How many kilos is one fifth of a ton

One ton equals 1000 kg
1 / 5 * 1000 = 200 (kg)
One fifth of a ton is 200 kg
So the answer is 200 kg

A piece of iron with a weight of 10N is tied by a light thin wire and immersed in water. When it is still, the gravity of the water discharged by the iron is 6N. What is the buoyancy of the iron and the pull of the thin wire on the iron

6 4

The base of a triangle is 5cm long, and its height h can be expanded and expanded at will. Write out the relationship between the area s and h, and the self variable range of values

s=1/2*5*h
s=2.5*h
h>0

As shown in the figure, two blocks a and B with mass ma and MB are stacked together. If they slide uniformly along the inclined plane fixed on the horizontal ground with angle α, then ()
A. There is no friction between a and B. B. there is friction between a and B, and the friction between a and B does positive work for B. the dynamic friction coefficient between C. B and the inclined plane μ = Tan α D. the friction direction between B and the inclined plane is downward along the inclined plane

A. According to Newton's third law, the static friction force on B is magsin α, parallel to the inclined plane downward, so the friction force of a on B does positive work on B, so a is wrong and B is correct

What is the order of mixing operations

The order of mixed operations is to first calculate the multiplication and division of parentheses, then add and subtract, then calculate the multiplication and division of brackets, then add and subtract, and finally calculate the multiplication and division of braces, then add and subtract,

In a uniform magnetic field B perpendicular to the disk surface, a metal disk with radius r rotates counterclockwise around the O-axis at an angular velocity
As shown in Fig. 12-2-8, the metal disk with radius r rotates in a uniform magnetic field B perpendicular to the disk surface at an angular velocity ω in a counter clockwise direction, then the direction and magnitude of the current passing through the resistance R are (excluding the resistance of the metal disk) () A. from C to D, I = Br2 ω / rb. from D to C, I = Br2 ω / RC. From C to D, I = Br2 ω / (2R) d. from D to C, I = Br2 ω / (2R). The answer is d
1. Closed loop, magnetic flux does not change, how can there be induced current? 2. How to see the direction of current? It's better to draw a diagram,

1. The metal disk can be regarded as the superposition of numerous metal rods with radius length. When each metal rod is rotating, it cuts the magnetic induction line and generates the induced electromotive force. The average cutting speed is v = ω R / 2 & nbsp; & nbsp; & nbsp; (because the cutting speed is zero at the center of the circle) electromotive force E = BRV = br ^ 2 ω / 2 current I = br

It is known that the sequence {an} is an arithmetic sequence. The sum of the first n terms of the sequence {BN} with A3 = 10 and A6 = 22 is Sn and Sn + 1 / 3bn = 1. The general term formula of {an} proves that {BN} is equal ratio
It is known that the sequence {an} is an arithmetic sequence. The sum of the first n terms of the sequence {BN} with A3 = 10 and A6 = 22 is Sn and Sn + 1 / 3bn = 1 (1). Find the general formula of {an} (2). Prove that {BN} is equal ratio (3). Note CN = an × BN and prove C (n + 1) < CN
The point is the third question!

（1） A6-a3 = 3D, d = 4, A1 = 10-8 = 2, an = 4n-2;
（2） Sn + BN / 3 = 1, s (n-1) + B (n-1) / 3 = 1, the former formula minus the latter formula: 4bn / 3-B (n-1) / 3 = 0, BN / b (n-1) = 1 / 4, B1 = 3 / 4, {BN} is an equal ratio sequence with the first term of 3 / 4 and the common ratio q = 1 / 4;
（3） If CN = an × BN = 3 (4n-2) / 4 ^ n, C (n + 1) = 3 (4N + 2) / 4 ^ (n + 1), C (n + 1) / CN = (4N + 2) / 4 (4n-2) = 1 / 4 + 1 / (4n-2), 1 / (4n-2) ≤ 1 / 2, then C (n + 1) / cn ≤ 1 / 4 + 1 / 2 = 3 / 4 < 1, C (n + 1) < CN holds

What is the displacement of a car in the 20s when a car runs at a constant speed of 10m / s for 10s and then at an acceleration of 1.5m/s2 for 10s? What is the average velocity in the whole 20 seconds?

If the displacement X1 = VT1 = 10 × 10m = 100m for uniform linear motion and X2 = vt2 + 12at22 = 10 × 10 + 12 × 1.5 × 100m = 175m for uniform acceleration linear motion, then the displacement x = X1 + x2 = 275m in 20s and the average speed in 20s. V = XT = 27520m / S = 13.75m/s. A: the displacement in 20s is 275m and the average speed in 20s is 13.75m/s

Xiao Li and Xiao Hong read story books. Xiao Li read 180 pages in 3 hours and Xiao Hong read 120 pages in 2 hours. Write the ratio of reading time and the number of pages of Xiao Li and Xiao Hong respectively
, in the composition ratio

Time: 3:2
Pages: 180:120
=（180/60);（120/60）
=3：2

1. What structure will hepatocytes produce uremic molecules and then excrete them with urine?
2. Who is very important to the human body, and will lose a lot of water when urinating, so why does the human body need to eliminate urine in the case of water shortage?
3. The elderly often suffer from hyperopia, try to analyze the causes, and explain the imaging situation and correction methods of hyperopia
4. Which parts of the eye are abnormal and can lead to blindness?

The lens in the eyeball is equivalent to a convex lens. When it is flattened, the focal length becomes smaller, and you can see something close to it. What makes it flattened is the ciliary body

How many kilos is one fifth of a ton