Part A: The statement "The magnitude of the buoyant force is equal to the weight of the fluid displaced by the object" is true only for an object that is floating.
This is because, when an object is floating, it is in equilibrium with the fluid; the buoyant force acting on the object is equal to the weight of the fluid it displaces, which is also equal to the weight of the object. This means that the buoyant force is equal to the weight of the object.
Part B: The statement "The magnitude of the buoyant force is equal to the weight of the amount of fluid that has the same volume as the object" is true for an object that is partially submerged in a fluid.
This is because, when an object is partially submerged, the buoyant force acting on it is equal to the weight of the amount of fluid that has the same volume as the object. Since the buoyant force is equal to the weight of the object, this statement is true.
Part C: The statement “The magnitude of the buoyant force equals the weight of the object" is false for any object partially or completely submerged in a fluid.
This is because the buoyant force acting on the object is not equal to its weight; rather, the buoyant force acting on the object is equal to the weight of the fluid it displaces, which is less than the weight of the object. Therefore, this statement is false.
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Complete question:
G an object is placed in a fluid and then released. assume that the object either floats to the surface (settling so that the object is partly above and partly below the fluid surface) or sinks to the bottom. (note that for parts a through d, you should assume that the object has settled in equilibrium.)
Part A Consider the following statement The magnitude of the buoyant force is equal to the weight of fluid displaced by the object Under what circumstances is this statement true? Hints O for every object submerged partially or completely in a fluid
O only for an object that is floating
O only for an object that is fully submerged and is sinking
O for no object submerged in a fluid
Part B Consider the following statement The magnitude of the buoyant force is equal to the weight of the amount of fluid that has the same al volume as the object. Under what circumstances is this statement true? Hints
O for an object that is partially submerged in a fluid
O only for an object is floating
O for an object completely submerged in a fluid
O for no object partially or completely submerged in a fluid
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Part C Consider the following statement The magnitude of the buoyant force equals the weight of the object. Under what circumstances is this statement true?
O for an object that is partially submerged in a fluid
O only for an object is floating
O for an object completely submerged in a fluid
O for no object partially or completely submerged in a fluid
which of these is a risk of speeding? a. Tire Damage b.Greater likelihood of being distracted c.longer barking distance d.mechanical failure
All of the above are risks of speeding.
Speeding is a type of aggressive driving behavior. Speeding is more than just breaking the law. The consequences are far-ranging:
Greater potential for loss of vehicle control;Reduced effectiveness of occupant protection equipment;Increased stopping distance after the driver perceives a danger;Increased degree of crash severity leading to more severe injuries;Economic implications of a speed-related crash; andIncreased fuel consumption/cost.Speed also affects your safety even when you are driving at the speed limit but too fast for road conditions, such as during bad weather, when a road is under repair, or in an area at night that isn’t well lit.
Speeding endangers not only the life of the speeder, but all of the people on the road around them, including law enforcement officers. It is a problem we all need to help solve.
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A man runs 300 m west in 60 seconds. He then runs 100m north-west in 20 seconds. What is his average velocity in meter per second?
Man moves at an average velocity of 5 meters per second.
What is his average velocity?A man runs 300 m west in 60 seconds. He then runs 100m north-west in 20 seconds. Average velocity is determined by dividing your displacement (a vector pointing from your initial location to your end position) by the total time, whereas average speed is determined by dividing the whole distance you went by the total time.We divide the total distance traveled by the total time taken by an object to determine its average speed.Man has traveled a total of 400 meters (300 + 100).
Total time required by man: 60 + 20 = 80 seconds.
average velocity is 400/80 = 5
Therefore, the average velocity of a man is 5 meters per second.
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the radius of mars is approximately one half the radius of earth, and the mass of mars is approxamitely one-tenth that of Earth
The radius of mars is approximately the mean distance between the number of sick days taken and the mean number of sick days taken by all employees
What is radius of mars?
Only Mercury is smaller than Mars, which is the fourth planet from the Sun and the second-smallest planet in the Solar System. Mars is the name of the Roman god of war that appears in the English language.
On average, Mars has a temperature of -81 degrees Fahrenheit. The polar regions have winters with temperatures around -220 degrees Fahrenheit, while summers at lower latitudes average 70 degrees Fahrenheit.
