The lowest frequency that will produce constructive interference at your location is about 133.9 Hz.
How does the distance between the speakers affect the frequency of constructive interference?The distance between the speakers affects the frequency of constructive interference because it affects the phase difference between the waves emitted by the speakers. A smaller distance between the speakers results in a smaller phase difference, and a larger distance results in a larger phase difference. This means that at a certain distance, the waves emitted by the speakers will be in phase, resulting in constructive interference. The frequency at which this occurs is dependent on the wavelength of the waves and the distance between the speakers.
How do you calculate the lowest frequency that will produce constructive interference at your location?The lowest frequency that will produce constructive interference at your location can be found using the equation:
f = v / (2d)
Given,
d = 0.600 m (distance between speakers)
d' = 1.000 m (distance from speaker to listener)
v = 331.4 + 0.6T m/s (speed of sound in air, where T is the temperature in Celsius)
T = 15.0 °C (air temperature)
First, we need to calculate the speed of sound at 15 degrees celsius:
v = 331.4 + 0.6T
v = 331.4 + 0.6 x 15
v = 343.4 m/s
Now we can calculate the frequency of constructive interference:
f = v / (2 x (d + d'))
f = 343.4 / (2 x (0.6 + 1))
f = 343.4 / (2 x 1.6)
f = 343.4 / 2.56
f = 133.9 Hz
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when one gallon of gasoline is burned in a car engine, of internal energy is released. suppose that of this energy flows directly into the surroundings (engine block and exhaust system) in the form of heat. if of work is required to make the car go one mile, how many miles can the car travel on one gallon of gas?
The car can travel 28 miles on one gallon of gas. Energy released from burning one gallon of gas = 1 gallon x 31,000,000 BTU/gal = 31,000,000 BTU,Energy released in form of heat = 0.9 x 31,000,000 BTU = 27,900,000 BTU,Work required to make the car go one mile = 0.1 x 31,000,000 BTU = 3,100,000 BTU,Number of miles the car can travel on one gallon of gas = 27,900,000 BTU/3,100,000 BTU = 9 miles,Therefore, the car can travel 9 miles x 3 = 27 miles on one gallon of gas.
What is the miles ?
Miles are a unit of measurement used to measure distances. It is a unit of length in both the imperial and US customary measurement systems. One mile is equal to 1.609 kilometers, 1,760 yards, or 5,280 feet. It is used to measure the distance between two locations, such as cities or towns, as well as for measuring the distance of a journey.
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What type of telescope is the hubble space telescope?
The Hubble space telescope is a reflecting telescope.
Mirrors are used by reflecting telescopes, also called reflectors, to collect and concentrate light. The HST features an eight-foot diameter primary mirror and a secondary mirror that focuses the light collected by the primary mirror onto the telescope's scientific equipment. The HST is a Cassegrain telescope, allowing for a compact design due to its concave primary mirror and convex secondary mirror.
Reflecting telescopes are frequently chosen over lens-based ones for space-based telescopes because lenses are more susceptible to distortion and poor image quality caused by thermal expansion and contraction than mirrors are. The HST was put into orbit in the year 1990 and has since been utilised to produce a number of ground-breaking astronomical discoveries.
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Imagine if astronomers have discovered a new planet next to Jupiter and named it Planet X. The average distance of Jupiter from the sun is about 5 AU and it has an orbital period of 12 years. Astronomers are not sure about how far Planet X is, but they do know that it had an orbital period of about 10 years. What is the average distance of Planet X from the sun in AU?
Answer:
95
Explanation:
because x × au= 69 +26
which means planet x is destroyed
Select the correct answer. what is 7.58e8 expressed in standard notation? a. 0.0000000758 b. 0.000000758 c. 758,000,000 d. 75,800,000,000
The correct answer is c. 758,000,000. The 7.58e8 is the scientific notation, also known as exponential notation, which is a way of expressing very large or very small numbers
What is the significance of the letter "e" in a decimal number?The letter "e" in a decimal number, indicates scientific notation. The "e" stands for the exponent of 10, and the number following it represents the power to which the number 10 is raised.
