Answer:
Reference Sound Intensity (Io) = 10^-12 W/m² the threshold of hearing at 1Khz and 0 dB when calculating sound intensity levels in decibels, resulting in the more practical range of 0 to 120 dB.
Explanation:
2. What is the kinetic energy of a car with a mass of 1050 kg and a velocity of 5 m/s?
The kinetic energy of a car with a mass of 1050kg and a velocity of 5m/s will be 13,125 joules or 13,125 kg⋅m2⋅s−2.
As we know, the formula to find the kinetic energy in a system is [tex]1/2 m v^{2}[/tex] where m is the mass of the system and v is the given velocity at the moment. So , by putting the given data in the equation, we get :
⇒[tex]1/2mv^{2}[/tex]
⇒1/2 x 1050 x 5 x 5
⇒525 x 25
⇒13,125
∴ The Kinetic energy of the car will be 13,125 Joules where joule is the SI unit of energy.
Learn more about Kinetic Energy here,
https://brainly.com/question/22174271
How many molecules are in 9 grams?.
Therefore, 3.011 × 10²³ molecules are present in 9 grams of water.
One or more atoms make up molecules. They may have the same atoms (for example, an oxygen molecule has two oxygen atoms) or different atoms if they have more than one (a water molecule has two hydrogen atoms and one oxygen atom). Biological molecules like DNA and proteins can include thousands of atoms.
Water weighs 9 grammes.
To Locate: molecular weight of 9 grammes of water
Here : We are aware that a mole of water weighs 18 g.
Therefore, there are 6.02210^23 molecules in 1 mole of water, or in 18 g of water.
So,
Water weighs 18 grammes and has 6.022 x 10^23 molecules.
= (6.022 x 10^23)/18
= 3.011 × 10²³
Learn more about molecules Visit: brainly.com/question/26044300
#SPJ4
Correct Question:
How many molecules are present in 9 gram of water ?
Is Newton's third law always true?.
Newton's third law does not hold always true.
Newton's third law, also known as the law of action and reaction, states that for every action force, there is an equal and opposite reaction force. This means that if object A exerts a force on object B, object B will exert an equal and opposite force on object A.
This is often demonstrated with examples such as a person pushing a wall or a rocket being propelled forward by the force of its exhaust.
One exception to this law is when forces such as friction and air resistance act on an object. These forces are not equal and opposite to the action force and can cause the reaction force to be less than the action force.
Another exception is when Newton's laws are applied in the realm of quantum mechanics, the laws of classical mechanics such as Newton's laws, no longer hold true.
In the quantum world, particles don't have definite positions or velocities, and they can exist in multiple places at once. As a result, the laws of classical mechanics do not apply to the quantum world.
To learn more about quantum mechanics:
https://brainly.com/question/26095165
#SPJ4
An object is shot upwards, from the ground, with an initial velocity of 120
m/s. How high will it be after 4.0s?
480 m
402 m
380 m
302 m
We can use the kinematic equation: h = vit + 1/2g*t^2 to determine the height of an object shot upwards with an initial velocity of 120 m/s after 4.0s.
Where h is the height, vi is the initial velocity, t is the time, and g is the acceleration due to gravity (approximately 9.8 m/s^2).
h = 1204 + 1/29.8*4^2
h = 480m
The height of the object after 4.0s is 480m. So the answer is 480 m.
Is magnitude always positive?.
The magnitude is always positive because magnitude is the absolute value and it cannot be negative as the minus sign in a vector means direction.
A force that is negative implies that it is moving in the opposite way of a reference direction. The magnitude of a force, however, cannot be negative. The component of the vector that lacks direction is its length (positive or negative). The summation's values are squared in the formula, making them positive. It just takes one step to determine the magnitude of a simple integer. The next step is to find the number's absolute value. When dealing with simple integers, the absolute value can be thought of as the "positive" of each number. This is the one and only instant when you can disregard the negative sign. The minus sign is deleted when the magnitude or absolute value is being discussed. In the realm of magnitude and absolute value, negative numbers are always considered positive.
To learn more about magnitude, click here:
https://brainly.com/question/28173919
#SPJ4
What is Newton's 2nd law called?.
Newton's second law, also known as the law of acceleration or the force law, states that the acceleration of an object is directly proportional to the net force acting on the object and inversely proportional to its mass.
It means that the force applied to an object is equal to the product of its mass and acceleration.
In simple terms, it says that the more force applied to an object, the greater its acceleration will be, and the more massive an object is, the less it will accelerate for a given force.
