PHYSICS HIGH SCHOOL

What happens to the gravitational force between two objects when their distance is changed?

Answers

Answer 1
Answer: If they become closer, it is increased, and if the objects become farther away is decreased.

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Ocean waves contain energy that is transferred to them by ______ moving across the surface.a. wind
b. sunlight

Answers

Answer

a. wind

Explanation

Ocean waves are coursed by wind which transfers its energy into the water. This forms big waves that can travel a long distance. The size of the wave depend on the speed of wind, the area covered and the duration of the wind.

Answer:

Wind

Explanation:

PLEASE HELP ME Filtering occurs when __________. some light is absorbed and some light is transmitted all light transmitted all light is absorbed light reflects off a surface

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Filtering of light is a process of selectively transmitting light of different wavelengths. The devices that are used to carry out this process are called optical filters for example, a plabe class or plastic devices. The answer hence to this problem is A. 

A light plane is headed due south with a speed relative to still air of 185 km/h. After 1 h, the pilot notices that they have covered only 135 km and their direction is not south but 75˚ south of east. What is the wind velocity?

Answers

Use the cosine rule to solve for the distance the wind pushed them to the east and because this all happened in an hour, you can say they travelled this distance per hour.

+-130 km due east which means the wind speed was +-130km/h.

So for example i used a^2=b^2+c^2-2bc(cos75) b will be the distance they travelled and c= 135cos75=35km now all you do is substitute in and you will get your distance that the wind pushed them to the east and because it was an hour of travel the distance as said before will be per hour. 

Final answer:

The wind velocity can be calculated by vector subtraction of the plane's velocity relative to the ground (the observed travel path) and the plane's velocity relative to still air. This involves converting the velocities to their component forms along the east-west and north-south axes, performing the subtraction, and then converting back to a magnitude and direction.

Explanation:

This problem can be solved through the use of vector addition and subtraction. Let's denote the velocity of the plane as Vp, the velocity of the wind as Vw, and the resultant velocity (or the actual observed travel path) as Vr. These velocities are vectors, which mean they have both magnitude and direction.

Given that the plane had an airspeed of 185 km/h due south, which can be represented as Vp=185 km/h south. However, the actual path covered was Vr=135 km/h, 75° south of east. We can find Vw through the equation Vr = Vp + Vw, rearranged as Vw = Vr - Vp.

Following this calculation, we then need to convert these vector magnitudes and directions into components along the north-south and east-west axes. We then subtract corresponding components to find the wind velocity in terms of its north-south and east-west components, before finally converting these back into a magnitude and direction using Pythagoras' theorem and trigonometric functions.

Learn more about Physics of Wind Velocity here:

brainly.com/question/24253179

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a friend tells you that his family always complains about the noise when he practices his electric guitar in his room. write at least three recommendations for how our friend might reduce the sound that escapes from his room. why do these changes to the room help reduce noise?

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