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Science Experiments
Experiments often conducted by students to test different scientific theories and hypotheses
11,111 Questions
What is each repetition of an experiment called?
Each repetition is called a trial or sometimes a replicate.
Why do you need to repeat your experiment?
To reduce Random and Systematic errors that may have occured during the experiment, by taking their average. This can get the most accurate value.
What is the control group in an experiment using soil with compost and seeds?
Soil with seeds is a control group in an experiment using soil with compost and seeds. The results will indicate the role of dark-colored, fresh-smelling, nutrient-rich humus in the appropriate timing and proper development of seeds.
What is the term or phrase used to describe a failed experiment due to wrong hypothesis?
A failed experiment resulting from a wrong hypothesis is often referred to as a "null result." This term indicates that the experimental outcome did not support the initial hypothesis, highlighting the need for further investigation or a revised hypothesis. Additionally, such experiments can contribute to the scientific process by refining theories and guiding future research.
Can An experiment can have more than one independent variable?
Sure. Take a sealed balloon full of air. Keep changing its pressure and temperature,
and keep track of what happens to its volume.
What are good science fair project titles involving eyes?
"Do you see what eye see?" "Eyes, most important muscle." Those could be some good names ;D
What is meant by a controlled experiment?
A controlled experiment is one in which a control group is closely monitored. In this way, the experiment can be much more accurate as more factors are accounted for.
Could you power a car scooter or bicycle with lemons?
It is possible to make a battery with lemons. A lemon battery, using two or three lemons, can power a buzzer or a small digital clock. However, it would take thousands of lemons to power a bicycle or scooter and millions to power a car!
What best describes the word hypothesis?
It is an idea, which the person setting out the hypothesis may believe is true.
What part of an experiment is the set up that doesn't get the special treatment?
The part of an experiment that doesn't receive the special treatment is called the control group. This group serves as a baseline for comparison, allowing researchers to determine the effects of the treatment or intervention applied to the experimental group. By keeping conditions the same for both groups, any differences in outcomes can be attributed to the treatment being tested.
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Would different colored mints dissolve at the same rate?
Most likely yes, as the color of the mint is generally a result of food coloring or artificial dyes that do not affect the rate of dissolution. The key factors that determine the dissolution rate of a mint would be its composition, surface area, and contact with the solvent.
Is the purpose of an experiment to test the hypothesis?
Yes, the purpose of an experiment is usually to test a hypothesis and determine whether it is supported by the data collected during the experiment. The experiment is designed in a way that allows researchers to make observations and draw conclusions about the hypothesis under investigation.
Will steel spoon attract pieces of paper when rubbed with polythene and woolen cloth?
No, rubbing a steel spoon with polythene and woolen cloth will create static electricity on the surface of the spoon, causing it to attract pieces of paper.
A hydro-pneumatic car uses a suspension system that combines hydraulic fluid and air to provide a smooth and adjustable ride. These systems are known for their ability to automatically adjust to different road conditions and provide a comfortable driving experience. They were commonly used in older models of cars produced by manufacturers like Citroën.
Answer 1
It means the change in speed is a constant, over the time interval in question. Another view is to plot speed versus time, you would get a straight line with a constant slope. For the geeks, it means the function representing distance versus time is a quadradic (power of 2), so that the second derivative (acceleration) is a constant. For example if the distance versus time is
D=3T**2
then the speed at any point in time is (the 1st derivative)
S=6T
and the acceleration is the 2nd derivative
A=6
which is no longer dependent on time (ie: it is a constant).
Answer 2
Deceleration is the negative form of acceleration, meaning when something is slowing down, i.e. that the velocity keeps decreasing as time keeps increasing until velocity reaches 0.
The uniform part concerns the rate of the slowing. Deceleration can have jerk, meaning that the change in velocity between two equidistant points in time is different. Uniform deceleration lacks jerk, meaning that all changes in velocity over time are constant. In lay men's terms, for example, when you stop a car by applying the breaks, the speed of the car might decrease from 35 to 30 miles per hour in one second and then decrease from 30 to 20 miles per hour in the next second. This shows jerk because in the first instance the deceleration was half of the second deceleration. If the example were changed so that in the second second, the speed dropped from 30 to 25 miles per hour, this would be uniform.
Therefore uniform deceleration is when something slows down at a consistent rate.
What does the word independent means in science?
Independent means that it is a variable that is unaffected by other variables.
For example, in terms of acceleration, velocity is the dependent variable, and time is the independent variable. Velocity is dependent upon time, but time is not dependent upon velocity.
Of course, technically speaking, this is only for nonrelativistic scenarios. If velocity is extreme (near the speed of light) time IS affected by velocity in spacetime. But, that's a different issue.
What were the main objectives to use hydraulics?
One use of hydraulics: we can use a small force to lift heavy objects. For example in a closed hydraulic system, if one piston has a surface area of 1 square inch, applying 10 pounds of force to this piston adds 10 psi (pounds per square inch) pressure to the system. Since pressure is the same throughout the system, then the other piston also has 10 pounds per square inch. If the surface area of that piston is 10 square inches, then each square inch has the same 10 psi, so the total force on the larger piston is 100 pounds.
You do not get something for nothing, though. The volume of this system is constant, so if you want the larger piston to move 1 inch (that's 1 inch times 10 square inches = 10 cubic inches), then the small piston must move 10 inches (10 inches times 1 square inch = 10 cubic inches).
This makes us think that doing something useful, like lifting a car 5 or 6 feet off the ground, so that we can work under it, seems impractical. A power assisted hydraulic system uses a pump to increase the pressure, rather than a simple piston.
What is the Lunar Laser Ranging experiment?
The Lunar Laser Ranging experiment is the ongoing meaurement of the distance between planet Earth and the moon. The measurment is calculated by using a laser.
The best route to the answer is right there in your question. The appearance
of your question here demonstrates that you're perfectly able to "use the web",
and therefore that you can come up with the answer every bit as soon as
anyone here can.
How does the colour black atracted the sun?
The question is quite meaningless. The sun doesn't attract color, color doesn't
attract the sun, and black is not a color ... it's the absence of light of any color.
Why is a control set in a experiment so important?
When performing an experiment it is very important to have a control set. It is important to have a control set because it ensures that the experiment can be repeated as many times as necessary.