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In which graph is acceleration the slope?
A. Distance versus time
B. Acceleration versus time
C. Velocity versus time
D. Position Versus time
The graph of the slope's acceleration depicts velocity vs time.
reveals the solution.
The distance an object has travelled over time is displayed on a distance-time graph.
A straight-line graph of the time versus distance results is shown. The Y-axis displays the distance. The X-axis displays a time plot. Velocity changes occur more quickly on the graph with the sharpest slope.
It picks up speed the fastest. The acceleration of an item is shown by the slope of a velocity graph. As a result, the value of the slope at a particular time determines the item's acceleration at that specific instant.
A moving item is shown by a sloped line on a distance-time graph. The object's speed is equal to the gradient or slope of the line on a distance-time graph.
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given below is stream flow data due to a storm of two hour duration. the area of the drainage basin is 2000 acre. determine the total volume of direct runoff (in inch). use the constant discharge method to separate the base flow. plot the hydrograph (5 points).
The minimum streamflow immediately prior to the rising limb is used as the constant value.
Here the constant value is taken as 25cfs which is at 2nd hour just before the rise of hydrograph.
The direct runoff discharge starts from 2nd hour and ends at 36th hour.
from the trapezoidal formula, The runoff discharge = (0+72+173+295+419+510+559+495+397+266+167+110+7 2+47+27+19+12+(8/2)) * 2 * 3600 = 26236800 cubic feet. The area of the catchment = 2000 acres. = 2000* 43560 =87120000 ft^2
The depth of runoff (discharge / area) = 0.266 feet = 0.266* 12 inches 3.2 inches.
Stream flow or channel outflow is the flow of water in streams and other channels and is a major component of the hydrological cycle. This is one component of water movement from land to water, and another component is surface runoff. The water flowing through the channel comes from surface runoff from adjacent hillsides, groundwater flowing from the ground, and water drained from pipes. The flow rate of water flowing through a canal can be measured with a hydrometer or estimated using Manning's equation. A record of flow over time is called a hydrograph. Flooding occurs when the volume of water exceeds the capacity of the canal.
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vexplain the differences between refraction diffraction, and interference. are there any situations where more than one of those are happening at the same time? in which of these situations does the speed of a wave change? what about the wavelength? and the frequency? provide as detailed a description as possible to show that you have mastered the differences between these three processes
Refraction is when light travels from one medium to another
This is studied by considering the light as ray.
Here as the ray travels from one medium to another, its speed changes.
However, the frequency of the waves which depend on the source will not change in the other medium as well. So frequency does not change in refraction. But wavelength changes when light undergoes refraction.
Interference and Diffraction are studied treating light as wave. And both of these are basically superposition of waves
In interference, light from two coherent sources interfere with each other and the resulting wave pattern is the subject of interference.
While in diffraction, secondary wavelets emerging from the original wave's different parts is considered. The supersposition of these secondary wavelets is basically diffraction.
In both of these interference and diffraction, speed, wavelength and frequency all remains same as the speed and therefore wavelength depends only on the medium
Reflection involves the change in direction of a wave as it bounces off a barrier. Wave refraction involves the change in direction of a wave as it passes from one medium to another. Diffraction involves the change of direction of a wave as it passes around an opening or barrier in its path.
Reflection is the process of reflecting light when it hits an in-plane medium. Refraction is the process of changing the path and bending light as it passes through a material. Hence, this is the main difference between reflection and refraction.
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FILL IN THE BLANK. The wind is moving from a rough to a smooth surface; at the same height wind over the smooth surface gets with fetch. a) faster b) slower c) None of the above
Option A, The wind is moving from a rough to a smooth surface; at the same height wind over the smooth surface gets faster with fetch.
The wind can move more quickly over a smooth surface as compared to a rough one at the same height. This is known as fetch. The exchange of momentum between the atmosphere and the ocean is facilitated by surface winds, which generate ocean waves and drive ocean circulation.
This circulation transports heat and carbon around the globe. As the roughness of the surface increases, the wind speed at the surface decreases. However, when the roughness length is shorter, there is less exchange between the surface and the atmosphere but the winds near the surface become stronger.
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