The area of the top bottom of a cone-shaped object is 2 / 3 of the area of the bottom. As shown in the figure, if you put it on the table (the big side is below), the pressure on the table is 200 PA Turn it over. What's the pressure on the table,

The area of the top bottom of a cone-shaped object is 2 / 3 of the area of the bottom. As shown in the figure, if you put it on the table (the big side is below), the pressure on the table is 200 PA Turn it over. What's the pressure on the table,

Suppose the area of the bottom is s and the area of the top is 2S / 3
The pressure on the table is y = K / X
K is the pressure of the object on the table, and X is the area of the contact surface between the object and the table
The equation 200 = K / S is established according to the meaning of the question
The solution is k = 200s
After turning over, y = K / (2S / 3) = 200s * 3 / 2S = 300

There is a cone-shaped container filled with water, which is respectively placed on the table as shown in the figure, then the relationship between the pressure of water on the bottom of the container and the pressure is (d)
A. F a = f b p a > P B
B. F a = f b p a < P B
C. F a > F B, p a > P B
D. F a > F B P A = P B
Explain why

I know what you're talking about. The water surface is the same height, but the nail is thicker, right
Explanation: P = pGH is water, P must be, G must be, h is the same, so p a = P B
F = PS, s big, f big (same as P)

The area of the top and bottom of a cone is equal to that of the bottom, and the pressure on the surface is 200 PA
Well, first of all, I declare that I'm only in the second grade of junior high school, and I'm the representative of the class's mathematics class. This is pressure. The teacher said that we should learn physics. But the teacher told us today that pressure is a statement, and I solved it, which is equal to 800. What I want to say is that on the second floor, don't be smart, don't think that you are a detective Conan, and don't listen in class, I'm a good student, but you guessed it right. I like music very much. I like singing, playing guitar and playing piano. Xiao is more generous and gives points to the first floor

The contact area between the table legs and the ground is 15mc & sup2;, and the pressure of the table top on the ground is calculated