7.58e8 in scientific notation represents 7.58 x 10^8 .In this case, 8 is the exponent, meaning that the number 7.58 is multiplied by 10 to the power of 8, or 10^8, resulting in 758,000,000.
Why is exponential notation advantageous?Using exponential notation, we may delete zeros and represent a number in a compact form by taking use of the fact that multiplication or dividing by multiples of 10 moves the decimal point of a number to the left or right.
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cray-zee is speeding along at 25.5 m/s as she approaches the level section of track near the loading dock of the whizzer roller coaster ride. a braking system abruptly brings the 356-kg car (rider mass included) to a speed of 3.6 m/s over a distance of 6.22 meters. determine the magnitude (positive answer) of the braking force applied to cray-zee's car.
The magnitude of the braking force (braking system abruptly brings the 356-kg car (rider mass included) to a speed of 3.6 m/s over a distance of 6.22 meters.) applied to cray-zee's car = 18,231 N
The force that slows the car when the driver depresses the brake pedal is known as the braking force.
It is impossible to directly quantify this well-known force since it operates on tires that are in touch with the ground, without which nothing would be possible.
It is still feasible to determine its severity, though. You simply need to know the car's mass and its rate of deceleration, then combine the two.
W = [tex]\frac{1}{2}[/tex] mv₁² - [tex]\frac{1}{2}[/tex] mv₀²
= [tex]\frac{1}{2}[/tex] (356) (25.5)² - [tex]\frac{1}{2}[/tex] (356) (3.6)²
= 115,744 - 2,306
= 113,438 J
Hence, the magnitude of the braking force:
W = F x d
113,438 J = F x 6.22
F = 18,231 N
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Which of the following is an example of a velocity?
2 mile/minute
80 miles/hour
9.8 meters/second/second
45 kilometers/hour East
c. describe an object that floats in water and an object that sinks in water in terms of their respective densities, as well as in terms of the relationship between each one's weight and buoyant force. (1 point)
An object floats and sinks in water based on the density of that particular object.
What is buoyant force?The force that makes objects float is called buoyancy. It is the pressure placed on a surface that is partially or completely submerged in a fluid. Differences in pressure acting on opposing sides of an object submerged in a static fluid produce buoyancy.
Why does an object floats and sinks in water?An object that floats in water, such as a piece of wood or a rubber duck, has a lower density than the water it is in. This means that the weight of the object is less than the buoyant force acting on it, which is the upward force exerted by the water on the object.
An object that sinks in water, such as a rock or a metal bar, has a higher density than the water it is in. This means that the weight of the object is greater than the buoyant force acting on it, which means that the buoyant force is not sufficient to counteract the weight of the object and it sinks.
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a 0.500-kg mass attached to a spring with a force constant of 8.00 n/m vibrates in simple harmonic motion with an amplitude of 10.0 cm. calculate (a) the maximum va
The maximum volt-ampere(va) is 0.40 m/s.
What is force?An influence that can alter an object's motion is called a force. A force can cause an object with mass to change its velocity or accelerate. (for example, moving from a state of rest). Intuitively, a push or a pull can also be used to describe force.
Given,
mass=0.500 kg
force=8.00 n/m
amplitude= 10.0 cm
The maximum velocity of the mass can be calculated using the equation:
max v= A * ω
where A is the amplitude of the motion (in meters) and ω is the angular frequency of the motion (in radians per second).
We can find angular velocity using the equation:
ω = sqrt(k/m)
where k is the force constant of the spring (in newtons per meter) and m is the mass of the object (in kilograms).
Substituting in the given values:
ω= sqrt(8.00 N/m / 0.500 kg) = 4 rad/s.
A = 0.10 m (converting the amplitude from cm to m)
So,v_max = A * ω = 0.10 m * 4 rad/s = 0.40 m/s.
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when the outdoor emergency warning siren at cheryl's school was tested, the sound from the siren took 7.0 s to reach her house located 2.40 km from the school. what is the speed of sound in air?
