A pivoted beam supports a load P at one end and a load Q at the other end.

The weight of the beam can be ignored.


30 cm 70 cm


P Q


pivot


The beam is balanced.


Which row gives possible values for P and for Q?


P/N Q/N


A 21 7


B 21 9


C 30 10


D 30 70

In order to predict how the force will affect the 2 kg object moving at 10 m/s which has a 4 N force applied to it, it is necessary to determine the acceleration of the object using the formula; f = ma

Where; f = force applied, m = mass of the object,  a = acceleration of the object

On substituting the given values;4 N = 2 kg x aa = 2 m/s²

The acceleration is calculated as 2 m/s².

Force is a physical quantity that describes the interaction between objects and causes them to accelerate or deform. It is a vector quantity, which means that it has both magnitude and direction and force can be thought of as a push or pull exerted on an object.

Therefore, the 4 N force applied to the object will cause the object to accelerate at 2 m/s².

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Answer:

Hi, there your answer is False

Explanation:

for example

1. drinking water at least after 1 hour beacuse if we immediately drink water just after meal it dilutes the HCL produced in our stomach which hinders the digestion process

2.picking up tomatoes for salads which contains oxalic acid

3.Cutting apples which contains malic acid with knife then after sometimes it will trun into brown due to oxidation of iron present in a apple.

A few examples of real science that demonstrate how scientific research and exploration contribute to our understanding of the world around us are the Human genome project, Mars exploration, and Climate Change Studies.

Human Genome Project:

The Human Genome Project (HGP) is a real scientific endeavor that aimed to map and sequence all the genes in the human genome. It involved an international collaboration of scientists and researchers to understand the genetic makeup of humans.

Mars Exploration:

Various space agencies, such as NASA and ESA, have conducted real scientific missions to explore Mars. Rovers like Curiosity and Perseverance have been sent to the Martian surface to study its geology, and atmosphere, and search for signs of past life.

Climate Change Studies:

Climate change research is an ongoing scientific field that investigates the causes and effects of global climate change. Scientists collect and analyze data from various sources, including satellite observations, weather stations, and ice core samples, to study trends and changes in Earth's climate over time.

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Answer: 1. Liquid, molecules aren't packed very closely, and take the shape of the bottom of the container 2. Gas molecules are far apart and fill the container completely

Explanation:

The path of the plane is given by the equation y = 0.01 x²The plane is rising with a constant velocity of 10 m/s along the y direction. Altitude of the plane when it reaches the destination is y = 100 m.

To determine the velocity vector of the plane when it reaches an altitude of 100m, we can use the following formula: V = (dx/dt)i + (dy/dt)j where V is the velocity vector, i and j are the unit vectors in the x and y directions, and dx/dt and dy/dt are the rates of change of x and y with respect to time.

Given, y = 0.01 x² …..(1)

Differentiating with respect to time, we get

dy/dt = 0.02x * dx/dt

Let the plane's velocity be V1 = 10 m/s along the y-axis at all points of time.

Substituting the value of dy/dt = 10 m/s and y = 100 m in equation (1),

we get,100 = 0.01 x²

⇒ x² = 10,000

⇒ x = 100m

Hence, when the plane reaches an altitude of 100 m, it is 100 m away from the origin along the x-axis.

To find the velocity vector, V, of the plane when it reaches an altitude of 100 m, we need to find dx/dt at x = 100 m.

Substituting x = 100 m and

dy/dt = 10 m/s in equation (2),

we get,10 = 0.02 * 100 * dx/dt

⇒ dx/dt = 5 m/s

Therefore, the velocity vector of the plane when it reaches an altitude of 100 m is given by,

V = (dx/dt)i + (dy/dt)j

= (5 m/s)i + (10 m/s)j

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Answer:

R= v/I

R= 9/1.05=8.5714 ohms

The ball continues to fall, its kinetic energy will increase.

Kinetic energy is the energy an object possesses due to its motion. It is the energy associated with an object’s speed and mass, and is the energy that an object has because of its movement. Kinetic energy can be converted into other forms of energy, such as heat, light, or sound. It can also be used to do work, such as moving objects or powering machines. Kinetic energy is a form of mechanical energy, which is energy that is associated with the motion or position of an object. Kinetic energy is related to the work done on an object, and it increases as the object’s speed increases. Kinetic energy can be calculated using the formula KE = ½mv2, where m is the mass of the object and v is the velocity of the object.

