OsuniPhys1 26P071
An aluminum rod that is 3.04 mm long with a cross-sectional area of 1.28 mm2 is used for a digital thermometer.
(a) what is the resistance (in Ω) at room temperature? (Assume room temperature is 20.0°C)
(b) What is the resistance (in 0) at body temperature? (Assume body temperature is 37.00℃.)
An aluminum rod that is 3.04 mm long with a cross-sectional area of 1.28 mm2 is used for a digital thermometer.
A wire 3.00 m long and 0.450 mm2 in cross-sectional area has a resistance of 40.2 Ω at 20.0°C. If its resistance increases to 40.9 Ω at 27.5°C, what is the temperature coefficient of resistivity? (°C)−1
A copper rod and an aluminum rod of the same length and cross-sectional area are attached end to end (Figure 1). The copper end is placed in a furnace maintained at a constant temperature TCu = 230 ∘C . The aluminum end is placed in an ice bath held at a constant temperature of 0.0∘C. Calculate the temperature at the point where the two rods are joined.
A resistor is constructed of a carbon rod that has a uniform cross-sectional area of 4.90 mm2. when a potential difference of 20.0 V is applied across the ends of the rod, the rod carries a current of 3.60 x 103 A (a) Find the resistance of the rod kS2 (b) Find the rod's length.
A copper rod and an aluminum rod of the same length and cross-sectional area are attached end to end. The copper end is placed in a furnace which is maintained at a constant temperature of 292∘C. The aluminum end is placed in an ice bath held at constant temperature of 0.0∘C. Calculate the temperature (in degrees Celsius) at the point where the two rods are joined. The thermal conductivity of copper is 380 J/(s⋅m⋅C∘) and that of aluminum is 200...
the axial load ?
ldtlcs & Strength Material r is supported by the pin-connected rod CB that has a cross-sectional 1. The rigid ba area of 16 mm2 and is made from 6061-T6 aluminum. Determine the ax the rod CB and elongation rod CB. (E 68.9 GPa, v 0.35) ial stress at 300 N m 1.5 m 0)
ldtlcs & Strength Material r is supported by the pin-connected rod CB that has a cross-sectional 1. The rigid ba area of...
A wire 2.60 m long with a cross-sectional area of 7.07x10-6 m2 is connected to a 30.0 V power supply. If a current of 12.0 A is measured in the wire, a) what is the resistivity of the wire in ohm-meters? Answer in scientific notation. b) If this resistivity had been measured at 20.0 °C, what temperature, in Celsius, would we need to heat/cool the wire to for the resistance to be 4.25 Ω if the temperature coefficient of resistivity...
The truss is constructed from three aluminum alloy members, each
having a cross-sectional area of A = 1350 mm2 and an elastic
modulus of E = 62 GPa. Assume a = 2.8 m, b = 9.0 m, and c = 5.5 m.
If the horizontal displacement of roller B must not exceed 5.0 mm,
calculate the maximum vertical load Pmax that can be supported by
the truss.
Chapter 5, Supplemental Question 008 The truss is constructed from three aluminum alloy...
The bronze bar 3-m long with a cross-sectional area of 350
mm2 is placed between two rigid walls. At a temperature
of -20 oC, there is a gap Δ = 2.2 mm, as shown in the
figure. Use α = 18 x 10-6/ oC and E = 80 GPa.
(A)What is the increase in temperature in oC at which
the compressive stress in the bar will be 30 MPa? (B) What is the
final temperature in oC at which the...
Acceleration EMF (a) A long straight rod with cross sectional area A and conductivity σ accelerates parallel to its length with acceleration a. Write down the Drude-like equation of motion for the average velocity v of an electron of mass m in the rod relative to the motion of the rod itself. Show that, in the absence of an external electric field, there is a steady solution that corresponds to a current 1 Aơma/e flowing in the wire. Assume that...
The A992 steel rod is
subjected to the loading shown. If the cross-sectional area of the
rod is 100 mm2. Neglect the size of the couplings at B and C. The
elastic modulus and yield stress of A992 steel is 200 GPa and 345
MPa respectively. Determine the displacement of B and A with
respect to point D. (Preserve 2 significant digits after the
decimal point.)
QUESTION 1 The 1992 steel rod is subjected to the loading shown. If the...