As a liquid is added to a beaker, the pressure exerted by the liquid on the bottomof the beaker
A decreases
B stays the same
C increases

Answer:

Explanation:

This problem is an example of a perfectly inelastic collision. After the collision, the two cars merge into a single object. So in order to find the velocity of that object, we need to find the velocity of the center of mass of the given system of 2 cars.

Mass of Ford = = 2080 kg

Mass of truck = = 18400 kg

Velocity of Ford = = 22.6 m/s north

Velocity of truck = = 10.4 m/s east

Let us break up the velocity vector into 2 components, one along north () and one along east ().

Therefore,

(speed of truck along the north is zero)

Similarly,

(speed of Ford along the east is zero)    

Hence, the resultant speed of the entangled cars is given by,

and the direction is given by (please refer to the figure attached),

Final answer:

The post-collision speed and direction of the two entangled vehicles, calculated using principles of momentum conservation and trigonometry, are found to be 9.82 m/s and 76.4 degrees east of north respectively.

Explanation:

In this scenario, we are dealing with the principles of momentum conservation. In a collision like this one, the total momentum before the collision equals the total momentum after the collision, as long as no external forces are acting on the system. The momentum (p) of an object is calculated as the mass (m) of the object multiplied by its velocity (v), or p=mv.

Before the collision, the total momentum of the system (ptotal) is the sum of the momentum of the Ford Explorer (pExplorer) and the garbage truck (ptruck). After the collision, they move together as a single object, so their combined mass and velocity would make up the total momentum.

Based on the given information, pExplorer = 2080 kg * 22.6 m/s = 47,008 kg*m/s and ptruck = 18400 kg * 10.4 m/s = 191,360 kg*m/s. The direction should also be taken into account. Since they are perpendicular to each other, we can use the Pythagorean Theorem to find the resultant momentum: (pExplorer)^2 + (ptruck)^2 = ptotal^2, which gives a total momentum of 201,262.8 kg*m/s.

Now, the total mass (mtotal) of two entangled vehicles is 2080 kg + 18400 kg = 20480 kg. Hence the velocity (v) of the two vehicles after the collision is calulated by ptotal divided by mtotal : 201262.8 kg*m/s / 20480 kg = 9.82 m/s. The direction is calculated using trigonometrics such as tan(-1)(ptruck / pExplorer) which gives a direction of 76.4 degrees east of north.

Learn more about Momentum Conservation here:

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Answer: Form a hypothesis

A scientific way to investigate a problem involves mainly five steps.

→A question or problem must be formulated in the first step.

→After gathering the background information, A hypothesis must be made.

→Third step would be to design an experiment.

→Fourth step would include collection and recording of data.

→Fifth step would include the conclusions drawn from the experiment and communication of hypothesis and its results.

When  the scientist notices that a dark colored peppered moth over light colored background, he formulates a question: whether the difference in visibility affects the survival rate of dark moths or not? Therefore, next step in the scientific method would be to gather more information on the subject and formulate a hypothesis.

Answer:

the correct simple answer is B

Explanation:

Answer;

X-ray scanners

Explanation;

• Diagnostic imaging techniques in the field of medicine help in determination of the causes of an injury or illness and also ensures accurate diagnosis.
• X-rays are examples of these diagnostic imaging techniques.

• X-ray scanners are commonly used to diagnose fractured bones or joint dislocation. X-rays are the fastest and easiest way for doctors to view and assess bone fractures, injuries and joint abnormalities.
• X-ray used for the bones uses small amount of ionizing radiation to generate pictures of bones in the body.