In an insulating box, there is a 140.0g block of lead whose temperature is 100K and...

In an insulating box, there is a 140.0g block of lead whose temperature is 100K and a 70.0g block of tungsten whose temperature is 300K. (a) What is the equilibrium temperature of the two-block system? (b) What is the change in the internal energy of the system between the initial and the equilibrium state? (c) What is the change in the entropy of the system? (specific heat of tungsten: 0.0321cal/g · K, molar specific heat of tungsten: 24.8J/mol · K, specific heat of lead: 0.0305cal/g ·K, molar specific heat of lead: 26.5J/mol·K

Expert Solution

genius_generous answered 1 year ago

Consider a block-spring system inside a box, as shown in the figure. The block is attached...

Consider a block-spring system inside a box, as shown in the figure. The block is attached to the spring, which is attached to the inside wall of the box. The mass of the block is 0.2 kg. For parts (a) through (f), assume that the box does not move. Suppose you pull the block 10 cm to the right and release it. The angular frequency of the oscillations is 30 rad/s. Neglect friction between the block and the bottom of...

A 20 kg block of iron and a 50 kg block of lead are sealed together...

A 20 kg block of iron and a 50 kg block of lead are sealed together in a tank with 5 kg of air. Initially the iron, lead, and air are at 200°C, 150°C, and 20°C, respectively. The air is initially at 100 kPa. After some time, the final system reaches thermal equilibrium and the air pressure inside the tank is 141 kPa. How much heat transfer occurred between the tank and the surrounding 20°C air? How much total entropy...

A block is at rest on a plank whose angle can be varied. The angle is...

A block is at rest on a plank whose angle can be varied. The angle is gradually increased from 0 deg. At 29.4°, the block starts to slide down the incline, traveling 3.30 m down the incline in 1.50 s. a) Calculate the coefficient of static friction between the block and the plank. b) Calculate the kinetic coefficent of friction between the block and the plank.

1. A block of an alloy of mass 27.0 g and at a temperature of 277.22...

1. A block of an alloy of mass 27.0 g and at a temperature of 277.22 K is placed in a calorimeter containing 41.0 g of water at 357.74 K. If the final temperature of the alloy and water is 303.59 K, calculate the specific heat (in J/g/K) of the metal. The specific heat of water is 4.184 J/g/K. Express your answer to three significant figures in scientific notation. 2.A 0.439 g sample of solid N(CH3)4Cl (s) is dissolved in...

1a) A block of an alloy of mass 33.0 g and at a temperature of 289.36...

1a) A block of an alloy of mass 33.0 g and at a temperature of 289.36 K is placed in a calorimeter containing 36.0 g of ethylene glycol at 348.15 K. If the final temperature of the alloy and ethylene glycol is 306.28 K, calculate the specific heat (in J/g/K) of the metal. The specific heat of ethylene glycol is 2.39 J/g/K. Express your answer to three significant figures in scientific notation. b) A 0.0763 g sample of solid RbBr...

What is the minimum surface area of a box whose top and bottom is a square...

What is the minimum surface area of a box whose top and bottom is a square if the volume is 40 cubic inches. (Surface area is the area of all the sides of the box).

A block with a mass m = 2.12 kg is pushed into an ideal spring whose...

A block with a mass m = 2.12 kg is pushed into an ideal spring whose spring constant is k = 3580 N/m. The spring is compressed x = 0.073 m and released. After losing contact with the spring, the block slides a distance of d = 1.71 m across the floor before coming to rest. A.) Write an expression for the coefficient of kinetic friction between the block and the floor using the symbols given in the problem statement...

A block is at rest on an inclined plane whose elevation can be varied. The coefficient...

A block is at rest on an inclined plane whose elevation can be varied. The coefficient of static friction is μs= 0.45, and the coefficient of kinetic friction is μk = 0.18. The angle of elevation θ is increased slowly from the horizontal. At what value of θ does the block begin to slide (in degrees)? What is the acceleration of the block?

2. A spring whose coefficient is k is compressed by length d and a block of...

2. A spring whose coefficient is k is compressed by length d and a block of mass m is placed right next to the end of the spring. When the spring is released, the block acquires a velocity and keeps on moving along a horizontal smooth surface until it reaches an inclined plane whose angle is θ and whose coefficient of friction with the block is μ. It travels up the inclined plane for a while before reaching maximum height....

A 80.0 cm3 box contains helium at a pressure of 2.00 atm and a temperature of...

A 80.0 cm3 box contains helium at a pressure of 2.00 atm and a temperature of 80.0 ∘C. It is placed in thermal contact with a 220 cm3 box containing argon at a pressure of 4.50 atm and a temperature of 420 ∘C. A)What is the initial thermal energy of each gas? B)What is the final thermal energy of each gas? C)How much heat energy is transferred, and in which direction? D)What is the final temperature? E)What is the final...

Question