Explain why it is sometimes necessary for scientists to replace a scientific model?

Answers

Answer 1

Answer: New evidence may be discovered which does not fit into the explanations of the old model so a new model must be created.

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A stuntman jumps from the roof of a building to the safety net below. How far has the stuntman fallen after 2.3 seconds? A. 25.9 m B. 21.2 m C. 9.8 m D. 11.3 m
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The blank are the specialized tubes in the kidneys in which waste is collected from the blood
Is this statement an observation or an inference? It must be raining outside. Explain.

Which is the SI base unit for distance?

A. cm

B. km

C. m

D. mm

I think its C.m

Answers

Yes you're correct. For distance, SI is based on meters.

In DC motor, the split rings are made of
A) steel B) copper C) wood D) glass

Answers

Answer:

B)Copper

Explanation:

The DC motor is provided with some devices or the parts to periodically change the direction of the current in the motor. way as that of the armature rotation. The split rings are made up of the copper and the spindle connected to it is made of carbon.

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Which device provides electrical energy to run an electric circuit

Answers

The battery provides electrical energy to run an electric circuit

Use free fall in a sentance

Answers

Free fall means rapid fall or a downward motion due to gravity. Sentence example: When Joe was accidentally bumped by Sarah, he was sent towards a free fall down the escalator, leading to a serious injury on his arm and two legs.

the jumpers were required to free fall for 8 second

In a solution, the substance that does the dissolving is called Blank Space __________.solute

solvent

saturated

precipitate

Answers

The answer is Solvent. The reason is in the wording, 'the substance that does the dissolving.' A solvent does the dissolving, a solute is something that can be dissolved.

Answer:

solvent

Explanation:

Ele is playing with a ball in a bus that moves in a straight line with constant velocity What can you say about the motion of the body in the movingbus if Elle throws the ball vertically upwards?

Answers

Answer:

The ball will fall back and land to Elle's hands.

Explanation:

The bus move in a straight line with constant velocity means that there is no change of direction and no acceleration. Inertia can change the direction of the ball and acceleration can change its velocity. Since these two factors is not present in this scenario, the ball only has vertical movement. Thus the ball will land where it was thrown, in Elle's hands.

Correct Answer:

The ball will fall back to Elle's

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