A stone tablet, 50 m long, 20 cm wide, 3 m high and 75 t in mass, is of high density____ Kg / m3? RT

Density = 75 * 1000 / (50 * 0.2 * 3) = 2500kg / m3

RELATED INFORMATIONS

1. If a stone tablet is 50cm in length, 20cm in width and 0.7T in weight, what is its density kg / M? If 1 / 4 of it is removed, what is the density of the remaining part kg / M It's urgent,
2. On the physical problems of measuring the density of eggs Using spring dynamometer, beaker, water and thin wire, a scheme of measuring egg density is designed, and the experimental steps and expression of egg density are written Can you make it clear? What is the specific gravity?
3. How to measure the density of eggs with beaker, water, flat bottom test tube, fine sand, scale and salt
4. Measure the density of eggs with salt, water, water cup, line and densitometer What three points should we pay attention to in this experiment
5. How to measure the density of eggs at home Remember it's at home
6. The following equipment is available: a solid metal block, a spring dynamometer, thin wire, a large beaker, and an appropriate amount of water, The density of water is known, 2 letter expression of metal block density=
7. A student uses a spring dynamometer, stone, thin wire, water and beaker to measure the density of liquid. Design the experimental steps and list the expression of liquid to be measured. Stone density > liquid density, stone density > water density
8. The volume of a block of wood is 100 square centimeters, and the density is 0.6 kg / m2. When the block is placed on the water, what is the buoyancy when it is still? (g = 10N / kg) Wrong number... Change square meter to cubic meter I want the exact number!!
9. The weight of root wood is 1600n, the volume is 0.2m3, floating on the water surface, G is 10N / kg, 1 wood density, 2 wood buoyancy, 3 wood drainage volume
10. When a cube floats on the water surface and the volume ratio of the upper part to the lower part is 3:7, the density of the block is______ ．
11. To the south of the park, a 15 meter long, 24 centimeter wide and 3 meter high wall will be built. If 525 bricks are used per cubic meter, how many bricks are used in this wall?
12. Which one is more dense, granite or basalt?
13. Giraffe is the tallest animal on the earth at present, so its blood pressure is also the highest among the animals. The average height of an adult giraffe can reach 4.3m, its mass can reach 2T, and the landing area of one sole of a giraffe is 250cm2? (2) If the blood density of a giraffe is 1.05 × 103kg / m3, when its heart contracts, it is necessary to press the blood to the head 3M higher than the heart, then at least how much pressure should be produced when the giraffe's heart contracts? (systolic pressure refers to the pressure produced when the heart contracts. Atmospheric pressure is not taken into account in calculation. In this problem, G is taken as 10N / kg.)
14. Is a giraffe the tallest animal on land, or an elephant?
15. Is giraffe's heart very good? Why is its blood pressure so high Please give a scientific answer
16. A granite stone with school motto has a mass of 3.18 × 104 & nbsp; kg and a density of 2.65 × 103 & nbsp; The density of brick is known to be 2.05 × 103kg / m3, and the density of cement mortar in the base brick joint is the same as that of brick (G is 10N / kg) (1) The volume of granite stone; (2) the pressure of stone on base; (3) the ratio of stone to base and base to ground
17. How many tons of tire oil can a 3 m long and 1.2 m wide rectangle hold? The density is 0.5
18. A rectangular granite is 10 meters high, 3 meters wide and 2 meters thick, with a density of 2.5 x 10 cubic kilogram per cubic meter. The maximum bearing capacity on the ground is
19. As shown in the figure, PQ is a thin metal sheet in a uniform magnetic field, and its plane is parallel to the direction of the magnetic field. A charged particle shoots out from a certain point at a velocity V perpendicular to PQ, and the kinetic energy is e. the trajectory of the charged particle after shooting is shown in the figure. The ratio of its trajectory radius on both sides of the metal sheet is 10:9. If the resistance and electric quantity of the particle are constant in the process of passing through the plate, it can be seen as follows, Then () A. Charged particles must be positively charged. B. the velocity of charged particles decreases by 1102emc every time they pass through the metal sheet. The kinetic energy of charged particles decreases by 0.19ed every time they pass through the metal sheet. The charged particles are trapped in the metal sheet after they pass through five times
20. As shown in the figure, the uniform electric field in a certain space is vertically downward, the uniform magnetic field is vertically inward, and a metal bar AB falls freely from high h, then () A. A end first landing B. B end first landing C. both ends simultaneously landing D. the above statements are not correct