According to question, The speed of sound in air is 342.85 m/s.
Define speed?the speed at which an object's location changes in any direction. The distance traveled in relation to the time it took to travel that distance is how speed is defined. Since speed simply has a direction and no magnitude, it is a scalar quantity.Speed tells us how fast something or someone is travelling.
the solution is -
distance d = 2.4 km = 2400 m , time t = 7s
speed of sound = distance/time
speed of sound = 2400/7
speed of sound = 342.85 m/s
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a golf ball rolls off the top flight of concrete steps of total vertical height of 4 m. the ball hits 4 times on the way down, each time striking the horizontal part of a different step 1 m lower. if all collisions are perfectly elastic, what is the bounce height on the 4th bonce when the ball reaches the bottom of the stairs?
The bounce height on the 4th bounce is 1.5 m.
The ball will lose some energy with each bounce, so the bounce height will decrease each time.
Assuming the ball starts from rest and the collisions are perfectly elastic, we can use the conservation of energy to find the bounce height on each bounce.
On the first bounce, the ball will reach a height of:
h1 = mgh/2
where m is the mass of the ball, g is the acceleration due to gravity, and h is the height of the first bounce.
On the second bounce, the ball will reach a height of:
h2 = (mgh/2) / 2
On the third bounce, the ball will reach a height of:
h3 = (mgh/2) / 4
On the fourth bounce, the ball will reach a height of:
h4 = (mgh/2) / 8
So the fourth bounce height will be 1.5 m.
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As two oppositely charged particles approach each other, what happens to the electrical force between them?
As two oppositely charged particles approach each other, the attractive force increases between them.
What kind of force is attractive?Only attraction is possible with gravitational force. It can't be disgusting. But depending on the makeup of the charges or magnetic poles, both electrostatic and magnetic forces can be either attracting or repellent. The external force that draws two separate masses together is referred to as the force of attraction. Gravitation, magnetism, & electric forces are a few examples.
What does chemistry's attractive force mean?A force that attracts the protons or positive parts of one molecule to the electrons or negative parts of another molecule is known as an intermolecular force. A substance's diverse chemical and physical properties are influenced by this force.
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if the radius of the hill is 30 meters, at what speed would the centripetal force equal the force of gravity
If the hill's circumference is 30 meters. The centripetal force equals the gravitational force at 9.39 m/s.
The centripetal force is defined.Any force that changes the direction of motion towards to center of either a circular motion is known as a centripetal force. The part of the force that produces the rotational motion is the part that is orthogonal to the velocity.
Is the force of gravity centripetal?Force acting is used to maintain an object moving in a circle due to gravity. Since gravity generally behaves opposed to motion, it has no effect on an item in a circular path.
Radius, r = 30 m
speed = v.
(Fr = (mv^2)/r
μk mg& = (mv^2)/r
v =√(μ_k gr)
v = √(0.30×9.80×30)
v = 9.39 m/s
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A ball with a horizontal speed of 1.25 m/s rolls off a bench 1.00 m above the floor.A. How long will it take the ball to hit the floor?B. How far from a point on the floor directly below the edge of the bench will the ball land?
Time to impact the ground is 0.45 seconds. It will land 0.56 meters away from the table. The bullet appears to be traveling straight forward without changing directions, according to the horizontal speed.
How is the horizontal speed determined?By measuring the ball's diameter d and dividing it by the time t it takes for it to cross the photogate, one can also calculate the ball's starting horizontal velocity. Therefore, Vo = d/t.
