A 1.5 kg block is pulled across a horizontal surface that has a coefficient of kinetic friction of 0.60. a. What is the force of friction exerted by the surface on the block?
Answers
Assuming the block is pulled with constant speed, there is no net force acting on it, so that
n + (-w) = 0
p + (-f ) = 0
where n and w denote the magnitudes of the normal force and the block's weight (both acting in the vertical direction), and p and f denote the magnitudes of the pulling and friction forces (both in the horizontal direction).
f is proportional to n by a factor µ = 0.60, so that
f = 0.60 n
The block has weight
w = (1.5 kg) (9.80 m/s²) = 14.7 N
and hence n = 14.7 N.
Then the friction force has magnitude
f = 0.60 (14.7 N) ≈ 8.8 N
and opposes the direction of movement.
Related Questions
The scattered x-ray from a compton interaction usually retains _____ of the energy of the incident photon.
Answers
The scattered X-ray from a Compton interaction usually retains a portion or fraction of the energy of the incident photon.
The exact fraction of energy retained depends on the scattering angle and the energy of the incident X-ray photon. In Compton scattering, the incident X-ray photon interacts with an electron, and as a result, both the photon and the electron experience a change in momentum and energy. The scattered X-ray photon carries less energy than the incident photon due to the transfer of energy to the recoiling electron. The energy loss of the scattered X-ray photon can be calculated using the Compton scattering formula.
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Label the sound wave- amplitude, wavelength, crest, trough
Answers
Answer:
A - Crest, B - amplitude, C - wavelength, D - trough
Explanation:
The amplitude is letter B, the wavelength is letter C, the crest is letter A and the trough is letter D.
What is amplitude, wavelength, crest and trough?Amplitude (B) refers to the maximum displacement or distance from the equilibrium position of a wave.
Wavelength (C) is the distance between two corresponding points on a wave. It is commonly measured as the distance between two consecutive crests or two consecutive troughs of a wave.
A crest (A) is the highest point or peak of a wave. It is the point where the displacement of the medium through which the wave is traveling is maximum in the upward direction.
A trough (D) is the lowest point of a wave. It is the point where the displacement of the medium is maximum in the downward direction.
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Three remote control cars are identical size and weight. The motors installed in the three cars are 100 watts, 150 watts and 200 watts respectively. Describe what will be true about the maximum speed of each car? Explain.
Answers
Answer:
The true statement about the maximum speed of each car will be that the power of each car directly proportional to the speed of each car.
Explanation:
Given that,
Power of first car = 100 watt
Power of second car = 150 watt
Power of third car = 200 watt
We know that,
Power :
The power is directly proportional to the cube of speed.
In mathematically,
\(P\propto v^3\)
Where, P = power
v = speed
If the power is increased then the speed will be increase.
We need to find the maximum speed of car
According to question,
The power of car is maximum so the speed of car will be maximum.
For first car,
The power of first car is 100 watt.
So, the speed of first car will be 1000000 m/s.
For second car,
The power of second car is 150 watt.
So, the speed of second car will be 3375000 m/s.
For third car,
The power of third car is 200 watt.
So, the speed of first car will be 8000000 m/s.
Hence, The true statement about the maximum speed of each car will be that the power of each car directly proportional to the cube of speed of each car.
An element of atomic number 88 decays radioactively to an element of atomic number 82.
Part A
Which of the following emissions achieve this result?
Check all that apply.
a.) one alpha particle and one beta-minus particle
b.) three alpha particles
c.) one alpha particle
d.) six beta-minus particles
An element of atomic number 82 and mass number 214 decays radioactively to an element of atomic number 82 and mass number 210.
Part B
Which of the following emissions achieve this result?
Check all that apply.
a.) four beta-minus particles
b.) two beta-minus particles and one alpha particle
c.) two alpha particles
d.) one alpha particle
Answers
An element of atomic number 88 decays radioactively to an element of atomic number 82. The emissions that achieve this result is one alpha particle. The correct option is D. The emission that achieves this result is one alpha particle. The correct option is C.
To determine the emissions that achieve the radioactive decay from an element with atomic number 88 to an element with atomic number 82, we need to consider the changes in atomic number and mass number during the decay process.
In a radioactive decay, the atomic number decreases by the emission of a particle, and the mass number decreases by a specific amount as well.
Atomic number of initial element = 88
Atomic number of final element = 82
From this information, we can conclude that the decay process involves the emission of an alpha particle.