This law is used to calculate the motion of objects under the influence of forces and is important in explaining the behavior of objects in motion. It can be represented mathematically as F = ma, where F is the net force acting on an object, m is the mass of the object and a is its acceleration.
To learn more about Newton's 2nd law at
https://brainly.com/question/27573481?referrer=searchResults
#SPJ4
What are the 4 steps to solving any physics problem?.
Does Faster internet reduce latency?.
Yes, Internet latency is decreased by fast internet speed.
Internet transmission rate. Your internet connection speeds might impact your ping in addition to the different elements that determine how good your ISP is or latency. Your ping will decrease as a result of faster data transmission and reception.
A slower internet connection would result in noticeably lower FPS no matter what game you were playing. A slower internet connection results in more ping, which can make everything lag and lead players to become immobile. Anything under 100ms is ok for browsing and streaming in general. You should aim for a maximum of 50ms, but under 30ms would be great for serious play.
To learn more about Latency :
https://brainly.com/question/30276827
#SPJ4
What is 50 kg in newtons?.
What is the difference between rotation and revolution explain with the help of an example?.
Rotation is the movement of an object on its own axis whereas revolution is its movement around another object.
A rotation is the circular movement of an object around a pivot point. A rotation axis is a line that three-dimensional objects such as the earth, moon, and other planets always rotate around. If the axis passes through the centre of mass of the body, the body is said to rotate or spin.
Rotation is frequently used as a synonym for revolution. In many fields, such as astronomy and related subjects, however, revolution is referred to as an orbital revolution. It is used when one body moves around another, whereas rotation is when one body moves around the axis. The Moon, for example, revolves around the Earth, and the Earth revolves around the Sun.
Learn more about rotation axis here:
https://brainly.com/question/21893931
#SPJ4
What is mass in class 9?.
What is momentum Class 9 very short answer?.
Momentum is characterised as the intensity of a body's motion. The formula is "mass times velocity."
As momentum depends on velocity, it also depends on the body's direction of motion. Since velocity is a vector and mass is a scalar, momentum is a vector quantity.
Mass times speed equals momentum.
Momentum can be viewed as a body's "power" while it is moving, or the amount of force it can exert on another body. For instance, a baseball that is thrown quickly and with a tiny mass could have the same momentum as a bowling ball with a heavy mass travelling very slowly.
To learn more about Momentum :
https://brainly.com/question/29842708
#SPJ4
Which action would help reduce global warming?- Eat less red meat so fewer cattle need to be raised.- Ride a bicycle rather than walk to school.- Clear more forests to produce more farmland.- Use more fertilizers to increase crop production.
Eating less red meat so fewer cattle need to be raised would help reduce global warming.
What are the precautions to reduce by global warming?The production of red meat, particularly beef, is a major contributor to greenhouse gas emissions. Cattle produce methane, a potent greenhouse gas, and the production of feed for cattle also requires large amounts of energy, water and land. Additionally, the clearing of forests for grazing land and feed production also contributes to carbon emissions.
Riding a bicycle rather than walking to school would also help reduce global warming because it would decrease the amount of CO2 emissions produced by cars and other vehicles.
Clearing more forests to produce more farmland and using more fertilizers to increase crop production would not help to reduce global warming, as the clearing of forests causes a release of stored carbon into the atmosphere and the use of fertilizers and pesticides also has an environmental impact.
To know more about global warming visit:
https://brainly.com/question/3553382
#SPJ4
help!!! Which of the following statements are examples of negative social impacts of some technologies? (Choose all that apply)
a.Improvements in communication technology allow people to share new ideas and scientific knowledge.
b.People may spend so much time learning and using new technology, that it gets in the way of doing tasks.
c.The burning of fossil fuels releases compounds into the air that can be harmful to breathe.
d.Communication technology can cause people to undervalue face-to-face communication.
e.People can become unnecessarily dependent on technology to complete tasks they used to do themselves.
c.The burning of fossil fuels releases compounds into the air that can be harmful to breathe.
d.Communication technology can cause people to undervalue face-to-face communication.
e.People can become unnecessarily dependent on technology to complete tasks they used to do themselves.
what type of magnet is used for the coil in a relay?
Electromagnet is the type of magnet which is used in the coil in a relay.
What kind of magnet does a relay use?Two or more electromagnets in the relay are energized by the relay coil. The static iron core is positioned between the electromagnet. The rotational magnetic field is produced by the coil that is wound on the electromagnet.
A relay magnet: what is it?The activating or primary side of a relay is another synonym for the magnetic, coil system, or motor unit. It is made up of every part required to transform the electrical energy from the primary side into the mechanical force needed to open the contacts and switch the secondary circuit.
