦C−1. If the copper is at 40.0◦C, what is its new
resistivity?
c) If it still has the same power...

A 17.0 m -long copper wire, 3.00 mm in diameter including
insulation, is tightly wrapped in a single layer with adjacent
coils touching, to form a solenoid of diameter 2.80 cm (outer
edge).
What is the length of the solenoid?
What is the field at the center when the current in the wire is
17.0 A ? show work

A 2 m long gauge 14 copper wire (diameter 1.624 mm, resistivity
1.72 × 10-8 Ωm) replaces a similar 2 m long copper wire but of
gauge 20 (diameter 0.812 mm). The resistance of the new wire is
then that of the original wire.

A 2.05-m-long cylindrical steel wire with a cross-sectional
diameter of 4.00 mm is placed over a light, frictionless pulley. An
object of mass m1 = 5.80 kg is hung from one end of the wire and an
object of mass m2 = 3.10 kg from the other end as shown in the
figure below. The objects are released and allowed to move freely.
Compared with its length before the objects were attached, by how
much has the wire stretched while...

#4. A copper wire is 250 m long and it has a diameter of 0.225 mm.
The resistivity of copper is 1.7 x 10-8 -m. A battery of
negligible internal resistance and emf of 35.0 v is connected
across this wire.
a) Find the resistance of the wire.
b) Find the current through the wire.

A 3.00-m length of copper wire at 20 ∘C has a 1.20-m-long
section with diameter 1.2 mm and a 1.80-m-long section with
diameter 0.60 mm . There is a current of 2.3 mA in the 1.2 mm
-diameter section.
(a) What is the current in the 0.60 mm -diameter section?
(b) What is the magnitude of E⃗ in the 1.2 mm -diameter
section?
(c) What is the magnitude of E⃗ in the 0.60 mm -diameter
section?
(d) What is the potential difference...

Consider a straight piece of copper wire of length 2 m and
diameter 8.5 mm that carries a current I = 9 A. There is a magnetic
field of magnitude B directed perpendicular to the wire, and the
magnetic force on the wire is just strong enough to “levitate” the
wire (i.e., the magnetic force on the wire is equal to its weight).
Find B. Hint: The density of copper is 9000 kg/m3 .

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