The emission of an alpha particle corresponds to the emission of a helium nucleus, which consists of two protons and two neutrons. This emission reduces the atomic number by 2 and the mass number by 4.
Therefore, the emission that achieves this result is C, one alpha particle.
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In Greenland there is a glacier called the Jakobshavn Isbrae that moves more quickly than any other
glacier known to mankind. It travels 8.2 millimeters every day. How far does the glacier move in a YEAR?
Convert units and show your work. (HINT-> how many days are there in a year? How many millimeters
in a meter?)
Answers
Answer:
8.2 mm / day * 1 m / 1000 mm = .00082 m / day distance in 1 day
365 day / 1 yr * .00082 m / day = .30 m / yr
14) Calculate the magnitude and direction of the magnetic force on a particle of charge q= 13C that
is moving with a velocity of v= -20m/s x (to the left) in a magnetic field of B= 0.5 T 2
Answers
The magnitude and direction of the magnetic force on a particle of charge is - 2.21 in the opposite direction.
What is magnetic force?Magnetic force is defined as the electrically charged particles that are in motion and exhibit either attraction or repulsion. The interaction between moving and stationary charged particles is explained by the electromagnetic force, commonly known as the Lorentz force.
The magnitude and direction of the magnetic force can be calculated as
F = q v B sinθ
Given q = 13 C
v = - 20 m/s
B = 0.5 T²
F = 13 C x - 20 m/s x 0.5 T² sinθ
F = - 130 sinθ
Let θ is equal to 1
Then, F = 130 sin1
F = - 130 x 0.017
F = - 2.21
Thus, the magnitude and direction of the magnetic force on a particle of charge is - 2.21 in the opposite direction.
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akhil francis, daiwei zhu, cinthia huerta alderete, sonika johri, xiao xiao, james k. freericks, christo- pher monroe, norbert m. linke, and alexander f. kem- per. many-body thermodynamics on quantum com- puters via partition function zeros.
Answers
The mentioned authors, Akhil Francis, Daiwei Zhu, Cinthia Huerta Alderete, Sonika Johri, Xiao Xiao, James K. Freericks, Christopher Monroe, Norbert M. Linke, and Alexander F. Kemper, have contributed to a research paper titled "Many-Body Thermodynamics on Quantum Computers via Partition Function Zeros."
The research paper explores the application of quantum computers in studying many-body thermodynamics, specifically focusing on the partition function zeros. The authors investigate how quantum computers can be utilized to calculate and analyze the partition function zeros, which play a crucial role in understanding the properties and behavior of many-body systems. By harnessing the computational power of quantum computers, this research aims to enhance our understanding of complex many-body systems and advance the field of quantum thermodynamics. The paper likely discusses the theoretical framework, methodologies, and potential implications of this approach.
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Rank the main causes of death among young children, from the highest incidence to the lowest incidence. ____
Answers
Unintentional injuries caused by accidents are the number one killer of children and teenagers.
What causes the majority of adolescent deaths?
A little over half of all adolescent fatalities are caused by accidents. Over one-third of all fatal accidents fall under the category of motor vehicle fatalities, which is the top cause of death for teens. Non-Hispanic black male teens have the highest death rate.
The top causes of mortality for children under 5 years old continue to be congenital anomalies, pre-term birth complications, birth asphyxia, and other infectious diseases like pneumonia, diarrhea, and malaria. According to a recent study, homicide is the top cause of death for children in the United States, and the total rate has grown by 4.3% annually on average.
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define from which of Earth's systems are mineral resources obtained?
Answers
Sources of mineral resources are most commonly magma, sediments, or hydrothermal fluids.
Examples of mineral resources are iron, diamond, gold, silver, copper, aluminum, granite, marble, clay, salt, rare earths or fossil fuels.
What are mineral resources?
A mineral resource is a concentration of natural solid inorganic or fossilized organic matter, including metals, coal and minerals, in sufficient quantity and quality to have reasonable prospects for economic exploitation. This definition has a broader scope than mineral reserves that are likely to be economically recovered based on consideration of technical, economic, and legal concerns.
Mineral resources means minerals, naturally occurring solid inorganic substances, or naturally occurring solid fossilized organic substances (including base metals, precious metals, coal and industrial minerals), in or on the earth's crust, such Means concentrated or occurring in form and quantity and in its grade or quality. There are reasonable prospects for economic development. The location, quantity, grade, geological features and continuity of Mineral Resources are known, estimated or interpreted on the basis of specific geological evidence and knowledge.
