Physics Heat & Thermodynamics Level: High School
A 50.0 g lump of metal at temperature 151 degrees C is placed in a calorimeter cup containing 30.0 grams of water at 23 degrees C. After equilibrium is established, the temperature is 49 degrees C. The heat capacity of the cup is 42 J/K. What is the specific heat cm of the metal?
Physics Electrostatics Level: High School
A point charge of 3.5 nC is located at the origin and a second charge of -5.00 nC is located on the x axis at x = 1.5 m. Calculate the electric flux through a sphere centered at the origin with radius 1.0 m. Repeat the calculation for a sphere of radius 2.0 meters.
Financial Management Misc Topic Level: High School
analysis of financial statements
1.Calculate: Comprehensive income
2 Core operating income after tax
3. Net financial expense after tax
4. Return on net operating assets
5. Core return on net operating assets
6. Net borrowing cost
7. Free cash flow
Show calculations for all above
Question Diagram
Physics Heat & Thermodynamics Level: High School
A weight lifter manages to snatch a 104 kg weight a distance of 1.5 m . How many kcal of heat energy are equivalent to this lift ?
Physics Heat & Thermodynamics Level: High School
How much energy (in J) is removed from the human body by the evaporation of 9.9 g of water ?
(Hint : The latent heat of vaporization is 540 kcal/kg for water. Please use only the heat of vaporization, and not the energy required to raise the temperature to 100 degree C .
Physics Heat & Thermodynamics Level: High School
Change of state
Heat is added to 0.7 kg of ice at -8 degree C . How many kilocalories are required to change ice to steam at 136 degree C .
Physics Heat & Thermodynamics Level: High School
Radiation
If an object has a surface area of 0.7 m2 and an emissivity of 0.61 , how much power (in W) does it radiate at a temperature of 34 degree C ?
Physics Properties Of Matter Level: High School
Gases
A tank having a volume of 0.11 m3 contains helium gas at 170 atm . How many balloons can the tank completely fill if each filled balloon is a sphere 34 cm in diameter at an absolute pressure of 1.2 atm ?
Physics Properties Of Matter Level: High School
Gas lows
A gas cylinder of volume 36 liters contains an ideal gas at temperature 27 degrees C and pressure 1720 kPa . Some of the gas leaks , until the pressure falls to 1325 kPa . How many moles of gas leaked , assuming that the temperature remains constant during this process ?
Physics Properties Of Matter Level: High School
Gas lows
A constant volume gas thermometer has a pressure of 7160 Pa at 22 degree C . What would the pressure be for -61 degree C (in Pa) ?
Physics Heat & Thermodynamics Level: High School
Thermal expansion
A can of gasoline has a rectangular base with dimensions of 13 cm by 10 cm . If there is 0.5 liters of gasoline in the can . how much does the surface of the gasoline rise (in mm) in the can when the temperature is raised by 34 degree C ? The coefficient for volume expansion of gasoline is 9.5 10-4/ degrees C .
Physics Properties Of Matter Level: High School
Kinetic theory of gases
At what temperature (K) does the average KE of a molecule in an ideal gas equal 3.9 10-21 J ?
Physics Heat & Thermodynamics Level: High School
Thermal expansion
How much (in m ) does a concrete slab on the Mackinac Bridge 240 m long contract when going from 23 to -19 degrees 0C ? The linear expansion coefficient a is 10-5 per degree 0C ?
Physics Properties Of Matter Level: High School
Gases
2.9 liters of Nitrogen at -2 degree C and 2.3 atmospheres contain how many moles ?
Physics Rotational Mechanics Level: High School
Suppose the motor has a bearing shaft diameter of 3.2 cm and the coefficient of friction of each bearing is 0.008 . Find the torque of friction of the bearings .1) 0.0320 N-m
2) 0.314 N-m
3) 0.411 N-m
4) 0.481 N-m
