Answer:
1 half kilometer is right answer
The decibel level of a sound is given by the equation where I is the sound's intensity and corresponds to the intensity of the weakest sound that can be detected by the human ear. A sound of 140 decibels produces pain in the average human ear. Approximately how many times greater than must the intensity I of a sound be to reach this decibel level?
The decibel level (dB) of a sound is given by the equation dB = 10 * log10(I/I0), where I is the sound's intensity, and I0 corresponds to the intensity of the weakest sound that can be detected by the human ear. A sound of 140 decibels produces pain in the average human ear.
To find out how many times greater the intensity I of a sound must be to reach a decibel level of 140, follow these steps:
1. Set the decibel level to 140 in the equation: 140 = 10 * log10(I/I0).
2. Divide both sides by 10: 14 = log10(I/I0).
3. Apply the antilog (10^x) to both sides: 10^14 = I/I0.
4. Rearrange the equation to find I: I = 10^14 * I0.
The intensity I of a sound must be 10^14 times greater than I0, the intensity of the weakest sound detectable by the human ear, to reach a decibel level of 140.
For more information on decibel level see:
https://brainly.com/question/29383422
#SPJ11
Why SI system is advantageous over MKS System
Explanation:
SI system is advantageous over mks system because SI system is intended to extend by its definition and has 7 base which is more than MKS system .
Hope it is helpful to you ☺️
Answer:
Explanation:
SI system is advantageous over mks system because SI system is intended to extend by its definition and has 7 base which is more than MKS system.
A 3.09 x 10-4 T magnetic field points directly east. A loop of area 0.0471 m2 faces directly northeast. What is the magnetic flux through the loop?
Answer:
1.03 * 10^-5
Explanation:
The magnetic flux through the loop is approximately 1.317 × \(10^{(-5)\)T·m².
To calculate the magnetic flux through a loop, we use the formula:
Φ = B × A × cos(θ)
Where:
Φ is the magnetic flux
B is the magnetic field strength
A is the area of the loop
θ is the angle between the magnetic field and the normal to the loop
Given:
Magnetic field strength (B) = 3.09 × \(10^{(-4)\) T (east direction)
Area of the loop (A) = 0.0471 m²
The loop faces directly northeast
To find the angle θ, determine the angle between the magnetic field direction (east) and the normal to the loop (northeast).
Since the loop faces northeast, the angle between the normal to the loop and the east direction is 45 degrees (90 degrees divided by 2).
Now calculate the magnetic flux:
Φ = B × A × cos(θ)
Φ = (3.09 × \(10^{(-4)\) T) × (0.0471 m²) × cos(45°)
Using the value of cos(45°) as 0.7071:
Φ = (3.09 × \(10^{(-4)\) T) × (0.0471 m²) ×0.7071
Φ = 1.317 × \(10^{(-5)\) T·m²
Therefore, the magnetic flux through the loop is approximately 1.317 × \(10^{(-5)\) T·m².
To know more about magnetic flux
https://brainly.com/question/33518677
#SPJ2
Vi VE
5. A train accelerates from 60 km/h to 150 km/h and travels 600 m. How long does
this motion take?
2.0.6
600 m.
Answer:
50%.......
Explanation:
is the correct check it then send feedback
Define coefficient of cubical expansion of solid and hence write an expression for the variation of its density with temperature.
Answer:
The coefficient of cubical expansion of a solid is defined as the increase in volume of a solid per unit volume per degree Celsius rise in temperature. It is denoted by the symbol α.
Mathematically, we can express the coefficient of cubical expansion as:
α = (1/V) x (dV/dT)
where V is the volume of the solid and dV/dT is the rate of change of volume with respect to temperature.
The variation of density with temperature can be expressed using the coefficient of cubical expansion as follows:
ρ = m/V, where ρ is the density of the solid and m is its mass.
Differentiating this expression with respect to temperature, we get:
dρ/dT = (1/V) x (dm/dT) - (m/V^2) x (dV/dT)
Using the relationship between the coefficient of cubical expansion and the rate of change of volume with respect to temperature, we can substitute (dV/dT) = αV into the above expression to obtain:
dρ/dT = (1/V) x (dm/dT) - αρ
This equation shows that the variation of density with temperature is directly proportional to the coefficient of cubical expansion of the solid.
(Please could you kindly mark my answer as brainliest you could also follow me so that you could easily reach out to me for any other questions)
I WILL MARK YOU THE BRAINLIEST NO LINKS
What happens to molecules when the temperature reaches absolute zero?
