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Molecular Physics | Thermodynamics
Jose has a cup of hot coffee, at 45°C. He adds some warm milk, and the resulting mixture is now 40°C. Does the mixture have more, less or the same amount of heat? Why?
Molecular Physics | Thermodynamics
AN EFFORT FORCE OF 200.0 N IS APPLIED TO AN IDEAL MACHINE TO MOVE A 750.0-N RESISTANCE A DISTANCE OF 300.0 CM
A. THROUGH WHAT DISTANCE MUST THE EFFORT FORCE ACT
B.WHAT IS THE IMA OF THE MACHINE)
A. THROUGH WHAT DISTANCE MUST THE EFFORT FORCE ACT
B.WHAT IS THE IMA OF THE MACHINE)
Molecular Physics | Thermodynamics
The fundamental frequency on a aluminum string that is fixed at both ends is 468 Hz. The string is then cooled 174°C and as such its length changes. Determine how much the fundamental frequency will change as a result assuming the tension remains constant.
Δf1 =
Δf1 =
Molecular Physics | Thermodynamics
A temperature difference of 5 K is equal to
Molecular Physics | Thermodynamics
What mass of ice at -14 Celsius will be needed to cool 200cm cube of an orange drink from 25 Celsius to 10 Celsius.( Specific fusion of ice= 3.36×10^5.specific heat capacity of ice= 2100. Specific heat capacity of water= 4200Jkg^-1
Molecular Physics | Thermodynamics
A piece of copper of mass 300g at a temperature of 950 Celsius is quickly transferred to a vessel of negligible thermal capacity containing 250g of water at 25 Celsius . If final steady temperature of the mixture is 100 ceslsius.calculate the mass of the water that boil away . (Specific heat capacity of copper=4.2×10^2. specific heat capacity of water=4.2×10^3. latent heat of vaporization of steam=2.26×10^6)
Molecular Physics | Thermodynamics
A ball is floating at rest in a fluid.
The ratio of the volume of the fluid displaced, VD, to the volume of the ball, Vball, is:
VD/Vball = 0.79
If the ball has a density of 950 kg m−3 then what is the density of the fluid? (to 2 s.f and in kg m−3)
The ratio of the volume of the fluid displaced, VD, to the volume of the ball, Vball, is:
VD/Vball = 0.79
If the ball has a density of 950 kg m−3 then what is the density of the fluid? (to 2 s.f and in kg m−3)
Molecular Physics | Thermodynamics
A fixed mass of gas of volume 600 cm3 at a temperature of 27° c is cooled at constant pressure to a temperature of 0° c. What is the change in volume
Molecular Physics | Thermodynamics
Consider a one dimensional monatomic lattice with lattice constant 4.91A and atoms of mass 28amu. The speed of sound in the lattice is 11.6kms-1 . A) calculate the maximum frequency of waves that can be transmitted by the lattice.B) calculate the interatomic force constant of the lattice
Molecular Physics | Thermodynamics
How many joules of heat must be absorbed to cool 5.00 kg of water from 75.0 degrees * C to 10.0^ C?
