toothpaste in reducing
cavities?
How does the daytime
• temperature affect the
formation of dew at night?
Which is a better absorber
of heat, an object painted
black or the same object
painted white?
Can plants prepare food
even in artificial light?
Why does a rolling ball slow
down as it moves?
Answer:
Following questions are better answered by observational study:
- How does the daytime temperature affect the formation of dew at night?
- How effective is a new toothpaste in reducing cavities?
Following questions are better answered by controlled experiment:
- Which is a better absorber of heat, an object painted black or the same object painted white?
- Why does a rolling ball slow down as it moves?
- Can plants prepare food even in artificial light?
Explanation:
An observational study is one in which the researcher doesn't manipulate anything.
In a controlled experiment, the researcher manipulate the outcome of the experiment and controls the factors that might affect the experiment to see different results in different conditions.
So, for questions over which research do not have any control, mostly natural processes, observational study is a better option.
However, to check why a rolling ball slow down, controlled experiments are done to find out all the factors.
Plants placed in artificial light is also an controlled experiment as the researcher will himself place the plants in artificial light and keep them away from natural light.
Similarly, to check if color of the object affects the amount of heat absorbed by that object, a controlled experiment must be performed. Same object should be painted white and observed and then painted black and observed.
Answer:
6Ω
Explanation:
The 6Ω resistor and the 3Ω resistor are in parallel.
R = 1 / (1/6 + 1/3)
R = 1 / (1/6 + 2/6)
R = 1 / (3/6)
R = 6/3
R = 2
The 8Ω resistor and the other 8Ω resistor are also in parallel.
R = 1 / (1/8 + 1/8)
R = 1 / (2/8)
R = 8/2
R = 4
This 4Ω resistance is in series with the 4Ω resistor.
R = 4 + 4
R = 8
The 2Ω resistor and the 6Ω resistor are also in series.
R = 2 + 6
R = 8
These two 8Ω resistances are in parallel.
R = 1 / (1/8 + 1/8)
R = 1 / (2/8)
R = 8/2
R = 4
Finally, this 4Ω resistance is in series with the 2Ω resistance we found earlier.
R = 4 + 2
R = 6
The total equivalent resistance is 6Ω.
Answer:
Albert Einstein and issac Newton
Explanation:
Answer:
a and d
Explanation:
edge 2021
greater is the keword here
When the pressure at the bottom of a submerged object is less than the pressure at the top of the submerged object a buoyant force is produced?
1.How close it is to the sun?
2.Length of the time to orbit the sun.
3.If they have moons,how many?
4.Describe the Surface And Atmosphere.
6.Size of the planet
7.How does it rotates (Direction)
8.If they have rings,How many?
9.The diameter of the planet
10.The temperture of the planet.
11.Does the planet has other names? What are they?
12.Definition of Terrestrial
13.Definition of Jovian