Carbon and hydrogen are examples of pure substances or

Answers

Answer 1

Answer:

Answer:

Elements

Explanation:

Carbon and Hydrogen are pure substances or elements. All the atoms of carbon have same number of protons. It cannot be broken into new elements.

Contrary to elements, there are compounds which are formed by the chemical bonds between two or more elements like in water. In water, Hydrogen and oxygen elements combine. All the atoms of water do not have the same number of protons. Then, there are mixtures where elements are not chemically bound. For example, air.

Answer 2

Answer: The are elements on the periodic table

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An isometry preserves
orientation
distance
direction

Answers

Answer:

Distance

Explanation:

Isometry preserves the distance while transformation is made in between metric spaces. When a metric space is mapped on to another or itself, the distance between two points remains same in the images in the mapped space as well. Example: rotation and translation.

Thus, isometry preserves the distance.

Answer:

distance

Explanation:

An article in a magazine denies that Earth is warming and climate change is occurring. The writer reports that this season was the snowiest winter on record for the Northeast, with lower than average temperatures for the region. Because of the low temperatures, the writer concludes that climate change cannot possibly be occurring. What question should you ask the writer to clarify whether his stance on climate change is scientifically sound?(A) Did the snowstorms cause extensive damage?
(B) Was this the coldest month on record for this region?
(C) Were the snowfall totals of each storm larger or smaller than last year?
(D) Were long-term temperature changes investigated in addition to short-term change?

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D.
This is likely to challenge the writer's stance because one piece of data cannot accurately depict a long-term trend.`

Answer:

Explanation:

When preparing for a rocket launch, the mission control center uses the phrase "T minus" before liftoff. ...T minus 3, T minus 2, T minus 1, ... After the rocket has launched, "T plus" is used while the rocket is in flight. ...T plus 1, T plus 2, T plus 3, ... When does the rocket launch? What does "T" represent?

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The rocket launches when the countdown reaches "T minus 0." "T" represents the time remaining until a specific event.

What does "T" symbolize in rocket launch countdowns?

In the context of rocket launches, "T" represents time. The countdown begins with "T minus" indicating the time remaining until liftoff. As the countdown progresses, the value of "T" decreases, counting down to zero, which marks the exact moment of launch.

Once the rocket is airborne, the countdown transitions to "T plus," denoting the time elapsed since liftoff. This standardized countdown terminology allows mission control to communicate crucial timing information precisely and efficiently during various phases of the rocket's journey.

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(M G H)=(0.5 x 9.8 x 10) = 49 joules.

A standard light bulb emits light rays in _________ directions.

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Omni-directional. It means all directional.

The process by which a gas changes to a solid is

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The correct answer to the question is - Deposition i.e the process by which a gas changes to a solid is called deposition.

EXPLANATION:

There are various thermal processes of state or phase change in which matter in one state is converted into matter in another state.

Deposition is the type of thermodynamic process of state or phase change in which a gaseous substance is directly converted into corresponding solid substance without entering into liquid phase.

During this process, the loss of thermal energy from gas is very fast. Hence, the gas directly enters solid phase without undergoing into liquid phase.

This process is just the opposite process of sublimation where a solid is converted into gas directly. That's why this process is also known as desublimation.

For instance, conversion of water vapor into ice.

That process is called deposition.

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Which of the following scenarios would cause a sound to stop being produced?A. A molecule moves through its normal position to the opposite side of its normal position. B. A molecule moves in the same direction as a wave. C. The vibration results in a molecule moving vertically. D. The vibration of the point in the medium ends.

Race car drivers must slow down as they make turns on the track. This is best explained by the law of inertia. Which statement best describes inertia for the car going around a turn? A) A body in motion stays in motion at the same speed. B) The speed of the car going into the turn must be conserved. C) The speed around a turn is proportional to the radius of curvature of the turn. D) A body in motion tends to continue in a straight line and requires a force to turn.