Answer:
As the wagon approaches the bottom of the hill, the potential energy decreases and the kinetic energy increases.
Explanation:
There are two types of energy possessed in the wagon i.e. potential energy and the kinetic energy. As a wagon is accelerating down a hill, its potential energy decreases and the kinetic energy increases.
We know that the energy possessed due to its height above ground level is called its potential energy while the energy possessed due to its motion is called its kinetic energy.
So, the correct option is (A) " As the wagon approaches the bottom of the hill, the potential energy decreases and the kinetic energy increases".
A small cuckoo clock has a pendulum 25cm long with a mass of 10g and a period of 1s. the clock is powered by a 200gram weight which falls 2m between the daily windings. the amplitude of the swing is 0.2rad. what is the q value of the clock?
Which is the correct equation for calculating the kinetic energy of an object ?
The area of a sound wave where particles are spread apart is called a _________________________.
How are radio waves used on Earth?
Explanation:
Radio wave is an electromagnetic wave. It travels with the speed of the light. It is the longest wavelength in the electromagnetic spectrum.
Radio wave is used in cellphone and radio communication.
Radio wave is generated by transmitters. It is received by using an antenna.
Radio wave is used in RADAR. RADAR is a detection system. It is used to determine the velocity of the object.
Modern architects debated which was more important: form or function. Who inspired future architects to look at architectural design from a functional perspective?
Louis Sullivan, an influential 19th-century architect, inspired future architects to prioritize function in design with his famous precept "form follows function", which became foundational to modern architecture. His approach led to the simplification of forms and the notion that buildings should express their structure and materials honestly.
The architect who inspired future architects to look at architectural design from a functional perspective was Louis Sullivan. Sullivan, a great 19th-century architect, famously stated that "form follows function". This philosophy became a central tenet of modern architecture, emphasizing that architectural design should prioritize the function, or use, of the building, leading to simplification of forms and an absence of unnecessary ornamentation.
Modern architecture thus embraced the idea that form should be derived directly from the building's purpose. The aesthetic, psychological, and cultural facets of a building's use were all considered part of its function. This approach was radical at the time and laid the foundation for the functionalist details seen in modernist buildings, which often display structural elements like steel beams and concrete surfaces as part of the design rather than concealing them.
The modernist architects' approach was further characterized by a motto that 'decoration is a crime', signifying a move away from historic styles and towards a more truthful expression of materials and structure.
A 52 g plastic ball is moving to the left at 24 m/s . how much work must be done on the ball to cause it to move to the right at 24 m/s ?
To cause the plastic ball to move to the right at 24 m/s, 499.04 J of work must be done on it.
Explanation:The work done on an object is equal to the change in its kinetic energy. In this case, the plastic ball is initially moving to the left at 24 m/s. To cause the ball to move to the right at 24 m/s, the work done on it must change its direction and increase its speed by 48 m/s (difference between -24 m/s and 24 m/s). The work done can be calculated using the formula for work: Work = Change in kinetic energy = (1/2) * mass * (final velocity^2 - initial velocity^2).
Given that the mass of the ball is 52 g (0.052 kg) and the change in velocity is 48 m/s, we can plug in these values into the formula:
Work = (1/2) * 0.052 kg * (48^2 - (-24)^2) = 499.04 J
Therefore, 499.04 J of work must be done on the ball to cause it to move to the right at 24 m/s.
Answer: The resulting answer for this is 0 Joules
Explanation: For any answer that talks about a complete 180 direction change with the same velocity, the answer will always be zero.
KE = 1/2mv1^2 - 1/2mv2^2 which leads to KE = 1/2m(v1^2-v2^2) = (1/2)(0.052kg)(24^2m/s - 24^2m/s) = 0 J
How far does the moon move away from earth every year?
Answer:
1.6 inch (4 cm)
Explanation:
Currently moon is about 3.85 ×10⁵ km away from the Earth on an average. The gravitational pull of the Earth is keeping the moon in its orbit around the Earth. The gravitational pull of moon causes tidal bulge. The Earth tends to drag ahead this bulge from the slow orbiting moon. Due to this, the rotation of the Earth is slowing down and moon is being pushed away slowly. Every year moon is pushed to about 1.6 inches or 4 cm away from the Earth.