Learn more about magnet here:
brainly.com/question/2485899
#SPJ4
A system of objects that are not moving with respect to one another called?
An arrangement of things that aren't shifting in relation to one another is a reference point. A time reference is required to fully and properly describe motion.
Why are you referring to motion?In physics, motion changes over time depending on a body's position or orientation. Translation is the action of moving across a line or curve. Rotation is the term used to describe motion that modifies a body's orientation.
Motion tracking's precisionConsumer-grade digital cameras with the APAS software can be used for motion tracking to obtain sub-millimeter precision at frame rates suitable for kinematic analysis of lip/jaw movements in both research and therapeutic applications.
To know more about motion visit
https://brainly.com/question/10474279
#SPJ4
How long will it take a peron on a kateboard to travel 45 m and attain a peed of 7 m/ from ret ?
Here, a denotes acceleration, t denotes time, and u and v denote beginning and ultimate velocities, respectively. u = v + at.
Can you use a skateboard to travel?In carry-on luggage, skateboards are permitted. If there are any size or weight limits, please check with your airline additional forbidden itemsSkateboards that fit under seats do not need to be under bags or covers, but they must be stored with their wheels up to prevent rolling. A skateboard must be packed in a bag or have the wheels covered if it is to be stored in an overhead container (trash bag is acceptable).As the skateboarder comes to a stop, his final velocity will be zero. To calculate the value of time, replace the necessary values (t).0 m/s = 45 m/s + 7 m/s t t = 6.42 s.
To learn more about velocities refer to:
https://brainly.com/question/25905661
#SPJ4
What happens to the kinetic energy and the potential energy of the roller coaster at the top of a hill?.
When a roller coaster is at the top of the hill,
The kinetic energy is at the lowest, zero.The potential energy is at the highest.The conclusion is obtained from the principle of conservation of energy.
What is principle of conservation of energy?The principle of conservation of energy states that "The total energy is neither increased nor decreased in any process. Energy can be transformed from one form to another, and transferred from one object to another, but the total amount remains constant."
In the same way, the Conservation of Mechanical Energy states that the total mechanical energy of a system is conserved. It can be expressed as
E₁ = E₂
KE₁ + U₁ = KE₂ + U₂
½mv₁ + mgh₁ = ½mv₂ + mgh₂
Where
E = mechanical energyKE = kinetic energyU = potential energym = mass of an objectv = speed of objecth = height of objectThe index 1 and 2 shows at point 1 and 2.
When a roller coaster is at the top of the hill,
The height is at the highest, h = maximum.It doesn't move, so the speed is at the lowest, v = 0.Suppose that point 1 is at a certain point and point 2 is at the top of the hill. We get
E₁ = E₂
E₁ = ½mv₂ + mgh₂
E₁ = ½m(0) + mgh
E₁ = mgh
Hence, at the top of the hill, the roller coaster would has no kinetic energy, otherwise the potential energy is at the highest.
Learn more about kinetic and potential energy here:
brainly.com/question/30265775
#SPJ4
What is ballistic in simple words?.
Ballistics is the study of projectile propulsion, flight, and impact. It is separated into a number of disciplines. The subjects of internal and external ballistics, respectively, are projectile propulsion and flight.
Intermediate ballistics refers to the phase that exists between these two regimes. Ballistics is the study of how projectiles are fired, how they fly, and how they strike a target. It is frequently related to rockets, guided missiles, and projectiles launched from weapons.
The word "ballistic" refers to how an object travels through space. Typically, it refers to projectiles fired by weapons, such as bullets or rockets. Get out of the way if a ballistic missile is headed your way! A ballistic missile is only guided during its initial launch.
Learn more about ballistic Visit: brainly.com/question/2405479
#SPJ4
a physics demo launches a ball horizontally while dropping a second ball vertically at exactly the same time.
if two balls are launched from a height. One is horizontally and other is vertically downwards, then both of the balls will touch the ground exactly at the same time.
When a ball is launched from a height than at some angle then its velocity(v) can be considered as divided into two components: One is vertical and the other is horizontal.
v₁ = vcosθ (horizontal component)
v₂ = vsinθ (vertical component)
Vertical component is always subjected to the acceleration due to gravity. Which is same for every vertical motion. Since the dropping height is same for both the balls, so their travelling time in the vertical downward direction will also be same. So they will touch the ground exactly at the same time.
