Get WGU Integrated Physical Sciences (MTC1) Exam Practice Questions - Real and Updated

Answer : A

In space, particles attract each other due to the force of gravity. This attraction increases as the particles' mass increases, leading to the accumulation of more matter.

Gravity is a fundamental force that causes objects with mass to be attracted to one another. As particles gather and grow in mass, their gravitational pull becomes stronger, allowing them to attract even more particles.

This process can lead to the formation of larger celestial bodies such as asteroids, comets, planets, or stars. Reference:

Integrated Physical Sciences resources on gravitational forces and celestial body formation.

Answer : B

1. **Understanding the Graph**: The graph provided shows the speed of a sound wave (in m/d) versus frequency (in Hz). The x-axis represents frequency, and the y-axis represents the speed of the sound wave. 2. **Observing the Trend**: The graph shows a series of data points that remain relatively constant across different frequencies. There is no visible trend or significant change in speed as the frequency varies. 3. **Sound Waves in a Medium**: In a given medium (such as air at constant temperature), the speed of sound is typically constant and does not depend on the frequency of the sound wave. 4. **Conclusion**: The graph indicates that there is no correlation between the speed of the sound wave and its frequency in the given medium. **Reference**: - Properties of Sound Waves: Sound wave propagation characteristics in a medium.

Answer : B

In the solid state of matter, particles are closest together. This is due to the fact that solids have a definite shape and volume, meaning the particles are tightly packed in a fixed, orderly arrangement. In comparison:

Liquids have particles that are close together but not in a fixed position, allowing them to flow.

Gases have particles that are far apart and move freely.

Plasma consists of ionized particles and is not typically considered in the context of ordinary matter states at standard conditions.

Integrated Physical Sciences Learning Resources, Chapter on States of Matter

Answer : B

As a coin sinks through the water in a wishing well, the velocity of the coin decreases due to the frictional force exerted by the water on the coin. This frictional force opposes the motion of the coin and slows it down. Reference:

Integrated Physical Sciences, Chapter 3: Forces and Motion

Answer : B, C

Commercial airline pilots primarily fly in the lower stratosphere and upper troposphere to avoid turbulence and ensure smooth flight conditions.

The troposphere is where weather phenomena and turbulence are common, so pilots seek stable conditions typically found at the boundary with the stratosphere.

The stratosphere offers stable atmospheric conditions, ideal for cruising altitudes. Reference:

Integrated Physical Sciences materials on atmospheric layers and aviation.