Answer:
Explanation:
The uplift caused a wide range of elevations and climates in the Sierra Nevada, which are reflected by the presence of five life zones (areas with similar plant and animal communities).
if a swimmer pushes off a pool wall with a force of 250n, what is her acceleration.
describe the shapes of a concave lens and a convex lens
Which star is closest to earth?
A. Polaris
B. the sun
C. the Milky Way
D. Sirius
The answer is "B. The Sun".
What word is used to describe an object that reflects 100% of the incident light?
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Both Transverse and Longitudinal Waves transmit _______ and not ______.
Both Transverse and Longitudinal Waves transmit in solids but only Longitudinal waves can transmit in fluids.
What are Transverse and Longitudinal waves?Longitudinal waves are defined as mechanical waves that require a medium for propagation while transverse waves are defined as non-mechanical waves that do not require a medium for propagation. Longitudinal waves have compressions and rarefactions, while transverse waves have crests and troughs.
Longitudinal waves can propagate in liquids but transverse waves cannot. Transverse waves propagate in the direction perpendicular to the medium but longitudinal waves propagate in the same direction with the medium. Both can transmit energy in a solid medium.
Thus, both Transverse and Longitudinal Waves transmit in solids but only Longitudinal waves can transmit in fluids.
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When sunlight strikes oil on the surface of water, a variety of colors are observed. What is the best explanation for this observation?
Kepler-186f is much closer to the sun than earth is to its sun. why is it considered to be in the habitable zone even though it’s close to a sun
Its sun is cooler than our sun, so there is a possibility that water can exist in liquid state on this planet.
Which of the following is responsible for the formation of sinkholes F. Eroding soil on Earths’s surface G. Ice that builds up on earths surface H. Deposition that has built up at the mouth of the river I. Flowing groundwater that dissolves rock , such as limestone
Sinkholes are commonly formed by acidic groundwater dissolving limestone or other susceptible rock types underground, leading to the collapse of the surface into cavities created by such erosion. The correct answer is I. Flowing groundwater that dissolves rock , such as limestone
The formation of sinkholes is typically the result of groundwater flowing through and dissolving rock formations, such as limestone. When acidic groundwater moves through these rocks, it slowly erodes them, creating underground cavities.
Over time, as the rock continues to dissolve and the cavities grow larger, the land surface above can no longer be supported and collapses, forming a sinkhole. This type of underground erosion is especially effective when the groundwater contains carbonic acid, which is particularly good at dissolving limestone.
Acidic groundwaters and their reaction with basic rock formations like limestone are key in the development of sinkholes. Collapse sinkholes can form abruptly and are often dangerous as they remove support for the surface suddenly. In contrast to other options like eroding soil, ice buildup, or deposition, it is the flowing groundwater that typically leads to these hazardous and sometimes massive geographical features.
Which of the following materials is a conductor of electric current? a wooden spoon,a plastic game piece,a glass window,a copper wire
its a copper penny hope this helps
Explain what happens to the pitch of a cell phone ringing when the amplitude of a sound wave increases.
the pitch of the cell phone ringing will remains same when the amplitude of a sound wave increases.
The pitch of a sound wave depends on its frequency. more frequency means higher pitch and less frequency means lower pitch. The amplitude of wave is the maximum displacement of the particles of the medium from their mean positions. Increase in amplitude will increase the loudness and not the pitch. So the pitch remains same as the amplitude of sound wave is increased.
The picture below shows the positions of the Earth, Moon, and Sun during an eclipse.
What is true of the eclipse shown in the picture?
A) It is a solar eclipse, in which the Moon casts a shadow on the Earth.
B) It is a lunar eclipse, in which the Moon casts a shadow on the Earth.
C) It is a lunar eclipse, in which the Earth casts a shadow on the Moon.
D) It is a solar eclipse, in which the Earth casts a shadow on the Moon.
The role of plants in the water, oxygen, nitrogen, and carbon cycles
Plants play a crucial role in the water, oxygen, nitrogen, and carbon cycles. In water Cycle they absorb water through transpiration.
Plants absorb water from the soil through their roots and release it into the atmosphere through a process called transpiration. This helps to regulate the amount of water in the atmosphere, which is essential for weather patterns and the water cycle.
Oxygen Cycle: Plants are the primary producers of oxygen through the process of photosynthesis.
They absorb nitrogen from the soil through their roots and use it to build proteins and other essential compounds.
carbon cycle :During photosynthesis, plants absorb carbon dioxide from the atmosphere and use it to build organic compounds such as sugars, starches, and cellulose.
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Is energy transformation only occurring at only point 3?
Final answer:
Energy transformation involves various types such as kinetic to potential energy, work to kinetic energy, and is influenced by the parameters of the system, including quantum mechanical constraints and relativistic observations. It can occur at different points, not just one.
