What dose it mean to say that mass is conserved during a physical change

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Answer 1

Answer:

Answer:

When a physical change occurs, the mass of the substance is conserved. This means that the total mass of the substance remains the same from beginning to end. The physical properties of the substance, such as size and shape, may change, but the amount of matter in the substance does not change.

Explanation:

Answer 2

Answer:

Explanation:

When there is no change in chemical composition of a substance then it is known as physical change.

When we say that mass is conserved during a physical change then it means that total mass of the substance or object will remain the same from beginning till the end.

For example, a metal box of mass 20 grams is beaten with hammer. Its shape will change which is a physical change and after beaten with the hammer its mass still remains 20 grams.

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Choose three nutritional labels off of food packaging. Explain the ingredients and how to read each label in terms of calories, protein, carbohydrates, fats, and percentage of daily recommended dietary value. Assignment Guidelines: Respond in a short essay format of 200 words of at least three well developed paragraphs. Submission Requirements: Submit your essay. When submitting written assignments, please remember to: submit the assignment question(s) and your responses; proofread for spelling, grammar, and punctuation; use complete sentence structure; and make sure each paragraph has a minimum of six sentences.

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Answer

The nutritional label (also referred as Nutrition Facts) gives detailed information about a food's nutrition content: the amount of fat, proteins,calories...Nutrition fact help us to make healthy food choices.Proteins are build from amino acids and contribute energy (calories) to the body). Protein should account for 10-35% of your daily calorie intake. Carbohydrates are the main source of energy of the body. Carbohydrates should account 45-65 % of your daily calorie intake. Calories are units to measure energy. The amount of daily calories needed depends on gender, age,height, way of life.According to this, the percents in the Nutritional labels point how much from your total daily needs the specific food is.

Explanation:

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gives information of nutrients

Explanation:

When in orbit, astronauts experience weightlessness what is this caused by?

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no gravity or dark matter

the answer for ur question

no gravity or dark matter

If you are driving 128.4 km/h along a straight road and you look down for 3.0s, how far do you travel during this inattentive period?

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Answer:

107 m

Explanation:

Convert km/h to m/s:

128.4 km/h × (1000 m / km) × (1 h / 3600 s) = 35.67 m/s

Distance = rate × time

d = 35.67 m/s × 3.0 s

d = 107 m

What does sealant restorations mean?

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Sealants are used to protect healthy teeth that have a high potential for decay. Most often, these are the molars with deep grooves. A PRR, preventive resin restoration, is a type of filling that is placed when a cavity has begun and is infiltrating the grooves in the chewing surface of the tooth............

The pitch of a note corresponds to which property of sound wave

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A high pitch sound corresponds to a high-frequency sound wave and a low pitch sound corresponds to a low-frequency sound wave. So, the pitch of a note corresponds to the amount of frequency of a sound wave. Hope this helped!

Why does an object in motion stay in motion unless acted on by an unbalanced force? A) because forces are what stop and start motion

B) because balanced forces can not exist in nature

C) because motion is the inherent state of all matter

D) because motion, once begun, continues to accelerate

Answers

Answer: A) because forces are what stop and start motion

Explanation:

From Newton's first law, an object tends to stay in state of rest or motion unless acted upon by an unbalanced external force. This is also known law of inertia. This is because a force can stop or start a motion. A force cause body to accelerate to decelerate otherwise the body continues with constant speed.

An object in motion stays in motion unless acted on by an unbalanced force A) because forces are what stop and start motion

Further explanation

In Newton's first law, it is stated that if the resultant force acts on an object of magnitude is zero, it can be formulated:

$\large{\boxed{\bold{\sum F=0}}$

then the object tends to defend itself from its state.

or can be stated:

An object at rest stays at rest and an object in motion stays in motion unless acted upon by an unbalanced force.

So for objects in a state of movement, objects tend to move forever. Likewise, for objects in a state of rest, they tend to remain forever. The tendency of objects like this is called inertia

The size of inertia is proportional to mass, the greater the mass of the object, the greater the inertia of the object.

In objects with mass that move translatively, the object will maintain its linear velocity

Forces are balanced when all the forces act upon an object balance with each other

Forces are unbalanced when there is an individual force that is not being balanced by another force

So the object in balanced forces:

1. object at rest v = 0, a = 0

2. object at motion v ≠0, a = 0

Let see the answer choices

A) because forces are what stop and start motion

If there is an unbalanced force, the object will tend to move from the rest position or the object changes its state of motion.

Statement is true

B) because balanced forces can not exist in nature

Balanced forces can exist in nature for example. For example a person standing on the floor. There are two forces. The force of gravity and the floor for upward force, thus the person maintains its state (rest motion). So this condition is called a state of balance or balance.

Statement is false