What is the magnitude of B?
speed=2.64*10^7
radius .160m
R=mv/|q|B,
An important difference between waves and classical particles is that A. waves cannot interfere. B. particles cannot interfere. C. waves can only interfere destructively. D. particles can only interfere destructively.
What conditions in the nucleus are likely to result in an atom undergoing radioactive decay?
a. When the attraction of the strong force is weaker than the repulsion of the electrostatic force
b. When the repulsion of the strong force is weaker than the repulsion of the electrostatic force
c. When the repulsion of the strong force is greater than the attraction of the electrostatic force
d. When the attraction of the strong force is greater than the attraction of the electrostatic force,
A.) When the attraction of the strong force is weaker than the repulsion of the electrostatic force
Two people each hold the end of a rope and create waves by moving their arms up and down. This wave is best classified as a transverse wave because ___________
the answer is C the wave is moving horizontally as the particles of the rope move up and down.
Answer:
c
Explanation:
c
To prevent collisions and violations at intersections that have traffic signals, use the _____ to ensure the intersection is clear before you enter it.
To prevent collisions and violations at intersections that have traffic signals, use the: Delayed acceleration technique.
A roundabout can be defined as a circular intersection that are typically designed to make junctions or intersections of roads safer, by physically directing drivers, cyclists, and pedestrians to move in a counter-clockwise direction.
Generally, there are two (2) main types of roundabout and these include;
Multi-lane roundabout.Single-lane roundabout.A delayed acceleration technique involves waiting to go through an intersection until a driver is able to properly scan for any vehicular movement by other road users (drivers).
Based on statistics, the chances of collisions are highest on roads with intersections.
In order to prevent any form of collision and violation at road intersections that have traffic signals, drivers should use the delayed acceleration technique because it helps to ensure an intersection is clear before entering it.
In conclusion, drivers should ensure a road intersection is clear before they enter it.
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23) A high school website directs parents to not allow student access to blue laser pointers or allow the students to bring them to school. It includes a video describing the danger inherent in the misuse of all laser pointers particularly the blue laser pointer. Why would they claim that blue laser pointers are more of a concern than red laser pointers?
What is the motion of the particles in this kind of wave?
A. The particles will move up and down over large areas.
B. The particles will move up and down over small areas.
C. The particles will move side to side over small areas.
D. The particles will move side to side over large areas.
List five rules of golf etiquette. Explain the correct stance, grip, orientation, and parts of a swing.
Answer:
1: Wear proper uniform as per the requirement.
2: One should be agree to rules before start of game.
3: Not to make too much noise on ground.
4: Respect the decision.
5: Balls.
Explanation:
* For correct posture, one should stand with a larger open feet, this will help to swing easily and a greater force will be applied.
* Tight grip is necessary to hold the stick and for proper shots. The grip should be tight at the end of the stick.
Which one of the following scenarios accurately describes a condition in which resonance can occur? A. A vibrating tuning fork is struck and begins to vibrate as the object used to strike it is placed away from the tuning fork. B. A column of air has a height equal to 1⁄8 of the wavelength of the sound waves produced by a tuning fork vibrating over the column of air in an open pipe that's partially immersed in water. C. A pipe's length is equal to 1⁄2 of the wavelength of the sound waves produced by a tuning fork vibrating over one end of the pipe that's open to the air at both ends. D. A person is holding a tuning fork on one end of a football field and another person is holding a separate tuning fork on the opposite end of the field.
A student throws a ball straight down off a very high building with a velocity magnitude of 3.0 m/s the ball accelerated in free fall for 2.0s what is the velocity at 2.0s
After being thrown downwards from a high building with an initial velocity of 3.0 m/s, and accelerating in free fall for 2.0s, the velocity of the ball would be 22.6 m/s.
