A ‘thermacole’ icebox is a cheap and an efficient method for storing small quantities of cooked food in summer in particular. A cubical icebox of side 30 cm has a thickness of 5.0 cm. If 4.0 kg of ice is put in the box, estimate the amount of ice remaining after 6 h. The outside temperature is 45 °C, and co-efficient of thermal conductivity of thermacole is 0.01 J s-1 m-1 K-1. [Heat of fusion of water = 335 × 103 J kg-1]

Q: A 1.50-kg iron horseshoe initially at 600°C is dropped into a bucket containing 20.0 kg of water at…

A: From heat transfer equation,

Q: The height of the Washington Monument is measured to be 170 m on a day when the temperature is 35oC.…

A: The change in temperature is, ∆T=Tf-Ti∆T=-10.0°C-35.0°C∆T=-45.0°C

Q: 2) A hot bar of lead with Ti Pb, Mpb = .6 kg, is dropped into an iron pot (mFe = .3 kg) that has…

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Q: A 500 g aluminum bucket contains 1.20 kg of water at an equilibrium temperature of 40.0 °C. The…

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Q: A steel is 40 cm long at 20°C. The coefficient of linear expansion for steel is 1.2 × 105 (C°)1.…

A:

Q: A fire walker runs across a bed of hot coals without sustaining burns. In this problem, you may…

A: Temperature of the man , Tc = 37 °C Thickness of callus , dc = 2.9 mm = 2.9 x 10-3 m kc = kw = 0.08…

Q: A copper rod has a length of 1.9 m and a cross- sectional area of 3.4 x 10-4 m². One end of the rod…

A:

Q: If a leaf is to maintain a temperature of 40.0°C , it must lose 253 W/m2 by transpiration…

A:

Q: A 500 g aluminum bucket contains 1.20 kg of water at an equilibrium temperature of 40.0 °C. The…

A:

Q: Steel expands 1 part in 100,000 for each 1 degree C increase in temperature. If the 1.5 km main span…

A:

Q: A 20.0 kg rectangular block of material has a surface area of 2.20 m² fand thickness of 30.0 cm. The…

A: The new volume of an object that has expanded due to a temperature rise is given by V = Vo1+β∆T,…

Q: A cube of edge length 5.7 x 10-6 m, emissivity 0.74, and temperature -110°C floats in an environment…

A: Given: l=5.7*10-6 me = 0.74T = -110°C = 163 KTenv=-160=113 K

Q: A spherical steel ball bearing has a diameter of 2.540 cm at 23.00°C. (Assume the coefficient of…

A: Givendiameter of steel ball do=2.540 cminitial temperature of ball=To=23.0°CCoefficient of linear…

Q: The height of the Washington Monument is measured to be 170 m on a day when the temperature is…

A:

Q: A closed box is filled with dry ice at a temperature of -77.6 °C, while the outside temperature is…

A:

Q: An engineer has an unknown metal rod. To determine the coefficient of thermal expansion of the…

A: The graph is plotted with L0∆T against ∆Length. From the graph, we find that (x1, y1)=(0.05, 3) and…

Q: A steel bridge, considered as a 1D object, is 800 m long at room temperature (25 ̊C). If the coldest…

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Q: The inner and outer surface temperature of a 1 sq. ft. wall of a kiln are 1800 °F and 200 °F…

A:

Q: An 800-W iron is left on the iron board with its base exposed to the air at 20°C. The convection…

A:

Q: A copper rod has a length of 1.5 m and a cross-sectional area of 4.6 x 104 m2. One end of the rod is…

A:

Q: A 25-g glass tumbler contains 200 mL of water at 24°C. 1) If two 15-g ice cubes, each at a…

A: Given, mass of the tumbler container, m= 25 g mass of the water, mw = 200 ml temperature of the…

Q: A glass coffee pot has a circular bottom with a 9.00-cm diameter in contact with a heating element…

A:

