Prokofiev VL - solution of the entire version 10 on the
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Task 1.10
The body rotates uniformly with the initial angular velocity 5 s-1 and angular acceleration 1 s-2. How many turns will the body make in 10 seconds?
Task 1.20
What is the speed of the moving body, so that its longitudinal dimensions are reduced by 75%.
Task 1.30
A steel ball weighing 50 g fell from a height of 1 m to a large plate, giving it a force pulse equal to 0.27 N · s. Determine the amount of heat generated by the impact and the height to which the ball rises.
Task 1.40
The number of times the mass of a moving deuteron is greater than the mass of a moving electron, if their velocities are respectively 0.6 sec and 0.9 sec. What are their kinetic energies.
Task 1.50
At a temperature of 27 ° C and a pressure of 106 Pa, the density of the mixture of oxygen and nitrogen is 12 g / dm3. Determine the molar mass for the mixture.
Task 1.60
The diffusion coefficient of hydrogen under normal conditions is 9.1 • 10-5 m2 / s. Determine the coefficient of thermal conductivity of hydrogen.
Task 1.70
In the isothermal expansion of one mole of hydrogen, heat of 4 kJ was expended, while the volume of hydrogen increased fivefold. At what temperature does the process take place? What is the change in the internal energy of the gas, what kind of work does the gas do?
Task 1.80
Ice with a mass of 1 kg, which is at a temperature of 0 ° C, is heated to a temperature of 57 ° C. Determine the change in entropy.
The body rotates uniformly with the initial angular velocity 5 s-1 and angular acceleration 1 s-2. How many turns will the body make in 10 seconds?
Task 1.20
What is the speed of the moving body, so that its longitudinal dimensions are reduced by 75%.
Task 1.30
A steel ball weighing 50 g fell from a height of 1 m to a large plate, giving it a force pulse equal to 0.27 N · s. Determine the amount of heat generated by the impact and the height to which the ball rises.
Task 1.40
The number of times the mass of a moving deuteron is greater than the mass of a moving electron, if their velocities are respectively 0.6 sec and 0.9 sec. What are their kinetic energies.
Task 1.50
At a temperature of 27 ° C and a pressure of 106 Pa, the density of the mixture of oxygen and nitrogen is 12 g / dm3. Determine the molar mass for the mixture.
Task 1.60
The diffusion coefficient of hydrogen under normal conditions is 9.1 • 10-5 m2 / s. Determine the coefficient of thermal conductivity of hydrogen.
Task 1.70
In the isothermal expansion of one mole of hydrogen, heat of 4 kJ was expended, while the volume of hydrogen increased fivefold. At what temperature does the process take place? What is the change in the internal energy of the gas, what kind of work does the gas do?
Task 1.80
Ice with a mass of 1 kg, which is at a temperature of 0 ° C, is heated to a temperature of 57 ° C. Determine the change in entropy.