The mass of an elephant is 5000kg, and the area of each foot is 600cm2. Please estimate the pressure on the ground when the elephant stands on four feet? In the form of knowing, seeking, solving and answering

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• 1. An elephant weighs 600 kg. The contact area between the foot and the ground is 600 square centimeters. How much pressure does the elephant exert on the ground when it stands on the ground with four feet? How much pressure does the elephant put on the ground when raising its feet
• 2. The weight of an elephant is 5000kg, and the area of each foot is about 600cm square. How much pressure does the elephant put on the ground when standing on four feet? (process)
• 3. The third power PA of pressure 6 * 10 at 50cm depth of a liquid is used to calculate the liquid density (G is 10N / kg)
• 4. Yao Ming is 229cm in height and 140kg in weight. The average density of his wax figure is 0.9 times 10 times 3 kg / m3. The density of human body is about equal to that of water Please, what's the quality of Yao Ming's wax figure?
• 5. The quality as like as two peas of basketball star Yao Ming is 140kg, and the density of human body is roughly the same as that of water. In Shanghai, the Tussauds Wax Museum has a solid wax figure identical to that made from paraffin wax. At least how much kg paraffin wax is needed? (known paraffin density of =0.9 * 10 3 times kg/ cubic meters).
• 6. The density of human body is similar to that of water. The mass of a middle school student is about 50kg, and its volume is______ M3, the gravity is______  N．
• 7. The density of human body is similar to that of water, and the mass of a normal adult is about 10______ Kg, its volume is about______ M 3
• 8. Find the maximum and minimum values of the function f (x) = 1 / 3 x to the third power - 21x square + 1 in the interval [- 1,4]
• 9. Given x + X - 1 = m, find the value of x 2 + X - 2
• 10. When a = - 1, M is a positive integer, the 2m + 1 power of (- a)=___
• 11. The weight of an elephant is 6 times 10 to the fourth power, and the area of each foot is 600 per square centimeter?
• 12. An elephant with a mass of 6 × 10 cubic, the area of each foot is 600 square centimeter. What is the pressure on the ground when it lands on four feet
• 13. The weight of an elephant is 6 tons, and the area of each foot is 600 CM & sup2;, so when the elephant stands, what is the pressure and pressure on the ground
• 14. The density of a certain brick is 2 × 10 cubic kilogram per cubic meter, the pressure it can bear is 5 × 10 quintic Pascal, and the length, width and height of the brick are 3 × 10 cubic kilogram per cubic meter The density of a brick is 2 × 10 cubic kilogram per cubic meter, the pressure it can bear is 5 × 10 quintic Pascal, and the length, width and height are 24, 12 and 6cm respectively What is the maximum height that can be built by using this brick to repair a cylindrical chimney? (g = 10 N / kg) Why H = P / ρ G
• 15. The density of a brick is 2 × 10 cubic kilogram per cubic meter, the pressure it can bear is 5 × 10 quintic Pascal, and the length, width and height are 24, 12 and 6cm respectively Ask: 1. Put a brick flat on the ground, how much pressure does the ground receive? 2. What is the maximum height that can be built by using this brick to repair a cylindrical chimney? (g = 10 N / kg)
• 16. The height of an iron cylinder is 10cm. What is its pressure on the horizontal ground? (the density of iron = 7.9 * 10 cubic kg / m, g * 10N / kg)
• 17. The rated power of the engine is 120km. The mass is 1.5 times 10 to the fourth power kg. The contact area between each track and the ground is 1.25m square. (g = 10N / kg)
• 18. If the mass of the bulldozer is 1.8 times 10 to the fourth power kg, and the track landing area is 2.4m square, the pressure of the bulldozer on the horizontal ground is 0
• 19. As shown in the figure, the amphibious infantry combat vehicle has a mass of 22T and a total track landing area of 4m2. (g = 10N / kg, ρ water = 1.0 × 103kg / m3) (1) what is the pressure of the vehicle on the horizontal ground? (regardless of the mass of the person on the tank) (2) the tank has the function of hitting the target and transporting on the water. In a water drill, the volume of water discharged by the tank is 23 m3. What is the buoyancy of the tank? (3) In this water exercise, the pressure of water on the chariot is 1.5 × 104pa. What is the depth of this place?
• 20. An elephant weighs 6000 kg, with an area of 600 square centimeters per foot. The pressure of his four feet on the ground? G = 10 N / kg