Guys, does anyone understand physics, the school curriculum, please help me solve the problems, I really need to ...

Guys, does anyone understand physics, the school curriculum, please help me solve the problems, I really need to ...

2. The turbine impeller has a diameter of 6.6 m and makes 88.3 rpm. Determine the period of rotation of the pulley mounted on the shaft, and the linear speed on its rim if the radius of the pulley is 0.145 m.

3. How many revolutions around the Earth will an artificial satellite make in a day, if the radius of its orbit is 7300 km? Acceleration of gravity at satellite altitude should be considered equal to 7.5 m / sИ2

4. The flow rate of water in a horizontal pipe increases from 20 cm / s to 1 m / s. How much will the water pressure change.

5. Determine the kinetic energy of the translational motion of one ammonia molecule at 100 ° C, as well as the total kinetic energy of the molecules contained in one mole of ammonia at the same temperature.

6. At what temperature is the osmotic pressure in the cells of cotton leaves 22.3 * 10И5 Pa, if the concentration of cell juice is 935 mol / mИ3? There is no dissociation of molecules.

7. How much water will turn into steam if 10 kg of molten lead is poured into a brass vessel containing 1 liter of water at 10 ° C at the melting temperature? The mass of the vessel is 0.5 kg.

8. As a result of the circular process, the gas performed work equal to 3 kJ and transferred 16.8 kJ of heat to the refrigerator. Identify the cf of this process.

3. The satellite is held in the Earth’s orbit due to compensation of the Earth’s gravitational force by inertia from the current centripetal acceleration. Then the speed in sq. / radius) = St. acceleration pad. ,

whence we find the angular velocity of rotation of the satellite in the Earth’s orbit as omega = speed / radius = 0.01 (rad / s). One full revolution corresponds to 2 * Pi radians. In days 86,400 seconds. Then the number of revolutions = omega * 86400/2 * Pi = 13.75.

4. Pressure is inversely proportional to the fluid flow rate. Thus, the pressure will decrease by 5 times