Is speed horizontal velocity?Typically, horizontal velocity is defined as horizontal displacement divided by time, expressed in units like meters per second or miles per hour. Simply put, displacement is the distance an object has traveled since leaving a starting location.
y=Vyi t + 1/2 gt²
1 = o+ 1/2 ×9.8×t²
1=4.9 ×t²
t²= 1/4.9= 0.204081633
==> t = 0.45 sec
x= Vx× t
Here
Vx = 1.25 m/sec
t= 0.45 sec
x= 1.25 × 0.45 = 0.56 m
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Several shots were fired during a concert downtown. The performing musician received minor injuries, and no one else was injured. The musician is now suing the city for not providing proper security for the event. The musician has had financial trouble after leaving a successful boyband, and there are rumors that the musician organized the shooting so he could collect money from the lawsuit. A tree near the stage was found with several bullet holes, and it was determined the shots could not have come from the crowd. The musician owns the penthouse in the apartment building in front of the concert venue, so forensic analysts want to determine if the shots could have come from there. The penthouse is on the sixth floor, which is 85 feet from the ground. The building is 60 feet from the tree. Using the measurements from the crime scene, show your math to determine if the shooter came from the penthouse.
Answer:
Explanation:
To determine if the shooter could have come from the penthouse, we need to calculate the angle of elevation from the penthouse to the tree. We can use trigonometry to do this.
We know that the height of the penthouse is 85 feet, and the distance from the penthouse to the tree is 60 feet. We can use the tangent function to calculate the angle of elevation:
tan(angle of elevation) = opposite / adjacent
opposite = height of penthouse = 85 feet
adjacent = distance from penthouse to tree = 60 feet
tan(angle of elevation) = 85 / 60
angle of elevation = arctan(85/60)
Now we have the angle of elevation, we can determine if the shooter could have come from the penthouse. If the angle of elevation is greater than 90 degrees, the shooter would have had to shoot at an impossible angle, and the shots could not have come from the penthouse.
In this case, the angle of elevation is approximately 62.9 degrees, which is less than 90 degrees. So the shots could have come from the penthouse.
It's important to note that this is a simplified calculation based on the data provided, and it is not a conclusive evidence. A detailed investigation is required to gather all the facts and evidence before determining the shooter's location.
an object is in freefall. it remains in freefall for 5 seconds before it hits the ground. how high was the object when it first started falling if its starting velocity was 0? (acceleration due to gravity is -9.8 meters/second 2).
The height of the object when it first started falling is 0 meters.
The equation used to calculate the height of an object in freefall is h = (1/2)gt2, where h is the height, g is the acceleration due to gravity (9.8 m/s2) and t is the time in seconds.
What is velocity?
Velocity is a vector quantity that measures the rate and direction of an object's motion. It is the rate at which an object's position changes over time, measured in meters per second (m/s).
Since the starting velocity is 0, the height when it first started falling is 0.
h = (1/2)gt2
h = (1/2)(-9.8 m/s2)(5s)2
h = 0 m
Therefore, The height of the object when it first started falling is 0 meters.
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a pendulum clock is in an elevator. the clock will run fast when the elevator is group of answer choices accelerating downward. falling at constant speed. accelerating upward. rising at constant speed.
The clock will run fast when the elevator is accelerating downward.
A pendulum clock is what?A pendulum clock is a timepiece that keeps time by swinging a weight called a pendulum. Because a pendulum is a harmonic oscillator, it has the advantage of swinging back and forth in a precise time interval that is based on its length and resists swinging at other rates.
What occurs when an elevator quickly ascends?The forces experienced in an elevator are applied in this way to Newton's second law. You feel heavy when moving upwards and lighter when moving downwardly when you accelerate. You would feel weightless if the elevator cable snapped since you and the elevator would both be descending at the same speed.
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A wave with a frequency of 17 Hz ha a wavelength of 5 meter. At what peed will thi wave travel?
The wave's speed is 85 m/s if its wavelength is 5 meters and its frequency is 17 Hz.
What is a wave length?A waveform signal that is propagated in space or down a wire does have a wavelength, that is the separation between two equal places (adjacent crests) in the consecutive cycles. This length is typically specified in wireless systems in metres (m), centimetres (cm), or millimeters (mm) (mm).
given data,
frequency of the wave v = 17 Hz
Wavelength of the wave = 5m
speed of the wave s = ?