Explanation:
Energy transformation in a physical system does not occur exclusively at one particular point unless specified by the conditions or constraints of that system. Different types of energy transformation include the conversion of kinetic energy to potential energy and vice versa, as well as the transformation of work into kinetic energy.
The details provided reference various energy concepts in physics, such as the transformation involved when light from the Sun shines on Earth, and energy conservation as applied to multiple dimensions.
In the realm of quantum mechanics, like the one described by 'equation (3.24)' and determining when one or three energy levels might exist, it typically involves solving the equation with the given parameters 'p' to find the allowed energy states. Alterations to the parameter 'p' could result in different energy states, hence affecting the number of observable energy levels.
Understanding the relationship between energy conservation and the direction of velocity is key when dealing with multidimensional problems.
Additionally, the example of Betty and Alice helps illustrate the relativistic effects on energy when observing a system from different reference frames, underlying the complexity involved when addressing conservation of energy in relativistic contexts.
The fourth step in the scientific method is
Final answer:
The fourth step in the scientific method is to accept or modify the hypothesis, dependent on whether the experimental data supports or contradicts it.
Explanation:
The fourth step in the scientific method is to accept or modify the hypothesis. After conducting experiments designed to test the hypothesis, a scientist must analyze the data collected. If the data supports the original hypothesis, it can be accepted and the scientist can proceed to the next step. However, if the data does not support the hypothesis, it may either be rejected or modified, often leading to further experimentation. This critical step ensures that scientific theories are continually refined and improved based on empirical evidence.
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Answer 1) For calculating ΔU;
We can use the expression for the first law of thermodynamics which is,
ΔU = Q + W
Where ΔU is the Change in internal energy, Q is heat added to the system and W is the work done on the system.
As, Q = + 51 KJ and W = -15 KJ.
So, ΔU = 51 -15 = 36 KJ.
Hence, ΔU = 36 KJ
Answer 2) Using the same first law of thermodynamic equation for calculating ΔU (Internal Energy o the system) ;
ΔU = Q + W;
Given, Q = + 100 KJ and W = - 65 KJ
On substituting the values in the above equation we get,
ΔU = 100 - 65 = 35 KJ
Therefore, ΔU = 35 KJ
Answer 3) Using the same first law of thermodynamic equation for calculating ΔU (Internal Energy o the system) ;
ΔU = Q + W;
Given here, Q = - 65 KJ and W = - 20 KJ
On substituting the above values in the equation we get,
ΔU = -65 -20 = - 85 KJ
Therefore, ΔU = - 85 KJ for this system.
Answer 4) According to the answers in 1), 2) and 3) it can be seen that there has been change in the internal energies of the system for all, but some are positive changes and some are negative.
As per the definition of the internal energy, when the system does work on its surroundings, energy is found to be lost, and E is observed to be negative; and when the surroundings do work on the system, the internal energy of the system becomes larger, converting E into positive.
So, it is clear that in case 3) the system did work on the surroundings as E value is found to be negative, rest have positive E values.
work transfers what between objects
Answer:
Energy
Explanation:
The answe is "work transfers energy between objects".
There are different types of energy. Work is one of them and is a type of energy in transit.
So work is energy that is exchanged between objects or systems.
When work is done energy is tranferred by mechanical means (if the means are not mechanicals, the type of energy transferred is called heat), for example when pushing a box, energy is transferred to it so that it can move.
What two simple machines make up a screw?
Which of the following reflect the ideas of Manifest Destiny?
Select all that apply.
which object has the most gravitational potential energy
a. a 15 kg at a height of 0.5
b 10 kg at a height of 0.5
c a 10 kg at a height of 0.8
d a 15 kg at aheight of 0.8
The correct option is d.
The object with the most gravitational potential energy is 15 kg mass at a height of 0.8 meters.
To determine which object has the most gravitational potential energy, we'll use the formula for gravitational potential energy:
[tex]\[ U = mgh \][/tex]
Where:
- [tex]\( U \)[/tex] is the gravitational potential energy,
- [tex]\( m \)[/tex] is the mass of the object,
- [tex]\( g \)[/tex] is the acceleration due to gravity (approximately [tex]\( 9.8 \, \text{m/s}^2 \)[/tex]),
- [tex]\( h \)[/tex] is the height of the object above the reference point (in meters).
