Answer:
The frequency will be higher, meaning the wavelength will be shorter.
Answer:
higher frequency; shorter wavelength
Explanation:
As we know that by Doppler's effect of sound we have a formula of apparent frequency observed by stationary observer when source is coming closer to it is given by
[tex]f_{app} = f_o(\frac{v}{v- v_s})[/tex]
now when source will come closer to stationary observer than the apparent frequency observed by the observer will be greater than the actual frequency heard by the driver
now we also know that the formula for wavelength is given by
[tex]\lambda = \frac{speed}{frequency}[/tex]
so here the wavelength will be smaller by that observer as frequency will be more.
so correct answer will be
higher frequency; shorter wavelength
which is true of magnetic field lines, but not electric field lines
A) they are not affected by their own source
B) they show which way iron shavings would align themselves
C) they re stronger near the source and get weaker farther away
D0 the closer the fields lines, the stronger the fields
Answer:
B) they show which way iron shavings would align themselves
Explanation:
Let's analyze each statement:
A) they are not affected by their own source --> this is true for both magnetic and electric fields. In fact, both fields are produced (and so affected) by a source (a magnet or a current in the magnetic field case, and an electric charge in the electric field case)
B) they show which way iron shavings would align themselves --> this is only true for the magnetic field. In fact, the pieces of iron will align according to the magnetic field; however, since they are electrically neutral, they are not affected at all by an electric field.
C) they re stronger near the source and get weaker farther away --> true for both magnetic and electric fields.
D) the closer the fields lines, the stronger the fields --> also true for both magnetic and electric fields.
So, the correct answer is B.
Answer:
B) they show which way iron shavings would align themselves
Explanation:
Both a fire blanket and the spray from a fire extinguisher put out a fire by pressing down on the fire and pushing any oxygen away. When there is no oxygen, the fire stops. Sometimes it is safe to pour water on a fire to put it out, but if a fire is ever caused by electrical energy, water will spread the fire.
With this in mind, what most likely explains why it is important to make sure hands are dry before working with any scientific electrical equipment?
Fires are started by water.
Germs should not be electrified.
Water can carry electricity.
Wet fire blankets will not work.
Answer:
Water can carry electricity
Explanation:
While pure water does not conduct electricity, ionized water does. It is common that water is ionized than is pure, unless it is purified. The dissolved ions in the water are what makes the water conduct electricity. Handling electric equipment with wet hands may lead to electrocution.
Answer: C.) Water can carry electricity.
Explanation:
Which statement does Einstein's theory promote about space and time?
O
O
O
O
Time, space, and the speed of light depend on reference frames.
Time and space depend on reference frames, but the speed of light does not.
The speeds of light and space depend on reference frames, but time does not.
The speeds of light and time depend on reference frames, but space does not.
Answer:
2nd statement would be the right answer
Answer: Time and space depend on reference frames, but the speed of light does not.
Explanation: According to Einstein Space and Time are directly related as the way we sense them, in his words space and time is like a fabric in which we cannot affect one without affecting the other as we interact with it, time can be stretched and squeezed depending on your inertial frame of reference (constant speed and mass). However light can travel thru the fabric of space and time and it does not get affected by any reference keeping always the same speed.
Kinetic energy is measured in units of
If the mass has units of kilograms and the velocity of meters per second, the kinetic energy has units of kilograms-meters squared per second squared.
Kinetic energy is usually measured in units of Joules (J); one Joule is equal to 1 kg m2 / s2.
Kinetic energy is the energy of motion and is measured in Joules (J), which equates to kg · m²/s² in SI units. This is because it represents the same physical property as work and energy in physics.
Explanation:Kinetic energy is measured in units of joules (J), which are also the units for work and energy. This is because kinetic energy, the energy of motion, is related to the work done on an object and is a form of energy. The joule is defined as 1 kg · m²/s² in standard SI units, meaning it represents the amount of kinetic energy held by an object with a mass of 2 kilograms, moving with a velocity of 1 meter per second.
Historically, energy was measured in units of calories, but the SI unit of heat, work, and energy is the joule. One Joule is equivalent to 1 kg m²/s², which is also called 1 newton-meter. To standardize its definition, 1 calorie has been set to equal 4.184 joules.
The kinetic energy of an object can be calculated by the equation KE = 1/2mv², where 'm' is the mass of the object and 'v' is its velocity. This equation demonstrates that kinetic energy is proportional to the square of an object's speed, highlighting the relationship between energy, mass, and motion.