Q: A soldering iron has a cylindrical tip of 2.5 mm in diameter and 20 mm in length. With age and…

A: It is given that,

Q: Q2/ A rod (1.260 m) long expands by (1mm) when heated from (8 °C to 70 "C). What is the coefficient…

A:

Q: 3. The following data is related to a short brass cylinder of diameter D 10 cm and height H = 20 cm…

A: First of all we are having the properties of Brass at room temprature: k=110 W/m0C, density=8530…

Q: An aluminum cylinder 10 cm long , with a cross-sectional area of 12 cm² , is to be used as a spacer…

A: Given Data: Material→ Aluminum Cylinder original length, lo=10 cm =0.1 m Cross-sectional area, A=12…

Q: 1.900 × 106 J of heat is added to a cylinder of aluminum (radius 5.000 cm, length 10.00 cm) at room…

A:

Q: 2. (a) A wire that is 1.50m long 20°C is found to increase its length by 1.9cm when warmed to 420⁰…

A: Given: The initial length of the wire is 1.5 m. The initial temperature is 20oC. The increment in…

Q: (III) A copper rod and an aluminum rod of the same length and cross-sectional area are attached end…

A:

Q: While swimming, conduction can play a big role in heat loss from the body. The body of one swimmer…

A: Given data: Thickness thickness (b) = 1.6 mm Thermal conductivity of the skin (k)=0.37 W/m.K Water…

Q: A hollow aluminum cylinder 20 cm deep has an internal capacity of 2 L at 20°C. It is completely…

A:

Q: A pair of eyeglass frames are made of an epoxy plastic (coefficient of linear expansion = 1.30 ✕…

A: Coefficient of linear friction, α=1.30×10-4 °C-1 Room temperature, Ti=20°C ∆L=0.0202 mL0=0.0201 m…

Q: If a leaf is to maintain a temperature of 40.0°C (reasonable for a leaf), it must lose 257 W/m2 by…

A: CONCEPT: We know,  the amount of heat taken by the substance is given by…

Q: One face of an aluminium cube of edge 2 meters is maintained at 100ºC and the other end is…

A: Given : Thermal Conductivity (K) = 209 W/m ºC Area of cube = (2 x 2) m2 = 4 m2 Time(t) = 5 seconds…

Q: An 8-m-internal-diameter spherical tank made of1.5-cm-thick stainless steel (k = 15 W/m·K) is used…

A: The inner and outer surface area of the tank is,

Q: A 2.0-kg aluminum block is originally at 10 degrees celcius. If 36 kJ of energy are added to the…

A: Given, Heat energy, Q=36  kJ=36000 J Initial temperature, Ti=10°C=283.15 K  Specific heat capacity,…

Q: A spherical steel ball bearing has a diameter of 2.540 cm at 26.00°C. (Assume the coefficient of…

A: Diameter, d = 2.540cm Initial temperature,Ti =26c Alpha, coefficient of linear expansion = 1.1*105C…

Q: an aluminum cylinder 10 cm long , with a cross-sectional area of 20 cm² , is to be used as a spacer…

A: Solution: given that length L = 10 cm area A=20 cm2 T1 = 25 degree C T2 = 77 degree C young modulus…

Q: If a leaf is to maintain a temperature of 40.0°C (reasonable for a leaf), it must lose 250 W/m2 by…

A: Given data: The energy lost by the leaf is E=250 W/m2. The area of the leaf is A=0.003 m2. The heat…

Q: Compute the amount of heat transferred in two hours through a solid brick wall 7m x 3m x 230 mm,…

A:

Q: 6. Go The block in the drawing has dimensions L, × 2L, × 3L, where L, = 0.30 m. The block has a…

A: The heat flow rate is given by  H =K A (T'- T)d

Q: The initial temperature of 150 g of ice is -20°C. The spe- cific heat capacity of ice is 0.5…

A: Given:-  The mass of ice is m = 150 g  The initial temperature of the ice is Ti= -20oC. The specific…