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An aeroplane accelerates uniformly from an initial velocity of 100 m.s-1 to a velocity of 200 m.s-1 in 10 seconds. It then accelerates uniformly to a final velocity of 240 m.s-1 in 20 seconds. Let the direction of motion of the aeroplane be the positive direction.
(a) Calculate the acceleration of the aeroplane during the first 10 seconds of the motion
(b) Calculate the distance the plane travels in the first 10 seconds
(c) Calculate the acceleration of the aeroplane during the next 20 seconds of its motion.
(d) Calculate the distance the plane travels in 20 seconds
Answers
Aikakajaj
Why is the heliocentric model not correct
Answers
Answer:
Um, wrong.
Explanation:
The Helioentric model is correct. We orbit the sun. The GEOcentric model is incorrect. The Universe does not orbit the Earth. What are you learning?
Use the drop-down menu to answer the question. A student is going to produce static charge in a glass rod by rubbing it with a piece of silk. Which method of transferring charge is being described?.
Answers
Answer:
Friction
Explanation:
edge 2022
This method of transferring charge by rubbing objects is charging by friction.
What is meant by charging ?Charging is defined as the phenomenon of transferring charge between two objects by supplying electrons between the objects.
Here,
The student done an experiment of rubbing a glass rod with a piece of silk and as a result, static charge is produced.
This is because, when the two objects are rubbed against each other, there occurs a friction between them. During this process, the glass rod that has free electrons that are freely bound to it will transfer its electrons to the piece of silk cloth. As a result, the glass rod will lose electrons and will have an electron deficiency, that means the glass rod becomes positively charged. At the same time, the silk cloth will acquire the electrons and the piece of silk becomes negatively charged.
This phenomenon of transferring charge between two objects when they are rubbed against each other is called charging by friction.
Hence,
This method of transferring charge by rubbing objects is charging by friction.
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Atom A has an atomic number of 19 and a mass number of 40. Atom B has an atomic number of 20 and a mass number of 40. Which of these is an accurate statement?
A) Atom A has more protons than Atom B.
B) Atom A has one less proton and one more neutron than Atom B.
C) Atom A has an extra nucleon compared to Atom B.
D) Atom A has one more proton and one more electron than Atom B
Answers
Answer:
B
Explanation:
A llama runs until reaching its top speed. A graph of the llama's velocity over time is shown
below.
What is the llama's average acceleration from 15 to 20 seconds?
Answers
The average acceleration for that time interval will be zero because the velocity is constant.
What is acceleration?If an object's velocity changes, it is said to have been accelerated. An object's velocity can alter depending on whether it moves faster or slower or in a different direction. A falling apple, the moon orbiting the earth, and a car stopped at a stop sign are a few instances of acceleration. Through these illustrations, we can see that acceleration happens whenever a moving object changes its direction or speed, or both.
What is velocity?Velocity and speed describe how quickly or slowly an object is moving. We frequently encounter circumstances when we must determine which of two or more moving objects is going faster. If the two are travelling on the same route in the same direction, it is simple to determine which is quicker. It is challenging to identify who is moving the fastest when their motion is in the other direction. The concept of velocity is useful in these circumstances. Learn about the definition of velocity in this article as well as the distinction between speed and velocity.
the velocity is constant at -20 m/s. Hence the average acceleration for that time interval will be zero because the velocity is constant.
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Answer:
0
Explanation:
i did it on khan academy
how many basic forces are there in the universe?
Answers
Answer:
Four basic fources.
Explanation:
Fundamental force, also called fundamental interaction, in physics, any of the four basic forces—gravitational, electromagnetic, strong, and weak—that govern how objects or particles interact and how certain particles decay. All the known forces of nature can be traced to these fundamental forces.
If a net force acting on a moving object causes its speed to increase, what
happens to the object's momentum?
A. It stays the same.
B. It increases.
C. It changed directions.
D. It decreases.
Answers
Answer:
It increases.
Explanation:
If a force acts in the same direction as the object's motion, then the force speeds the object up. Either way, a force will change the velocity of an object. And if the velocity of the object is changed, then the momentum of the object is changed.
The apparent weight of a fish in an elevator is greatest when the elevator
1) moves downward at constant velocity.
2) moves upward at constant velocity.
3) accelerates downward.
4) accelerates upward.
5) is not moving.
