WGU Integrated-Physical-Sciences Dumps PDF Free Download

QUESTION: 9

A scientist measures the change in temperature from a chemical reaction over a three-day period in a single experiment.
When the scientist analyzes the data, the results are five degrees Celsius higher than reported by other scientists after studying the same reaction.

How can the scientist appropriately resolve this problem?

Only include data that matches the results from previous studies
Publish the results as a contradiction to the previous studies
Perform the experiment again
Discard all of the data and report that the results should have matched previous studies

Answer(s): C

Explanation:

When a scientist's results differ significantly from those reported by others, the appropriate action is to perform the experiment again. Repeating the experiment helps to ensure that the results are accurate and reliable. It allows the scientist to verify their findings and check for any possible errors in the experimental process.

Reference:

Integrated Physical Sciences, Chapter 2: Methods of Scientific Investigation

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QUESTION: 10

A group of scientists perform an experiment involving the interaction of protons colliding at high energies. The results of their experiment contradict current theories regarding these proton interactions.

What is the appropriate response in light of the results of this experiment?

The current theory should be modified to match the findings of this experiment.
The results of this experiment should be discarded.
Other experiments should be done to confirm the findings of this experiment.
The scientists should change the results of their experiment to be consistent with current theories.

Answer(s): C

Explanation:

When experimental results contradict current theories, it is essential to conduct additional experiments to confirm the findings. This approach ensures that the results are not due to experimental error and provides a robust basis for re-evaluating or potentially modifying existing theories. Scientific theories are refined and improved based on new, reliable evidence.

Reference:

Integrated Physical Sciences, Chapter 2: Methods of Scientific Investigation

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QUESTION: 11

In 1996, NASA scientists claimed that a Martian meteor contained chemical compounds that indicated life on Mars 3.6 billion years ago. However, further studies showed that the same chemical compounds were found in rocks from the Moon, where no life ever existed.

What is the appropriate scientific approach for dealing with this contradiction?

Accept the idea that there has been life on Mars because the scientists worked for NASA
Determine that the chemical compounds that were found do not necessarily indicate life
Decide that life could never have existed on Mars because the chemicals are also found on the Moon
Conclude that there must have been life on the Moon at some time in the past

Answer(s): B

Explanation:

**Identify the contradiction:** NASA scientists found chemical compounds in a Martian meteor that suggested the possibility of ancient life on Mars. However, similar compounds were also found in Moon rocks, where life is not believed to have existed. - **Analyze the evidence:** The presence of these compounds on both Mars and the Moon suggests that these compounds are not unique indicators of life. - **Scientific approach:** To resolve the contradiction, scientists must consider the broader context and properties of these compounds. The appropriate response is to recognize that the compounds alone do not provide conclusive evidence of life. This requires a cautious interpretation of the findings and a search for additional, more definitive indicators of life. - **Conclusion:** The correct approach is to understand that these chemical compounds do not necessarily indicate life, as their presence can be attributed to non-biological processes as well. **

Reference:

** Integrated Physical Sciences textbooks, scientific journals on astrobiology, and NASA reports on Martian and lunar geology.

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QUESTION: 12

In 2011, scientists reported on an experiment in which neutrinos appeared to travel faster than light. This result was remarkable because it violates Einstein's theory of special relativity, which has been a cornerstone of our understanding of physics since 1905.

What is the appropriate scientific approach for dealing with this contradiction?

Check the experimental setup and try to replicate the results
Change the new data to show speeds lower than the speed of light
Abandon Einstein's theory because it has been proven invalid
Ignore the new data because it contradicts Einstein's idea

Answer(s): A

Explanation:

*Understand the claim:** In 2011, scientists observed neutrinos that appeared to travel faster than light, which would contradict Einstein's theory of special relativity. - **Scientific principles:** Einstein's theory of special relativity has been extensively validated and is a cornerstone of modern physics. Any claim that contradicts it requires thorough investigation. - **Appropriate response:** The scientific method dictates that extraordinary claims require extraordinary evidence. The first step should be to check the experimental setup for errors or anomalies that could explain the unexpected results. - **Replication:** Independent replication of the experiment is essential to confirm or refute the findings. If other scientists can replicate the results under controlled conditions, the claim gains credibility. Otherwise, the initial results are likely due to experimental errors. - **Conclusion:** The best approach is to critically evaluate the experiment and attempt to replicate the results, ensuring the integrity of the scientific process. **

Reference:

** Peer-reviewed journals on particle physics, reports from CERN, and documentation on the principles of the scientific method.

