Explore BrainMass


Specific Heat of Ice and Calorimetry

A 40 g block of ice is cooled to -78 degrees C and is then added to 560 g of water in an 80 g copper calorimeter at a temperature of 25 degrees C Determine the final temperature of the system consisting of the ice, water and calorimeter. If all the ice melts, determine how much ice is left. Remeber that the ice must fir

Heat and Temperature: Thermal Expansion

A brass ring of diameter 10.00 cm at 20.0 degrees C is heated and slipped over an aluminum rod of diameter 10.01 cm at 20 degrees C. Assuming the average coefficients of linear expansion are constant, a) to what temperature must the combination be cooled to separate the two metals? Is that temperature attainable? b)

Temperature Dependence of Resistance: Currents

While taking photographs in death valley on a day when the temperature is 58.0 degree Celsius, Bill hiker finds that a certain voltage applied to a copper wire produces a current of 1.000A. Bill then travels to Antarctica and applies the same voltage to the same wire. What current does he register there if the temperature is -88

Thermal physics and Ideal gas law

Question 1: The figure below is a plot of Fahrenheit temperature versus Celsius temperature. (a) Is the value of the y-intercept found by setting (Helpful Hint: The y-intercept is found by setting your x-value to 0. Look at the graph and determine what your x and y-axis represent.) 1. TF = TC 2. TC = 0 or 3. TF = 0? (b) C

Pressure Volume and Temperature of a Compressed Piston

See attached file. A cylinder that has a 40.0 cm radius and is 50.0 cm deep is filled with air at 20.0°C and 1.00 atm (Fig. P19.58a). A 22.0 kg piston is now lowered into the cylinder, compressing the air trapped inside (Fig. P19.58b). Finally, a 75.0 kg man stands on the piston, further compressing the air, which remains at

Thermal Expension: Gasoline volume at different temperature

The density of gasoline is 730 kg/m^3 at 0°C. Its average coefficient of volume expansion is 9.60x10^-4/C°. If 1.00 gallon of gasoline occupies 0.00380 m^3, how many extra kilograms of gasoline would you get if you bought 11.0 gal of gasoline at 0°C rather than at 17.0°C from a pump that is not temperature compensated?


In the real world, what might be a situation where it is preferable for the data to form a relation but not a function? There is a formula that converts temperature in degrees Celsius to temperature in degrees Fahrenheit. You are given the following data points: Fahrenheit Celsius Freezi

Heat Transfer and Change of Phase: Mixing ice and water

A beaker of water sits in the sun until it reaches an equilibrium temperature of 30 degrees C. The beaker is made of 100g of aluminum and contains 180g of water. In an attempt to cool this system, 100g of ice at 0 degrees C is added to the water. A) determine the final temperature. If Tf = 0 degree C, determine how much ice rema

The following table shows the daily high temperature and maximum market price for electricity during 7 days this last summer. Using the data in the table calculate the regression equation, including the slope and intercept terms, R squared, and the SE of

The following table shows the daily high temperature and maximum market price for electricity during 7 days this last summer. Using the data in the table calculate the regression equation, including the slope and intercept terms, R squared, and the SE of the regression (SE of the estimate). Based on your results, how well does

Heat: Change in phase and latent heat capacity

1) 1 kg of ice is taken from a temperature of -34 o C into steam at 161 o C. To the nearest kJ what is the energy used? 2) 2 kg of ice at 0 oC is dropped into 3.99 kg of water at 13 oC. To two decimal places what fraction of the ice melts? 3) 1 kg of ice at -30 oC is dropped into 25 kg of water at 56 oC. To the nearest t

Finding Temperature and Energy Loss

A wall is composed of two materials. Material 1 has a thickness of 4.72 cm and a thermal conductivity of 0.1 while material two has a thickness of 6.06 cm and a conductivity of 1. If the temperature difference inside to outside is 25 Co and the wall has an area of 10 m2, what is the energy loss per second to the nearest watt?

Temperature and Heat of a Steel Container

A steel (α = 12 x 10-6Co) container with a volume of 571 cm3 is filled with oil (β = 0.7x10-3 Co). If the temperature is increased by 30.6 Co how many cubic centimeters overflow to the nearest tenth of a cm3?

Tire pressure and temperature problem

A tire is filled with air at 14.9 degree C to a gauge pressure of 231 kPa. If the tire reaches a temperature of 37.5 degree C, what fraction of the original air must be removed if the original pressure of 231 kPa is to be maintained?

