Physics Heat & Thermodynamics Level: High School
Calorimetry
An insulated beaker with negligible mass contains liquid water with a mass of 0.220 kg and a temperature of 85.7 degrees C . How much ice at a temperature of -20.3 degrees C must be dropped into the water so that the final temperature of the system will be 23.7 degrees C ?Calculate the heat lost by the water when cooled to Tf . Determine an expression for the heat gained by the ice in terms of the mass of ice . Since there is no heat added to or removed from the system , the total heat change of the system must be zero . Set up the approximate equation and solve for the mass of ice .
Take the specific heat of liquid water to be 4190 J/kg.K , the specific heat of ice to be 2100 J/kg.K , and the heat of fusion for water to be 334 kJ/kg .
Physics Waves And Oscillations Level: High School
A fisherman notices notice that his boat is moving up and down periodically, owing to wave on the surface of the water . It takes a time of 2.10 s for the boat to travel from its highest point to its lowest , a total distance of 0.600 m . The fisherman sees that the wave crests are spaced a horizontal distance of 6.24 m apart. a) How fast are the wave traveling ? b) What is the amplitude A of each wave ? c) What is the angular frequency of the wave ? d) What is the angular wave number of the wave ? e) What is the displacement of the wave at X = 4.00 x 10^-2 m , and t = 4.70 s ?
Physics Rotational Mechanics Level: High School
A prep cook spins a salad spinner 24.0 times in 8.00 seconds (at a constant rate ) and then stops . The salad spinner rotates 8.00 more times before it comes to rest . Assume that the spinner slows down with constant angular acceleration . What is the angular acceleration of the salad spinner as it comes to rest ?
Physics Heat & Thermodynamics Level: High School
1) Find the linear equation that expresses temperature in degrees Fahrenheit as a function of temperature in degrees Celsius .
2) Find the linear equation that expresses temperature in degrees Celsius as a function of temperature in degrees Fahrenheit .
3) How do the graphs of these two functions differ ?
Physics Heat & Thermodynamics Level: High School
There is a formula that converts temperature in degrees Celsius to temperature in degrees Fahrenheit . You are given the following data points .Fahrenheit ---- Celsius
Freezing point of water 32---- 0
Boiling point of water 212 ---100
Physics Heat & Thermodynamics Level: High School
Conduction
a) Find the rate of energy flow through a copper block of cross sectional area 15 cm squared , and length 8.0 cm when a temperature difference of 30 degrees C is established across the block . Repeat the calculation , assuming that the material is b) a block of stagnant air with the given dimensions , c) a block of wood with the given dimensions .
Physics Heat & Thermodynamics Level: High School
Calorimetry
What mass of steam that is initially at 120 degrees C , is needed ot warm 350 g of water and its 300 g aluminum container from 20 degrees C to 50 degrees C ?
Physics Heat & Thermodynamics Level: High School
Calorimetry
A 100 g of cube of ice at 0 degrees C , is dropped into 1.0 kg of water that was originally at 80 degrees C . What is the final temperature of the water after the ice has melted ?
Physics Heat & Thermodynamics Level: High School
Radiation
A blackbody at 0 degree C has a surface are of 35 cm squared . Determine the rate at which energy is emitted by the object .
Physics Properties Of Matter Level: High School
Gases
Suppose that the molecules of a gas actually have five degrees of freedom rather than three . Determine the average molecular kinetic energy of such a gas at 300 degrees C .
Physics Properties Of Matter Level: High School
Gases
What temperature would nitrogen gas molecules possess an rms speed of 25.0 m/s ?
Physics Heat & Thermodynamics Level: High School
A ideal gas undergoes a process which increases its temperature from 20 degree C to 89 degreeC while increasing its gauge pressure from 0.00 atm to 4.78 atm . If the volume of the gas at the end of the process is 317 cm cubed , find the initial volume .
Physics Heat & Thermodynamics Level: High School
Suppose that the heat energy is being supplied to a section of an ice covered road by the sun at the rate of 25.0 kW . How much ice at 0 degree C can be melted in one hour ?
Physics Heat & Thermodynamics Level: High School
Calorimetry
55.0 g of H2O at 10 degrees C are mixed with 75.0 g of H2O in a 137 g copper cup (c = .093 cal/gC) at 20 degrees C . Determine the final temperature of the system at equilibrium
Physics Properties Of Matter Level: High School
Elasticity
A 365 lb crate 1.26 ft high with a squared base 1.00 ft on each side is subjected to a shear force of 25.5 lb . Find the sher stress on the crate .