The kinetic energy of the ball will increase as it falls, because it is gaining speed due to gravity.
As it falls, it accelerates at a rate of 9.8 m/s^2, and its kinetic energy is equal to its mass multiplied by the square of its velocity.
Therefore, as the ball continues to fall, its kinetic energy will increase.

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Answer:

500; 300 feet.

Explanation:

A turn signal lamp can be defined as an amber blinking lamp which indicates a driver's intent to change direction. It is extremely important that drivers gives a turn signal (flashing light) on the side toward which he or she is turning either left or right.

Simply stated, the turn signal lamp indicate the driver's intent to turn either leftward or rightward by displaying flashing lights to the front and rear of his or her vehicle.

A turn signal lamp must be visible in normal sunlight at a distance of at least 500 feet from the front and rear of the vehicle if the vehicle is at least 80 inches wide, and at least 300 feet from front and rear of the vehicle if the vehicle is less than 80 inches wide according to the transportation traffics code.

Answer:

Answer:

The soprano's singing matched the natural frequency of the glass, causing it to vibrate. The strong vibrations caused the glass to shatter.

Explanation:

edg 2020

Answer:

a.    -For example, when you go to the supermarket with your parents and they let you drive the cart. You step on the back and push off which lets you get far in the isle, but in a bit you start slowing down

and eventually stop at all.

b. -First, when a car is driving the wheels meet friction all the time, as that happens the wheels get a bit hot.

-Second, when you are cold you rub your hands together fast until they are warm.

c.-First, you wouldn't be able to land an airplane correctly and it would be very, very hard to stop it from moving, as well as the car .

-We wouldn't be able to ice skate, we wouldn’t be able to slow down and turn normally.

Explanation:

(a) Friction is the force that opposes the rubber tyre from sliding on the road surface. This friction avoids skidding of vehicles. Applications of breaks in the vehicle to stop it- Friction braking is the most widely used braking method in vehicles.

(b) When surfaces in contact move relative to each other, the friction between the two surfaces converts kinetic energy into thermal energy (that is, it converts work to heat). This property can have dramatic consequences, as illustrated by the use of friction created by rubbing pieces of wood together to start a fire.

(c)

"Force that resists the sliding or rolling of one solid object over  another." Frictional forces, such as the traction needed to walk without slipping, may be beneficial, but they also present a great measure of opposition to motion.

"Kinetic energy is a form of energy that an object or a particle has by reason of its motion." If work, which transfers energy, is done on an object by applying a net force, the object speeds up and thereby gains kinetic energy.

"Thermal energy refers to the energy contained within a system that is responsible for its temperature." Heat is the flow of thermal energy. A whole branch of physics, thermodynamics, deals with how heat is transferred between different systems and how work is done in the process.

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Answer:X = hor = 4 + (-5) = -1N.

Y = ver = 10 + (-6)

R = sqrt(x^2+y^2) = sqrt(1+16) = 4.12

tanA = Y / X = 4 / -1 = -4,

A = -76 deg, CW = 180-76 = 104 deg =

Explanation:

Answer:

What she can do to collect the data is;

B. Gather a few oranges and see how many seeds are in each

Explanation:

The quantity Katie wants to find out is the number of seeds contained in each orange

Therefore, the required population = The number of seeds in a given orange

The method of estimation of the number of seeds per orange is sampling method, whereby the number of seeds in each of the orange in the sample is used to as an hypothesis as to the number of seeds expected in each orange of the entire population.

Therefore, in order to collect the data, she can gather a few oranges and see how many seeds are in each.

The net force on particle q₃ is approximately 2576.08 N.

To calculate the net force on particle q₃, we need to consider the forces exerted on it by particles q₁ and q₂ due to their electrostatic interactions.

The electrostatic force between two charged particles can be determined using Coulomb's law, which states that the force between two charges is directly proportional to the product of their charges and inversely proportional to the square of the distance between them. Mathematically, the formula for the electrostatic force (F) is:

F = (k * |q₁ * q₂|) / r²

Where k is the electrostatic constant (k ≈ 8.99 × 10^9 N m²/C²), q₁ and q₂ are the charges of particles q₁ and q₂, and r is the distance between them.