Answers
The apparent weight of a fish in an elevator is greatest when the elevator 4) accelerates upward.
The apparent weight of an object is the force experienced by the object due to gravity and other forces acting on it. In the case of an elevator, the apparent weight of an object inside the elevator can change depending on the motion of the elevator.
When the elevator is at rest, the apparent weight of an object inside it is equal to its actual weight. This is because the elevator and the object inside it are both stationary and not experiencing any acceleration.
However, when the elevator starts to move, the apparent weight of an object inside it can change. There are two scenarios to consider:
The elevator is moving with a constant velocity: In this case, the object inside the elevator experiences a net force due to the acceleration of the elevator.
The magnitude of this force is equal to the mass of the object times the acceleration of the elevator. The apparent weight of the object is the sum of its actual weight and this net force.
If the elevator is moving upward with a constant velocity, the apparent weight of the object will be slightly less than its actual weight, as the net force is slightly less than the force of gravity.
The elevator is accelerating: In this case, the object inside the elevator experiences an additional force due to the acceleration of the elevator. If the elevator is accelerating upward, the apparent weight of the object will be greater than its actual weight, as the net force is greater than the force of gravity.
This is because the force of gravity acting on the object is being added to the force due to the upward acceleration of the elevator.
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Think about holding a glass of cold water. Your hand is warmer than the glass. Do the particles in your hand or those in the glass of cold water move faster? Why?
Answers
technically usually the warmer object/substances particles move master which causes friction among the particles plus the kinetic energy being converted to thermal energy, so i would say the hand.
As a high-altitude balloon rises higher into the atmosphere, it undergoes a decrease in
A) volume.
B) density.
C) weight.
D) mass.
E) none of the above
Answers
As a high-altitude balloon rises higher into the atmosphere, it undergoes a decrease in B) density.
As the high-altitude balloon rises higher into the atmosphere, the atmospheric pressure decreases, causing the gas inside the balloon to expand and the volume to increase. However, the mass of the gas remains the same. Therefore, the density of the gas inside the balloon decreases as it rises higher into the atmosphere.
Electric current is the flow of electrons in a conductor, such as a wire. Individual electrons do not, however, move quickly through the wire. The average speed at which electrons flow across a wire while an electric field is present is referred to as the drift velocity.
Electrons frequently interact and shift direction because of collisions with other particles in the conductor. These collisions reduce their net movement and impede their total advancement. In comparison to the speed of individual electrons, the drift velocity is on the order of millimetres per second.
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In the process of loading a ship, a shipping container gets dropped into the water and sinks to the bottom of the harbor. Salvage experts plan to recover the container by attaching a spherical balloon to the container and inflating it with air pumped down from the surface. The dimensions of the container are 5.80 m long, 2.60 m wide, and 2.80 m high. As the crew pumps air into the balloon, its spherical shape increases and when the radius is 1.50 m, the shipping container just begins to rise toward the surface. Determine the mass of the container. You may ignore the weight of the balloon and the air in the balloon. The density of seawater is 1027 kg/m3.
Answers
Answer:
57.885.8 kg weight of the container
Explanation:
The volume of the balloon * density of water = buoyant force of balloon
volume of a sphere = 4/3 pi r^3
= 4/3 pi * (1.5)^3 = 14.14 m^3 <===balloon volume
Now, find the buoyant force on the container ALONE ....
5.8 * 2.6 * 2.8 * 1027 = 43 364 kg <===== buoyant force
Now add the buoyant force of the balloon to find the weight
43 364 + 14.14 * 1027 = 57885.8 kg
two forces are exerted on an object. a 36-n force acts at 225° and a 48-n force acts at 315°. what are the magnitude and direction of the equilibrant?
Answers
The given two forces, 36 N and 48 N, acting at 225° and 315° respectively on an object. To find the magnitude and direction of the equilibrant, follow these steps:
The two forces can be resolved into its horizontal and vertical components as follows: 36 N force acting at 225° can be resolved into;
Fy = F sin θ = 36 sin 225° = -25.46 NFx = F cos θ = 36 cos 225° = -25.46 N and the 48 N force acting at 315° can be resolved into;
Fy = F sin θ = 48 sin 315° = -24.00 NFx = F cos θ = 48 cos 315° = 24.00 NThe components of forces in X direction are equal and opposite, hence net force in X direction is 0
.The components of forces in Y direction are also equal and opposite, hence the net force in Y direction is 0. Therefore, the equilibrant is equal to the sum of the two components;
QE = √(48 cos 315° + 36 cos 225°)² + (-48 sin 315° - 36 sin 225°)²= 48.41 N
The direction of the equilibrant is;
Qθ = tan⁻¹(-(48 sin 315° + 36 sin 225°)/(48 cos 315° + 36 cos 225°))= tan⁻¹(-1.235) = -51.63°
Therefore, the magnitude and direction of the equilibrant are 48.41 N and -51.63° respectively.