They form bonds with other, nearby molecules.
All of their motion stops completely.
They begin to vibrate slowly.
They move so fast that they can't be observed.
2) all of their motion stops completely
Answer:
a their motion stops completely
Explanation:
Hope this helps :)
Why is an element considered a pure substance?
im i right
An element is considered a pure substance because it is made up of only one type of atom and cannot be broken down into a simpler form.
Answer:
Explanation:
right
The natural tendency of an object to resist a change in their state of rest or uniform motion is called __.
A
Inertia
B
Momentum
C
Impulse
D
Force
The natural tendency of an object to resist a change in their state of rest or uniform motion is called:
Option A. Inertia.
Inertia is a material attribute that characterises an object's resistance to change while at rest or in uniform motion. Galileo Galilei, a scientist, created the word in the 17th century.
Inertia is classified into two types:
Rest inertia is an object's tendency to remain at rest while no external force is acting on it.
Motion inertia : When no external force is applied on an item, its propensity is to continue travelling in a straight path at a constant speed.
The amount of inertia an item possesses is proportional to its mass. The bigger an object's mass, the higher its inertia.This indicates that changing the object's state of motion will be more complex.
For more such questions on Inertia, click on:
https://brainly.com/question/1140505
#SPJ4
If a 4500 kg car is traveling with an acceleration of 35.2 m/s/s, what is the force acting on it?
Answer:
158,400 JExplanation:
The force acting on an object given it's mass and acceleration can be found by using the formula
force = mass × acceleration
From the question we have
force = 4500 × 35.2 = 158400
We have the final answer as
158,400 JHope this helps you
how much of the light that reaches the earth from the sun is used for photosynthesis
Answer:
Less than one percent of the total energy that reaches Earth is used by plants for photosynthesis
How do synthetic fibers differ from natural fibers when viewed under a microscope.
The difference between the natural fibers and synthetic fibers is like synthetic fibers are produced using chemicals while, natural fibers are derived from plants and animals and are appreciated in the textile business for several factors.
What are natural fibers?The fibers that come from natural sources are known as natural fibers. The origins can range from zoological to botanical components. In other words, natural fibers are those that are obtained from plants and animals in their natural state. Wool, silk, hemp, cotton, and linen are a few examples of fabrics that naturally breathe.
What are synthetic fibers?Synthetic fibers are produced through a sequence of chemical processes, as their name suggests. These fibers are produced using a variety of chemical compounds rather than being derived from natural sources.
The creation of tiny molecules known as polymers is the process used to create synthetic, artificial, or man-made fibers. In most cases, raw materials and chemical compounds are used to extract polymers. Nylon, polyester, acrylic, and more are a few examples.
To know more about fibers visit
https://brainly.com/question/6325712
#SPJ4
The larger container of water contains more heat that can be used for heat conduction.
Yes, that statement is correct. The larger container of water will have more heat energy available for heat conduction due to its larger volume and higher mass. This means that it will take longer to heat up or cool down compared to a smaller container with less water. Additionally, the larger surface area of the container also allows for more efficient heat transfer through convection and radiation. Therefore, a larger container of water can be more effective for providing heat to a space or conducting heat through a system.
Find out more about container
brainly.com/question/17229261
#SPJ11
Train A leaves the station heading north at 80 mph. At the same time and from the same station, Train B heads south 65 mph. How far apart are the trains after 3 hours fo travel?
Answer:
The trains will be 435 miles apart
Explanation:
Distance covered by the two trains can be obtained by multiplying their speeds with the time frame under consideration - in this our case, it is 3hours.
For Train A
Distance covered = 80mph X 3 hours = 240miles
For train B
Distance covered = 65mph X 3 hours = 195 miles.
The total distance between the two trains after 3 hours will be
240 + 195 = 435 miles
A spherical, nonrotating planet has a radius R and a uniformdestiny rho throughout its volume. Suppose a narrow tunnel weredrilled through the planet along one of its diameters, as shown inthe figure above, in which a small ball of mass m could move freelyunder the influence of gravity. Let r be the distance of the ballfrom the center of the planet.
a. Show that the magnitude of the force on the ball at adistance r < R from the center of the planet is given by F=-Cr.where C=4/3(πGrhom).
b. On the axes below, sketch the force Fon the ball as afunction of distance r from the center of the planet.
