what is friction. what does friction do as an ice skater slide across the ice?

Final answer:

It would take approximately 109.59 years for the glacier moving at a rate of 2 meters per day to reach the village that is 80 kilometers away.

Explanation:

The student asked how many years it would take for a glacier moving at a rate of 2 meters per day to cover the distance to a village that is currently 80 kilometers away. To solve this problem, we need to first convert the distance from kilometers to meters. Since 1 kilometer equals 1,000 meters, the distance in meters is 80 km × 1,000 = 80,000 meters.

Next, we calculate the number of days it would take to travel this distance by dividing the total distance by the daily movement rate of the glacier. The calculation would be 80,000 meters ÷ 2 meters/day = 40,000 days.

Finally, to find the number of years, we divide the number of days by the number of days in a year. This is 40,000 days ÷ (1 year/365 days) = 109.59 years. So, it would take approximately 109.59 years for the glacier to reach the village at the current rate of movement.

As waves pass through a rope, the rope's particles move up and down in a transverse wave pattern, while the wave energy travels horizontally along the rope's length.

When waves pass along a rope, the motion of the rope can be described as a transverse wave. Each particle (or atom) within the rope moves in a direction perpendicular to the wave's direction of travel, generally up and down.

As a wave travels from one end of the rope to the other, the particles of the rope move up and down but their horizontal position doesn't carry along with the wave. Instead, it is the wave's energy that moves along the rope.

Imagine tying a ribbon to the middle of the rope. As the wave passes through that point, the ribbon will move vertically (up and down), illustrating the motion of a single particle within the rope.

The wave itself travels horizontally along the length of the rope. This is similar to the movement observed when wind creates waves on water. Particles of water move in circular orbits; however, in the case of a rope, the particles simply move up and down.

The direction of the pulses, or waves, is from the point where the wave is initiated to the other end of the rope. If an observer were to generate a wave by quickly flicking one end of the rope, they would see a series of peaks and troughs traveling away from them along the rope. This represents the energy being transferred through the medium, in this case, the rope.

Answer:

Because of the deposits.

Explanation:

One of the reasons why rocks layers are not horizontal is because of the deposits and kinds of the walls that are next of the deposits

They are not necessarily always parallel. They have a natural inclination delimited by the walls.

This is determined by the age of the strata; the youngest deposits are taking the form of the oldest deposit.

However, part of the unique factors that determine the deposits (shape and alignment) of the layers are the organisms that lived and, therefore, could be fossilized. These factors are not repeatable since they are organisms that will not exist again.

Fossils are an essential part of the Earth's layers, as they help study the stages and shapes of the layers.

There is also another factor when magma is introduced in the form of a fault line and crystallizes in the middle of the Earth's layers. modifying the sequence of the affected rocks, becoming a young layer (not horizontal, due to its penetration into the layers of the Earth).

A. Divide the change in the objects velocity by the time it takes to make that change.

Explanation:

Acceleration is a vector quantity whose magnitude is given by the following equation:

[tex]a=\frac{\Delta v}{\Delta t}[/tex]

where

[tex]\Delta v[/tex] is the change in velocity of the object

[tex]\Delta t[/tex] is the time it took to make the change in velocity

Therefore, we see that this equation corresponds to choice A.

Explanation:          

Location A receives 200cm of rain each year, while Location B receives only 30cm because in location A cloud rises, and it expands and cools down because the surrounding atmospheric pressure decreases, then the cloud gets too large and falls down as rain. Whether in location B, this land is covered by rain shadow and receives less rain.

Once the rain passes from mountain range and it moves down to the other side, warms and dries out. This produces a rain shadow. The land which is covered by rain shadow is very dry and receives less rain. Precipitation and cloud cover the land on windward side of the mountain range.  

Answer: W = 150J

Explanation: The work is defined as a measure of energy transfer when an object is moved by an external force.

So if we are applying a force of 25N for 6 meters, the work is done can be calculated as:

W = F*D where F is a force, and D is distance.

W = 25N*6m = 150 N*m

And Newton*meter = joule, so we have that:

W = 150J

The topography and climate of an area, particularly wind and temperature, are the key factors determining how quickly a coastline is subject to erosion.

