A science teacher gives a student four beakers, each with a different liquid inside. The table provided shows the volume of each
liquid. Students will need to measure the mass of each liquid in order to calculate the density. When the student mixes all four liquids into one beaker, each liquid separates into a different layer. Using the volume and mass, students will calculate the density of each liquid and list them in order from least dense to most dense. What is the outcome variable (dependent variable) in this experiment? Please Hurry i have until midnight of today! Thank youu so much
the volume of each liquid
the mass of each liquid
the triple beam balance used to calculate mass
the type of liquid
the volume of each liquid
the mass of each liquid
the triple beam balance used to calculate mass
the type of liquid
2 answers:
The concept of density allows finding the density and ordering the liquids from lowest to highest they are:
- dishwashing liquid < vegetable oil < water < corn syrup
- The dependent variable of the experiment is the mass of each body.
Density is the relationship between mas and volume, it is one of the most used relationships in liquids,
where ρ is the density, m the mass and V the volume
Systems of units are systems of measurements where fundamental units are defined by convention and are used to be able to exchange measurements with precision and accuracy. The most widely used system today is the international measurement system (SI), let's reduce the magnitudes to this system
We use that one milliliter of water is equal to 1 cm³ of water
V = 10 cm³ ( )² = 10 10⁻⁶ m³
In this exercise they give that the volume for all the liquids are equal, the mass is a measure in a triple beam balance whose appreciation is 0.1 g = 0.1 10⁻³ kg, in the following table we find the reading of the mass for each substance
Material Mass (10⁻³ kg) Density (kg / m³)
Dish soap 9.1 910
Vegetable oil 9.5 950
Water 9.97 997
Corn syrup 14.2 1420
We calculate the density
Liquid dishwasher
ρ = 910 kg / m³
The other values are calculated in the same way and it is in the last column of the table
The independent variable in an experiment is the one that the researcher controls, in this case the volume of each sample and the dependent variable is the one that the researcher measures in this case the mass of each material.
In conclusion, using the concept of density, we can order the liquids by their density from lowest to highest they are:
- Dishwashing liquid < Vegetable oil < Water < Corn syrup
- The dependent variable of the experiment is the mass of each body.
Learn more about density here:
You might be interested in
Answer:
Linear and rotational Kinetic Energy + Gravitational potential energy
Explanation:
The ball rolls off a tall roof and starts falling.
Let us first consider the potential energy or more specifically gravitational potential energy (;
= mass of the ball,
= acceleration due to gravity,
= height of the roof). This energy comes because someone or something had to do work to take the ball to the top of the roof against the force of gravity. The potential energy is naturally maximum at the top and minimum when the ball finally reaches the ground.
Now, the ball starts to roll and falls off the roof. It shall continue rotating because of inertia (Newton's first law). This contributes to the rotational kinetic energy (;
=moment of inertia of the ball &
= angular velocity).
Finally comes the linear kinetic energy or simply, kinetic energy () which is caused due to the velocity
of the ball.
Answer:
Explanation:
Take at look to the picture I attached you, using Kirchhoff's current law we get:
This is a separable first order differential equation, let's solve it step by step:
Express the equation this way:
integrate both sides, the left side will be integrated from an initial voltage v to a final voltage V, and the right side from an initial time 0 to a final time t:
Evaluating the integrals:
natural logarithm to both sides in order to isolate V:
Where the term RC is called time constant and is given by:
