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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?


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

Radiation Specific 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

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

Dew point, Air temperature and Precipitation

In areas of precipitation, the dew point and air temperature are higher than in the surrounding areas not receiving rain. In areas of precipitation the dew point and air temperature are also the same or close to being the same. What can you say about the relationship between air temperature and the air's dew point for stations

{11.12}Steam at 100 degree C is added to ice at 0 degree C. The mass of the steam is 10.0kg and the mass of the ice is 50.0g. What is the final temperature of the mixture?The exhaust temperature of a Carnot heat engine is 350 degree C. What is the intake temperature if the efficiency is 25.0 percent?

Steam at 100 degree C is added to ice at 0 degree C. The mass of the steam is 10.0kg and the mass of the ice is 50.0g. What is the final temperature of the mixture? ================================================= Answers: a) 20.4 degree C b) 40.4 degree C c) 80.8 degree C d) 90.1 degree C ###########################

Newton's Law of Cooling : Application to Falling Body Temperature

In a murder investigation, the crime scene investigators arrive 5am to examine the body. They found the body temperature to be 30 degrees celcius in a constant room temperature of 20 degrees celcius. (Normal body temperature is taken to be 37 degrees celcius). At 5.30 am the coroner arrived and measured the body temperature to

What kind of relationship exists between emitted light and time

Certain crystals fluoresce when exposed to a short burst of ultraviolet light. The amount of light emitted by the crystals is both time and temperature dependent. The emitted light is maximum at the time of excitation, the output then decaying with time. Such materials can be used to measure temperature. Given are some relative

Surface tension of water and mercury: Effect of temperature

At 20 degrees celsius the surface tensions for water and mercury are 73dyn/cm and 470dyn/cm respectively. Find these values in SI units. A small capillary tube of 1mm diameter is placed into a container of 20 degree celsius water. will the level of the water in the tube move above or below the level of water? by what distance in

brass rod pendulum loses time; find the error in one day.

See attached file. A clock driven by a brass rod pendulum loses time when the rod expands as the temperature rises. Find the error in one day. A pendulum clock is driven by a brass rod of length Lo= 1.6 meters, pivoted at one end. The pendulum beats perfect time when the temperature is to= 21 degrees Celsius. If the