--The given question is incomplete, the complete question is
"A physical demo launches a ball horizontally while dropping a second ball vertically at exactly same time from same height. Which ball will touch the ground first?"--
To know more about acceleration due to gravity, here
https://brainly.com/question/13860566
#SPJ4
How do I reduce latency and packet loss?.
Ping measures the latency of an internet connection and packet loss is the data lost between your device and the server of the app.
When you work on an application, your device constantly exchanges “packets” of data with the app’s server or host. The travel time of the round-trip of those packets is your ping. Ping depends on the speed of your internet connection and distance of the server from your device. Packet loss can be reduced by closing all background applications, by trying time-tested technique, if the connection is wired then try connecting the ethernet cable to different port, try wired connection if you are using wi-fi, etc.
To know more about latency, here
https://brainly.com/question/14264521
#SPJ4
What was the first law in the world?.
The first law of motion is the law of inertia. The law is about the tendency of any object to remains in state of motion until and unless an external force is applied to it.
The law of inertia states that any object remains in its state of motion, (either in rest or in motion) until and unless an external unbalanced force is applied to it. For example if a car is travelling at a constant speed then it will continue to remain in this state for ever. But practically it comes to at rest state after covering some distance. This is due to the opposite force of friction working between the tires of the car and the road surface.
--The given question is incorrect, the correct question is
"What is the first law of motion?"--
To know more about motion, here
https://brainly.com/question/22810476
#SPJ4
What is torque also known as?.
Torque is also known as moment of force. It is the tendency of a force to rotate the body on which it is applied.
"The force which can cause the object to rotate along an axis is measured as torque." Force is what propels an object's acceleration in linear kinematics. Similar to it, an angular acceleration is brought on by torque. Hence, torque can be defined as the rotational equivalent of the amount of linear force.
The SI unit of torque is Newton-metre. Turning a steering wheel, while walking torque is created at the hip joint to turn the leg and opening the cap of the bottle are the examples of torque.
To know more about torque:
https://brainly.com/question/1233416
#SPJ4
What could be a hypothesis that would illustrate the relationship between speed and kinetic?.
Because of the linear relationship between mass and kinetic energy on a graph, if the mass of an object increases, so will its kinetic energy. The object's velocity is v.
The relationship illustrated above demonstrates that an object's kinetic energy is inversely proportional to its mass multiplied by its speed. It's possible that this is true: Because kinetic energy and speed are closely correlated, an object's kinetic energy grows as its speed increases.
The nonlinear (square) proportional relationship (KE v2) between kinetic energy and speed, where:
1. As an object's speed doubles, its kinetic energy increases by a factor of four.
2. As the object's speed is halved, the kinetic energy is reduced by a factor of four.
Learn more about kinetic Visit: brainly.com/question/25959744
#SPJ4
The anode of an x ray tube i at a potential of 125 000 V with repect to the cathode. A) How much work i done by the electric force when an electron i accelerated from the cathode to the anode? b) If the electron i initially at ret, what kinetic energy doe the electron have when it arrive at the anode?
A) The work done by the electric force on an electron is equal to the change in its electrical potential energy, which is equal to the potential difference between the cathode and the anode multiplied by the charge of the electron.
W = qV = (1.6 x 10^-19 C)(125 000 V) = 2 x 10^-14 J
B) The kinetic energy of an object is given by the equation KE = 1/2 mv^2. If the electron is initially at rest, its final kinetic energy is equal to the work done on it by the electric force, since all the energy used to accelerate it is converted to kinetic energy.
KE = W = 2 x 10^-14 J
Learn more about Kinetic Energy here: https://brainly.com/question/999862
#SPJ4
Calculate the frequency of ultraonic wave that can be generated by nickel rod of length 4 cm Young' modulu of nickel i 207 gpa denity of nickel i 8900kg\m^3
The frequency of the ultrasonic wave generated by a nickel rod of length 4 cm is 415 kHz.
What is Frequency?Frequency is the number of times a phenomenon occurs within a given period of time. It is measured in hertz (Hz), which is equal to one occurrence per second. Frequency is used in a variety of fields, including sound, radio waves, light, and electricity. It is a measure of how often a certain event occurs, and it is often used to measure oscillations in a system. Frequency is an important concept in physics and mathematics, and it is used to calculate the speed of waves and the behavior of particles.
The frequency of an ultrasonic wave that can be generated by a nickel rod of length 4 cm can be calculated using the speed of sound in Nickel (V), Young’s Modulus (E) and density (ρ).
The speed of sound in Nickel (V) is calculated using the formula V = √(E/ρ).
