6. Tommy and John are trying to move a large table. John pushes with a force of 1150N and Tommyhelps him by pushing on the same side of the table with a force of 800N. Sketch the individual forces exerted on thetable and then calculate and show the net force exerted on the table.
Answer:
Net force = 1150 + 800 = 1950 N
Explanation:
The diagram above illustrate the force applied to the large table by Tommy and John. The force are exerted in the same direction . The first arrow represent the force applied by John which was 1150 Newton and the second arrow represent the force exerted by Tommy which was 800 newton. There was no opposing force indicated like gravity from the question so no need to sketch that.
The forces were applied in the same direction, therefore, the Net force can be computed by adding their individual forces .
Net force = 1150 + 800 = 1950 N
Answer: cycling is important because it saves our ecosystem and without out it we don't have water bottles anything plastics,etc.
Explanation:
2.) Animals are made of non–cell-based matter.
3.) Plants are made of non–cell-based matter.
4.) Cells can generate from nonliving matter.
Answer:
all these people put long sentences so here the answer is cells can generate from nonliving matter
Explanation:
I did the test :)
Answer:
Virchow was a German scientist whose most important work was in the filed of cellular biology and pathology.His scientific experiments and examinations aimed to disprove the idea of spontaneous generation. This idea is based on an assumption that life can spontaneously appear out of non-living matter. After years of scientific work he concluded that only living cells can produce other cells, or that only life can produce life.Therefore, if it was somehow proven that cells can be generated from non-living matter, that would disprove his findings.
Explanation:
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When a substance undergoes a physicalchange, its chemical composition remains the same, and there is no formation of new substances.
A physical change is a process in which the physical properties of a substance are altered, but its chemical composition remains unchanged. In other words, the substance does not undergo a chemical reaction, and no new substances are formed. Instead, the changes observed are related to the state of matter or the physical properties of the substance.
Examples of physical changes include changes in state (such as melting, freezing, boiling, or condensing), changes in shape or size (like cutting, crushing, or bending), and changes in appearance (such as dissolving, mixing, or separating). These changes are usually reversible, and the substance can often be restored to its original state by reversing the process.
One characteristic of physical changes is that they do not involve the breaking or forming of chemical bonds between atoms or molecules. The individual particles of the substance (atoms, ions, or molecules) remain the same before and after the change. For example, when ice melts into liquid water, the water molecules remain H₂O molecules throughout the process.
In contrast, chemical changes (also known as chemical reactions) involve the rearrangement of atoms and the formation of new substances with different chemical properties. In a chemical change, the original substances are consumed, and entirely new substances are produced.
Understanding the difference between physical changes and chemical changes is essential in various scientific fields, including chemistry and materials science. It helps scientists distinguish between alterations in the physical appearance of a substance and fundamental changes in its chemical nature.
To learn more about physical changes, here
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The complete question is:
What happens when a substance undergoes a physical change?
Answer:
HERES ALL THE TEST ANSWERS
Explanation:
Physical Properties
1-What happens when a substance undergoes a physical change?
answer-Some physical properties change, but the substance keeps its identity.
2-What is an example of a physical change?
answer-ice forming and then melting back into water
3-When liquid gold becomes a solid, its particles get closer together. Which best describes what happened to the gold?
answer-the rearrangement of particles in a physical change
4-Eugene describes the physical property of a material as “sweet and floral.” What physical property of the material is Eugene most likely observing?
answer-odor
5-Which can occur during physical change?
answer-The particles can arrange in different ways.
6-If there is 8 g of a substance before a physical change, how much will there be afterwards?
answer- 8 grams
7-Which statement about the physical change of liquid water boiling into steam is true?
answer-the heat added represents an energy change
8-Fifteen grams of a liquid plastic are frozen in a physical change that increases the volume. What can be known about the plastic after the change?
answer- it will still weigh 15 grams
9-Which statement best compares and contrasts two physical properties of matter?
answer-Boiling points and melting points are similar because they both involve the change in a state of a material, but they are different because boiling point involves a change from a liquid to a gas and melting point involves a change from a solid to a liquid.
10-Serena is mixing a material into a beaker filled with a liquid. She notices that the material seems to disappear into the liquid. What physical property of the material is Serena most likely observing?
answer-solubility