The magnitude of the electric field is 50 N/C and the direction is to the right. The electric field is there whether or not a charged object is present in that area.
How is an electric field created?An electric field, or alteration of a space and field in the vicinity of a charged item, is produced. The odd change in the environment would be felt by other charges within this sector.
What transpires in a field of electricity?A charged particle produces electric force in the area around it, which is known as the electric field. Electric fields interact when charged particles were close enough to one another to exert force on one another. Incompatiblely charged particles are drawn to one another. Like-charged particles repel one another.
The magnitude and direction of the electric field can be found using the formula:
F = qE
where F is the force exerted on the charge, q is the charge, and E is the electric field.
Given that the force exerted on the charge is 4 N, and the charge is 0.08 C, we can find the electric field by rearranging the equation to:
E = F/q
The magnitude of electric field is:
E = 4 N / 0.08 C = 50 N/C
To determine the direction of the electric field we can use the given information that the force exerted on the charge is 4 N to the right. The force on a positive charge due to an electric field is in the direction of the field, so the electric field is in the direction of the force, which is to the right.
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What are the x- and y-components of the velocity vector shown in the figure?
Part A
Express your answer with the appropriate units.
ANSWER: vx =
Part B
Express your answer with the appropriate units.
ANSWER: vy =
The x- and y-components of the velocity vector shown in the figure are -50m/s and -86.6m/s respectively.
A velocity vector is defined as the rate of position change of an object. The magnitude of a velocity vector gives the speed of an object while the vector direction gives its direction. The horizontal velocity component (Vx) refers to the influence of the velocity in displacing the projectile horizontally. The vertical velocity component (Vy) refers to the influence of the velocity in displacing the projectile vertically.
The Vx = VcosƟ and Vy = VsinƟ where Ɵ is the angle between the velocity vector and x-axis
In the given case, V = -100m/s
Vx = VcosƟ = -100cos60 = -50 m/s
Vy = VsinƟ = -100sin60 = -86.6 m/s
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) identify the type of solar radiation that is absorbed by stratospheric ozone and describe one human health benefit that results from the absorption of this solar energy.
Radiation that has been absorbed is ultraviolet radiation. Lower incidences of skin cancer, eye damage, and sunburns are all benefits to human health.
What particular solar radiation is absorbed by stratospheric ozone?Ultraviolet (UV) energy from the sun is filtered by stratospheric ozone, a naturally occurring gas. Since it lessens the negative effects of ultraviolet (UV-B) light, this is commonly referred to as "good" ozone.
Ozone in the stratosphere absorbs which of the following?A fraction of the solar radiation is blocked from reaching the planet's surface by the ozone layer in the stratosphere. The UVB part of UV radiation is what it absorbs most significantly. The ultraviolet light known as UVB, which is produced by the sun and sunlamps, has a number of negative effects.
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True or False?
If the cart is moving on the positive x axis, the x-component of velocity must be positive.
The given statement is false, the cart is moving on the positive x axis, the x-component of velocity must be positive. The magnitude and the direction both define it.
What exactly is speed?The definition of velocity is the change in displacement with respect to time. Speed is a vector quantity. This element is time-based. The x and y components of velocity at any angle are determined.
Given both magnitude and direction, velocity is a vector quantity. The relationship between displacement and velocity is known as the velocity dependence.
The cartesian coordinate, however, specifies the displacement direction. In contrast to an object moving along a negative x-axis, the cart moves along a positive x-axis and has a positive velocity.
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A client completed 2 or more repetitions in the last 2 consecutive workouts. Which of the following indicates the client needs a load progression?Henneman's principleKarvonen formula2-for-2 ruleHarris-Benedict equation
The 2-for-2 rule indicates that the client needs a load progression.
According to the 2-for-2 rule, if a client completes 2 or more repetitions in the last 2 consecutive workouts for a given exercise, it is time to progress the load.
This means that the client is ready to increase the weight used in the exercise to continue to challenge their muscles and make progress.
Henneman's principle, Karvonen's formula, and Harris-Benedict's equation are not directly related to load progression. Henneman's principle is a principle that explains how the size of muscle fibers affects muscle strength and function.
