Does gravity refer to mass in kilogram or in science?

In science, the weight is in Newton's unit, which means gravity; in real life, the weight is in kilogram. For example, your weight is 100kg, which means that your weight is 200kg (1kg = 2kg)

Does human weight refer to mass or gravity

Mass and weight are Chinese expressions. From a scientific point of view, weight should refer to gravity

How to convert the weight of carbon dioxide and the corresponding pressure
Conversion of carbon dioxide quality and pressure: when a bottle is at 20 ℃, the concentration of carbon dioxide in it is 6G / L, and the bottle is filled with 500ml carbonated beverage. How much is the pressure in the bottle? When the temperature rises to 58 ℃, how much is the pressure in the bottle?

From the equation of state of ideal gas PV = NRT (r = 8.31)
V = 6, t = 20, n is the density of CO2 * 6 divided by the molar mass M
Substituting can calculate a problem!
Second question
The density and volume do not change, that is, m does not change, n does not change, and then t = 58 is substituted to calculate
The way of thinking is like this, you can calculate the specific results yourself!

(3) The price of potato with high starch content is also high. Among the potato varieties that meet the purchase requirements of the factory, the price is relatively low and the flour yield is high___ I don't understand why we need starch content / purchase price,

The higher the starch content is, the smaller the purchase price is, and the higher the starch content / purchase price is. The higher the starch content / purchase price is, the lower the price is, and the higher the flour yield is

1、 A bottle just can hold 1kg of water, it must be able to hold 1kg of ()
1. Kerosene 2. Soybean oil 3. Gasoline 4. Soy sauce
2、 We can't list all the experimental shapes, but we can still draw a conclusion from them. This method of exploring the problem and drawing a conclusion is called————
3、 Some experimental steps for a student to determine the density of kerosene are as follows:
A. Measure the mass m of the empty bottle with a balance
B. Fill the empty bottle with water and measure their total mass m with a balance
C. Fill the empty bottle with kerosene and measure their mass m with a balance
D. Measure the volume V of kerosene in the empty bottle with a measuring cylinder
E. Calculate the density of kerosene
One of the above steps is redundant. Please delete the redundant step in each of the two methods and write down the formula for calculating the density of kerosene determined by this method (it must be expressed by the relevant physical quantity letters in the step)
Method 1: the deleted step is - (fill in the serial number), and the calculation expression of kerosene density is————
Method 2: the deleted step is - (fill in the serial number), and the calculation expression of kerosene density is————
4、 In the physics activity class, Mr. Zhang did an interesting experiment: put a yellow table tennis ball and a glass ball into a beaker with rice. After shaking the beaker for a period of time, the table tennis ball "ran" out of the rice. Seeing this phenomenon, the students were very surprised: why can table tennis "run" out, Why can't the glass ball "run" out
Guess 1. Because table tennis is bigger than glass ball
Guess 2. The quality of table tennis is smaller than that of glass ball
In order to verify whether the conjecture is correct, two days later, students use some equipment to explore
(1) Take three empty plastic bottles a, B and C, put sand of different mass into bottles a, B and C, cover them well, and measure their mass and volume respectively
(2) Put the two bottles into the container filled with rice, knock on the container and observe the phenomenon
(3) The experimental data and phenomena are recorded as follows
Bottle number volume / cm3 mass / g phenomenon
A 22 14.4 run out
B 28 38.6 not running out
C 144 50.2 running out
(4) After analyzing the above data, answer: conjecture 1. (fill in "correct" or "wrong"); conjecture 2. (fill in "correct" or "wrong");). Why do you think table tennis can "run" out of the rice
(5) What problems in life can be solved by using the physical knowledge contained in this phenomenon (give an example or say one of your assumptions), such as: --- --- --- --- --- --- ---

(1) 4
(2) Inductive method
（3）1）.B p=(m3-m1)/v
2) D P = (m3-m1) / [(m2-m1) / pwater]
(4) The density of the wrong table tennis is less than that of the meter

Only the balance can be used to measure the density of milk. There are enough water and two identical beakers available. Please write down the experimental steps and the expression of milk density

1. Adjust the balance
2. Measure the mass of beaker M1
3. Fill the beaker with water and milk respectively, and measure the mass, m water and M milk respectively
4 record data and arrange equipment
M milk-m1
P=——————
V
M water
Where V=————
P water
Pwater (m-m1)
Summary, P=——————————
M water

First, there is a balance (with weights), enough water and a beaker. How can we measure the density of orange juice?

1 empty the beaker and measure the mass M1 on the balance
2. Put the beaker full of water on the balance to measure the mass m2
Put the beaker full of orange juice on the balance to measure the mass m3
Orange juice density = m3 / {(m2-m1) / pwater}

Write the experimental steps, the measured physical quantities, mark the corners, write the expression, preferably write the expression calculation process
Note: many conditions are not very clear, so don't be too serious. The density of high school and the density of water don't necessarily give any consideration
1. Measuring cylinder is not available for Libra (with weight), others are optional
2. One day the Libra (without weight) has a measuring cylinder
3. The measuring cylinder is not optional, and the others are optional
4. Use the overflow cup (I don't quite understand this, I read it in a book, it seems to be very troublesome) one day, the Libra (with weights) has no measuring cylinder

For 1, if regular objects can be measured, first use the balance to measure the mass of the object, and then select the scale to measure the volume of the regular object, so that the density formula can be used to obtain the density
For 2, any solid can be measured. First, put a certain volume of V water into the measuring cylinder, put the object into the water and read V ', then the volume of the object is (V' - V). Then select two beakers of the same specification and put them on both sides of the balance, add water on one side and put the object on the other side. When the balance is balanced, the volume of the water can be read out, and the mass of the water can be calculated by using the formula (the density of the water is known), That is, the mass of the object m, so that the density of the object m / (V '- V) can be obtained
For 3, the volume V can be measured with a measuring cylinder as described in 2, and the mass can be measured with water
For 4, similar to 2, the general overflow cup will be marked with volume

Measuring the density of pepper in the third year of junior high school
There is no balance and measuring cylinder. The density of pepper can be roughly measured with a cylindrical bucket and a scale. It is required to write out the experimental steps and the physical quantities and expressions to be measured

A: 1. Pour proper amount of water into the bucket and measure the water depth H1,
2. Put the pepper into the water to float and measure the water depth H2,
3. Measure the water depth H3 by submerging the pepper in the water with thin wire,
4. Then the density expression of pepper is ρ = (h2-h1) ρ water / (H3-H1)

A problem about measuring density in physics of grade three

No, the mold may be hollow, or the measurement error

Does gravity refer to mass in kilogram or in science?