A copper water tank of mass 20kg contains 150 kg
A 0.05-kg car starts from rest at a height of 0.95 m. Assuming no friction, what is the kinetic energy of the car when it reaches the bottom of the hill? (Assume g = 9.81 m/s2.)
A. 0.466 J
B. 0.308 J
C. 4.317 J
D. 0.0475 J
The kinetic energy of the car when it reaches the bottom of the hill is about A. 0.466 J
[tex]\texttt{ }[/tex]
Further explanationLet's recall Kinetic Energy Formula as follows:
[tex]\large {\boxed{Ek = \frac{1}{2}mv^2} }[/tex]
Ek = Kinetic Energy ( Joule )
m = mass of the object ( kg )
v = speed of the object ( m/s )
Let us now tackle the problem !
[tex]\texttt{ }[/tex]
Given:
mass of the car = m = 0.05 kg
initial speed of toy car = u = 0 m/s
initial height position of the car = h₁ = 0.95 m
final height position of the car = h₂ = 0 m
gravitational acceleration = g = 9.81 m/s²
Asked:
final kinetic energy of the car = Ek₂ = ?
Solution:
We will use Conservation of Energy to solve this problem:
[tex]Ep_1 + Ek_1 = Ep_2 + Ek_2[/tex]
[tex]mgh_1 + \frac{1}{2} m u^2 = mgh_2 + Ek_2[/tex]
[tex]mgh_1 + \frac{1}{2} m (0)^2 = mg(0) + Ek_2[/tex]
[tex]mgh_1 = Ek_2[/tex]
[tex]Ek_2 = 0.05 \times 9.81 \times 0.95[/tex]
[tex]Ek_2 \approx 0.466 \texttt{ J}[/tex]
[tex]\texttt{ }[/tex]
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Answer detailsGrade: High School
Subject: Physics
Chapter: Energy
When the two plates move away from eachother what's faults are created
calculate the speed of a car in miles per hour that is flashed on a speed camera covering a 20m distance in 0.5 seconds.
Describes what happens to the amplitude of a wave as it moves away from its source and why this occurs.
Final answer:
The amplitude of a wave decreases as it moves away from its source because the wave's energy is distributed over a greater area. The amplitude's reduction is exponential, with a constant fractional decrease over each unit of distance, but the speed of the wave remains constant.
Explanation:
As a wave moves away from its source, its amplitude typically decreases. This occurs because the energy of the wave is spread over a larger area as it propagates. It is important to note that the amplitude of a wave does not depend on its frequency or speed, but rather on the energy it carries. In the case of a spherical wave, the amplitude decreases because the energy must be shared among more particles in the outer, larger shells of the wavefront, leading to each particle having less energy and thus reducing the amplitude.
Furthermore, the reduction in the amplitude of a wave that undergoes absorption is exponential according to the principle of superposition. This means that for each unit of distance the wave travels, the amplitude decreases by a constant fraction. However, this reduction in energy does not imply that the wave slows down; the speed of the wave remains constant unless the medium through which it is traveling changes.
What happens when aluminum fills its valence shell?
A. Three electrons are lost, creating Al ^ +3
B. Three electrons are gained, creating Al ^ -3
C. Three electrons are gained, creating Al ^ +3
D. Three electrons are lost, creating Al ^ -3
Answer:
Correct answer is B. Three electrons are gained, creating Al ^ -3
Explanation:
Aluminum in its valence shell has 3 electrons, this shell can have a maximun of 6 electrons. Then, to fill its valence shell, 3 electrons must be gained, and then the valence shell would have 6 electrons and would be complete.
If 3 electrons are gained, then Aluminum, would have a charge of -3, since each electron gained gives negative charge to the atom.
Al^ -3 is a ion of aluminum with charge -3.
During adverse weather conditions such as rain or fog, drivers should take action accordingly by turning on their headlights, slowing down and increasing
In adverse weather conditions, drivers should turn on headlights, slow down, and increase their following distance to enhance road safety.