The Karvonen formula is a method of calculating heart rate training zones based on the individual's maximum heart rate. The Harris-Benedict equation is a method used to estimate the number of calories an individual needs to consume each day to maintain their current weight.
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95/5 solder should be used; a.on the high side of the system b.on the low side of the system c.when there are extreme changes in pressures and temperatures d.always
On the low side of the system, 95/5 solder need to be utilized. Designed for use in plumbing systems where frequent and dramatic temperature fluctuations exist, solder is a tin-antimony wire solder.
What is the purpose of 95-5 solder?95/5 is a general-purpose solder used in situations where the use of solder containing lead is not allowed, such as when soldering copper and copper alloys and/or ferrous base alloys.
What components make up 95-5 solder?A proprietary lead-free alloy created especially for water supply lines is the Oatey 95/5 wire solder. It complies with the Safe Drinking Water Act's definition of "lead free" since it is made of 95% tin and 5% antimony. Its melting range is between 450 and 464 degrees Fahrenheit, and it cannot be used on metal.
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Going downhill a driver applies brakes to keep a constant speed. the potential energy of the car is decreasing while the kinetic energy is constant. explain where the energy is going
The energy from the potential energy of the car is converted into thermal energy (heat) due to the friction caused by the brakes, which slows down the car.
The kinetic energy of the car remains constant because the speed of the car is being maintained.
What is energy?Energy is seen as a quantifiable property in physics that may be transferred from an item to carry out work. Thus, we might characterize energy as the capacity to engage in any kind of physical action.
As a result, the simplest way to describe energy is as the capacity for work.
The energy conversions in the problem is as described
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The current through inductance L is given by I = I0 sin ω t .
Find an expression for the potential difference ΔVL across the inductor.
Express your answer in terms of the variables L , ω , I0 , and t
ΔVL =
The maximum voltage across the inductor is 0.20 V when L =63μH and f =500kHz . What is I0 ?
I0 =
The value of I0 is 0.0000316 A. The current through inductance L is given by I = I0 sin ω t
What is the relationship between inductance and the frequency of an alternating current?Inductance and frequency have an inverse relationship, meaning that as the frequency of an alternating current increases, the inductance decreases and vice versa. This is because an inductor opposes changes in current, and as the frequency of the current increases, the rate of change in current also increases, making the inductor's opposition stronger.
The potential difference across an inductor is given by the derivative of the flux linkage concerning time. Since the flux linkage is given by Li, we have:
ΔVL = L dI/dt
Substituting the given expression for I:
ΔVL = L d/dt(I0 sin ωt)
= L I0 ω cos ωt
To find the maximum voltage across the inductor, we can take the derivative of this expression with respect to time and set it equal to zero:
d/dt(L I0 ω cos ωt) = 0
Since the cosine function has a maximum value of 1 at t = (2n+1)π/ω for any integer n, we can use this to find the maximum voltage:
L I0 ω = 0.2V
Given L = 63μH and f = 500kHz, we can find the angular frequency:
ω = 2πf = 2π(500 x 10^3) = 3.14 x 10^6
So,
I0 = 0.2V / (63 x 10^-6H * 3.14 x 10^6) = 0.0000316 A
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how much work is done during this part of its motion by the cable that lifts the elevator? neglect any friction.
The work done is 9075 Nm .
Work in physics is the energy that is transferred to or from an item when a force is applied along a displacement. For a constant force acting in the same direction as the motion, the work is simply equal to the product of the force's magnitude and the distance traveled.
Work done = Force × Distance
⇒ Force = Mass × Acceleration
⇒ Work done = Mass × Acceleration × Distance
⇒ work done = 550kg × 1.5m/s2 × 11m
work done = 9075 Nm
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Complete Question -
A 550kg elevator accelerates upward at 1.5m/s2 for the first 11m of its motion.
How much work is done during this part of its motion by the cable that lifts the elevator? Neglect any friction.
Which form of heat transfer occurs through fluid motions?
"The type of heat transfer that occurs through fluid motions is known as convection."
