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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

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

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

Stoichiometric Combustion and Typical Jet Turbine Combustion

Determine, using the chemical balance equations, the stoichiometric fuel:air ratio for the complete combustion of C12H26 in air of 21% Oxygen, 78% nitrogen. Using this value of AFR, determine the combustion temperature rise for a typical gas turbine (T2 = 250C). Note the two charts provide different ranges on the vertical and


At what temperature is the Fahrenheit value equal to the temperature in Kelvins?

Temperature of an Expanded Gas

If 2.0 liters of a gas origninally at 2.0 atm and 300 K is expanded to 5.0 liters at 1.0 atm what is its new temperature?

Solving for Pressure

Question: An automobile tire is pumped up to an absolute pressure of 33 lb/in^2, with air at a temperature of 40.0 degrees Fahrenheit. After driving for several hours, the temperature in the tire reaches 120 degrees Fahrenheit. Find the pressure in the tire at that point in SI units.

Volume of a balloon

A large, aluminumized-Mylar balloon contains 1.000 m^3 of helium when filled outdoors at 0 degrees C on a winter's day. What will its volume be at home at 20 dgrees C?

Calculating volume

A chamber sealed with a moveable piston contains 5.50 litres of hydrogen at 28 degrees C and 81.3 kPa. What would its new volume be at STP?


A 1.00-m^3 tank is filled with nitrogen gas to a gauge pressure of 20.0 atm. It is then connected through a valve to 9.00-m^3 evacuated chamber. The valve is opened just a little, and the gas slowly flows unitl it finally stops on its own. Given that the temperature was constant throughout the transfer, what is the pressure i

Absolute Pressure

A bubble rises from the bottom of a tank of water that is at a uniform temperature. Just before it bursts at the surface the bubble is three times its original volume. Determine the absolute pressure at the bottom of the tank.

Radiation Heating

Assuming that the specific heat of the body is 1 cal g^-1 degrees C^-1, a) Plot the approximate temperature rise as a function of whole body dose ranging from 100 mGy to 10 Gy b) What absorbed dose would correspond to a potentially lethal heat body burden, assuming that a body temperature rise of 5 degrees C (normal body


Does the sensitivity of an altimeter to errors in the boiling point temperature increase or decrease with altitude? make the approximation that the latent heat of vaporization and the scale height do not depend on the boiling point temperature.

Water, Monatomic Gas Problem - Calculate Gas Pressure after Prolonged Contact

A beaker with a metal bottom is filled with 20 g of water at 20 degrees Celsius. It is brought into good thermal contact with a 4000 cm3 container holding 0.40 mol of a monatomic gas at 10 atm pressure. Both containers are well insulated from their surroundings. Question: What is the gas pressure after a long time has elapsed?

Compression of a Jaguar XK8 Cylinder

A Jaguar XK8 convertible has an eight-cyliner engine. At the beginning of its compression stroke, one of the cylinders contains 499 cm^3 of air at atmospheric pressure (1.01x10^5 Pa) and a temperature of 27.0 degrees Celsius. At the end of the stroke, the air has been compressed to a volume of 46.2 cm^3 and the gauge pressure ha

Pressure Cooker

(A) A pressure cooker is a pot whose lid can be tightly sealed to prevent gas from entering or escaping. If an otherwise empty pressure cooker is filled with air of room temperature and then placed on a hot stove, what would be the magnitude of the net force F_120 on the lid when the air inside the cooker had been heated to 120

Calculating moles using volume, density, molar mass, pressure and temperature

See attached file for clarity. Acid rain is a growing worldwide environmental problem. Naturally, rainwater should have a pH of not less than 5.5, but in the northeastern United States for example, the average pH of the rainwater is about 4.5. The increased acidity of the rain kills plants and animals in lakes and streams, ca