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The case of Plessy v. Ferguson, which affirmed the system of segregation, was subsequently overturned in which of the cases listed below?
Select one:
A. Tinker v. Des Moines
B. District of Columbia v.Heller
C. Marbury v. Madison
D. Brown v. Board of Education
brown v board of ed
becasue i remember trust me
Answer: BROWN V BOARD OF EDUCATION.
…Court in the case of Plessy v. Ferguson established the doctrine of “separate but equal.”…. Jim Crow law. …1954 the Supreme Court reversed Plessy in Brown v. Board of Education of Topeka. It declared segregation in public schools unconstitutional, and, by extension, that ruling was applied to other public facilities.
Explanation:
Witch sentence states Newton third law
Answer:
option b
Explanation:
if two object collide each object exerts a force equat to and in the opposite direction each other
A wheel is rotating at a rate of 2.0 rev every 3.0s. through what angle, in radian , does the wheel rotate in 1.0s?
Answer:
[tex]4 \pi[/tex]
Explanation:
First of all, let's convert 2.0 rev into radians:
[tex]1.0 rev = 2\pi rad\\2.0 rev = 4 \pi rad[/tex]
This means that the angular speed of the wheel is
[tex]\omega = 2.0 rev/s = 4 \pi rad/s[/tex]
The angle through which the wheel rotates in a time t is given by
[tex]\theta=\omega t[/tex]
And substituting t=1.0 s, we find
[tex]\theta=(4\pi rad/s)(1.0 s)=4 \pi rad[/tex]
Application of a biot-savart law
can be used to determines the expression for magnetic field strength of a current element
The Biot-Savart law is important for calculating magnetic fields from current loops but can be complex and time-consuming. It requires the use of cross-products and integration along the current-carrying wire. When symmetry exists, Ampère's law might offer a simpler solution.
Explanation:One advantage of the Biot-Savart law is its ability to calculate the magnetic field produced by any current loop configuration, offering versatility in physics problems. A disadvantage is that it can be complex and time-consuming, particularly when dealing with intricate geometries where symmetry is lacking. When approaching a problem, if there is symmetry, one may consider Ampère's law as an alternative for simplifying calculations especially when a clear path of integration is present.
To apply the Biot-Savart law, it is necessary to define the current element dI and unit vector r, calculate their cross-product, and integrate this across the length of the current-carrying wire. This allows determination of the magnetic field's magnitude and direction. In specific setups, such as calculating the magnetic field of an infinite wire, the desired precision dictates certain assumptions like treating finite segments as effectively infinite when they align closely with the wire's length.
Overall, the Biot-Savart law provides a powerful tool for understanding how current-carrying wires influence the magnetic fields in their vicinity, which is a foundational concept in electromagnetism.
Which statement describes the purpose of forming the North Atlantic Treaty Organization
A. To provide collective defense against the threat of aggression from the Soviet Union and its allies.
The primary purpose of forming the North Atlantic Treaty Organization (NATO) was to provide a collective defense against the threat of aggression from the Soviet Union and its allies during the Cold War era.
Established in 1949, NATO aimed to ensure the security and stability of its member states in the North Atlantic region by promoting military cooperation and mutual defense.
The organization facilitated strategic alliances, joint military exercises, and intelligence sharing among member countries to deter potential aggression and preserve peace in the region.
NATO's formation represented a commitment by member states to support each other in the event of an attack, thereby serving as a cornerstone of transatlantic security and stability during the Cold War period and beyond.
The probable question may be:
Which statement describes the purpose of forming the North Atlantic Treaty Organization
A. To provide collective defense against the threat of aggression from the Soviet Union and its allies.
B. To promote economic cooperation among North Atlantic countries.
C. To establish a military alliance for global peacekeeping missions.
D. To coordinate efforts for environmental conservation in the North Atlantic region.
Please tell me the order the answers go. Best and most correct answer gets Brainliest.
See the attached picture:
In young’s experiment how must waves be vibrating to for interference to occur
A. Out of line
B. In line
C. In phase
D. Out of ohase
In phase for constructive interference and out of phase for destructive
which best describes how the sun rotates?
Answer:
The sun rotates more slowly at its poles.
Answer:
The sun rotates more slowly at its poles.
what are most elements on the periodic table?