The magnitude of the force on the ball at a distance r < R from the center of the nonrotating planet is given by F = -Cr, where C = 4/3(πGρm).
To show this, follow these steps:
1. Consider a sphere of radius r centered at the planet's center.
2. The mass of this sphere (M) can be found using the volume and density: M = (4/3)πr³ρ.
3. Apply Newton's law of gravitation: F = GmM/r².
4. Substitute M: F = Gm(4/3)πr³ρ/r².
5. Simplify the equation: F = 4/3(πGρm)r.
b) The function of F vs r is attached below
To know more about Newton's law of gravitation click on below link:
https://brainly.com/question/9373839#
#SPJ11
A fruit drops from the top of a tree 20m tall. Calculate the time it takes the fruit to reach the ground
Answer:2 seconds
Explanation:
g=10m/s2
h=20m
t=h/g
t=20/10
t=2s
What is the chemical symbol for C6H12O6
A spring has a spring constant of 100 N/m. When the spring is compressed by 5 mm (such that \Delta xΔx is negative), determine the restoring spring force.
Given that spring constant, k = 100 N/m and displacement, x = - 5mm = - 0.005 m
The formula of restoring force according to Hooke's law,
\(F=-kx\)Substituting the values, we get
\(\begin{gathered} F=-100(-0.005) \\ =\text{ 0.5 N} \end{gathered}\)Thus, the force is 0.5 N
A weighted coin has a 0.455 probability of landing on heads. if you toss the coin 27 times, what is the probability of getting heads more than 12 times?
Using the probability mass function, the chance of obtaining more than 12 heads is 0.465.
Inertia, a fundamental property of all matter, may be quantified as mass. In essence, it's the resistance of a mass of matter to altering its direction or speed in reaction to the application of a force. The more mass a body possesses, the smaller the change that is brought about by an applied force. We are using the probability mass function for simplicity.
P(H)=0.455 in the presented question suggests that landing on heads is likely.
There are 27 flips of the coin. So n=27
It is necessary to calculate the probability of obtaining heads more than 12 times.
The remaining portion of the query was clearly stated in the graphic that follows.
learn more about mass Refer:brainly.com/question/28704035
#SPJ4
|5x-8|+5=32 how would i set this problem up to solve
You have the following expression:
\(\lvert5x-8\rvert+5=32\)subtract 5 both sides of the equation:
\(\begin{gathered} \lvert5x-8\rvert=32-5 \\ \lvert5x-8\rvert=27 \end{gathered}\)Take into account that the absolute value of any number is equal to the same number but positive.
Then, you have:
\(5x-8=-27\)and
\(5x-8=27\)Then, solve the previous equations:
5x - 8 = -27 add 8 both sides
5x = -27 + 8
5x = -19 divide by 5
x = -19/5
5x - 8 = 27 add 8 both sides
5x = 27 + 8
5x = 32 divide by 5
x = 32/5
Then, the solutions of the given equations are:
x = -19/5
x = 32/5
what is the period of this pendulum if its mass is doubled? note that you do not know the value of m , l , or g , so do not assume any specific values. the required analysis involves thinking about ratios. express your answer to two significant figures and include the appropriate units.
If the mass of the pendulum is doubled, the period will increase by a factor of approximately 1.4.
The period of a simple pendulum is given by:
T = 2π√(l/g)
where T is the period, l is the length of the pendulum, and g is the acceleration due to gravity.
If we double the mass of the pendulum, the period will change. Let's denote the original mass of the pendulum as m and its period as T. If we double the mass, the new mass of the pendulum will be 2m, and we need to find the new period, which we'll denote as T'.
From the formula for the period of a simple pendulum, we can see that the period is proportional to the square root of the length and inversely proportional to the square root of the acceleration due to gravity. This means that if we double the mass while keeping the length and acceleration due to gravity constant, the period will be multiplied by a factor of √2.
Therefore, we can write:
T' = T * √2
Expressing this in two significant figures, we get:
T' = 1.4 T
So if the mass of the pendulum is doubled, the period will increase by a factor of approximately 1.4, but we cannot determine the specific value of the period without knowing the values of the length and acceleration due to gravity.
Visit to know more about Pendulum:-
brainly.com/question/27187715
#SPJ11
A plant fertilized by another plant is called __________. *
Answer:
pollination
Explanation:
it involves the transfer of a fertilized plant to another
Answer:
pollination
Explanation:
plants can't really do much without bees keep in mind
How many forces are used in a catapult ( please help me asap I have a presentation due tomorrow and. I need help starting
Answer:
Hey buddy, here is your answer.Hope it helps you.