Convection, which is the extensive movement of molecules within gases and liquids, is the mechanism through which heat is transported. Conduction is used to move heat from the object to the fluid initially, but fluid motion is responsible for the bulk of the heat transfer.
Forced convection is the term for the movement of fluid caused by an external source (such as a fan, blower, etc.), while natural or free convection refers to the movement of fluid that occurs naturally. This type of heat transfer occurs only when the fluid is in motion.
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when the three blocks in the figure below are released from rest, they accelerate with a magnitude of 0.525 m/s2. block 1 has mass m, block 2 has 6m, and block 3 has 6m. what is the coefficient of kinetic friction between block 2 and the table?
If an automobile accelerates at a rate od a=2m/s2 a = 2, m/s2, it means that its velocity is changing at a rate of v=2m/s v = 2 m/s every second. It simply describes how the car's velocity relates to the car's own velocity.
What is the lower block's acceleration?We suppose that one block moves together to the right and left evenly in order to calculate the velocity of the bottom block. so, The velocity to the bottom block is twice that of the upper block when Newton's second law is simplified for both the upper and lower blocks together.
A block formula is what?The Calculator block evaluates an equation specified by the user and outputs the evaluation's outcome as a True/False, a number, or an output of an instrument type. Every time one of the connectors mentioned in the block's internal formula changes, the block calculates the total and outputs its value.
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1. a bus is driving along a straight stretch of road. the bus driver, named ray, has
a cup of water resting on the dashboard. suddenly ray has to slam on the brakes.
part 1: what is most likely to happen to the water in the cup? part 2:using your
knowledge of newton's laws of motion explain why this will happen. please be
sure to answer both parts of the question.
Due to the inertia of motion, this will happen. Water continues to travel because of inertia while the bus and cup come to stop as a result. As a result, water continues to move and spills.
What exactly is the inertia of motion, for instance?The resistance a body offers to continue moving uniformly unless another force acts on it is known as the inertia of motion. For instance, when a moving bus suddenly stops, the passengers slump forward because of the inertia of motion.
Who defined Newton's first, second, and third laws of motion?According to the first law, a force must be applied to an object before it may affect its motion. According to the second law, an object experiences a force equal to its mass times its acceleration. According to the third law, when two things interact, they exert forces on one another that are both equal in strength and directed in the opposite direction.
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the coefficient of static friction between teflon and scrambled eggs is about 0.030. what is the smallest angle from the horizontal that will cause the eggs to slide across the bottom of a teflon-coated skillet?
The smallest angle of friction that will cause a to slip on a scrambled egg will be 1.43.
What is a straightforward definition of friction?When two bodies in contact move in relation to one another, friction, a resistive force, arises. friction factors Between-body surface adhesion: When two materials are in close proximity to one another, a molecular force called adhesion is created.
The coefficient of static friction between
Teflon and scrambled eggs μ = 0.025
if the angle required angle is θ then
μ = tan θ
θ = tan inverse ( μ )
= tan -1 ( 0.025 )
=1.43 degrees.
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to an order of magnitude, how many piano tuners reside in new york city? the physicist enrico fermi was famous for asking questions like this one on oral ph.d. qualifying examinations.
It is estimated that there are about 500-1000 piano tuners in New York City.
What is estimation?Estimation is the process of predicting an approximate value based on available data. It is used in a wide range of fields, such as engineering, economics, statistics, and business. Estimation involves making a judgment based on available information and using methods to calculate an approximate value. Estimation is important in many different situations, such as predicting the potential cost of a project or forecasting an expected outcome of a decision. Estimations can also be used to identify trends and prepare forecasts. Estimation involves analyzing data and considering different factors to make a reasonable prediction. This process can help organizations make informed decisions and take appropriate action.
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It is estimated that there are about 500-1000 piano tuners in New York City.
What is magnitude?Magnitude in physics is simply described as "distance or amount." It shows how an item moves while it is in motion, whether that movement is absolute, relative, or of a certain magnitude. It is used to describe the scope or magnitude of something. Magnitude is a broad term used in physics to describe size or distance. The contrast between the speeds of an automobile and a bicycle, for instance, may be explained using the magnitude. Additionally, it may be used to describe the length a certain thing has traveled or the magnitude of an object's quantity.