Answer:
Metals, nonmetals and metalloids.
Explanation:
Answer:
Is metals, Non metals, Metalloids
The periodic table on the left separates elements into three groups : the metals (green in the table), nonmetal (orange), and metalloids (blue) . most elements are metal. they are usually shiny,very dense , and only melt at high temperatures .
A car headed north at 15m/s experiences an acceleration of 2.5 m/s2 for 3 s. What is the final velocity of the car
Answer:
= 22.5 m/s
Explanation:
The acceleration of a moving body is calculated by the formula;
a = (v-u)/t
Where; a is the acceleration of the body
v is the final velocity of the body
u is the initial velocity of the body and
t is the time taken
In this case;
u = 15 m/s
a = 2.5 m/s²
t = 3 seconds
2.5 m/s² = ( v- 15 m/s)/3 seconds
2.5 × 3 = v - 15
7.5 = v - 15
v = 7.5 + 15
= 22.5 m/s
Entropy can only be decreased in a system if ...
a)heat is removed
b)disorder is increased
c)energy is added
d)efficiency is zero
ANSWER FAST PLEASEEEEEE
Answer:
a)heat is removed
Explanation:
Entropy is the a stare of randomness or disorderliness of the particles of a system.
The entropic level of a system depends on temperature and physical state of matter.
With increasing temperature, the randomness of the particles of a system increases. When heat is removed from a system, the entropy reduces and orderliness is approached. For example, the entropy of steam would decrease if we place it in a refrigerator. In the refrigerator, work is done on the steam to remove the heat and reduce the temperature. The vapour moves from gas to liquid and then to a more ordered ice.
When disorder increases, entropy increases also.
When we add more energy to a system, it causes a rise in randomness.
Answer:
it is not a) heat is removed
Explanation:
just got it wrong because of the previous reply :(
An atomic nucleus is composed of A) protons. B) protons and neutrons. C) protons and electrons. D) protons, neutrons, and electrons.
Answer:
B
Explanation:
The nucleus is made up of protons and neutrons, and electrons float around the neucleus in the electron cloud.
The atomic nucleus is made up of two particles that are protons and neutrons.
Answer: Option B.
Explanation:
The atom has the core part as the nucleus in the center part of the atom. The nucleus consists of two particles. These are namely, protons and neutrons.
Proton contains a positive charge but whereas the neutron does not have any charges; therefore, the nucleus acquires the positive charge of the proton. Both of them together constitute the atomic mass and the mass number.
Explain how the sun's position in the sky affects the length of shadows
ps.multiple sentences, please
A shadow forms on the side of an object that faces away from the sun. The length of shadows changes as Earth rotates. In the morning, the sun is low in the eastern sky and shadows are long. As time passes in the morning, the sun seems to move higher in the sky.
The size of the object changes with change in the position of the light source.The length of the shadow of the object decreases as the sun position changes from down to top in the sky.
SunlightSunlight has the sun rays. This rays travel to the earth. When the sun rays reach to earth they hit the object comes in his way. If the sun rays hit the opaque body ( a body that absorb some light when light fall on it) the light can not pass through them and the shadow appears.
What is the affect pf sun's position on the length of shadows?The shape of a object determine the shape of the shadow made by him but the size of the object does not depends on the size of the object.
The size of the object changes with change in the position of the light source.The shadow appears in the opposite direction from where the sunlight falls on body.
At the outdoor, when there is sun in the sky, the size of the shadow is different at different sun position on the sky.
At the time of morning the sun is in the east direction low level at sky. At this position the sun rays passes through the objects vertically. It results in the long shadow of the object in the west direction.At the time of noon the sun is at top of the sky. The sun rays fall on a object vertically. The shadow made by the object is smaller or nothing as the opposite surface is grounded. Thus in the noon time the shadow length is smaller.At the time of evening the sun is again down in the sky. The sun rays falls vertically, Hence the shadows made by the object is longer and in the east direction.Hence the length of the shadow of the object decreases as the sun position changes from down to top in the sky.
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Which best describes a material with a low index of refraction (near 1)?
A. It causes light to refract significantly.
B. The speed of light stays constant.
C. Is causes light to slow and refract very little.
D. Light is mostly reflected at a value near 1.
it causes light to slow and refract very little
Answer:
it causes light to slow and refract very little
Explanation:
its on my test
Dimension formula of under root LC
The square root of LC has the dimension of time. Its reciprocal is frequency.