Now, let's calculate the gravitational potential energy for each object:
a. [tex]\( U_a = (15 \, \text{kg}) \times (9.8 \, \text{m/s}^2) \times (0.5 \, \text{m}) = 73.5 \, \text{J} \)[/tex]
b. [tex]\( U_b = (10 \, \text{kg}) \times (9.8 \, \text{m/s}^2) \times (0.5 \, \text{m}) = 49 \, \text{J} \)[/tex]
c. [tex]\( U_c = (10 \, \text{kg}) \times (9.8 \, \text{m/s}^2) \times (0.8 \, \text{m}) = 78.4 \, \text{J} \)[/tex]
d. [tex]\( U_d = (15 \, \text{kg}) \times (9.8 \, \text{m/s}^2) \times (0.8 \, \text{m}) = 117.6 \, \text{J} \)[/tex]
Comparing the results, the object with the most gravitational potential energy is 15 kg object at a height of 0.8 meters, with a gravitational potential energy of 117.6 J.
if an atom has 3 electrons and 3 protons, what is the charge on the atom
Jonathan has six strings that are the same thickness and are all the same material. He cuts the strings to different lengths and pulls so that they all have the same tightness. Which string will have the highest pitch when he plucks it with his finger?
Your answer is C.
The shortest string will have the highest pitch. This is because the pitch of a sound depends on the speed of its vibrations.
What is the difference between a constellation and an “asterism”? Name at least one commonly known asterism.
A constellation is a sector into which the sky is divided, while an asterism is a noticeable star pattern within a constellation. The Big Dipper is a commonly known asterism within the constellation of Ursa Major.
Explanation:A constellation is one of the 88 sectors into which the sky is divided. Each point in the sky falls within a specific constellation. On the other hand, an asterism is an especially noticeable star pattern within a constellation. The Big Dipper, which is an asterism within the constellation of Ursa Major, is a commonly known example.
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If the earth’s gravity were much less powerful our atmosphere would be similar to
Frequency is the number of oscillations (or cycles) per
1)Minute
2)hour
3)day
4)second
what is the diurnal motion of the stars
Explain how convections currents cause Earth’s plates to move continuously
if a glacier is in equilibrium, where ablation is equal to the accumulation, what occurs in the terminus or 'snout'
If a glacier is in equilibrium, its terminus remains stable as ice loss from ablation equals ice gain from accumulation. The glacier's terminus does not advance or retreat under these conditions.
If a glacier is in equilibrium, it means that the ablation (loss of ice) is equal to the accumulation (gain of ice). The point where this balance is achieved is the equilibrium line. If the glacier is in equilibrium, the terminus or 'snout' of the glacier remains at a stable position. While the ice continues to flow downslope, the position of the terminus does not advance or retreat because the amount of ice being lost to ablation is equal to the amount being gained through accumulation.
which has a higher acceleration:a 10kg object acted upon with a net force of 20N or an 18kg object acted on by a net force of 20N
Explanation:
The expression of the applied force in terms of mass and acceleration by using Newton's second law is as follows;
F= ma
Here, m is the mass of the object and a is the acceleration of the object.
Calculate the acceleration of a 10 kg object acted upon with net force of 20 N in the above expression.
Put m= 10 kg and F= 20 N in the above expression.
20= (10)a
a= 2 m/s^2
Calculate the acceleration of a 18 kg object acted upon with net force of 20 N in the above expression.
Put m= 18 kg and F= 20 N.
20= (18)a
a= 1.11 m/s^2
Therefore, the acceleration of a 10 kg object acted upon with net force of 20 N is greater than the acceleration of a 18 kg object acted upon with net force of 20 N.
If a forklift raises a 76-kg load a distance of 2.5 m, about how much work has it done?
Final answer:
To calculate the work done by the forklift, we need to find the force exerted by the forklift and multiply it by the distance it raises the load. The force exerted by the forklift can be found using the formula Force = mass x gravity. The work done by the forklift is approximately 1864 Joules.
Explanation:
To calculate the work done by the forklift, we can use the formula:
Work = Force x Distance
First, we need to find the force exerted by the forklift. Since the load has a mass of 76 kg, we can use the formula:
Force = mass x gravity
where gravity is approximately 9.8 m/s^2 (acceleration due to gravity). So, the force exerted by the forklift is:
Force = 76 kg x 9.8 m/s^2 = 745.6 N
Now, we can calculate the work done by the forklift:
Work = 745.6 N x 2.5 m = 1864 J
Therefore, the forklift has done approximately 1864 Joules of work.
You perform 556 J of work lifting a box to a height of 1.3m. How much force did you use to lift the box?
Answer:
The work is given 556 J. Here work is performed horizontally so your distance d=1.3 m
W=F.d
F=W/d =556/1.3 = 427.69 N
Explanation:
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Which of the following statements is true?
A.Plants don't use respiration to create energy.
B.Animals create energy using photosynthesis.
C.The atmosphere provides plants with carbon dioxide for photosynthesis.
D.The atmosphere provides animals with carbon dioxide for respiration.
Answer:
the other guy is incorrect because animals don't need carbon dioxide for respiration, they breathe in oxygen like us. all of them are incorrect except A.
Answer:
a
Explanation:
Because it is in bae which is breath and exhale