Explanation:
A catapult is a launching device that allows us to experimentally observe projectile motion. Once the ball is launched, the only forces acting are gravity and air resistance.
I need help please :((((((
Suppose you walk across a carpet with socks on your feet. When you touch a metal door handle, you feel a shock because, c. Excess negative charges build up in your body while walking across the carpet, then jump when attracted to the positive charges in the door handle.
When you walk across a carpet with socks on your feet, the friction between the carpet and your socks causes the transfer of electrons. Electrons are negatively charged particles. As you move, the carpet rubs against your socks, stripping some electrons from the atoms in the carpet and transferring them to your socks. This results in your body gaining an excess of negative charges.
The metal door handle, on the other hand, contains positive charges. When you touch the metal door handle, there is a sudden flow of electrons from your body to the door handle. This movement of electrons is known as an electric discharge or a static shock. The excess negative charges in your body are attracted to the positive charges in the door handle, and this attraction causes the sudden discharge of electrons, resulting in the shock that you feel.
It's important to note that the shock occurs due to the difference in charges between your body and the metal door handle. The friction between your socks and the carpet allows for the buildup of static electricity, and the shock is a result of the equalization of charges when you touch the metal object. Therefore, Option E is correct.
Know more about Friction here:
https://brainly.com/question/24338873
#SPJ8
Electric charge moves in straight line at rate of 3x10^-4 coulomb per minute, Calculate
the magnetic flux density at a distance of 20 cm from them.
Answer: The magnetic flux density at a distance of 20 cm from the moving charge is 2.5x10^-9 T
Explanation:
To calculate the magnetic flux density, we need to use the formula for the magnetic field created by a moving charge:
\(B=\frac{ u_{o} .q.v}{4\pi r^{2} }\)
where:
B is the magnetic flux density
\(u_{o}\) is the vacuum permeability constant
q is the charge of the moving charge (in coulombs)
v is the velocity of the moving charge (in m/s)
r is the distance from the moving charge (in meters)
In this problem, we have:
q = 3x10⁴ C (the rate at which the electric charge moves per minute)
v = ?
r = 0.2 m = 20 cm
To find the velocity (v), we need to convert the rate of electric charge to a current.
∴ \(I = \frac{q}{t}\)
where I is the electric current (in amperes) and t is the time (in seconds).
Since the rate is given in coulombs per minute, we need to convert the time to seconds:
t = 1 minute = 60 seconds
∴ I = q / t = (3x10^-4 C) / (60 s) = 5x10^-6 A
Now we can use the formula for the magnetic flux density:
\(B=\frac{ u_{o} .q.v}{4\pi r^{2} }\)
Putting the values, we get:
\(v = \frac{B.4\pi r^2}{u_{o}.q }\)
Simplifying, we get:
v = B * 2 * 10^3 m/s
Dividing both sides by 2*10^3 m/s, we get:
B = v / (2 * 10^3 m/s)
Plugging in the value of v, we get:
B = 5x10^-6 A / (2 * 10^3 m/s) = 2.5x10^-9 T
Therefore, the magnetic flux density at a distance of 20 cm from the moving charge is 2.5x10^-9 T.
A sled moves on essentially friction-less ice. It is attached by a rope to a vertical post set in the ice. Once given a push, the sled moves around the post at a constant speed in a circle of radius R. If the rope breaks,
A. the sled will keep moving in a circle.
B. the sled will move on a curved path, but not a circle.
C. the sled will follow a curved path for a while, then move in a straight line.
D. none of the above.
The correct answer is C.he sled will follow a curved path for a while, then move in a straight line.
the sled will follow a curved path for a while, then move in a straight line.The sledge will move in a straight line tangent to the circle at the spot where the rope broke if the rope breaks. This is so that the sledge may continue to move in a circle even if the rope broke. Without the rope's force, the sledge would have continued to proceed in a straight line with constant speed, tangential to the circle. If the rope breaks, the sled will move in a straight line tangent to the point where the rope broke.
learn more about curved path here:
https://brainly.com/question/17808039
#SPJ11
Р
The densities of two metals are 6.3 g/cm³ and 3.7 g/cm³ respectively. The two metals
are of equal mass, and are melted to form an alloy.
What is the new density of the alloy?
