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2 years ago

Before a rifle is fired, the linear momentum of the bullet-rifle system is zero.

Physics

1 answer:

marusya05 [52]2 years ago

3 0

Hi there!

II. Linear momentum of the system is zero.

This is an example of a RECOIL collision. With the Law of Conservation of Momentum, momentum remains constant before and after the collision.

Thus, the total momentum would also be equivalent to zero after the collision.

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True or False. In a parallel circuit, the voltage is the same anywhere in the circuit.

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True! hope this helps:)

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3 years ago

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Grape juice solid-conduction , solid-convection,fluid-conduction , fluid-convection

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The process by which the heat energy is transmitted between the atoms or molecules is known as conduction.

Explanation:

Conduction is the transfer of heat through the material that are caused by temperature gradient with the material ends in heat flux. The heat transfer done by movement and mixing of a fluid is known as convection.

If a fluid is taken and it is kept as stationary. If there is a temperature gradient across that fluid, there would be transfer of heat that occurs in the fluid. It is negligible when compared to convective heat transfer.

Because of the heat transfer from solid to solid, density of liquid changes and start to move in upward direction due to low density. This type of motion is known as convection currents.

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3 years ago

A child pulls a wagon with a force F at an angle o with respect to the horizontal. Which of the following free body diagrams is

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Option d) is the correct free body diagram.

Explanation:

A free-body diagram is a diagram that shows all the forces acting on a body. Each force is represented using an arrow, where:

- The length of the arrow is proportional to the magnitude of the force

- The direction of the arrow corresponds to the direction of the force

For the block in this problem, we have the following forces:

- The force F applied from the child, which acts at an angle with respect to the horizontal --> this rules out option a) and c), where the force acts horizontally

- The force of gravity (the weight of the object), labelled with W, which always acts downward --> this rules out option b), since the weight acts downward.

Therefore, the correct option is d).

(in reality, there should be another force: the normal reaction exerted by the floor on the block, N, acting upward).

Learn more about forces and weight:

brainly.com/question/8459017

brainly.com/question/11292757

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3 years ago

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2 years ago

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The table below shows the pH of four body fluids and the resulting color when each

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Answer:

Gastric juice is an acidic substance ( Strongly acidic)

Explanation:

According to the table shown in the question:

Gastric juice turns blue litmus paper to red
It is neutral to red litmus

Note: Any substance that turns blue litmus paper red and is neutral to red litmus paper is an acidic substance.

Moreover, gastric juice is a combination of Pepsin and HCl and it has a PH that varies between 1 and 3. This PH is typical of a strongly acidic substance.

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3 years ago