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A 400 Kg car has 1.8 x 10^5 J of kinetic energy. How fast is it moving?
Explanation:
[tex]e = \frac{1}{2} m {v}^{2} \\ 1.8 \times {10}^{5} = (400\div 2) {v}^{2} \\ v = \sqrt{1.8 \times {10}^{5} \div (400 \div 2)} [/tex]
How much time does a car with an acceleration of 2 m/s2 take to go from 10 m/s to 30 m/s?
Answer: 10 seconds for the car to go from a velocity of 10 m/s to 30 m/s with an acceleration of 2 m/s^2.
Explanation:
To calculate the time it takes for a car with an acceleration of 2 m/s^2 to go from a velocity of 10 m/s to a velocity of 30 m/s, we can use the equation:
time = (final velocity - initial velocity) / acceleration
In this case:
time = (30 m/s - 10 m/s) / 2 m/s^2
time = 20 m/s / 2 m/s^2
time = 10 s
Therefore, it takes 10 seconds for the car to go from a velocity of 10 m/s to 30 m/s with an acceleration of 2 m/s^2.
during an automobile crash test, the average force exerted by a solid wall on a 2,200 kg car that hits the wall is measured to be 140,000 n over a 0.12 s time interval. what was the initial speed of the car (in m/s) prior to the collision, assuming the car is at rest at the end of the time interval?
Based on the question posed during a vehicle crash test The vehicle's pre-collision speed is 7.63 meters a second.
What do starting and final velocity mean?When gravity first exerts force on an item, its initial velocity indicates how quickly the thing moves. The total momentum, on the other hand, is a vector number that gauges a traveling body's speed and direction after it has attained its utilize high.
Force exerted on the wall, F = 140,000 N
time of contact, t = 0.12 s
final speed of the car = 0 m/s
initial speed of the car = ?
we know,
Impulse is equal to change in momentum
J = m v- mu
J = 2200 x 0 - 2200 x (-u)
J = 2200 u
impulse is also equal to force into time
J = F x t
equating both equation of impulse
2200u = F x t
2200 u = 140000 x 0.12
2200 u = 16800
u = 7.63 m/s
Speed of the car before collision is equal to 7.63 m/s
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Scout feels ill one day before school. Her mother puts a thermometer in her mouth and the temperature begins to climb to 100°F. What is happening between the cooler thermometer and Scout's body? A) Scout's body is applying a force to the particles in the thermometer. B) Kinetic energy is being transferred from her mouth to the thermometer. C) Potential energy is being lost by the thermometer and gained by Scout's body. D) The potential energy stored in foods is converted to mechanical energy to raise the mercury in the thermometer
Kinetic energy is being transferred from her mouth to the thermometer.
When Scout feels ill and her mother uses a thermometer, her body temperature is being measured. The thermometer contains mercury, which is a liquid at room temperature.
When Scout's body temperature is higher than the thermometer, kinetic energy is transferred from her body to the thermometer. This causes the mercury to expand and rise in the thermometer, indicating an increase in body temperature.
This type of thermometer works on the principle of thermoelectric expansion, where the temperature of a substance is determined by measuring the change in its length or volume due to a change in temperature.
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Consider an ideal spring that has an unstretched length l_0. Assume the spring has a constant k. Suppose the spring is attached to an cart of mass m that lies on a frictionless plane that is inclined by an angle theta from the horizontal. Let g denote the gravitational constant The given quantities in this problem are l_0, m, k, theta, and g. a) The spring stretches slightly to a new length l>l_0 to hold the cart in equilibrium. Find the length l in terms of the given quantities. b) Now move the cart up along the ramp so that the spring is compressed a distance x from the unstretched length l_0. Then the cart is released from rest What is the velocity of the cart when the spring has first returned to its unstretched length l_0? c) What is the period of oscillation of the cart?
