How many kilos is a kilo? How many grams is a kilo? How many kilos is a ton!

A kilo equals 500 grams, a kilogram equals 1000 grams, and a ton equals 1000 kilograms

When an object is in the air, the reading of the spring scale is 98 n, when all the objects intrude into the water, the reading of the spring scale is 49 n, and when all the objects intrude into the liquid, the reading of the spring scale is 58.8 n, then (g = 9.8 N / kg)
1) How big is the object?
2) What is the density of the object?
3) What is the density of the liquid?

When an object is in air, the reading is 98 n when it is completely immersed in water, the reading is 49 n when it is completely immersed in water, and the reading is 58.8 n when it is completely immersed in liquid
1. What is the buoyancy of the object in the water?
F = 98-49 = 49n
2. What is the volume of the object?
VW = 49 / (9.8 * 1000) = 0.005 M3
3. What is the density of the object?
Object density = 98 / (9.8 * 0.005) = 2000 kg / m3
4. How to calculate the density of liquid?
Buoyancy in liquid = 98-58.8 = 39.2n
Liquid density = 39.2 / (9.8 * 0.005) = 800 kg / m3

As shown in the figure, if a section of iron wire is divided into the same three sections, an equilateral triangle with side length of (1 / 3A & # 178; + 1 / 3B & # 178; + 3) cm can be formed
As shown in the figure, if a section of iron wire is divided into the same three sections, an equilateral triangle with side length of (1 / 3A & # 178; + 1 / 3B & # 178; + 3) cm can be formed. If this section of iron wire is divided into equal events, and the side length is (2 / 3A + B-1) cm square, the length of iron wire can be calculated

The side length of (1 / 2A + B-1) cm is (1 / 2A + B-1) square 3 (1 / 3A & \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\0a = 1 b = 2 wire length 3 (1

As shown in the figure, a spring is hung in the lift, and a small ball is hung under the spring. When the lift is stationary, the spring is extended by 4cm. When the lift is moving, the spring is extended by 2cm. If the mass of the spring is not included, the movement of the lift may be ()
A. Acceleration and descent at 1 m / S2 B. deceleration and descent at 4.9 M / S2 C. acceleration and ascent at 1 m / S2 D. acceleration and descent at 4.9 M / s2

Let the mass of the ball be m and the stiffness coefficient of the spring be K. at rest, Mg = kx1. When the elongation of the spring decreases, the spring force decreases, the resultant force of the ball is vertical downward, and the acceleration of the ball is vertical downward. Then the elevator may accelerate downward or decelerate upward. According to Newton's second law, mg-kx2 = ma, X2 = 12x1 is substituted into the solution, a = 4.9m/s2, and the direction is vertical In this case, the elevator may decelerate to rise at an acceleration of 4.9 M / S2, or it may decelerate to fall at an acceleration of 4.9 M / S2

What do four mixed operations count first if they contain parentheses

In parentheses

A disk-shaped platform with mass m and radius r rotates freely around the vertical axis passing through the center at angular velocity W. a small reptile with mass m falls vertically
The edge of the platform
What is the rotation speed of the platform when the crawler just reaches the edge of the platform?
2 when the distance from the center to the edge of the platform is r, what is the rotational speed of the platform?

Angular momentum is conserved
MR^2/2*w=MR^2/2*w1+mR^2*w1 w1=Mw/(M+2m)
MR^2/2*w=MR^2/2*w1+mr^2*w2 w2=w/(1+2m/M*(r/R)^2)

It is known that the sequence {an} is an equal ratio sequence with the first term A1 = 1 / 4, and its first n terms and S3, S4, S2 in SN form an equal difference sequence
Let BN = the logarithm of an with the base of 1 / 2, find the first n terms and TN of the sequence {1 / BN * BN + 1}

S2 = q / 4, S3 = q ^ 2 / 4, S4 = q ^ 3 / 4. From the meaning of the question, Q ^ 3 / 2 = q / 4 + Q ^ 2 / 4, that is 2q ^ 2-q-1 = 0, q = 1 or q = - 1 / 2.1) q = 1, then an = 1 / 4, BN = 2,1 / [BNB (n + 1)] = 1 / 4, TN = n / 4.2) q = - 1 / 2, then an = (1 / 4) * - 1 / 2) ^ (n-1) = - 1 / 2) ^ (n-1) = - 1 / 2) ^ (n + 1)

A car is driven at a speed of 36km / h for 10s at a constant speed, and then at an acceleration of 1.5m/s for 10s. The displacement of 20 seconds is calculated?

If I remember correctly, you have a problem. The displacement is the straight-line distance between two points. According to your meaning, the topic should add straight-line driving. First of all, the displacement in the first 10 seconds is s = VT = 100m, and the displacement in the next 10 seconds is s = at ^ 2 / 2 + VT = 1.5 * 100 / 2 + 100 = 175m. The total is 275m. Average speed = s / T = 275 / 20 = 13.75m/s

After Xiaoli gave Xiaohong 10 pieces of sugar, she got 2 more than Xiaohong. Xiaoli used to get a few more than Xiaohong
I think it should be $22

1. Suppose Xiao Hong had 0 candy
2. After Xiaoli gave Xiaohong 10 yuan, she had 12 yuan left (according to the condition, "2 yuan more after giving")
3. So Xiaohong had 22 yuan and Xiaoli had 0 yuan
So the answer is 22 more!
I don't believe I'll take the beans and try the above hypothesis

Based on the understanding of protein function, please guess which of the following groups needs more protein
Healthy adult male
obesity
teenagers
aged

Teenagers, teenagers are in the period of growth and development, need to supplement a lot of nutrients

How many kilos is a kilo? How many grams is a kilo? How many kilos is a ton!