-
Anonymous users2024-02-113.Surface area (3*4+4*6+3*6)*2=108cm2 volume 3*4*6=72cm3
4.Height 240 48 = 5 5 * 6 * 2 + 6 * 8 + 5 * 8 * 2 = 188mm2 In the fourth question, the box has no lid, so one side (length times width) cannot be counted as surface area. Those with an answer of 236 made this mistake, and those with an answer of 136 do not know what went wrong.
-
Anonymous users2024-02-10Question 1: m=300-300*6%=282 (g) Question 2: 270*(1-80%)=54
Question 3: s=2*(3*4+4*6+3*6)=108v=3*4*6=72
Question 4: The base area is 6*8=48, then the height is 240 48=5, so the surface area is 2*(6*8+5*6+5*8)-6*8=188 Question 5: (y*90%-1530) y=15%.
-
Anonymous users2024-02-09Let's give it to the first one, the fastest
-
Anonymous users2024-02-083.Surface area = (3 * 4 + 3 * 6 + 4 * 6) * 2 = 108 volume = 3 * 4 * 6 = 72
4.Height = 240 6 8 = 5 Surface area = 6 * 8 + 6 * 5 * 2 + 8 * 5 * 2 = 188
5.(90%y-1530) 1530=15% List price y=1955
-
Anonymous users2024-02-071. Xiaohua is 140 cm tall and Cortana is 160 cm tall. How many percent is Cortana more than Floret? To solve this problem, we have two ideas:
a. You can first find out that Cortana is higher than the floret (20) cm, and then find the percentage of (20) cm (140 cm). The list is ( 20 140 ) and the result is ( ).
b. You can also regard the height of the floret as 100%, find out that the height of the floret is equivalent to the height of the floret ( ) and then find out how many percent of the height of the floret is higher than the floret. Listed as ( ) The result of the calculation is (. Is the percentage of Flore shorter than Cortana ( ) equal to the percentage obtained earlier?
Not equal), think about why. The reference object is different.
-
Anonymous users2024-02-06a, 20, 20, 140, (160-140) 140, b, 114, [(160 140)*100%-100%], not equal.
Reason: The reference is different.
-
Anonymous users2024-02-05Focal length f=60-50=10cm
At this time, the object distance (the distance from the candle to the convex lens) U=50-20=30cm, 30 is greater than 10x2, that is, the object distance is greater than 2 focal lengths, U>2F, and the image is inverted, (reduced) real image.
camera).
-
Anonymous users2024-02-04Travel 100m to the north
The size is equal and the direction is the same.
1 0 in any direction.
-
Anonymous users2024-02-031.and other large virtual images.
Plane mirror Chong Xinwu vertical frank.
3.The dispersion or direction of light propagation.
Presents a clear image.
Parallel lines that cross E to do AF, cross the extension line of MN at H, and connect the HF angle EHA = angle HAF = angle ACB >>>More
3-valent iron ions are hydrolyzed into iron hydroxide and hydrogen ions, and heating will enhance the degree of hydrolysis. Hydrogen ions and chloride ions combine to form HCl, which is heated and volatilized. Iron hydroxide will lose water and become iron oxide when heated. >>>More
The key to choosing the first 3 options in this question is not to be fooled by the condition that "the magnitude of its acceleration is magnitude." Because it only requires the change of energy, and what electric potential energy, overcoming the electric field force to do work, etc., you just need to know that the uniform electric field is a conservative field, and the change of potential energy is only related to the beginning and end positions, so as long as it moves the s distance, the change in electric potential energy is qes. >>>More
It's better to think of multiple solutions.
The two cars drove opposite each other from A and B at the same time and met five hours later. The speed of one car is 55 kilometers per hour, and the speed of another car is 45 kilometers per hour. >>>More
There are 10 electrons outside the nucleus of ion B+ and B is known to be Na >>>More