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QUESTION: 13

Two identical cars travel one behind the other The rear car is traveling faster and stakes the front car in a rear end collision as shown in the figure below

What happens to the velocities of the two cars, assuming that the collision is completely elastic?

q Both cars slow down.
Both cars speed up.
The front car slows down and the rear car speeds up.
The front car speeds up and the rear car slows down.

Answer(s): D

Explanation:

**Assumption:** The collision is completely elastic, meaning no kinetic energy is lost. - **Principles of elastic collisions:** In an elastic collision, both momentum and kinetic energy are conserved. - **Velocity changes:** When two identical cars collide elastically, the car that was moving faster (rear car) will transfer some of its kinetic energy to the slower-moving car (front car). As a result, the rear car slows down, and the front car speeds up. - **Conclusion:** The velocities of the two cars will change such that the front car speeds up and the rear car slows down after the collision. **

Reference:

** Textbooks on classical mechanics, principles of conservation of momentum and energy, and problem-solving resources on elastic collisions.

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QUESTION: 14

The gravity exerted by Planet X is less than the gravity exerted by Planet Y.

If a ball were launched upwards on each planet with the same amount of net force, what would the difference be in the acceleration of the ball?

It will initially accelerate more on Planet X.
It will accelerate the same amount on Planet Y and on Planet X.
It will remain still in both cases.
It will initially accelerate more on Planet Y.

Answer(s): A

Explanation:

*Gravitational force comparison:** Planet X has less gravity than Planet Y. - **Acceleration due to force:** The acceleration of an object is given by \( a = \frac{F}{m} \). With the same force applied, the acceleration will be higher where the gravitational pull is weaker. - **Initial acceleration:** Since Planet X has less gravity, the same force will cause the ball to accelerate more on Planet X than on Planet Y. - **Conclusion:** The ball will initially accelerate more on Planet X. **

Reference:

** Physics textbooks on Newton's laws of motion, principles of gravitation, and kinematics.

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QUESTION: 15

Ball 1 is moving and ball 2 is still. Both balls have the same mass.

What happens to the motion of the two balls if ball 1 strikes ball 2 head on in an elastic collision?

Ball 1 stops, and ball 2 moves at the velocity ball 1 had before the collision.
Ball 1 and ball 2 both move in the direction that ball 1 was initially moving, but ball 1 moves twice as fast.
Ball 1 and ball 2 both move in the direction that ball 1 was initially moving, but ball 2 moves twice as fast.
Ball 2 remains at rest, and ball 1 moves at twice its original velocity.

Answer(s): A

Explanation:

**Elastic collision with equal masses:** When two identical masses collide elastically, the moving ball (ball 1) will transfer all its momentum to the stationary ball (ball 2). - **Post-collision velocities:** After the collision, ball 1 will come to rest, and ball 2 will move with the same velocity that ball 1 had before the collision. - **Conclusion:** Ball 1 stops, and ball 2 moves at the velocity ball 1 had before the collision. **

Reference:

** Classical mechanics textbooks, conservation of momentum and energy in elastic collisions, and resources on head-on collisions.

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QUESTION: 16

In which scenario does gravity cause the change in the object's motion?

A truck coming to a stop after applying the brakes
A skydiver accelerating towards the ground after jumping from a plane
A book sliding across a table after being pushed by someone
A speed skater accelerating across the ice after the starting gun

Answer(s): B

Explanation:

Gravity is the force that accelerates a skydiver towards the ground after they jump from a plane. In this scenario, gravity causes a significant change in the motion of the skydiver, pulling them downward and increasing their velocity until air resistance balances the force of gravity.

Reference:

Integrated Physical Sciences, Chapter 3: Forces and Motion

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WGU Integrated Physical Sciences (MTC1) Integrated-Physical-Sciences Dumps in PDF

Free WGU Integrated-Physical-Sciences Real Questions (page: 9)

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