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in order to allow both telecommunications and power cables in a cable tray or cable runway, they must be ? , as required by the national electrical code (nec).
Answers
To accommodate both telecommunications and power cables in a cable tray or cable runway, they must be separated, as mandated by the National Electrical Code (NEC).
The National Electrical Code (NEC) sets standards for electrical installations to ensure safety and proper functioning. According to NEC guidelines, telecommunications and power cables should be physically separated when placed in a cable tray or cable runway. This separation is necessary to prevent interference and potential hazards. Telecommunications cables carry data signals, while power cables carry electrical currents. When these cables are in close proximity, there is a risk of electromagnetic interference (EMI) from the power cables affecting the data signals in the telecommunications cables. This interference can lead to signal degradation and communication errors. Additionally, power cables carry high voltage, which poses a safety hazard if there is a fault or short circuit. Therefore, by keeping telecommunications and power cables separated in cable trays or runways, the risk of interference and safety concerns is minimized, ensuring proper functionality and compliance with the NEC.
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a stone is thrown vertically upwards with an initial velocity of 20 metre per second find the maximum height it reaches and the time taken by to reach the height( g =10m/s)
Answers
Answer:
y = 20 [m]
Explanation:
To solve this type of problem we must use the following equation of kinematics.
\(v_{f}^{2} =v_{o}^{2}-2*g*y\)
where:
Vf = final velocity = 0
Vo = initial velocity = 20 [m/s]
g = gravity acceleration = 10 [m/s²]
y = elevation [m]
Now the key to solving this problem is to know that when the stone reaches the maximum height its speed is zero. Therefore the final velocity term is zero.
\(0 = (20)^{2}-2*10*y\\20*y=400\\y=20 [m]\)
Another important fact is that the sign of gravitational acceleration was taken as negative, since it acts in the opposite direction to the movement of the stone.
Why we need football?
Answers
Answer:
bc we play when we are bored and some people use it as a tradition to play on thanksgiving
which type of star has surface temperature of 4000k and a luminosity 1000 times greater than the sun
Answers
A yellow hypergiant star has surface temperature of 4000k and a luminosity 1000 times greater than the sun.
A yellow hypergiant star is a rare type of star that has a surface temperature of around 4000k and a luminosity that can be up to 1000 times greater than the sun. These stars are among the largest and most luminous in the universe, and are thought to be in a stage of rapid evolution. They are very rare, with only a few known examples in the Milky Way galaxy.
Yellow hypergiants are believed to be extremely unstable and may eventually explode as supernovae, leaving behind a black hole or neutron star. Their extreme luminosity means they can be easily observed by astronomers and can provide important information about the life cycle of stars and the evolution of the universe.
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3) given two different resistances, how does the rate of joule heating in them differ if they are connected to a fixed voltage source: (a) in series? (b) in parallel?
Answers
If two resistances, R1 and R2, are connected to a fixed voltage source in series, then the rate of joule heating in each resistance will be the same because they will both have the same voltage drop. However, if they are connected in parallel, then the rate of joule heating in R1 and R2 will be different because they will have different current flow.
When two different resistances are connected to a fixed voltage source, the rate of joule heating in them differs depending on whether they are connected in series or in parallel.
(a) In series, the total resistance of the circuit is the sum of the two resistances. This means that the current flowing through the circuit is lower than it would be if the resistances were connected in parallel. As a result, the rate of joule heating is lower in series than in parallel.
(b) In parallel, the total resistance of the circuit is lower than the resistance of either individual resistor. This means that the current flowing through the circuit is higher than it would be if the resistances were connected in series. As a result, the rate of joule heating is higher in parallel than in series.
In conclusion, the rate of joule heating in two different resistances connected to a fixed voltage source differs depending on whether they are connected in series or in parallel. In series, the rate of joule heating is lower, while in parallel, the rate of joule heating is higher.