Explanation:The student throws a ball downwards with an initial velocity of 3.0 m/s. In a situation of free fall, the object accelerates due to gravity, which is approximately 9.8 m/s² on Earth's surface. As the ball is being thrown downwards, the gravitational acceleration would add to the initial velocity.
We can use the equation v = u + at to find the velocity of the ball after a certain time where:
v = final velocity
u = initial velocity
a = acceleration
t = time
The initial velocity (u) here is 3.0 m/s, acceleration (a) is 9.8 m/s² (as the object is in free fall), and time (t) is 2.0s (as given).
So substituting these values in the equation, we get:
v = 3.0 m/s + (9.8 m/s² * 2.0s) = 3.0 m/s + 19.6 m/s
This sums up to a final velocity (v) of 22.6 m/s. Therefore, the ball's velocity after 2.0 seconds is 22.6 m/s.
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A metal sphere has a charge of +8.0 mc. what is the net charge after 6.0×1013 electrons have been placed on it?
Someone please help?? :(
Julie started with Newton's second law of motion. She drew a free-body diagram of an inclined plane experiment. She derived an equation for the acceleration down the inclined plane and determined how it would change if she changed the angle of the incline. From there she was able to derive an equation to find the coefficient of friction of any material on the inclined plane.
In the scenario, how did Julie determine her findings on the coefficient of friction?
a. inductive reasoning
b. deductive reasoning from a valid principle
c. deductive reasoning from an invalid principle,
static electricity occurs when electrons build up and _________
99 points!!!! HELP ASAP
Why does sound move faster in solids mediums
A. The particles in solids or more compact
B. The particles in between them
C. Solids are the coldest medium
D. Sound does not move fastest in solids it moves fastest in gases
sound move faster in solids mediums because
A. The particles in solids or more compact
Sound move faster in solids mediums because the particles in solids or more compact. So, the correct option is (A).
What is Sound?
Sound is a type of vibration which propagates as an acoustic wave, through a transmission medium like gas, liquid or solid. It is the reception of such waves and their perception by the brain.
It is a type of energy made by vibrations. The movement of surrounding air molecules occurs due to the object vibration. These molecules bump into the molecules close to them which causes them to vibrate as well and makes them bump into more nearby air molecules.
Sound travels faster in solids than in liquids and gases because the molecules of solids are closer together which can transmit vibrations (energy) faster. Sound travels slowest through liquids and gases because the gas molecules are farthest apart.
Thus, Sound move faster in solids mediums because the particles in solids or more compact. So, the correct option is (A).
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When sea ice forms in the ocean, the salinity of the surrounding ocean water would ?
Answer:
increases
Explanation:
When sea ice forms in ocean salinity of surrounding ocean water increases.
The salt plays an important role in the ocean circulation.When sea ice is formed in an ocean then this indicates the insertion of salt into the ocean. The salinity of surrounding water increases as salt water is heavier i.e its density is more as a result of high density the water sinks.There is an exchange of salt takes place between ocean and the sea ice.This influences the ocean circulation and this circulation lasts up to several hundreds of kilometers.
What would happen to the speed of sound travelling through water as it freezes and becomes solid? A) The speed of sound should increase as it solidifies. B) The speed of sound should decrease as it solidifies. C) The speed of sound does not change because the chemical is still H2O. D) The speed of sound only changes with temperature. Ice freezes at a constant temperature.
Answer: The correct answer is option(A).
Explanation:
Sound travels fast in air , faster in liquid and fastest in solids.
This is because the particles in solid state are tightly packed by which no collisions between particles are present unlike in liquids and gases.
In gases, particles are far apart due to which particles are free to collide which each other. Due to these collisions the speed of sounds slows down in the gaseous state.
According to question the speed of the sound in water will increase on freezing because state of water is changing into solid state from liquid state. And sounds travels fastest is solid state of matter which means that speed will increase on solidification.