The length of the spring in equilibrium is l = l0 +(mgsin(theta)/k in terms of the given quantities
a) The length of the spring in equilibrium can be calculated using the spring's force equation, F = -k(l-l0).The force exerted by gravity on the cart is mgsin (theta), which must be equal to the force exerted by the spring in order to achieve equilibrium. Setting these two forces equal to each other and solving for l gives:
l = l0 +(mgsin(theta)/k
b) When the cart is released from rest, it will have potential energy stored in the spring. This potential energy can be converted into kinetic energy as the spring expands. The velocity of the cart when the spring has first returned to its unstretched length can be found using the conservation of energy. The potential energy stored in the spring when the cart is released is (1÷2) kx2, and the kinetic energy at the point when the spring returns to its unstretched length is (1÷2) mv². Setting these two equal to each other and solving for v gives:
sqrt(2kx÷m) = v
c) The period of oscillation of the cart is the time it takes for the cart to complete one full oscillation. T = 2pisqrt(m/k) can be used to calculate it.
2pisqrt(m÷k) = T
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a particle moves along the x-axis in such a way that its velocity when it as the point x on the axis is equal to (so, for example, when it at 2 on the axis, it's velocity is 4 units/second to the right, etc.) That is: True or false (include an explanation): Is a(t) the acceleration of the particle, equal to 2
When a particle moves along the x-axis, it does so in such a way that its velocity at point x on the axis equals (for instance, when the particle is at point 2 on the axis, its velocity is 4 units/second to the right, etc.). That's accurate.
What is called velocity?The movement of an object and particle in space-time is represented by its vectorial form as velocity. The metre / second (m/s) is the accepted unit of magnitude for velocity (also known as speed). Centimeters per second (cm/s) can also be used to measure speed. The velocity of an item, which is the direction it is moving in, is the rate at which its location changes when seen from a certain angle and as expressed by a given time unit (for example, 60 km/h northbound).
What is velocity in physics?Velocity must have a specific magnitude and direction to qualify as a physical vector quantity. Speed is a coherently derived unit, and in the SI, its amount is expressed in metres per second (m/s or ms1). Speed is the magnitude (scalar absolute value) of velocity (metric system). A vector travels at 5 m/s.
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particles on an x axis: q 3.20 1019 c at x 3.00 m and q 3.20 1019 c at x 3.00 m. what are the (a) magnitude and (b) direction (relative to the positive direction of the x axis)
The magnitude of the charged particles will be 1.38 x 10-10N/C
A charged particle in physics is a particle that has an electric charge. It might be an ion, such as a molecule or atom having an excess or shortage of electrons in comparison to protons. It could also be an elementary particle like as an electron, proton, or another one that is thought to have the same charge (except antimatter).
By symmetry, the vertical components of each field (caused by the two charges) cancel.
When d and y are set to 3 and 4 meters, respectively, the horizontal components (both pointing in the direction of -x) sum up to a magnitude of
Ex.net = 2lqld 4лε (d² +y²)³/2
2(8.99 × 10°N.m²/C²)(3.20 × 10-19℃)(3.00 m) [(3.00 m)2 + (4.00 m)2] 3/2
= 1.38 x 10-10N/C.
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A 1.0-cm tall object is 60 cm in front of a diverging lens that has a -30 cm focal length.
a) Use ray tracing to find the position and height of the image. To do this accurately, use a ruler or paper with a grid. Determine the image distance and image height by making measurements on your diagram.
b) Calculate the image position and height using the thin lens and magnification equations. Compare with your ray-tracing answers in a).
given
h = 1.0 cm
object distance, u = 60 cm
focal length, f = -30 cm
let v is the image distance.
a) Ray diagram
(image below the answer)
b)
use, 1/u + 1/v = 1/f
1/v = 1/f - 1/u
1/v = 1/(-30) - 1/60
v = -20 cm (image distance)
magnification, m -v/u
= -(-20)/60
= 0.333
image height = m*object height
= 0.33*1
= 0.33 cm
What is ray tracing?