Therefore, V = √((207 GPa)/(8900 kg/m³))
V = 3320 m/s
Now the frequency (f) of the ultrasonic wave generated can be calculated using the formula:
f = V/λ
where λ is the wavelength of the wave.
The wavelength (λ) is calculated using the formula:
λ = 2L
where L is the length of the rod.
Therefore, λ = 2*4 cm = 8 cm
Now, f = 3320 m/s/8 cm
f = 415 kHz.
Therefore, the frequency of the ultrasonic wave generated by a nickel rod of length 4 cm is 415 kHz.
To know more about frequency click-
https://brainly.com/question/254161
#SPJ4
How do I find the average time and average velocity (m/s) for a sphere?
An object of mass 178 kg moves in a smooth
straight tunnel of length 2640 km dug through
a chord of a planet of mass 4.48 x 1024 kg and
radius 8.26 x 106 m.
y
F/m
Find the effective force constant of the har-
monic motion.
The value of gravitational
constant is 6.67259 x 10-¹1 Nm²/kg².
Answer in units of N/m.
Answer: If the mass of the object is 178 kg: k = 9.44*10^-5 N/m
Answer for the mass being 82 kg is not complete, because G was not given.
Explanation:
If the mass of the object is 178 kg:
The mass of object (m) = 178 kg
Length of tunnel (l) = 2640 km
***The minimum displacement (its amplitude) of object from its mean position,
A = 2640/2 = 1320 km = 1.320 * 10^6 m
Mass of planet (M) = 4.48 * 10^24 kg
Its Radius (R) = 8.26 * 10^6 m
Gravitational constant (G) = 6.67259 * 10^-11 Nm^2/kg^2
Now, restoring force for given hormonic motion will be
Vector of F = -((GMm)/R^3) * x
Comparing with, vector of F = -k*x, we get
k = (GMm)/R^3
k = (((6.67259*10^-11)*(4.48*10^24)*178)/(8.26*10^6)^3)
k = ((5320.99017*10^(-11+24))/(563.559976*10^18))
k = 9.44*10^(13-18)
k = 9.44*10^-5 N/m
If the mass of the object is 82 kg:
The mass of object (m) = 82 kg
Length of tunnel (l) = 2430 km
***The minimum displacement (its amplitude) of object from its mean position,
A = 2430/2 = 1215 km = 1.215*10^6 m
Mass of planet (M) = 4.16 * 10^24 kg
Its Radius (R) = 7 * 10^6 m
Gravitational constant (G) not given in the photo
Now, restoring force for given hormonic motion will be
Vector of F = -((GMm)/R^3) * x
Comparing with, vector of F = -k*x, we get
k = (GMm)/R^3
k = ((G*(4.16*10^24)*82)/(7*10^6)^3)
Remember that when multiplying two values with exponents, you add the exponents together!
k = ((3.4112*10^26 * G)/(3.43*10^20))
Insert G to solve!
A potter’ wheel move from ret to an angular peed of 0. 40 rev/ in 36. 1. Auming contant angular acceleration,
what i it angular acceleration in rad/2
?
Anwer in unit of rad/
2
The constant angular acceleration is 0.0069 [tex]rad/s^{2}[/tex].
Angular Acceleration is defined as the time rate of change of angular velocity. It is usually expressed in radians per second per second. The angular acceleration is also known as rotational acceleration. It is a quantitative expression of the change in angular velocity per unit time.A varying velocity results in acceleration. If an object is spinning and its speed is changing, then we say it is accelerating angularly.Angular acceleration is measured in units of angle per unit time squared (which in SI units is radians per second squared), and is usually represented by the symbol alpha .Given:
Angular speed = 0.40 rev/s
Time = 36.1 s
So Angular acceleration = [tex]0.04 rad/s * \frac{2\pi rad}{1 rev} * \frac{1}{36.1} = 0.0069 rad/s^{2}[/tex]
To know more about acceleration visit:
https://brainly.com/question/26133378
#SPJ4
What is the smallest unit of an image Mcq?.
A pixel is commonly regarded as the tiniest single component of a digital image.
What is pixel?A pixel represents the value of a single square in the image and is assigned a value. The total number of pixels in an image is calculated similarly to the formula for rectangle area: number of pixels across multiplied by number of pixels down. The smallest unit of a digital image or graphic that can be displayed and represented on a digital display device is a pixel. In digital graphics, a pixel is the fundamental logical unit. Pixels are used to create an image, video, text, or any other visible thing on a computer display.
Here,
A pixel is widely considered to be the smallest single component of a digital image.
To know more about pixel,
https://brainly.com/question/25662747
#SPJ4
