Science questions master to junior high school speed 50 points good in plus

Volume = base area * height.

*Radius 2*High ==

Mass = Density * Volume.

149150kg=

The volume of each Kowloon pillar is about 19 cubic metres.

The mass of each Nine Dragon Pillar is about tons.

If the distance from the people of Cong Biyan to one mountain is Hui Xun x, then to the other is 1000-x2*x 340-2*(1000-x) 340|=2x=670 or 330

So the distance to the two mountains is 670 and 330

1 1500 m sec * sec = 2100 m The speed at which the sound is transmitted by seawater. 2

It's very simple, the number in the first row increases by 1, then x=-3, and substituting the second row gets 2x+1=-5; Substituting the third row gives x +2 = 11

You just need to understand the meaning of the question, which says that if the first row of numbers is x, then the second row is 2x+1, and the third row is x +2;Do you try to substitute each corresponding number?

From the question, it can be seen that the buoyancy of water on it is 20n-17n=3n, according to the formula f float = g row (the gravity of the drained water) = m (the mass of the drained water) g (liquid v drain g the volume of the metal is the volume of the drained water (because it is completely invasive) now f float is known: 3n

liquid known: 1 10 m (density of water).

g is known: so v row = f float g = 3n 1 10 m multiply in fact, junior high school physics is not difficult is to set the formula over and set the past, I believe you will learn well!!

The buoyancy experienced is 3n

The gravity of the volume of drained water is 3n

f = density * v row * g (

Density p=1000kg m3v=

v = f water = f mercury = 79000n (because mercury is denser than iron and floats on it).

The provable triangle BME congruent FMC yields BE=CF, and the provable triangle Ben is similar to DFN, bn:dn=be:DF=1 3AB:(CF CD)=1 3AB:(1 3AB 3AB)=1:4

1.Lead, iron, aluminum, 2Let copper and gold be x, and y has x+y=200;200 (x Solve it yourself.)

3.To find the density, you need to know the volume and mass, and the quality is known as long as there is volume!

Find the total volume according to the mass of the water, and then find the volume of water after putting the metal block according to the mass of the remaining water, then the volume of the metal block is known! It's about that, I don't know if you ask! I won't forget it.

The increase of aluminum, iron and lead decreased sequentially.