The calculation method of volume is the same as that of volume lady, but the length, width and height should be measured from ()

The calculation method of volume is the same as that of volume lady, but the length, width and height should be measured from ()

The calculation method of volume is the same as that of volume lady, but the length, width and height should be measured

Find a cone-shaped object, find a way to calculate its volume, and say the measurement and calculation method

First measure the diameter or radius of the bottom surface (or the circumference of the bottom surface), and then measure the height; use the calculation formula of cone volume: 1 / 3 × bottom area × height to calculate

Four mixed operations of decimals
Four mixed operations for decimals! There are at least two different symbols in an expression
More prawns, everyone!

1.1/3*(5*(2/3)) 2.(1+37%)*20 3.35/2*75% 4.30*(50/2) 5.(54+10%)/20 6.(25/3*18)*30% 7.(2+70%)*40 8.1/7*(98*(1/4)*2) 9.25%*((23+2%)*4) 10.(30+20%)/2 11.12*3/(25+20%) 12.30/(3+40%) 13.27/8*16*10% 14.(2/3)...

A disk with radius r can rotate around a horizontal axis passing through the center of the disk and perpendicular to the disk surface. The moment of inertia of the disk is I. there is a non extensible light rope on the disk, and there is no relative sliding between the rope and the disk. When an object with mass m is tied at the end of the rope, the object will descend at a constant speed. If an object with mass m is tied at the end of the rope, the matter will descend at an accelerated speed, The air resistance is not taken into account
\X05: (1) friction moment between disc and shaft;
\X05 (2) acceleration of an object of mass M

(1) Taking the disk as the research object, the friction torque is set as MF,
Moment of rope tension to o point: M1 = Mgr,
When the object descends at a constant speed, the disc rotates at a constant speed and the resultant torque is zero
M1－Mf＝0,
Mf＝mgR.
（2）
The acceleration of the object with mass m is a and the tension of the rope is t
Object based research:
Mg－T＝Ma ①
In this paper, we take the disc as an example
Angular acceleration A1 = A / R
TR－Mf=I a1=I a/R ②
① (2) a = (M-M) GR ^ 2 / (I + Mr ^ 2)

It is known that Sn in the arithmetic sequence an is its first n term and the general term formula of an sequence is obtained by assuming A6 = 2 and S10 = 10

S10=(a1+a10)*10/2=10
a1+a10=2
If the difference is equal, A5 + A6 = a1 + A10 = 2
a6=2
So A5 = 0
Then d = a6-a5 = 2
a1=a5-4d=-8
So an = - 8 + 2 (n-1)
That is, an = 2n-10

The car runs at a constant speed of 36km / h, and now accelerates at a square acceleration of 0.6/s. What is the speed after 10s?

36km/h = 10m/s
Acceleration = 0.6m/s ^ 2
10s acceleration 0.6m/s ^ 2 * 10s = 6m / S
Real time speed: 10M / S + 6m / S = 16m / S = 57.6km/h

Xiaohong's writing speed is 20% faster than Xiaoli's（

Xiao Hong writes 120% faster than Xiao Li

Aquatic plants, animals, and other small organisms live in the aquarium in the biological laboratory. Can such an aquarium become an ecosystem? Why?

No, the ecosystem includes non biological material and energy, as well as producers, decomposers and consumers. You've lost a lot of things, so you can't

A's speed is 1b's speed is 4A at - 3B at 12, moving to the negative direction of the number axis at the same time. After a few seconds, the origin is in the middle of two points

Let the far point be in the middle of two points after x seconds, then the distance from a to the far point is equal to the distance from B to the origin, and ab moves towards the negative axis at the same time. A is at - 3, so if we add 3, B is the total distance at 12, then the relation is
1 * x + 3 = 12-4 * x solve the equation to get x = 1.8, that is, after 1.8 seconds, the far point is between a and B

A coat is 90 yuan, which is 32 times the price of trousers. How much is a suit?

90 △ 32 + 90, = 60 + 90, = 150 (yuan), answer: 150 yuan for a suit