Explanation:During adverse weather conditions such as rain or fog, drivers should indeed respond by adapting their behavior to maintain safety. The first action to be taken is to turn on the car's headlights. This helps other vehicles and pedestrians on the road see you. Secondly, one should slow down. Reduced visibility means that hazards may not be perceived until they are closer, and the wet road conditions may increase stopping distance. Finally, the driver should increase the following distance. This gives you more time to react if the car in front stops suddenly. These three actions can greatly enhance road safety in adverse weather conditions.
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Small college has 2523 students in 1994 and 2891 students in 1996 if the enrollment follows a linear growth pattern how many students should the college have in 2006?
Will adding soap to water affect how many drops of water will fit on a penny?
Please help!
Final answer:
Adding soap to water decreases its surface tension due to the interaction between soap molecules and water, resulting in fewer drops of water fitting on a penny.
Explanation:
Yes, adding soap to water will affect how many drops of water will fit on a penny. This is because soap reduces the surface tension of water. Normally, water has a high surface tension due to the polar nature of water molecules, which allows it to pile up in drops. However, when soap is added, the soap molecules disrupt the water's cohesive forces by inserting themselves between water molecules.
The ionic-salt end of the soap molecule dissolves in water, while the non-polar hydrocarbon tail sticks out, reducing the attraction between water molecules. This results in lower surface tension, causing the water to spread out more thinly and not pile up as effectively on the surface of a penny. Therefore, you would expect fewer drops of water to fit on a penny after soap has been added to the water.
The moon's phases are caused by (4 points)
A.the alignment of the planets
B.the alignment of the Earth, moon, and sun
C.eclipses of the sun
D.planets moving across the face of the moon
The answer is B. The alignment of the moon, earth, and sun.
IMPORTANT QUIZ!!!!!!!
the atomic number of an atom is the number of______.
A.protons and neutrons
B.protons
C.neutrons
D.electrons and neutrons
Two families meet at the park at 10:00am. Each family uses a different way of transportation to get there. The Gonzalez family leaves at 9:00am and drives 90 km on a highway. The Rivera leave at 9:30am and ride the train 30km. What is the average speed for each family’s trip? Which family travels at the faster speed?
True or false scientific inquiry incorporates many scientific methods
The correct answer for the given statement above would be option
A. TRUE.
Explanation:
Scientific inquiry is a cooperative and coordinated struggle to search out, describe, describe and predict natural phenomena. Scientific analysis progresses within a continuous process of examination, data collection, interpretation, and interpretation.
If we use _______ to build the roof of the house, then the temperature inside the house will remain cooler.
Wood,Clay Brick,Iron,Aluminum,Copper,
Nickel
Answer:
Wood and clay brick.
Explanation:
If we use wood and clay brick to build the roof of the house the temperature inside the house will remain cooler. As we know wood and clay are non conductor of heat so they not transfer sun's heat inside the room and room remains cooler. On the other hand aluminium, copper and nickel are metals and are good conductor of heat as well they transfer environment's heat inside the room.
two examples of ways that physicists model the physical world
Answering the question, three examples of ways that physicists model the physical world include:
DiagramsEquations Computer simulationsComputer simulations refer to the reproduction of behavior of a system with the use of a computer to simulate the results of a mathematical model that is linked with the system.
Further ExplanationComputer simulations are a tool that is very useful for mathematical modeling in various natural systems in physics.
Physicists write the rule of our universe using equations. Equations are an aspect of one of the models used by physicists to explain a particular situation.
Physicists use a diagram to convey information. It is a symbolic representation of information with the use of visualization techniques. Diagram provides other means for people to better understand information and process its importance.
Physics predictions about the physical world mainly depend on numerical stimulation, mathematics and empirical observations and Physicists models the physical world based on invariances and laws which are built on mathematical models.
The purpose of physics is to explain or describe everything around us. It described virtually everything around us accurately by deploring the law of physics.