Pendulum frequency problem

The pendulum in a grandfather clock is made of brass and keeps perfect time at 18.1 degree C. How much time is gained or lost in a year if the clock is kept at 24.3 degree C? Assume the frequency dependence on length for a simple pendulum applies. Enter a positive number for a gain, negative for a loss.


To make a secure fit, rivets that are larger than the rivet hole are often used and the rivet is cooled (usually in dry ice) before it is placed in the hole. A steel rivet 1.806 cm in diameter is to be placed in a hole 1.805 cm in diameter. To what temperature (on the Celsius scale) must the rivet be cooled if it is to fit in th

Standing Waves: Vibration of stretched string and organ pipe

A vibrating stretched string has length 38 cm, mass 25 grams and is under a tension of 30 newtons. What is the frequency to the nearest Hz of its 3rd harmonic? If the source of the wave was an open organ pipe of the same length as the wire, what would be the frequency of the 2th harmonic?

Thermal Expansion

Aluminum has a positive coefficient of thermal expansion. Consider a round hole that has been drilled in a large sheet of aluminum. As the temperature increases and the surrounding metal expands, what will the diameter of the hole do?

Coefficient of performance of an air conditioner

An air conditioner maintains a room at 70 degrees F (294.3K) when the outdoors temperature is 90 degrees F (305.4K). If its actual coefficient of performance, K, is half that of an ideal Carnot refrigerator, what is the value of K? (See attached file for full problem description)

Water Temperature Calculations

Water at 50 degrees C can be obtained by mixing together which one or more of the following combinations? Which of the others would have final temperatures higher than 50 degrees C and which lower than 50 degrees C? What will be the final temperatures for these combinations? a. 1 kilogram of ice at 0 degrees C and 1 kilogr

Person's Oxygen Requirements

In one hour the average person at rest consumes 14.5 L of oxygen at a pressure of 1 atm. and a temperature of 20 degree C. A person at rest inhales and exhales 0.5 L of air with each breath. The inhaled air is 21.0 % oxygen, and the exhaled air is 16.3 % oxygen. a) How many breaths per minute will satisfy the person's oxygen

Physics: Problems Based on Refrigeration

Hi, I need some assistance solving the following problems: 1. An ice chest is maintained at 0 degrees Celsius by ice placed in it. The chest is cubical with each inside wall having an area of 1200cm^2 and a thickness of 4cm. Each wall is made of foam plastic with k= 1.3X10^-4 cal/cm/s/C. How much ice will melt in the chest i

Expansion Of Steel Rods During Temperature Change

A steel meter rod reads the correct length of objects at 20 degrees C. If the temperature of the steel rod increases to 30 degrees C and the scale to measure the length of an object, it will a) Give the correct length of the object b) Underestimate the actual length of an object c) Overestimate the actual length of the obje

A temperature

A temperature of -162 degrees C corresponds to a. 111k b. -111k c. -162k d. 162k

Work done on gas, entropy changes, temperature.

1. A 4 L sample of a diatomic gas with specific heat ratio 1.4, confined to a cylinder, is carried through a closed cycle. The gas is initially at 1 atm and 300 K. First, its pressure is tripled under constant volume. Then, it expands adiabatically to its original pressure. Finally, the gas is compressed isobarically to its

Solving for Temperature

Question: Both the pressure and volume of a given sample of an ideal gas double. This means that its temperature in kelvins must. a. Quadruple b. Reduce to one fourth its original value c. Reduce to one half its original value d. Remain unchanged. e. Double

Consider a flat steel plate

Consider a flat steel plate with a hole through its center. when the plates temperature is decreased, the whole will a. expand b. expand if it takes up less than half the plates surface area c. contract only if it takes up more than half the plates surface area d. contract

Matrix inversion; temperature node distribution

Please show all the work. The matrix inversion method has to be shown in detail, the formula used in the class for temperature node distribution was Tm+1,n + Tm-1, n + Tm, n+1 + Tm, n-1 ? 4Tm,n =0 (where ?m? is the X?axis and ?n? is the Y-axis) Please see attachment for problem. Thanks.

Manufacturing Processes

1. Explain why studying the types of chips produced is important in understanding cutting operations. 2. Tool life can be almost infinite at low cutting speeds. Would you recommend that all machining be done at low speeds? Explain. 3. Explain the consequences of allowing temperatures to rise to high levels in cutting? 4. What