Identify each wave interaction based on how it changes direction. The wave changes direction as it bends and scatters. _______

The wave changes direction as it changes its speed. _______

The wave changes direction at an angle equal to the angle of incidence. ________
diffraction
reflection
refraction

PLEASE HELP!!

Final answer:

Following directions in an experiment is crucial for accurately studying the effect of a variable, obtaining valid and repeatable results, and ensuring safety. It is integral to the scientific method, which involves making observations, forming a hypothesis, conducting an experiment, and analyzing results.

Explanation:

It's critical to follow all directions in an experiment correctly for several causes. First, experiments are a part of the scientific method, a process for investigating phenomena and acquiring new knowledge, or correcting and integrating existing knowledge. This method includes making observations, forming a hypothesis, conducting an experiment to test the hypothesis, and analyzing the results to reach a conclusion.

Second, correctly implementing the experimental procedure is necessary to measure the effect accurately and eliminate any lurking variables. It also involves control and experimental groups, which need to be treated differently only in the variable that's being tested. This way, any difference in results is attributed to that variable. Repeating the process under the same conditions confirms that your results were not accidental.

Finally, not following directions can lead to invalid results, incorrect conclusions, and even potential risks and hazards, particularly in certain fields such as chemistry or medicine. Therefore, meticulousness in adhering to instructions is essential for the reliability and safety of the experiment.

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In order to have a volume of 216 ml, the methane have to be compressed at a pressure of 1509 kPa.

Explanation:

This problem is solved by using Boyle's law which states that at constant temperature pressure of a gas is inversely proportional to its volume. It describes how the pressure of a gas increases with a decrease in the volume of a container. The formula is given as,

                                        P1 V1 = P2 V2

where P1 and V1 are first pressure and volume,

           P2 and V2 are second pressure and volume.

Given P1 = 503 kPa,            V1 = 648 ml,  and     V2 = 216 ml

                  P2 = (P1 V1 ) / V2 = (503 648) / 216

                  P2 = 1509 kPa.

Answer:  

1. law of universal gravitation -"The box of cotton is much easier to lift than the box of books."  

2. 1st law of motion (law of inertia) - "My coffee spilled all over because you slammed on your brakes!"  

3. 2nd law of motion -  "I can't hit the ball farther than you because you're stronger than I am."  

4. 3rd law of motion - "That bat hurt my hands when I hit the ball!"  

Explanation:  

Law of gravitation states that there exists an attractive force between two objects having mass. The magnitude of the force depends upon the masses of the two objects and inversely proportional to the distance between them. Thus, greater the mass, greater would be the force. weight of an object is determines the gravitation pull of the Earth on the mass of the object. Thus, it is easier to lift a box of cotton which is lighter in weight than a box of books.  

Newton's first law states that an object remains in state of rest or motion unless exerted by an unbalanced external force. Thus, when you are sitting in the car and the driver applies break suddenly, you experience a pull force because you continue to move forward while the car suddenly decelerates and if you would be holding coffee, it can spill.  

Second law of motion states that force is rate of change of momentum. Momentum depends on the mass and velocity of the object. Greater the mass, greater would be momentum. Thus, A person who is stronger would be able to hit the ball harder and hence faster than the other.  

Third law of motion states that, for every action, there is equal and opposite reaction. Thus, when when you a ball with the bat, you are applying force with your hands. Hence, your hands would also experience an equal amount of force in the opposite direction and you would get hurt.