Calculating the speed of wave
We know that,
Speed= frequency × wavelength
Thus,
s= 17 × 5 m/s
s= 85 m/s
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Suppose you are at the edge of a cliff and throw one ball down to the ground below and another up at the same speed. The upward-thrown ball rises and then falls to the ground below. How do the speeds of the balls compare when striking the ground
The speed of the two balls when striking the ground will be the same. Both balls will have the same initial velocity when thrown, and the only force acting on them is gravity.
What is the speed?The speed of an object is the rate of change of its position relative to a frame of reference, and is a function of time. It is a scalar quantity and is measured in meters per second (m/s). The speed of an object can be calculated by dividing the distance covered by the object by the time taken. An object's speed can be increased or decreased by applying an external force.
Here the acting acceleration is gravity
So,
v₁ - u₁ = gt
v₂ - u₂ = gt
As time and and gravity is same
v₁ - u₁ = v₂ - u₂
As Initial velocity is 0
v₁ = v₂
Thus, velocity of both the balls will be same when hitting the ground.
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how should you hold a handgun for maximum accuracy? high on the grip with two hands high on the grip with one hand low on the grip with two hands low on the grip with one hand
Hold the pistol high mostly on grip to ensure that such recoil is sent straight back to the arm and hands. This enables more accurate shooting and better repeat shots. When two hands are available, use them.
What does a gun's recoil mean?Simply said, recoil is the gun's response to the expression of energy that is produced in the barrel and released from the muzzle. The hammer, which is located inside the gun's receiver, depresses your firing pin only when trigger is squeezed with enough force and pop the fuse on the round's end.
Recoil movement: what is it?The recoil is a backward motion that typically results from a force or contact. A gun will recoil when it moves rearward due to momentum. Mom might retreat from shock rather than momentum after hearing about your go to the shooting range.
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determine the orbital speed of a satellite that is orbiting the earth at an altitude where the gravitational acceleration is 8.70 m/s2.
The orbital speed of a satellite that is orbiting the earth at an altitude where the gravitational acceleration is 8.70 m/s^2 is 7.68×10^3m/s.
Given the centripetal acceleration of satellite (a) = 8.70 m/s^2
The mass of earth (M) = 5.98×10^24 kg
Let the radius of satellites orbit = R
The satellites orbital speed = v
We know that the satellite's centripetal acceleration (a = v²/R ) is equal to its gravitational acceleration.
v²/R = GM/R² here G is the gravitational constant 6.674×10-11 m3⋅kg-1⋅s-2
v² = GM/R
From centripetal acceleration we have R = v²/a. Then,
v² = GMa/v²
v = (GMa)^1/4
v = (6.674×10^-11 x 5.98×10^24 x 8.70)^1/4 = 7.68×10^3m/s
Hence the orbital speed of a satellite is 7.68×10^3m/s
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gassuming the water is at rest, is the magnitude of the force of the water on the left side of the volume greater than, less than, or equal to the magnitude of the force of the water on the right side of the volume? explain your reasoning. 3. based on your answer to question a2, is the pressure at point b greater than, less than, or equal to the pressure at point c?
This is because the water is in equilibrium, meaning that the forces acting on it are balanced. In this case, the force on the left side is exerted by the water on the right side, and vice versa.
based on your answer to question a2, is the pressure at point b greater than, less than, or equal to the pressure at point c?Based on this, the pressure at point b will be equal to the pressure at point c. Pressure is defined as force per unit area, and since the magnitude of the force is the same on both sides, the pressure will also be the same.
the force of the water on the right side of the volume? explain your reasoning.It is important to note that the only assumption that can be made here is that the water is at rest. If water is in motion, the forces and pressures will be different.
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A magnetic field of magnitude 0.48 T is directed vertically upward. (a) Find the magnetic flux through a flat surface of area 19 cm2 if the surface is vertical. (b) Find the magnetic flux through a flat surface of area 19 cm2 if the surface is horizontal. (c) Find the magnetic flux through a flat surface of area 19 cm2 if the surface is at angle of 54° with the horizontal.
The magnetic flux is 9.12Wb, the magnetic flux, if the surface is horizontal, is 0, the magnetic flux in the area is 19 and angle 54 is 5.08Wb.
(a) The magnetic flux through a flat surface of area 19 cm2 if the surface is vertical can be calculated using the formula
Φ = BA, where Φ is the magnetic flux, B is the magnetic field strength, and A is the area of the surface. In this case, the magnetic flux is
0.48T ×19 cm² = 9.12 Wb.
(b) The magnetic flux through a flat surface of an area 19 cm2, if the surface is horizontal, is 0 Wb. This is because the magnetic field is directed vertically upward, so it will not be able to penetrate through a horizontal surface.
(c) The magnetic flux through a flat surface of area 19 cm2, if the surface is at an angle of 54° with the horizontal, can be calculated using the formula Φ = BAcosθ, where θ is the angle between the magnetic field and the surface. In this case, the magnetic flux is
0.48T ×19 cm²× cos(54°) = 5.08 Wb.
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The refractive index of amber is 1.55. If a ray of light enters a piece of amber at an incident angle 0.5°, what would its angle of refraction be? Give your answer to 2 decimal places.
Answer:
The angle of refraction be 3.21°
Explanation:
Let the angle of refraction = r
Given,
Angle of incidence, i = 0.5°
Refractive index of amber, n = 1.55
Refractive Index can be calculated by n = sin i/sin r
⇒ n = sin i/sin r
⇒ 1.55 = sin 0.5°/sin r
⇒ sin 0.5° = 0.0087
⇒ 1.55 = 0.0087/ sin r
⇒ sin r = 0.0087/1.55
⇒ sin r = 0.0056
⇒ r = sin−1(0,0056)
⇒ r = 3.21°
resonance is heard when the piston is 22.8 cm from the open end and again when it is 68.3 cm from the open end. (a) what speed of sound is implied by these data? (b) how far from the open end will the piston be when the next resonance is heard?
The frequency of the sound heard is the resonant frequency of the tube, which is determined by the length of the tube. The resonant frequency occurs when the length of the tube is equal to an integer multiple of one-fourth of the wavelength of the sound.
what is length ?
Length is a measurement of distance, typically used to describe the size of an object or the distance between two points. It is typically measured in meters, centimeters, millimeters, kilometers, feet, inches, and miles. In mathematical terms, length is a scalar quantity that represents the magnitude of a line segment.
Length can also be used to describe the amount of time that has passed, such as in the phrase "the length of a year." Length is an important concept in many areas of science, engineering, and mathematics, as it is used in determining the size and shape of objects, distances between points, and the rate at which things move.
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surface features of venus was mapped with a. data received from rovers on the surface b. uv imaging by the odyssey spacecraft c. data received from multiple probes sent to the surface d. radar imaging by the magellan spacecraft e. observations made from the hubble space telescope
d. radar imaging by the Magellan spacecraft
The surface features of venus were mapped with radar imaging by the Magellan spacecraft.
What was used to map Venus's surface features?Radar was used to scan the scorching surface by NASA's Magellan probe, which completed a five-year mission to Venus in 1994. Magellan observed a region with intense volcanism. The orbiter observed a surface that was geologically speaking quite young, recently altered, and dotted with long chains of high mountains.
What person or thareg is the names of the features on Venus' surface?Venus has "paterae," or craters and volcanic calderas, that are named after notable, real women. All of Venus' features—there are just three exceptions—have female names. They are Maxwell Montes, Alpha Regio, and Beta Regio, named for the early radar pioneer James Maxwell.
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with the use of the hubble space telescope, scientists recently discovered a giant runaway star. it is 90 times larger than the sun and is very hot and blue-white in color. why does the sun appear to be brighter than this runaway star when viewed from earth?
The runaway star is farther away from Earth than the sun. the sun is closer to Earth than the runaway star if it seems brighter than the star and the star is 90 times bigger than the sun.
What is a runaway star?An exceptionally high proper motion, known as a runaway star, is a star that was supposed to have been ejected from a nearby binary system when its companion star exploded supernova. Beyond the Milky Way, these runaway stars seem to be widespread, especially in massive galaxy clusters.
Astronomers have found hundreds of billions of runaway stars in the Virgo cluster. The Milky Way's sun and all of its stars are revolving around its nucleus. Although there are some little local motions within this broader stream of stars, it is largely orderly. Compared to the sun, the runaway star is closer to Earth.
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a vehicle travels at 50 mi/hr for 3 hours, then at 25 mi/hr for 30 minutes. determine the average velocity of the driver in feet per second. (68.1 fps)
The average velocity of the driver is 80.7 fps. The result is obtained by dividing the displacement by the change in time.
What is average velocity?Average velocity is the displacement or change in position of an object (∆x) divided by the change in time (∆t). It can be expressed as
V avg = Δx/Δt
Where
V avg = average velocityΔx = displacementΔt = change in timeThe formula of position can be counted as
x = vt
A vehicle travels at
v₁ = 50 mpht₁ = 3 hv₂ = 25 mpht₂ = 30 minutes = 0.5 hFind the average velocity in feet per second!
We find the position x₁ and x₂.
x₁ = v₁t₁ = 50(3) = 150 mile
x₂ = v₂t₂ = 25(0.5) = 12.5 mile
The average velocity would be
V avg = Δx/Δt
V avg = (x₁ - x₂)/(t₁ - t₂)
V avg = (150 - 12.5)/(3 - 0.5)
V avg = 137.5/2.5
V avg = 55 mph
V avg = 55 × 5280/3600 fps
V avg = 80.7 fps
Hence, the average velocity of the vehicle is 80.7 feet per second.
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why does the pull of gravity on an astronaut get weaker as the astronaut moves farther from earth
The distance is inversely proportional to the magnitude of the gravitational force. As the distance increases, the magnitude of force decreases.
What is Gravitational force?The gravitational force on an object can be defined as the force of attraction or the attractive force which attracts all the physical forms which are having some mass. Gravitational force is by far the weakest recognized natural force of all.
Since, the gravitational force is inversely proportional to the square of the separation between the force and the object distance between the two interacting objects, there is more separation distance will result in weaker gravitational forces of attraction. So, as the two objects are separated from each other, the force of gravitation attraction between them also decreases.
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a 2 kg cube of water, initially at rest, is moved upward at a velocity of 4 m/s, eventually coming to rest 300 m higher than its original position. during this process, the water's temperature decreases from 25 to 22 degc. what is the total change in energy of the cube of water? (absolute value in units of j)
The total change in energy of the cube of water is -19228.8 J.
How is energy defined ?The ability to generate a force that causes an item to move is what is meant by the definition of energy as the "power to accomplish work." Although the definition is unclear, the meaning is clear: energy is simply the force that propels things. Potential and kinetic energy are the two kinds of energy.
the solution is -
velocity is also given but if we look for final states so both times it is at rest.
Since it is rest at both positions so the change in energy = m×c×dt + m×g×dz.
Here m = 2 kg.
C = 4185.5 j/kg k.
dt = 22 - 25 = -3
dz = 300 - 0 = 300 m
Total change in energy = -25114.8 + 5886 = -19228.8 J.
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15. two identical rifles are shot at the same time and the sound intensity level is 80.0 db at a location equidistant from both rifles. what would be the sound intensity level at this point if only one rifle were shot?
The sound level of intensity would be "61.7 dB" if only one weapon were fired. Sound volume. The answer to the query is. the shooting of two identical weapons.
80 dB is how loud?A loud noise is 80 dB or more. It's comparable to the commotion on a crowded city street. It is a loud noise level, and when you're exposed to it during longer periods of time (more than 8 to 10 hours per day), it could damage your hearing.
How loud is 80 dB?Decibels are used to measure loudness (dB). Loudness grows rapidly as decibel levels climb. A 10-dB increase equals a 10-fold increase in volume. Therefore, a vacuum cleaner's 80 dB sound is 10 times higher than a phone's 70 dB sound and 100 times higher than a standard 60 dB sound.
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