Ray tracing is a rendering technique used in 3D computer graphics to create detailed and realistic images. It works by tracing the path of light from the eye of the viewer through each pixel in the image and calculating the color of the pixel based on the objects in the scene and their interaction with that light. Ray tracing can produce highly realistic images, including reflections, refractions, and shadows, while also providing a level of accuracy and speed not possible with traditional rendering methods.
Therefore, the image distance is -20 cm and image height is 0.33 cm
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if a clay boat weighs .005 kg and is flisting, what is the upward force the water is exerting on the boat?
Answer: Force = 0.05N
Explanation: As the clay boat is floating therefore the upward force that the water is exerting on boat is equal to the weight of the boat, so they remain in vertical equilibrium⇒ net downward force = net upward force.
Mass of the boat (M) = 0.005 kg
Gravitational acceleration = 10 m/[tex]s^{2}[/tex]
Upward force = Weight of the boat = M×g = 0.005× 10 = 0.05 N
a 1200 kilogram car traveling at 10 meters per second hits a tree and is brought to rest in 0.10 second. what is the magnitude of the average force pdf
The magnitude of the average force is 120,000 N.
Describe force.A factor is an effect that has the power to alter an object's motion. An object with mass can change its velocity, or accelerate, as a result of a force. An obvious way to describe force is as a push or even a pull. A force is a vector quantity since it has either magnitude and direction.
Determine the car's acceleration when it is stopping: take the car in the + direction
v = u + at
0 = 10m/s + a*0.1
0.1a = -10m/s
a = -1000 m/s^2
a = 100m/s^2 in opposite direction to direction of car
F = m*a
F = 1200kg * -100m/s^2
F = -120,000 N
Force = 120,000 N in opposite direction to direction of car
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based on these units, select any of the following expressions that could be valid expressions?
Hint 1. Consistent units The left-hand side and the right-hand side of any equation must have the same units. For example, only a quantity measured in meters can be equal to another quantity measured in meters. Just as you can't compare apples and oranges, you can't compare meters and seconds. To see it an equation is consistent, substitute in the units of all of the terms in the equation. If the two sides of the equation have the same units, the equation may express some valid physical relationship
o v=a/t
o t=3√d2/va
o d=at
o a=d/t2
o a=√vd/t3
o v=at
Yes, that is correct. Consistent units in an equation ensure that the equation expresses a valid physical relationship by ensuring that the units of measurement , the equation is considered consistent and may express a valid physical relationship.
Consistent units refers to the requirement that the units of measurement on both sides of an equation must be the same. This ensures that the equation expresses a valid physical relationship. In the examples provided, v=a/t, t=3√d2/va, d=at, a=d/t2, a=√vd/t3, and v=at all have consistent units, as the units on both sides of the equation are the same.
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A charge 4.98 nC is placed at the origin of an xy-coordinate system, and a charge -2.04 nC is placed on the positive x-axis at x = 4.02 cm . A third particle, of charge 5.99 nC is now placed at the point x 4.02 cm , y 2.98 cm.
Find the x-component of the total force exerted on the third charge by the other two
From the horizontal x-axis, the force acts in a direction that is roughly 33.5 degrees clockwise.
What does "charge" mean in the context of electricity?Some elementary particles have an electric charge, which is a fundamental property of matter that governs how an electric or magnetic field affects the particles. Electric charge can neither be created nor destroyed; it only exists in specific natural units.
How can we determined this?The x-component of the total force on the third charge can be found using Coulomb's Law, which states that the force between two charges is given by:
F = (k * q1 * q2) / r^2
where F is the force, k is the Coulomb constant, q1 and q2 are the charges, and r is the distance between the charges.
To find the x-component of the force, we need to calculate the force due to each of the other two charges separately and then add them together.
The force due to the charge at the origin is:
F1 = (k * 4.98 nC * 5.99 nC) / (sqrt((4.02 cm)^2 + (2.98 cm)^2))^2
The force due to the charge on the x-axis is:
F2 = (k * (-2.04 nC) * 5.99 nC) / (4.02 cm)^2
The x-component of the total force is the sum of the x-components of these two forces. As the charge at the origin is at the origin, it does not have any x-component. The x-component of the force due to the charge on the x-axis is just the force due to that charge, since it is acting in the positive x-direction.
