The density of an ordinary egg? The density of an ordinary egg? The specific number is urgent, thank you

First, put water in the beaker, put in the eggs, measure the density. Then take out the eggs, add salt, and then put in the eggs, measure the density. M (+ salt) - M (ordinary) = egg density, The density of brine can be measured by densitometer. In addition, densitometer can only measure the density of liquid

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1. The density of wood block is 0.6 * 103 kg / m3, and the volume is 2 decimeters. When it floats on the water, calculate the buoyancy of the wood block (g = 10N / kg)
2. A piece of wood with a mass of 1kg and a density of 0.6 × 103kg / m3 floats on the water surface. How much buoyancy does the object bear? What is the volume of the immersed part?
3. (1) A brick with a thickness of 5cm and a density of 2.5 × 103kg / m3 is placed on the horizontal ground. As shown in figure (a), what is its pressure on the ground? (2) Using this kind of brick to build a wall, the gap between the upper and lower layers of brick and between the brick and the horizontal wall base is filled with cement slurry with thickness of 1cm and density of 2.0 × 103kg / m3, as shown in figure (b). If the maximum pressure that the wall base can bear is & nbsp; 4.35 × 105Pa, how high can the wall be built at most? (g = 10 N / kg)
4. The bottom area of the cylindrical container is 200 cm 2. The container contains 20 cm deep water. After putting the wood block with a density of 0.4 × 103 kg / m3 into the water for rest, the container is filled with water, The pressure on the bottom of the barrel increased by 490 PA Ask: what is the mass and volume of the block
5. A, B and C are 300 meters apart in turn (as shown in the figure). A, B and C walk 100 meters, 90 meters and 85 meters per minute in turn. If a, B and C start at the same time, they will pass by______ For the first time, the distance between a and B, C is equal
6. A, B and C are 300 meters apart in turn (as shown in the figure). A, B and C walk 100 meters, 90 meters and 85 meters per minute in turn. If a, B and C start at the same time, they will pass by______ For the first time, the distance between a and B, C is equal
7. Zhang Cong accidentally knocked over the ink bottle, Be quick. We'll be chasing the score I can't write on this side Here's the supplement In one assignment, you can only see the following words: "a, the distance between the two places is 400km, the speed of motorcycle is 45km / h, and the speed of car is 35km / h? Please complete this question and solve the equation side by side The title is "Zhang Cong accidentally knocked over the ink bottle, so that only the following words can be seen in an assignment:" a, already 400km away, the speed of motorcycle is 45km / h, the speed of car is 35km / h? "? Please complete this question and solve the equation
8. In the winter games, all the events of class 5 (1) were lost, and the students of other classes laughed at them-_ -Write a allegorical saying
9. In order to prepare 1.1x10 cubic kg / m3 brine, 1 liter brine has been prepared, and its weight is 1200g (1) Does this salt meet the requirements? (2) if not, should we add water or salt? How many kilos?
10. Can you measure 100g of alcohol without balance and only with measuring cylinder? Known Please
11. Measuring the density of eggs Use the following equipment: a beaker, salt, thin wall test tube with flat and thick bottom, ruler, water, thin wooden stick Measure the density of egg and write the expression of density with the measured physical quantity
12. What is the density of eggs
13. How to measure the density of eggs A cup, enough water and salt, a glass rod, a dropper, a densitometer, design an experiment to measure the density of an egg
14. Please use spring dynamometer, beaker, water and thin wire to design a scheme for measuring the density of eggs Find the experimental steps and density expression
15. How to measure the density of eggs at home? If you really can't think of it, you can do one of the following: 1: How to wash clothes with the least water and clean? 2: Explore what color has strong heat absorption ability? Thank you!
16. Measure the density of eggs with a densimeter, beaker, water and salt
17. Measuring egg density Please use the spring dynamometer beaker water thin line to design a program to measure the density of eggs. Write the experimental steps Note: apply the knowledge of mass density instead of force Please use spring dynamometer beaker and water thin line measuring cylinder to design a scheme for measuring egg density. Write out the experimental steps Note: apply the knowledge of mass density instead of force
18. A granite stone with school motto has a mass of 31.8t and a density of 2.65 times 10 cubic kilogram per cubic meter
19. The mass of a piece of granite is 6.5 tons, and its volume is the cubic of 2.3 meters
20. If a stone tablet is 50cm in length, 20cm in width and 0.75T in mass, its density is () kg / M cubic?