The two main factors that affect how quickly a coastline erodes are topography and climate.

The term 'topography' refers to the arrangement of the natural and artificial physical features of an area, and these physical features, or 'lay of the land', can influence erosion. For example, water runoff can strip away land material, leading to erosion, and steep areas are more prone to erosion than flat or leveled terrains.

On the other hand, the climate of a location, or more specifically wind and temperature, has a significant effect on coastline erosion. Areas characterized by high winds or rapid temperature changes can experience faster erosion due to increased rates of evaporation, transpiration, and disruptions in ocean currents triggered by wind or temperature variance.

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This question is incomplete. Here is the complete question:

1. Why can certain stars sometimes be identified as eclipsing binary stars?

A. They are brighter than any single star

B. They are all white dwarfs

C. They become dimmer at regular intervals

D. They are cool red stars

Answer:

The correct answer is option C. They become dimmer at regular intervals .

Explanation:

Eclipsing binary stars are those that we can see as a point of light, but in reality they are two stars that orbit one close to the other.

When one star passes in front of the other, the observer can see how the intensity of the brightness varies. Algol is the best known eclipsing binary star and has an eclipse interval of 173 hours (2.9 days).

These stars orbit an eclipsing binary star system, where one star outshines another.

Answer:

 The gaps in the rock are known as discontinuities that are basically caused by erosion. The unconformities in the rock is mainly caused by the erosion that represent the irregular line on the surface of the rock. The layer of each rock create a gap between the upper and the lower layer.  

Sometimes, the process of the over thrust can cause the gap on the surface of the rocks as the layer of the rock are set one over the another in the geological rock records.

Answer:

Weight of the cannonball, W = 196 N

Explanation:

Mass of the cannonball, m = 20 kg

We need to find its weight on earth. The weight of an object on the earth can be calculated by the product of mass and acceleration due to gravity as :

[tex]W=m\times g[/tex]

[tex]W=20\times 9.8[/tex]

W = 196 N

So, the weight of the cannonball on the Earth's surface is 196 N. Hence, this is the required solution.

The name of the large pore through which filtered water leaves the body of the sponge is osculum. The correct option is C.

Sponges, members of the phylum Porifera, are a basal animal clade and the diploblasts' sister.

They are multicellular organisms with pores and channels that allow water to circulate through their bodies, which are made up of jelly-like mesophyll sandwiched between two thin layers of cells.

To obtain energy, animals require nutrients from other animals and plants. Because sea sponges lack chloroplasts and do not generate energy from sunlight, they are classified as animals.

Water is pumped directly into the sponge through pores called ostia and then out through an opening called the osculum.

The spongocoel is lined with choanocytes, which are specialized digestive cells that filter and absorb food.

Thus, the correct option is C.

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The process involving heat transfer did Roseanne observe inside the beaker is known as convection.

The process of convection involves the movement of heated fluid, including air or water, in order to transfer heat.

Natural convection is caused by the fact that most fluids have a tendency to expand when heated, which causes them to become less thick and rise due to increased buoyancy.

The consistent heating of air inside a heated room or water in such a kettle is due to circulation generated by this effect: heated molecules widen the space that it move in by moving faster toward one another, raise, and thereafter cool and close again, increasing density and causing a consequent sinking.

Forced convection refers to the movement of fluid by means other than those brought on by changes in density with temperature.

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Roseanne observed convection, where heat is transferred through the liquid in the beaker, causing hot liquid to rise and cool liquid to sink, which forms a circulation pattern. This process continues with the presence of a heat source.

Roseanne observed the process of convection inside the beaker during her laboratory experiment involving heat transfer. In this process, the heat transferred to the solution causes the hotter, less dense liquid to rise, while the cooler, denser liquid sinks. This creates a circulation pattern within the beaker as the warmer part of the solution expands and rises, transferring heat to other regions, and the cooler part of the solution descends. This circulation due to convection continues as long as there is a heat source to maintain the temperature difference.

Common examples of convection in daily life include a barista steaming milk to make hot cocoa, or the natural circulation patterns observed in the atmosphere due to the heating of the Earth's surface by the sun. It is one of the three methods of heat transfer, which also include conduction and radiation.