So, the x-component of the total force exerted on the third charge is:
F_x = F2 = (k * (-2.04 nC) * 5.99 nC) / (4.02 cm)^2
The Coulomb constant k = 8.99 * 10^9 N*m^2/C^2
Now, plug in the value of k and find the x-component of the force.
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Classify the characteristics as qualities of either acids or bases. acid base dissolves some metals ITI sour flavor turns litmus paper blue turns litmus paper red bitter flavor feels slippery
The acids are sour flavour, dissolves some metals and turns litmus paper red.
The bases are bitter flavour, feels slippery and turns litmus paper to blue.
What is acid and base?The German word for acid, sauer, describes its sour flavour. Since hydrochloric acid, which is used to digest food, can harm cells, our stomachs require a special lining to shield it from this acid. Acids are something we're all familiar with; they're present in tomatoes, citrus fruits, and vinegar. There are numerous varieties of salts in chemistry, and acids react with most metals, including magnesium, to produce hydrogen gas.
When two substances come into contact, corrosive substances will cause a chemical reaction that will damage or destroy the other substances.
On contact, bases feel slick. This is due to their ability to alter protein structure. Because it begins to harm the proteins in your skin, a strong base can result in severe chemical burns.
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A 500 N fruit cellar runs up a flight of stairs, 15 M high, and 14 seconds. Calculate the power generated by the fruit seller. Round to one decimal.
Answer:
Explanation:
The power is calculated by the equation Power = Work/Time.
Work = Force x Distance
Work = 500 N x 15 m = 7500 Nm
Time = 14 seconds
Power = 7500 Nm/14 s = 535.7 W (rounded to one decimal).
If you wear kneepads when skating, after a fall to your knees it will take 3 times as long for them to come to rest. How does this affect the force applied to your knees when you fall?
The way that this will affect the force applied to your knees when you fall is option C. The force decreases by a factor of 3.
What is the kneepads aboutWhen the duration of the impact is increased, the force applied to your knees is spread out over a longer period of time, which can reduce the peak force experienced during the fall. This means that the kneepads can help to reduce the maximum force applied to your knees during a fall.
Note that even though the duration of the force applied is longer, the energy absorbed by the knee pads is the same, as energy is the product of force and distance.
Thus, the knee pads will still be able to absorb the same amount of energy, but will be able to dissipate it over a longer period of time, reducing the peak force applied and ultimately decreasing the force by a factor of 3.
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See transcribed text below
If you wear kneepads when skating, after a fall to your knees it will take 3 times as long for them to come to rest. How does this affect the force applied to your knees when you fall?
A. The force does not change.
B. The force increases by a factor of 3.
OC. The force decreases by a factor of 3.
OD. The force decreases by a factor of 9.
a child is sliding down a hill with a velocity of zero, and 3 seconds later he is speeding down the hill at 12 meters per second. what is the child's acceleration?
The acceleration of the child is 4 m/s², if the initial velocity of the child is zero and velocity after 3 second is 12 m/sec.
Starting velocity of the child, u = 0
Final velocity of the child, v = 12 m/s
Let the acceleration = a
Time taken to achieve final velocity, t = 3 seconds
First equation of motion describes the relation between the uniform velocity(u), final velocity(v), accelerartion(a) and the time(t).
v = u + at
12 = 0 + a× 3
a = 12/3
a = 4 m/sec²
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a box of mass 5.60 kg is accelerated from rest by a force across a floor at a rate of 2.00 m/s2 for 9.00 s. find the net work done (in j) on the box.
A force along a floor accelerates a box weighting 5.0 kg from rest; the net work performed on the box is 490 Nm.
What is the equation for when work is completed?The effort W is approximately the force f × the radius d, or W = fd, to mathematically describe this idea. The work is W = fd cos if the force is applied at an angle to the displacement.
The net work formula is what?The definition of net work is the total amount of work produced by all external forces, or more specifically, the work produced by the unbalanced force Fnet. Wnet=Fnetdcos is the equation for this, where is the angle formed by the linear velocity and the displacing vector.
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