The dimension of under root LC is calculated by taking square root of the multiplication of the dimensions of L (Inductance) and C (Capacitance). Using the dimensions of L as [M][L][T]-2 [I]-2 and C as [M]-1 [L]-2 [T]4 [I]2, the dimension of under root LC is [M]-1/2 [L]-1 [T]2 [I].
Explanation:The question asks for the dimension of under root LC where L is Inductance and C is Capacitance. Both of these are primary physical quantities where the dimension of L is [M][L][T]-2 [I]-2 and the dimension of C is [M]-1 [L]-2 [T]4 [I]2. To find the dimension for under root LC, we can square root the multiplication of the dimensions of L and C, which means that the dimension of under root LC is [M]-1/2 [L]-1 [T]2 [I].
Here, M stands for mass, L for length, T for Time, and I for Current.
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Which hand is negatively charged
Answer:
Its B. I got it from my question that I asked.
Explanation:
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This is the person is the one that answered it right mlboeckel26
Answer: The right hand rule is a way to predict the direction of a force in a magnetic field. To predict the behavior of positive charges, use your right hand. To predict the behavior of negative charges, use your left hand.
Explanation: If your thumb points in the direction of the velocity and your fingers point in the direction of the magnetic field, your palm points in the direction of the force.
What is another name for the surface of the sun?
Answer: Chromosphere hope this helps :)
Which statement best describes the relationship between work and energy?
Work is the mechanism by which energy is transferred or changed in an object, described by the work-energy theorem. Work done on an object equals the change in kinetic energy, demonstrating the intimate relationship between work and energy, and can be calculated using the formula W = Fd*cos(θ). Energy is defined as the ability to do work, connecting it intrinsically to the concept of work.
The Relationship Between Work and Energy
The statement that best describes the relationship between work and energy is that work is the means through which energy is transferred or transformed from one body or system to another. When work is done on an object by applying a force over a distance, the energy of the object changes. This can be in the form of kinetic energy, which is the energy of motion, or potential energy, which is stored energy due to position or composition. The work done on an object is equal to the change in kinetic energy of the object, which is a concept known as the work-energy theorem.
In mechanical terms, work (W) can be expressed as the product of the force (F) in the direction of displacement times the distance (d) the object moves while the force is applied: W = Fd*cos(θ), where θ is the angle between the force vector and the displacement vector. Work and energy are measurable in the same units, Joules (J), underscoring their close relationship.
In essence, energy is defined as the capacity to do work. Therefore, understanding work is essential to grasping how energy is transferred or conserved within a system. In terms of conservation, the first law of thermodynamics states that the total internal energy change in a system is equal to the heat added to the system minus the work the system performs. Thus, the concept of work serves as a fundamental bridge between force interactions and energy changes in physical systems.
What basic parts does a circuit need?
Answer:
Every electric circuit, regardless of where it is or how large or small it is, has four basic parts: an energy source (AC or DC), a conductor (wire), an electrical load (device), and at least one controller (switch).
Explanation:
Cell (battery)
Wires
Bulb or motor
can someone pls answer number 8 for me pls
Answer:
1.33 m
Explanation:
Tom weighs 600 N and is 2 meters from the pivot. So his moment is:
τ = Fr
τ = (600 N) (2 m)
τ = 1200 Nm
To balance the see-saw, Jeremy must create an equal and opposite moment.
τ = Fr
1200 Nm = (900 N) r
r = 1.33 m
So Jeremy must sit 1.33 m from the pivot on the other side.
A 2.5-kg rock is dropped
Answer:
Okay it dropped now what..........................................
Explanation:
Is the rock okay I’m concerned
A car is traveling with a velocity of 40 m/s and has a mass of 1120 kg. The car has —— energy. Calculate it
Answer:
A car is traveling with a velocity of 40 m/s and has a mass of 1120 kg. The car has Kinetic energy.
kinetic energy = 896000 joules
Explanation:
Kinetic energy is an energy a mass of body possess by reason of it motion. Kinetic energy depends on the mass and speed of a body . Kinetic energy is a scalar quantity, this means it has only magnitude but no direction.