However, physics is considered a natural science because it is based on mathematical analysis which is geared towards findings qualitative physical law for the physical world.
LEARN MORE:
examples of ways that physicists model the physical world https://brainly.com/question/10869755KEYWORDS:
physicistsphysicsmodelsphysical worldcomputer simulationsdiagramsequationsWe have that
Two examples of ways that physicists model the physical world is Through
Equations FormulationsDiagrams
From the question we are told that
Two examples of ways that physicists model the physical world
Generally
We First define a Physicists
A physicists is a Scientist,A Physicists is a Scientists that deals meanly on the Discipline of PhysicsThe Discipline of Physics deal with the interaction between matter and energy and Understanding the working principle of Nature
Therefore
Two examples of ways that physicists model the physical world is Through
Equations FormulationsDiagramsFor more information on this visit
https://brainly.com/question/23379286?referrer=searchResults
A cluster of galaxies containing very few galaxies is known as
Answer is a Poor Cluster.
Answer:
A group of galaxies forms a cluster.There are two types of clusters of galaxies.
Rich clusterPoor clusterA rich cluster contains more than thousand galaxies.
A poor cluster contains less than thousand galaxies. Milky way is a part of poor cluster- the local group which has more than fifty galaxies.
Thus, a cluster of galaxies containing very few galaxies is known as poor galaxy.
write one example of a physical change and one example chemical change
PLZZZZ HELP!!!! What is unusual about organisms in the domain Archaea?
A. They are very large.
B. Their rate of reproduction is very fast.
C. They are complex, multicellular organisms.
D. They live in extreme environmental conditions.
A sunflower turns its head toward sunlight. What triggers this behavior in a sunflower?
Answer:
phototropism
I hope this helps
What is a verb phrase
When falling through the air, which of the following objects will hit the ground first?
a penny
a large poster
a shoe box
a cell phone
Answer:
Your answer would be a penny.
Explanation:
Every other answer would have fallen slower because:
A large poster would work as a parachute (which falls slowly.)
A shoe box is empty and big, therefore would fall slowly due to the hollowness and size.
A cell phone is flat and wide (relatively) and would fall slower than the penny EVEN THOUGH it has more weight.
The penny would fall quickly, due to aerodynamics and size. It is small, has weight to it, and other contributing factors prove my point. :)
an atom's mass number equals the number of
Answer:
2
Explanation:
What does Hadero mean when she uses the term, “sonic lineages”. What does she describe as her own sonic lineages?
7. The outermost electrons of the element vanadium (atomic #23) are in which energy level of the atom? How do you know?
Is there a point at which no more sodium and chloride ions will dissolve? How do you know?
A force of 20 N acts toward the east. Another force of 27 N acts at the same point toward the west. What is the magnitude and direction of a third force that produces a resultant of 10 N toward the east?
Suppose you balance a 1.6-kg ball on the tip of your finger, which has an area of 1.1 cm2 .whats the pressure of your finger
Your friend Amanda suffers from a condition that reduces her blood's ability to carry oxygen.which of the following is the name of the condition?
What Is the mass of 7.50 mol of uranium
Final answer:
The mass of 7.50 moles of uranium is 1785.375 g, calculated by multiplying the molar mass of uranium (238.05 g/mol) by the number of moles (7.50).
Explanation:
The question seeks to find the mass of 7.50 moles of uranium. Considering the molar mass of uranium, specifically isotope U-238 which is commonly referred to in problems regarding uranium mass calculations, is 238.05 g/mol. To find the total mass of 7.50 moles of uranium, we use the formula:
Mass = molar mass × number of moles
Thus, the mass of 7.50 mol of uranium is:
238.05 g/mol × 7.50 mol = 1785.375 g
This calculation plainly demonstrates how the molar mass of a substance can be utilized to find the mass of a given number of moles of that substance, an essential concept in chemistry, especially in the field of nuclear chemistry where isotopes such as uranium are frequently discussed.
Can someone explain subshell/electron configuration to me?