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What was J J Thomson's hypothesis when he observed that rays bend toward a positively charged plate and give a negative charge to objects they strike?
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A statement that can be tested is called?
This is one definition of a hypothesis, an explanation for observed phenomena that can be tested for its correctness or accuracy.
Does gravity pull objects apart?
In order for that to happen, one object must be positive mass and the other one must be negative mass. Negative mass has never been observed yet, so gravity has never been observed to push objects apart.
What is planck hypothesis?
If a physical system executes a simple harmonic motion in one dimension with frequency (v), it can take only those energy values E, given by E=nhv where n=1,2,3,4,... h is called a Planck 's constant which is 6.625X10-34 Joule-sec. The implication of this hypothesis is that the radiation emitted or observed by electromagnetic radiation is also quantized. the electromagnetic radiation is viewed as if it is composed of tiny particles called photons.
Is gravity a force that can attract and repel?
If there were such a material as negative mass, then the formula for the force of gravity predicts that a negative and a positive mass would repel each other. But nothing has ever been discovered yet that behaves like negative mass, so as far as has ever yet been observed, gravity is always an attractive force.
Why is gravity a pull?
The forces of gravity are always 'attractive' ... pulling masses together.According to the math that describes the process, the forces of gravity wouldpush two objects apart if one of them were composed of 'negative mass' ...just like one positive electrical charge and one negative charge repel eachother. So far, however, negative mass has never been observed, even in thelaboratory, and we don't see anything going on anywhere in the observableuniverse where it appears as if objects are repelling each other.
What was J J Thompson's hypothesis when he observed that rays bend toward a positively charged plate and give a negative charge to objects they strike?
He hypothesized that cathode rays are streams of electrons or negative charges
What evidence supported thomsons hypothesis that the negative particles he observed from inside atoms?
Thomson had two pieces of evidence: 1- No matter what metal he used for the disk, the particles produced were indentical. 2- The particles had about 1/2000 the mass of a hydrogen, the lightest atom. These experiments provided the first evidence that atoms are made of even smaller particles.
Why is hypothesis could be rejected?
To reject null hypothesis, because there is a very low probability (below the significance level) that the observed values would have been observed if the hypothesis were true.
How can a scientific hypothesis be used to answer a specific question an observed phenomenon?
A hypothesis can suggest an explanation for an observed phenomenon that can later be tested through experimentation
What is a possible explanation for something that has been observed?
a hypothesis.what is logical explanation for events observed in natureA hypothesis
How is a hypothesis and a theory alike?
Both a hypothesis and a theory offer an explanation of some observed phenomenon. The difference is that a hypothesis must have confirmation to become a theory.
A statement that can be tested is called?
This is one definition of a hypothesis, an explanation for observed phenomena that can be tested for its correctness or accuracy.
What is Hypothesis Testing of p-value?
The probability of the observed value or something more extreme under the assumption that the null hypothesis is true. That is, the probability of standard scores at least as extreme as the observed test statistic.
How can a scientific hypothesis be used to answer a specific question about an observation phenomenon?
A hypothesis can suggest an explanation for an observed phenomenon that can later be tested through experimentation
What do scientists use to answer questions?
The scientific process. 1. Observe 2. Create a hypothesis to explain what you observed 3. Experiment to test your hypothesis
What is example of a hypothesis?
A hypothesis is actually a "proposed explanation" of observed phenomena which can be tested for accuracy. For example: Spines on cacti reduce herbivore damage
Does a scientific hypothesis describe an observed pattern in nature without attempting to explain it?
False