A) 4.0 g/cm³ B) 4.7 g/cm³
C) 5.0 g/cm³
D) 10.0 g/cm³
Solution:- let d1 and d2 be their respective densitiesd1= 6.3 gram/cm³ , d2 = 3.7 gram/cm³let us consider taking m mass of both substance as it is given masses are equalLet their volumes be V1 and V2
Now ,
☯︎Density= Total Mass / Total Volume
➪\(density = \dfrac{m + m}{V1 + V2} \)
➪\( \dfrac{2m}{ \frac{m}{d1} + \frac{m}{d2} }\)
\( \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: (Volume=\frac{mass}{density}) \)
➪\( \dfrac{2\cancel{m}}{ \cancel{m}(\frac{1}{d1} + \frac{1}{d2}) }\)
➪\( \dfrac{2}{ \frac{1}{d1} + \frac{1}{d2} }\)
➪\( \dfrac{2.d1.d2}{ d1+d2 }\)
Putting Values -
✰\( \dfrac{2\times 6.3\times 3.7}{ 6.3+3.7 }\)
➪\( \dfrac{46.62}{ 10}\)
➪\( 4.662\)
≈\( 4.7 gram/cm^3\)
Which is the best way to compare speed and velocity?
A. Slowing down versus speeding up
B. Distance over time vs distance over time and direction
C. Big vs small
D. One is the hunter and one is the prey
Please help as soon ASAP!
What are other ways you could try to build an arch?
10 POINTS HELP ME
Answer:
Apply glue to one side of a layer of arch (segments) and place the next player on top. Screw them together while the glue dries. Add glue the top of these two laminated arch layers and then add one more layer, screwing it afterwards. Repeat this to make as many arches as you need (or have wood for).
Explanation:
A source charge generates an electric field of 4286 N/C at a distance of 2. 5 m. What is the magnitude of the source charge? (Use k=) 1. 2 µC 3. 0 µC 1. 2 C 3. 0 C.
The magnitude of the source charge is 3 μC which generates 4286 N/C of the electric field. Option B is correct.
What does Gauss Law state?
It states that the electric flux across any closed surface is directly proportional to the net electric charge enclosed by the surface.
\(Q = \dfrac {ER^2}k\)
Where,
\(E\) = electric force = 4286 N/C
\(k\) = Coulomb constant = \(8.99 \times 10^9 \rm\ N m ^2 /C ^2\)
\(Q\\ \) = charges = ?
\(r\) = distance of separation = 2.5 m
Put the values in the formula,
\(Q = \dfrac {4286\times 2.5 ^2}{8.99 \times 10^9 }\\\\ Q = 3\rm \ \mu C\)
Therefore, the magnitude of the source charge is 3 μC.
Learn more about Gauss's law:
https://brainly.com/question/1249602
You drive in a straight line at 18. 0 m/s m / s for 10. 0 miles, then at 34. 0 m/s m / s for another 10. 0 miles
You drive in a straight line at 18. 0 m/s m / s for 10. 0 miles, then at 34. 0 m/s m / s for another 10. 0 miles. By analyzing the distances traveled and the speeds at which you are traveling, you can calculate the corresponding times for each part of the journey.
In this scenario, you are driving in a straight line at two different speeds: 18.0 m/s for the first 10.0 miles and then 34.0 m/s for the next 10.0 miles.
To understand the concept of speed, we need to consider the relationship between distance, time, and velocity. Speed is defined as the rate at which an object covers a distance in a given amount of time. It is calculated by dividing the distance traveled by the time taken.
In the first part of the journey, you are traveling at a speed of 18.0 m/s for 10.0 miles. This means that you are covering a distance of 10.0 miles in a time period determined by the speed. The exact time taken can be calculated by dividing the distance by the speed:
Time = Distance / Speed
Time = 10.0 miles / 18.0 m/s
Similarly, in the second part of the journey, you are traveling at a speed of 34.0 m/s for another 10.0 miles. Again, you can calculate the time taken by dividing the distance by the speed:
Time = Distance / Speed
Time = 10.0 miles / 34.0 m/s
By analyzing the distances traveled and the speeds at which you are traveling, you can calculate the corresponding times for each part of the journey.
Understanding the relationship between distance, time, and speed is fundamental in analyzing and describing the motion of objects. It allows us to quantify and compare different speeds and distances traveled in a given time frame.
Learn more about speed here:
https://brainly.com/question/17661499
#SPJ11