Some questions about buoyancy in junior high school physics 1. A 100 cubic centimeter object is hung under the spring dynamometer. When the object is immersed in water, the indication of the spring dynamometer is 1.7n__ N 2. Put a solid aluminum block with a mass of 27g into a beaker filled with water. When the aluminum block is still in water, the mass of water discharged from the beaker is__ g. Put the aluminum block into a beaker filled with alcohol, and the mass of the discharged alcohol is__ g

Some questions about buoyancy in junior high school physics 1. A 100 cubic centimeter object is hung under the spring dynamometer. When the object is immersed in water, the indication of the spring dynamometer is 1.7n__ N 2. Put a solid aluminum block with a mass of 27g into a beaker filled with water. When the aluminum block is still in water, the mass of water discharged from the beaker is__ g. Put the aluminum block into a beaker filled with alcohol, and the mass of the discharged alcohol is__ g

1.2.7n, buoyancy 1n, spring tension 1.7n
10 8, because the volume of aluminum is 10 cubic centimeters

Is the unit m in F = ma g or kg

kg

How can the unit of Ma. H be converted to w?

For example, 9v800 haoan 1 hour:
9V * 0.8A = 7.2W, 7.2W * 1H = 7.2wh, 7.2wh/1000wh = 0.0072kwh (degree)
For example, 12v1000ma1 hour:
12V * 1A * 1H / 1000WH = 0.012kwh = 0.012 (degree)
1 degree = 1000kwh
1A=1000MA

Ma pressure unit

Ma is the unit of current
For example, the unit of pressure is: PA / x05kpa / x05mpa / x05bar / x05kgf / cm2 / x05cmh2o / x05mmhg / x05p. S.I
If you need to add a high praise, add a conversion table to you

6. For MA (s) + Nb (g) PC (g) △ H

As the pressure increases, the content of B increases, that is, the equilibrium moves in reverse direction, so n

Bernoulli equation what?

Bernoulli equation: P + ρ GZ + (1 / 2) * ρ V ^ 2 = C
Where p, ρ and V are the pressure, density and velocity of the fluid respectively; h is the vertical height; G is the acceleration of gravity; C is a constant
A direct conclusion is that the pressure is low at high velocity and high at low velocity
Do not know how to ask me, I wish you progress in learning

On Bernoulli equation
If the ball moves horizontally to the left and rotates clockwise around the axis parallel to the ground, the air above the ball moves in the same direction as the ball, while the air below the ball moves in the opposite direction. Therefore, the relative speed above is less than the speed below, the pressure below is less than that above, and the ball moves upward. But in fact, the opposite is true. Why not copy it? OK, I will add points

Bernoulli equation: when an ideal barotropic fluid is in steady motion under the action of potential force, the equation of motion (Euler equation) is obtained by integrating along the streamline to express the conservation of mechanical energy of the fluid in motion. For the incompressible homogeneous fluid in the gravity field, the equation is p + ρ GZ + (1 / 2) * ρ V ^ 2 = C, where p, ρ, V min

On Bernoulli equation
p+ρgh+(1/2)*ρv^2=C
1. P in the equation refers to the pressure? Isn't the pressure in the liquid p = ρ GH? What's the difference with the following ρ GH?
2. This equation means that the sum of kinetic energy, gravitational potential energy and pressure at this point in unit volume is constant. How to understand "unit volume"? Where is the pressure at this point?
3. What do "static pressure" and "dynamic pressure" refer to in the formula?
4. What is the application of this equation? For example, how is it applied to lift?
Just for understanding

1. P is the pressure, Bernoulli equation is the equation of flowing fluid, and P = ρ GH is the pressure equation of static liquid, where ρ GH is the gravitational potential energy
2. It's not pressure, it's pressure energy. Unit volume refers to a cube that grows to 1 (the unit can be offset in the formula). So in fact, in the equation, P is multiplied by an area of 1 to get the force, and then multiplied by a high 1 to get the energy. Gravitational potential energy and kinetic energy are respectively multiplied by a volume of 1, because they are all multiplied by 1, so they are ignored
3. The dynamic pressure is p and the static pressure is ρ GH

What is the Bernoulli equation

Bernoulli equation is set in the thin tube in the right figure. There is a steady flow of ideal fluid, and the flow direction is from left to right. We cut a section of fluid at A1 and A2, that is, the fluid between A1 and A2, as the research object. Let the cross-sectional area of A1 be S1, the flow velocity be V1, and the height be H1

The physical and geometric meaning of Bernoulli equation?

Physical meaning: when the velocity increases, the pressure decreases. When the velocity decreases, the pressure increases
On the other hand, the Bernoulli equation states that the work done by pressure on fluid is equal to the change of kinetic energy of fluid
Geometric meaning: give you an incompressible, inviscid fluid flow field, you will be able to find the pressure field of that flow field. That is to say, you can know the pressure of each point