Since the car is on motion the energy the car possess is a kinetic energy. Kinetic energy can be calculated using the formula below.
kinetic energy = 1/2 × mass × velocity²
kinetic energy = 1/2mv²
m = 1120 kg
v = 40 m/s
kinetic energy = 1/2 × 1120 × 40²
kinetic energy = 1/2 × 1120 × 1600
kinetic energy = 1792000/2
kinetic energy = 896000 joules
Given the mass and velocity of the travelling car, the energy it will posses is 896000J
Given the data in the question;
Mass of the car; [tex]m = 1120kg[/tex]
Speed or Velocity of the car; [tex]v = 40m/s[/tex]
Energy; [tex]K_E = \ ?[/tex]
Since the car is moving, it will posses a Kinetic Energy.
Kinetic Energy [tex](K_E)[/tex] is the form energy a matter or particle possesses due its motion. It is directly proportional to object's mass and the square of its velocity.
[tex]K_E = \frac{1}{2} mv^2[/tex]
We substitute our given values into the equation
[tex]K_E = \frac{1}{2}\ *\ 1120kg\ *\ (40m/s)^2\\\\ K_E = \frac{1}{2}\ *\ 1120kg\ *\ 1600m^2/s^2\\\\K_E = 896000kg.m^2/s^2\\\\K_E = 896000J[/tex]
Therefore, Given the mass and velocity of the travelling car, the energy it will posses is 896000J
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Plants make energy. Some of it they use to preform the necessary functions of living. What do they do with the excess energy?
Answer:
They can use it for when they are dormant in the winter or to grow more sources for storing and creating energy, or they store the energy (this energy would be considered stored energy).
Use the diagram below to answer questions 3 -5
What number is at the spot of greatest kinetic energy?
What number is at the spot of least kinetic energy?
What number is at the spot of least gravitational potential energy?
Answer:
344351
Explanation:
can i have brainlyist
Number 1 is at the spot of greatest kinetic energy.
Number 3 is at the spot of least kinetic energy.
Number 1 is at the spot of least gravitational potential energy.
What is energy?Energy is the ability to perform work in physics. It could exist in several different forms, such as potential, kinetic, thermal, electrical, chemical, radioactive, etc. Additionally, there is heat and work, which is energy being transferred from one body to another.
Due to its initial velocity, the bullet will initially have kinetic energy. However, because of the law of conservation of energy, we know that when height is increased, the projectile's kinetic energy will change into gravitational potential energy if there is no air resistance. Because of the gravitational gravity g acting downward, the vertical velocity of the object will initially drop, causing a loss in kinetic energy.
Gravitational potential energy rises as a result of the decrease in kinetic energy. This will carry on until the object reaches its highest point, at which point the gravitational potential energy will be at its highest and the kinetic energy will be at its lowest.
Hence, Number 1 is at the spot of greatest kinetic energy and least gravitational potential energy. Number 3 is at the spot of least kinetic energy.
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As object moving east, and it’s velocity changes from 65 m/s to 2/5ms in 10 seconds. Which describes acceleration?
Answer:
-4.0 m/s^2
Explanation:
Acceleration is defined as the rate of change in velocity:
[tex]a=\frac{v-u}{t}[/tex]
where
v is the final velocity
u is the final velocity
t is the time elapsed
For the object in this problem,
u = 65 m/s
v = 25 m/s
t = 10 s
So the acceleration is
[tex]a=\frac{25 m/s-65 m/s}{10 s}=-4.0 m/s^2[/tex]
The negative sign tells that the acceleration is opposite (=west) to the velocity (which is towards east).
Answer:
A
Explanation:
I’m gay
What is pitch related to in terms of sound? Does it affect the speed? If so, how?
Answer:
Pitch is the listener's perception of the frequency of sound, but it does affect the speed.
Explanation:
Depending on the frequency at which the sound waves that produce them vibrate, sounds have a higher or lower pitch.
What is the pitch of the sound?A low frequency, such as 55 Hz, is heard as a low pitch and a high frequency, such as 880 hertz [Hz; cycles per second], as a high pitch.
In frequency, hertz units are used. The pitch of a sound wave increases with the speed of oscillation.
Pitch and sound frequency are connected. The frequency increases as the pitch rise. The length of the vibrating item affects the frequency and pitch of the vibration.
For instance, a shorter string vibrates more quickly than a longer string, producing a greater frequency and pitch.
Therefore, the pitch is related to in terms of sound The higher the pitch of the sound, the higher the frequency, and vice versa, hence they are directly correlated.
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