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Please help. I need to know why B is the correct answer. I will mark you as brainiest and I can help you with something you need help with, I just really need help on this
Answers
B The glider moves to the right because the magnitude of the change in momentum of the rubber ball is greater than the magnitude of the changes in momentum of the clay ball.
How does the force occur?The magnitude of the change in momentum of an object is equal to the force exerted on it multiplied by the time during which the force acts. Since the glider has the same mass as the two balls combined, its change in momentum must be equal and opposite to the total change in momentum of the balls.
The clay ball has a smaller magnitude of change in momentum than the rubber ball because it sticks to the glider and does not rebound. Thus, the magnitude of the change in momentum of the rubber ball is greater than that of the clay ball, and since the two changes in momentum are equal and opposite, the glider must move in the direction of the rubber ball's change in momentum, which is to the right.
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Image transcribed:
A day hall and a rubber ball of identical mass are moving toward a gider that is at rest in a frictionless air track The balls have the same speed, with the rubber ball moving toward the left as shown above. The balls strike the glider at the same time. The day ball sticks to the glider and the rubber ball bounces off it.
Which of the following indicates the direction of motion of the glider after the collisions and explains why it moves in that direction?
A The glider moves to the left because the clay ball has more inertia when it sticks to the glider than the rubber ball does when it bounces off.
B The glider moves to the right because the magnitude of the change in momentum of the rubber ball is greater than the magnitude of the changes in momentum of the clay ball
C The glider moves to the left because the clay ball exerts a force on the glider for a longer time than the rubber ball does.
D The glider moves to the right because the collision with the rubber ball is elastic and conserves energy
Light striking a metal surface causes electrons to be emitted from the metal via the photoelectric effect.
The intensity of the incident light and the temperature of the metal are held constant. Assuming that the initial light incident on the metal surface causes electrons to be ejected from the metal, what happens if the frequency of the incident light is increased?
Answers
If the frequency of the incident light on a metal surface is increased while keeping the intensity and temperature constant, the kinetic energy of the emitted electrons will increase.
The photoelectric effect states that when light of sufficient frequency (above the threshold frequency) strikes a metal surface, electrons are emitted. The energy of a photon is given by the equation E = hf, where E is the energy, h is Planck's constant, and f is the frequency of the light.
The energy of the emitted electron is equal to the energy of the incident photon minus the work function of the metal (Φ), which represents the energy required to remove an electron from the metal surface. So, the equation becomes E = hf - Φ.
As the frequency of the incident light increases, the energy of each photon increases. Therefore, the kinetic energy of the emitted electrons will increase as well.
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The detergent solution the dishes are washed in must be at least____ ° F. a) 125. b) 118. c) 110. d) 100.
Answers
The detergent solution used for washing dishes must be at least 110°F (option c) to effectively remove grease and bacteria.
To properly clean dishes, it is important to use a detergent solution at a certain temperature. The minimum temperature requirement ensures that the detergent is effective in breaking down grease and removing bacteria from the dishes.
The temperature of 110°F is often recommended as it provides the ideal balance between effectiveness and safety. At this temperature, the detergent can effectively dissolve and remove oily residues, food particles, and germs from the dishes. It helps to break down and emulsify fats and oils, facilitating their removal during the washing process.
Using hotter water can enhance the cleaning process by improving the detergent's ability to dissolve and remove contaminants. However, it is essential to strike a balance to prevent potential risks such as scalding or damage to delicate items. Therefore, maintaining a minimum temperature of 110°F ensures efficient cleaning while minimizing safety concerns.
It's worth noting that specific dishwasher models or dishwashing guidelines may recommend slightly different temperature ranges. It is advisable to follow the manufacturer's instructions or consult the dishwasher manual for the most suitable temperature settings for optimal dishwashing results.
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a pole is any material that attracts iron and materials that contain iron. true or false
Answers
True, a pole is any material that attracts iron and this is known as magnetism. This is due to the fact that iron is a ferromagnetic material, which means it has a strong attraction to magnetic fields.
However, not all materials that contain iron are necessarily magnetic. Iron is commonly found in a variety of materials such as steel, iron ore, and cast iron, among others. However, other elements can be added to these materials, altering their magnetic properties.
For example, adding carbon to iron creates steel, which can be made into both magnetic and non-magnetic forms. Additionally, some materials that contain iron, such as aluminum or copper, are not magnetic at all. So while it is true that a pole is any material that attracts iron, not all materials that contain iron are necessarily magnetic.
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