Hence, correct answer is option A.
the electron cloud model describes which of the following
the group of protons that are in the nucleus
the neutron orbital
the negative charge of the electron
location where an electron has the highest probability of being found
The electron cloud model in physics describes the location where an electron has the highest probability of being found around an atom. Option D
The older Bohr model of the atom, which showed electrons orbiting the nucleus in set pathways like to planets orbiting the sun, was superseded by this one. Instead of representing electrons as particles in fixed orbits, the electron cloud model views electrons as a cloud-like region surrounding the nucleus, with each point representing the likelihood of finding an electron there.
This idea highlights how electrons are characterized by their quantum mechanical nature, which prevents them from being localized and instead allows them to be represented by probabilities within particular spatial regions surrounding the nucleus. Therefore, the understanding of electron dispersion surrounding the nucleus of an atom depends on the electron cloud model.
The electron cloud model describes the location where an electron has the highest probability of being found within an atom.
This model, also known as the quantum mechanical model, represents electrons not as definite orbits but as regions of probability called electron clouds.
It accounts for the wave-like nature of electrons and their distribution in atomic orbitals, where electrons are most likely to be found based on their energy levels and quantum numbers.
It does not describe the group of protons in the nucleus, the neutron orbital, or the negative charge of the electron; rather, it focuses on the spatial distribution of electrons in an atom.
A condition that affects the ability to sleep or the quality of sleep is referred to as a __________.
A. parasomnia
B. sleep disorder
C. sleep debt
D. night terror
The strength of friction depends on what two factors
A spring whose spring constant is 850 N/m is compressed 0.40 m. What is the maximum speed it can give to a 500 g ball? ____m/s
Answer Choices:
136
16.5
12.5
272
680
18.6
8.4
26
Using the conservation of energy, the spring's potential energy when compressed is converted to the ball's kinetic energy. By calculating the potential energy stored in the spring and equating it to kinetic energy, the maximum speed of a 500 g ball released from a spring compressed by 0.40 m can be determined to be approximately 12.5 m/s.
Explanation:To find out the maximum speed that a spring with a spring constant of 850 N/m can give to a 500 g ball when it is compressed 0.40 m, we use the principle of conservation of energy. The potential energy stored in the compressed spring is fully converted into the kinetic energy of the ball at the moment the spring releases its compression and the ball leaves the spring. We formulate this using Hooke's Law for spring potential energy and the kinetic energy expression.
The potential energy (PE) stored in the compressed spring is given by:
PE = 1/2 k x2, where k is the spring constant and x is the displacement from its equilibrium position.
PE = 1/2 (850 N/m) (0.40 m)2 = 68 J
This energy is converted into kinetic energy (KE) which is given by:
KE = 1/2 m v2, where m is the mass and v is the final speed of the ball.
By setting the potential energy equal to the kinetic energy: 1/2 k x2 = 1/2 m v2, we can solve for v for maximum speed of the 500 g ball.
68 J = 1/2 (0.5 kg) v2
v = sqrt(2 * 68 J / 0.5 kg)
v ≈ 13.07 m/s
Therefore, the closest answer choice to the calculated maximum speed is 12.5 m/s.
How much work does the electric field do in moving a proton from a point with a potential of +145 v to a point where it is -55 v ? express your answer in joules?
Final answer:
The electric field does work on a proton when it moves between two points with a potential difference, with the value calculated as 3.204 × 10-17 joules.
Explanation:
The question asks us to calculate the work done by the electric field in moving a proton between two points with a specified electric potential difference. Since work done by an electric field is equal to the charge of the particle times the change in electric potential (W = qV), and we know the proton's charge is approximately 1.602 × 10-19 coulombs, we can calculate the work done as follows:
Change in potential (V) = Vfinal - Vinitial = (-55 V) - (+145 V) = -200 VWork done by the electric field (W) = qV = (1.602 × 10-19 C) × (-200 V) = -3.204 × 10-17 JThe negative sign indicates that the electric field is doing work on the proton in the direction opposite to the electric field. Therefore, the electric field does 3.204 × 10-17 joules of work on the proton.
a charge of 6.4x10^-7 C experiences an electric force of 1.8x10^-1 N what is the electric field strength
As you add additional light bulbs in series, which graph represents the total voltage across the light bulbs?
Answer:
here are the graphs
Explanation: