In Newtonian physics, free fall refers to any motion of a body in which gravity is the only force acting on it.
What are the forces at work on a falling object?
In addition, gravity is pulling something down as it falls. The force of gravity is an unbalanced force at the beginning of the fall. As a result, the object accelerates or picks up speed. It runs into aerodynamic drag or air resistance as it accelerates.
What is the force responsible for an object falling to the ground?
All objects on Earth experience weight, or a gravitational pull that is proportional to their mass and is imposed by the planet's mass. Gravity is measured by the acceleration that it gives to freely falling objects. At Earth's surface the acceleration of gravity is about 9.8 metres (32 feet) per second per second.
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what direct current will produce the same amount of thermal energy, in a particular resistor, as an alternating current that has a maximum value of 2.45 a? enter the magnitude of the direct current (in units of amps) in the box given below.
To provide the same amount of heating power as an alternating current with a peak value of 3.5 A, a given resistor has to have a direct current running through it of around 2.5 A.
In a series circuit, there is only one channel for electrons to take, hence the current is the same magnitude all the way around the circuit. A series circuit's total current is equal to the current flowing through all of its resistances.
The value of a sinusoidal voltage (or any other time-varying voltagerms )'s value is equal to the value of a dc voltage that generates an equivalent quantity of heat (power dissipation) as a result of the circuit current flowing through a resistance.
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What does gravitational potential energy depend on?; What three things does gravitational potential depend on?; Does the gravitational potential energy of an object depends on the path?
The Gravitational potential energy depends on mass , acceleration and path and potential also as G=V/m.
a). As you can imagine, gravitational energy is the energy associated with gravity. This is the potential energy stored due to an object being in a higher position compared to a lower position. (e.g. far from the ground or close to the ground).
Gravitational energy is the energy associated with gravity.
b). Systems can increase their gravitational energy as their mass moves away from the center of the Earth and away from other bodies (such as the sun, planets, and stars) large enough to generate a large amount of gravity. there is.
Potential energy can be defined as the amount of work expended to lift an object from the ground to its current height. In another sense, this is the amount of work the body does before returning to ground level (the position of maximum stability) when translated from its current level. Therefore, potential energy can be related to work.
c). A negative sign indicates that gravity is doing positive work as the mass approaches. A negative potential indicates a bonding state. That is, when mass is placed under its influence, it becomes trapped in its potential, and if something can provide the energy to escape the clutches of gravity, it must not escape.
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Two blocks (X and Y) are in contact on a horizontal frictionless surface. A 36-N constant force is applied to X as shown. The force exerted by X on Y is:
D 30 N F = ma yields 36N = 24kga, or a 1.5m/s2 acceleration. Due to the 4kg block's contact force, the 20kg block is accelerating. 20 kg at 1.5 m/s2 contact equals 30 N.
What is accelerating?
In mechanics, acceleration refers to the rate at which an object's velocity with respect to time varies. They are accelerations and vector quantities.
The direction of an object's acceleration is determined by the direction of the net force acting on it.
Due to the 4kg block's contact force, the 20kg block is accelerating. 20 kg at 1.5 m/s2 contact equals 30 N.
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What is the only force acting on a freely falling object?
The gravitational force is the sole external force acting on an object falling through a vacuum.
What forces are at play when something is falling?A fall also involves the force of gravity pulling an object downward. The force of gravity is imbalanced at the beginning of the descent. The result is that the thing picks up speed or accelerates. It experiences aerodynamic drag or air resistance as it speeds.
What is a free fall's force?
As the only force acting on an object that is falling freely is the downward-acting force of gravity, the object feels weightlessness. The item accelerates at a rate equal to that of gravity. The object is subject to zero net force.
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9. after a nice dinner around the campfire on a camping trip, you and a friend decide to get away from the fire to observe the stars. as you get farther and further away, you see the brightness of the fire:
Decrease as the distance squared after a nice dinner around the campfire on a camping trip, you and a friend decide to get away from the fire to observe the stars. as you get farther and further away.
The amount of thermal energy that a huge fire has transferred is more than that of a little fire, thus you must stand closer to a small fire to feel the same warmth you do when you are farther away. The reaction generates a lot of thermal energy in a huge fire. Less thermal energy is released from the reaction in a tiny fire.
When the temperature rises, a type of energy called thermal energy is produced. The amount of thermal energy is directly inversely proportional to the object's change in temperature. Thermal energy takes the form of heat.
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Consider the following statement: The magnitude of the buoyant force is equal to the weight of fluid displaced by the object. Under what circumstances is this statement true? a. for every object submerged partially or completely in a fluid b. only for an object that floats c. only for an object that sinks d. for no object submerged in a fluid
The amount of fluid the object displaces equals the buoyant force's magnitude.This really is true for any object that is partially or entirely submerged in a fluid.
Whatever happens to the an object when its weight and buoyant force are the same?The object can stay suspended at its current depth if the hydrostatic pressure is equal to its weight.Regardless of whether an object floats, falls, or is held in a liquid, the hydrostatic pressure is constantly at work.
How much of a force does buoyancy exert on an item submerged in fluid?The mass of the fluid that an object displaces determines the size of the buoyancy force acting on it.
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which of the following is the most important reason to astromomers for studying asteroids, comets, and dwarf planets?
The most important reason astronomers for studying asteroids is to trace solar system evolution.
what are asteroids?Small, stony objects called asteroids orbit the Sun. Despite orbiting the Sun similarly to planets, asteroids are far smaller than planets. Small, stony objects called asteroids orbit the sun. Despite orbiting the sun similarly to planets, asteroids are far smaller than planets.
What are comets called?Depending on whether a comet has more ice or rocky debris, scientists may refer to them as dirty cannonballs or snow dirtballs, according to NASA. Amazing images of Comet NEOWISE taken from space and the Earth are related.
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Figure shows objects with charges. Show from which object the electrons flows. State why. In
which of these figures do you get a static electric spark? Draw the spark on the figure.
It is to be noted that the electron flows occur in Figures (a) and (d).
What is the rationale for the above answer?The total number of electrons in the left plate is equal to the total number of positive charges in the right plate in Figure (a). As a result, no electron flow occurs here. A static electric spark does not occur.
The left plate in Figure (b) has three negative charges and three positive charges. The right plate, on the other hand, has five negative charges and one positive charge. As a result of the neutralization effect, the plates now have additional negative charges. As a result of the extra electrons present, a static electric spark occurs.
The identical thing happens in Figure (c) as it does in Figure (b). As a result, an entire static electric spark happens here as well. The complete negative charges on the right plate are flowing toward the ground in Figure (d). As a result, the left side plate has total negative charges while the right side plate has total positive charges.
As a result, we can see that the electrons flow in Figures (a) and (d). While figures (b) and (c) show static electric sparks.
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Full Question:
See attached image
Explain why the Earth has 24 time zones.
Answer:
because it is a certain time created by God.
A 17.0-m-high and 11.0-m-long wall under construction and its bracing are shown in Figure 9.32. The wall is in stable equilibrium without the bracing but can pivot at its base. Calculate the force exerted by each of the 10 braces if a strong wind exerts a horizontal force of 630 N on each square meter of the wall. Assume that the net force from the wind acts at a height halfway up the wall and that all braces exert equal forces parallel to their lengths. Neglect the thickness of the wall.
The force exerted by each of the 10 braces is 2.0534 x 10⁴ N.
The force is defined as the shear stress or pressure applied per unit area.
Mathematically, F = P/ASI unit of force is Newton (N).The wall is 17.0-m-high and 11.0-m-long
Its bracing is under construction
The force is exerted by each of the 10 braces, if a strong wind exerts a horizontal force of 630 N on each square meter of the wall.
Let the net force from the wind acts at a height halfway up the wall and that all braces exert equal forces parallel to their lengths.
Considering the pivot at the base of wall.
From the equilibrium of forces, we have
r₁ * Fwind = r₁ * Fbsinθ
By substituting the values,
Fb = Fwind /10sin35°.............(1)
The wind force is also given by
Fwind = Horizontal force or pressure * Area
Fwind = F/A * hw
Fwind = 630 x 17 x 11
F wind = 117810 N
From equation (1), we have
Fb = Fwind /10sin35°
Fb = 117810 /10sin35°
Fb = 20539.54 N
0r Fb = 2.0534 x 10⁴ N
Thus, the force exerted on each of the 10 braces is 2.0534 x 10⁴ N.
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❧ What are Convex Mirrors?
❧ What are Concave Mirrors?
Answer:
Spherical mirrors whose inner side is reflecting are called concave mirrors. Spherical mirrors whose outer side is reflecting are called convex mirrors.
Explanation:
Four small spheres, each of which you can regard as a point of mass 0.200 kg, are arranged in a square 0.400 m on a side and connected by light rods.a. Find the moment of inertia of the system about an axis through the center of the square, perpendicular to the plane.b. Find the moment of inertia of the system about an axis connecting two opposite sides of the square.c. Find the moment of inertia of the system about an axis that passes through the centers of the upper left and lower right sphere and through the center of the square.
The moment of inertia of the system about an axis through the center of the square, perpendicular to its plane is [tex]$0.0636 \mathrm{~kg}-\mathrm{m}^2$[/tex].
What is moment of inertia?
The moment of inertia, otherwise known as the mass moment of inertia, angular mass, second moment of mass, or most accurately, rotational inertia, of a rigid body is a quantity that determines the torque
Given data:
The mass of each sphere is, [tex]$m=0.200 \mathrm{~kg}$[/tex].
Length of side of square is, [tex]$L=0.400 \mathrm{~m}$[/tex].
The expression for the moment of inertia of the system about an axis through the center of the square, perpendicular to its plane is,
[tex]$I=4 m R^2$[/tex]
Here,
[tex]$\mathbf{R}$[/tex] is the distance between center of the square and the sphere. And its value is,
[tex]$$\begin{aligned}& R=\frac{1}{2} \sqrt{L^2+L^2} \\& R=\frac{1}{2} \sqrt{0.400^2+0.400^2} \\& R=0.282 \mathrm{~m}\end{aligned}$$[/tex]
Then, moment of inertia is,
[tex]$$\begin{aligned}& I=4 \mathrm{~m} R^2 \\& I=4 \times 0.200 \times 0.282^2 \\& I=0.0636 \mathrm{~kg}-\mathrm{m}^2\end{aligned}$$[/tex]
Thus, the moment of inertia of the system about an axis through the center of the square, perpendicular to its plane is [tex]$0.0636 \mathrm{~kg}-\mathrm{m}^2$[/tex].
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the lithosphere can be thought of as tending to rise or sink gradually until it is balanced by the displaced asthenosphere. according to this model, a mountain range will have a mountain _____________ that extends deep into the mantle
The Mountain range will have a mountain deep that extends deep into the mantle.
A mantle is a layered interior of a planetary frame bounded underneath through a core and above by using a crust. Mantles are made of rock or ice and are commonly the largest and most massive layer of the planetary body.
It's far more frequently solid rock, but less viscous at tectonic plate obstacles and mantle plumes. Mantle rocks there are smooth and able to pass plastically at great depth and stress. The transfer of heat and material in the mantle helps decide the panorama of Earth.
The basic styles of mantle substances consist of stone, vintage, timber, and forged stone.
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A rotating wheel accelerates at a constant rate from an angular speed of 24 rad/s to 36 rad/s in a time interval of 3 s. What is the angle in radians through which the wheel rotates?
The angle in radians through which the wheel rotates is [tex]14207.511^{\circ}[/tex].
What is angular velocity?
In physics, angular velocity or rotational velocity, also known as angular frequency vector, is a pseudovector representation of how fast the angular position or orientation of an object changes with time.
Given
initial angular velocity [tex]$\omega_1=25 \mathrm{rad} / \mathrm{s}$[/tex]
Final Angular velocity [tex]$\omega_2=36 \mathrm{rad} / \mathrm{s}$[/tex]
time interval [tex]$t=3 \mathrm{~s}$[/tex]
using
[tex]$$\begin{aligned}& \omega_2=\omega_1+\alpha t \\& 36=25+2 \\& \alpha=1.5 \mathrm{rad} / \mathrm{s}^2\end{aligned}$$[/tex]
(b)Average angular speed [tex]$\frac{\Delta \theta}{\Delta t}$[/tex]
[tex]$$\begin{aligned}& \theta=\omega_1 t+\frac{1}{2} \alpha t^2 \\& \theta=25 \times 8+\frac{1}{2} \times 1.5 \times 8^2 \\& \theta=200+48=248 \mathrm{rad}\end{aligned}$$[/tex]
average angular speed [tex]$=\frac{\Delta \theta}{\Delta t}$[/tex]
[tex]=\frac{248}{8}=31 \mathrm{rad} / \mathrm{s}$$[/tex]
(c)Angle rotated =248 radians
(d)angles in degree [tex]$=14207.511^{\circ}$[/tex]
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A thermos contains m1 = 0.89 kg of tea at T1 = 31° C. Ice (m2 = 0.075 kg, T2 = 0° C) is added to it. The heat capacity of both water and tea is c = 4186 J/(kg⋅K), and the latent heat of fusion for water is Lf = 33.5 × 104 J/kg. show answer No Attempt 50% Part (a) Input an expression for the final temperature after the ice has melted and the system has reached thermal equilibrium.Part (b) What is the final temperature in Kelvin?
The final temperature in Kelvin was 295.52 K.
Explain about the temperature in Kelvin?The difference between a kelvin (K), a division of the kelvin scale, and a degree on the Celsius scale is where zero is. The zero point on the Kelvin scale is at absolute zero, while the zero point on the Celsius scale is the freezing point of water. As a result, 0oK is equivalent to -273.15oC, while 0oC is equivalent to 273.15 kelvins.
The Standard International (SI) unit of thermodynamic temperature is the kelvin, which is also sometimes referred to as the degree Kelvin (symbol, o K). The formal definition of a kelvin is 1/273.16 (3.6609 x 10 -3) of the thermodynamic temperature of pure water's triple point (H 2 O).
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according to general relativity, the presence of matter curves spacetime and therefore time slows down in a gravitational field. time is universal. time is different for every object. none of the above
General relativity states that the existence of matter bends spacetime, which causes time to slow down in a gravitational environment.
Explain the term general relativity?It is, in essence, a theory of gravity. The fundamental assumption is that gravity is a bending or curving of space rather than an invisible force which draws items together.
An item warps the space surrounding it more dramatically the more large it is.According to Einstein's general theory of relativity, matter or energy causes a distortion of space (or more specifically, spacetime) known as gravity. A large item produces a gravitational field by distorting the geometry of the spacetime it is located in.Thus, general relativity states that the existence of matter bends spacetime, which causes time to slow down in a gravitational environment.
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The magnetic field inside a 4.0cm diameter superconducting solenoid varies sinusoidally between 8.0T and 12.0T at a freqency of 10Hz.
a) what is the maximum electric field strength at a point 1.5cm from the solenoid axis?
b) What is the value of B at the instant E reaches its maximum value
E max = 0.942 V/m is the maximum electrical field amplitude at a position 1.5 cm away from the solenoid axis.
An electric field is what?The physical force that surrounds ionised objects and exerts force on every other energetic particles with in field, either attracting of repel them, is known as an electric field (or E-field). It can also refer to a collection containing charge particles' physical field.
Briefing
Diameter, D, equals 4 cm = 400 parts per million m
R = d/2 ≈ 0.04/2 = 0.02 metres for the circumference.
The electric potential is provided by Faraday's law;
Frequency; f = 10 Hz
From Faraday’s law, the electric field is given by;
E = -(r/2)(dB/dt)
We can formulate the magnetic field's equation as follows based on the magnetic field's variation:
B(t) = B_c + B_o*sin (2πft)
B(t) = 2sin(2*10t) + 10
Thus;
dB/dt = 40π cos 20πt
When cos 20t = -1, the electric field is at its maximum value.
(dB/dt)_max = -40π
Thus, with respect to the solenoid axis, at r = 1.5 centimeter = 0.015 m, we obtain;
E = -(0.015/2) × -40π
E = 0.942 V/m
(100 Points) Three resistors of 100, 40.0, and 10.0 Ohms are in series with a 24.0 V power supply. What is the voltage drop across the 40.0 Ohm resistor?
(Unit= V)
Answer:
6.4 V
Explanation:
You have a series circuit of three resistors and a 24 V power supply. You want to know the voltage across the 40 Ω resistor, when the other two resistors are 100 Ω and 10 Ω.
Voltage dropThe fraction of total voltage in a series circuit that is dropped across any resistor is the ratio of that resistor value to the total resistance in the circuit. The voltage drop across a 40 Ω resistor in a circuit with a total resistance of 150 Ω is ...
(24 V)(40/150) = 32/5 V = 6.4 V
for light of wavelength 589 nm, calculate the critical angle for fused quartz when surrounded by water.
The critical angle for the following materials surrounded by air is a) θc = 44.21⁰.
b) θc = 41.14⁰
c) θc = 40.36⁰
What is critical angle ?
The angle of incidence at which the angle of refraction equals 90 degrees is known as the critical angle. When light enters a denser media from such a comparatively rarer medium, the orientation of light changes as well as the light beam bending towards the normal.
sin θ = n2/n1
For air,
n₂ = 1
so,
sin θ = 1/n1
(a) fluorite : n₁ = 1.434⁰
sin θ = 0.697 θc = 44.21⁰.
(b) crown glass: n₁ = 1.52⁰
sin θ = 0.657 θc = 41.14⁰.
(c) sodium chloride : n₁= 1.544⁰
sin θ = 0.647 θc = 40.36⁰.
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How to find the net force of on an object?
Answer:
Look for the formula!
Explanation:
the net force formula is FNet = Fa + Fg + Ff + FN.
FN is the force acting on a body.
here are the hints to find one in the future!
Fa is applied force,
Fg is the gravitational force,
Ff is the frictional force,
FN is a normal force.
At temperatures near room temperature, the temperature dependence of the conductivity for intrinsic germanium is found to be given by o = CT-3/2 exp(- 2KT where C is a temperature-independent constant and T is in Kelvins. Using the above equation to calculate the intrinsic electrical conductivity of germanium at 175 °C
Df/dp<0 means rate of change of decomposition with respect to pressure increase with increasing pressure.
4f^2p/(1-f^2)= k
4f^2p=k(1-f^2)
Taking derivative with respect to p
D/dp(4f^2p)=d/dp(k(1-f^2))
4f^2+8fpdf/dp=-2kfdf/dp
(K+4p)df/dp=-2f
Df/dp=-2f/k+4p
Form eq 4f^2p/1-f^2=k
4f^2p=k(1-f^2)
F^2= k/4p+k
Put it in last eq we can say that df/dp <0
Step 1: Calculate the temperature in Kelvins. To do this, add 273.15 to the given temperature in Celsius:
T = 175 + 273.15 = 448.15 K
Step 2: Calculate the temperature-independent constant C. This can be found by plugging in the given temperature (in Kelvins) and conductivity (o) into the equation:
o = CT-3/2 exp(- 2KT
C = o / (T-3/2 exp(- 2KT))
Step 3: Plug in the values for T and C into the equation and solve for the conductivity (o):
o = CT-3/2 exp(- 2KT
o = (C)(448.15)-3/2 exp(- 2K(448.15))
o = (C)(448.15)-3/2 exp(- 896.3K)
o = (C)(448.15)-3/2 (5.5 x 10-395)
o = (C)(2.48 x 10-397)
Therefore, the intrinsic electrical conductivity of germanium at 175 °C is
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A barbell consists of two small balls, each with mass m at the ends of a very low mass rod of length d. The barbell is mounted on the end of a low-mass rigid rod of length b. This apparatus is started in such a way that while the rod rotates clockwise with angular speed , the barbell rotates clockwise about its center with an angular speed wg. What is the total angular momentum of this system about point B?
The total angular momentum of the system about point B is [tex]L=m_1r_1\omega_1+m_2r_2\omega_2[/tex]
Angular momentum, also known as moment of momentum or rotational momentum, is the rotating counterpart of linear momentum.
A rigid object's angular momentum is defined as the product of its moment of inertia and its angular velocity. If there is no external torque on the object, it is analogous to linear momentum and is subject to the fundamental constraints of the conservation of angular momentum principle. The vector quantity angular momentum It is derived from the expression for a particle's angular momentum.
Given,
mass of ball 1 = m1
m₂ mass of ball 2=m2
v₁ is the velocity of ball=r₁ω₁
v₂ is the velocity of ball 2=r₂ω₂
The total angular momentum is given as;
[tex]V_{total}=r_1\omega_1+r_2\omega_2\\\\L=m_1r_1\omega_1+m_2r_2\omega_2[/tex]
Hence the total angular momentum will be [tex]L=m_1r_1\omega_1+m_2r_2\omega_2[/tex]
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A ball is held at rest at some height above a hard, horizontal surface. Once the ball is released it falls, hits the surface, and starts bouncing vertically up and down. Suppose that with each bounce the ball loses a fixed fraction p (with 1>p>0) of its energy. This loss could be due to a number of reasons (inelasticity, drag, etc) that are left unspecified.How many times will the ball bounce before coming to rest (if at all)? Provide a detailed explanation of your reasoning, not simply a one-line answer.How long will it take for the ball to come to rest (if at all)? Give your answer as a formula that contains as variables only p and the time T1 from the moment that the ball was released to the first contact with the horizontal surface.
It can never theoretically become 0. After n bounces, it may be closer to 0 or extremely tiny, depending on the precise values of p and T1.
Briefing:initial height dropped =h = gT12/2
T1 - time from the moment that the ball was released to the first contact with the horizontal surface.
initial energy T = mgh
after first bounce energy loss = mghp
height it will raise after first bounce mgh1 = mgh(1-p)
after each bounce its energy is reduced by p
after n bounces it will raise to a height
mghn=mgh(1-p)n
hn= h(1-p)n = gT12/2 *(1-p)n
gT₁² (1-p)n/2
Theoritically hn can never become 0. It can be closer to 0 or can be negligibly small after n bounces, depending on the actual values of p and T1 .
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I have multiple voltage sources of different rating like 5V,6V,1V and 20V draw schematic diagram using these sources to power a light of rating 11 volt
Answer:
add molecules
Which force is greater when a bug hits a windshield?
Answer:
Below
Explanation:
The forces are equal..but opposite........the bug just doesn't handle it as well
How many possible outcomes are there in rolling a spinner 1 to 8?; What is the probability of spin an even number on a 1 to 8 spinner?; What is the probability of getting a prime number in spinner with numbers 1/8 is spun?; How many different outcomes are possible for spinning the spinner and tossing the coin?
The probability of getting a prime number ( 2, 3, 5, 7) between 1 to 8 is 1/2. The total outcomes possible for spinning the spinner and tossing the coin is 16.
What is probability?Branch of mathematics concerning numerical descriptions of how likely an event is to occur is called probability.
Total number of outcomes = 8.
Let, the probability of getting a prime number ( 2, 3, 5, 7) between 1 to 8
P(E) = (no. of outcomes) /( total no. of outcomes)
=4/8
=1/2
When a coin is tossed, there are two possible outcomes that are H(head), and T(tail).
If you spin the spinner , there are 8 possibilities.
Total outcomes = 8 * 2
=16
There are 16 outcomes, when spinning a spinner numbered from 1 to 8 and tossing a coin.
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According to the video, which of the following is not a tool that scientists use to monitor air pollution?
thermometer
The following is not tool that scientists use to monitor air pollution is the thermometer.
Air quality is measured using the Air Quality Index or AQI. AQI works like a thermometer with a range of 0-500 degrees. However, AQI is a way of showing changes in the amount of air pollution, not changes in temperature. Avoid using petrol-powered lawns and gardening supplies.
Motor vehicle emissions of fuel oil and natural gas used to heat homes by-products of manufacturing and power generation especially coal-fired power plants and smoke from chemical production are major sources of man-made air pollution. This is the main cause. Reduce the number of trips by car. Reduce or eliminate the use of fireplaces and wood stoves. Do not burn leaves garbage or other objects.
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Can someone help me find F2
The net electric force on particle q₂ is determined as -9.86 N.
What is the net force of particle q₂?The net force of particle q₂ is determined by applying Coulomb's law of electrostatic force.
The electric force between particle q₁ and q₂ is the repulsive force and the magnitude is calculated as;
F₁₂ = kq₁q₂ / r²
where;
K is the Coulomb's constantq₁ is the magnitude of charge 1q₂ is the magnitude of charge 2r is the distance between charge 1 and charge 2F₁₂ = -(9 x 10⁹ x 13 x 10⁻⁶ x 7.7 x 10⁻⁶) / (0.25²)
F₁₂ = -14.4 N
The electric force between particle q₃ and q₂ is the attractive force and the magnitude is calculated as;
F₂₃ = kq₃q₂ / r²
F₂₃ = (9 x 10⁹ x 5.9 x 10⁻⁶ x 7.7 x 10⁻⁶) / (0.3²)
F₂₃ = + 4.54 N
The net force on the particle q₂ is calculated as;
F (net) = F₁₂ + F₂₃
F (net) = -14.4 + 4.54
F (net) = -9.86 N
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a large raindrop--the type that lands with a definite splat--has a mass of 0.014 gg and hits your roof at a speed of 8.1 m/sm/s.
The magnitude of the impulse that was transmitted to your roof is 1.134 x 10⁵ kg/m/s.
How would you define magnitude?In physics, size is simply described as "distance or quantity." It reflects the absolute or absolute motion the size in which an item moves in the idea of motion. It is utilized to define something's size or extent. Size in physics generally relates to a size or quantity.
Briefing:The impact's force is 0.0307 N in magnitude.
The parameters are as follows: raindrop mass,
m = 0.0014 g = 0.0014 x 10³ kg
raindrop speed, v = 8.1 m/s
raindrop motion, t = 0.37 ms.
The roof impulse is calculated using the formula below:
J = ΔP = mv
J=(0.0014*)*(8.1)\sJ= 1.134* 10⁵ kg.m/s
The following methods are used to calculate the force of impact using Newton's second law of motion:
F=ma
N=0,0307 F=(mv)/t
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The complete question is -
A large raindrop--the type that lands with a definite splat--has a mass of 0.014 g and hits your roof at a speed of 8.1 m/s. part a what is the magnitude of the impulse delivered to your roof? express your answer with the appropriate units.
An inexperienced researcher runs an experiment and sets his alpha level at .40 because he can't wait to get his firstsignificant result.While he may indeed get a significant result, what are the potential problems?
A potential problem is that you are willing to accept a 5% chance of being wrong if you reject the null hypothesis.
The significance level is the probability of rejecting the null hypothesis if it is true. For example, a significance level of 0.05 indicates a 5% risk of concluding that there is a difference when there is actually no difference. Rejecting the true null hypothesis results in a Type I error.
The smaller the value of α the more difficult it is to reject the null hypothesis. Therefore, choosing a low value for α can reduce the likelihood of Type I errors. The result here is that if the null hypothesis is false, it may be more difficult to reject using a lower value for α. The alpha value or statistical significance threshold is arbitrary. Which value to use depends on your field of study.
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