1. I have 250 g of tea at 90°C in a light foam cup. I have...

1. I have 250 g of tea at 90°C in a light foam cup. I have some ice cubes at 0°C, each with a mass of 10 g. How many should I add to my tea to make it drinkable? Explain your assumptions.

2. A thermos will keep hot things hot or cold things cold by preventing the transfer of heat. Explain how a thermos prevents each of the different kinds of heat transfer.

3. I have 5.0 liters of air in a sealed container at a pressure of 120,000 Pa and 20°C. How many air molecules are in my container? (Be careful of units here.)

4. If I warm up the air in my container to 50°C, what will the new volume, pressure, and number of particles be?

5. An isolated system has a momentum of 40 kg m/s, an angular momentum of 12 kg m2/s, and an energy of 150 J at time t=0. What is its angular momentum at time t = 10s?

Expert Solution

genius_generous answered 2 years ago

A light foam cup contains Y*100 g of water at 75.0°C. I add ice with an...

A light foam cup contains Y*100 g of water at 75.0°C. I add ice with an initial temperature of 0.00°C to the water until the temperature is 40.0°C. 16.How much ice did I add? 17.What happened to the entropy of the system of ice and water when I mixed them? Y=24

Before each class, I either drink a cup of coffee, a cup of tea, or a...

Before each class, I either drink a cup of coffee, a cup of tea, or a cup of water. The probability of coffee is 0.7, the probability of tea is 0.2, and the probability of water is 0.1. If I drink coffee, the probability that the lecture ends early is 0.3. If I drink tea, the probability that the lecture ends early is 0.2. If I drink water, the lecture never ends early. 1) What’s the probability that I drink...

1. In a light foam cooler is a 2.4 kg slab of aluminum at 20C. I...

1. In a light foam cooler is a 2.4 kg slab of aluminum at 20C. I add to it 300 g of ice at -10C. What is the equilibrium temperature? How much of the ice melts? 2. If I add 30 g of ice at -15C to 100 g of water at 75C, what is the equilibrium temperature? 3. If 12 g of steam at 100C condenses on a 1500-g iron bar initially at 10C, what will the equilibrium temperature...

1. Consider the following model of the economy: C = 170+.6(Y-T) I = 250 G =...

1. Consider the following model of the economy: C = 170+.6(Y-T) I = 250 G = 300 T = 200a. What is the value of the marginal propensity to consume?b. What is the value of the government budget deficit?c. Calculate the equilibrium level of GDP and show you work on a Keynesian-Cross diagram.d. What is the value of the government-purchases multiplier? Show all your work and explain fully.e. Use your answer to part d to calculate the amount by which...

A 200 g insulated aluminum cup at 16 ∘C is filled with 255 g of water...

A 200 g insulated aluminum cup at 16 ∘C is filled with 255 g of water at 100 ∘C a) Determine the final temperature of the mixture. b) Determine the total change in entropy as a result of the mixing process (use ΔS=∫dQ/T).

Thermodynamics and Statistical Mechanics Problem: You have just microwaved a cup of tea for too long...

Thermodynamics and Statistical Mechanics Problem: You have just microwaved a cup of tea for too long and it is boiling, too hot to drink. You look around and see a punchbowl containing ice floating in water. You thoroughly mix one cup of water (no ice) from the punchbowl with your cup of tea in a thermos bottle. What is the change in entropy of the pint of liquid? Does the sign of the change make sense? Explain.

1. A 100 g ice cube at -10?C is placed in an aluminum cup whose initial...

1. A 100 g ice cube at -10?C is placed in an aluminum cup whose initial temperature is 70?C. The system comes to an equilibrium temperature of 20?C. What is the mass of the cup in kg. 2.Radiation from the head is a major source of heat loss from the human body. Model a head as a 20-cm-diameter, 20-cm-tall cylinder with a flat top.If the body's surface temperature is 36 ?C , what is the net rate of heat loss...

100 g of ice at -20°C are mixed with 250 g of water at 20°C in...

100 g of ice at -20°C are mixed with 250 g of water at 20°C in an insulated calorimeter. What is the final temperature of the system? How many grams of liquid water and how many grams of ice will you find after the system equilibrates? find T in degrees C; m of solid (in grams); m of liquid (in grams) T=____ ms=____ mliq=____

A coffee-cup calorimeter contains 130.0 g of water at 25.3 ∘C . A 124.0-g block of...

A coffee-cup calorimeter contains 130.0 g of water at 25.3 ∘C . A 124.0-g block of copper metal is heated to 100.4 ∘C by putting it in a beaker of boiling water. The specific heat of Cu(s) is 0.385 J/g⋅K . The Cu is added to the calorimeter, and after a time the contents of the cup reach a constant temperature of 30.3 ∘C . Part A Determine the amount of heat, in J , lost by the copper block....

A coffee cup calorimeter contains 152.18 g of water at 20.90 °C. A 55.336 g piece...

A coffee cup calorimeter contains 152.18 g of water at 20.90 °C. A 55.336 g piece of iron is heated to 98.37 °C. The piece of iron is added to the coffee cup caloriemter and the contents reach thermal equilibrium at 23.60 °C. The specific heat capacity of iron is 0.449 J g⋅K and the specific heat capacity of water is 4.184 J g⋅K . How much heat, q , is lost by the piece of iron? How much heat,...

Question