First, let's calculate the force between q₁ and q₂:

F₁₂ = (8.99 × 10^9 N m²/C² * |-75.8 μC * 90.6 μC|) / (0.876 m)²

Plugging in the values:

F₁₂ ≈ (8.99 × 10^9 N m²/C² * 6.87508 μC²) / (0.876 m)²

≈ 563.78 N

Next, let's calculate the force between q₂ and q₃:

F₂₃ = (8.99 × 10^9 N m²/C² * |90.6 μC * -84.2 μC|) / (0.432 m)²

Plugging in the values

F₂₃ ≈ (8.99 × 10^9 N m²/C² * 7.62012 μC²) / (0.432 m)²

≈ 3139.86 N

To find the net force on q₃, we need to subtract the force F₁₂ from F₂₃:

Net Force = F₂₃ - F₁₂

= 3139.86 N - 563.78 N

≈ 2576.08 N

Therefore, the net force on particle q₃ is approximately 2576.08 N.

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Answer:

A ( Jack did twice as much work as Jill

Explanation:

The horizontal component of velocity is

(22 m/s) • cosine(62°).

The vertical component of velocity is

(22 m/s) • sine(62°).

These are the original components, right after the kick. As time goes on, the horizontal one doesn't change. But the vertical one gets bigger and bigger, because gravity is accelerating the ball downward.

That's the complete story of projectile motion.

Answer:

it is b on edge not d, well atleast for me it was b

Explanation:

Answer:

B) one battery, two switches, and three light bulbs

Explanation:

Answer:

power

power is the rate of doing work. It is equivalent to an amount of energy consumed per unit time. In the SI system, the unit of power is the joule per second (J/s).

The tension in the rope is equal to the weight of the box when lowering it at a constant speed.

When you lower a box attached to a rope straight down at a constant speed, the tension in the rope must equal the weight of the box. This is due to the equilibrium of forces acting on the box.

The weight of the box, which is the force exerted by gravity, pulls the box downward. To counteract this downward force and maintain a constant speed, the tension in the rope must match the weight of the box.

In this scenario, the tension in the rope is the force that is transmitted from your hand to the box through the rope. When the box is at a constant speed, it means that the net force acting on the box is zero.

The tension in the rope must balance out the weight of the box to achieve this equilibrium. If the tension is less than the weight of the box, the box would accelerate downward. Conversely, if the tension is greater than the weight, the box would accelerate upward.

By adjusting the tension in the rope to match the weight of the box, you can lower it at a constant speed without any acceleration. This principle is important to ensure stability and control when manipulating objects using ropes or cables.

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Answer:

The ones that are after the light that went out are also out.

Explanation:

Answer:

they all go out

Explanation:

they are wired together so they all go out. i am an electrician.

Answer:

Net force = 125N

Explanation:

Let the two forces be A and B respectively.

Given the following data;

Forward force, A = 150N

Backward force, B = 275N

To find the net force;

Since the two forces are acting in opposite directions, we would subtract them to get the net force.

Net force = B - A

Net force = 275 - 150

Net force = 125N

Answer:

Mercury is a metal that is used in

Mercury can be seen as an evening "star" near the sun's setting point or as a morning "star" near the sun's rising point. The evening star was given the name Hermes, and the morning star was given the name Apollo, since the ancient Greeks thought they were two separate things. Mercury, the Roman god's messenger, is the planet's name.

Answer:

Male sperm

Female egg

Explanation:

Answer:

for the last part, they would form a new organism

Explanation:

The two haploid cells will fuse together to form a diploid cell called a zygote.

The color of visible light that would have the least energy is red. On the other hand, the color of visible light that would have the most energy is violet.

This is because red light has the longest wavelength and the lowest frequency out of all the colors in the visible spectrum. Violet light has the shortest wavelength and the highest frequency out of all the colors in the visible spectrum.

This relationship between wavelength, frequency, and energy can be explained by the relationship between electromagnetic waves and energy. All electromagnetic waves, including visible light, have a certain amount of energy that is proportional to their frequency. The higher the frequency, the more energy the wave has.

This relationship can also be seen in the electromagnetic spectrum, where higher energy waves (such as X-rays and gamma rays) have shorter wavelengths and higher frequencies, while lower energy waves (such as radio waves) have longer wavelengths and lower frequencies.

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The process of conduction takes place only in solids. It does not happen in liquids and gases. Heat is transferred through fluids by the process of convection. Infrared radiation transfers energy as a wave: it can travel through a vacuum.

It is the transfer of heat or electricity through a material without any physical movement of the material itself.

Conduction happens in solids, liquids, and gases, but solids are more effective at it.

The material's thermal conductivity affects how quickly heat transfers through it.

The gradient in temperature or the difference in electrical potential determines how much heat or electricity may go through a substance.

The transfer of heat or electricity through a material can be influenced by various factors, such as the type of material, its thickness, temperature, pressure, and electromagnetic fields.

Conductors are materials that allow heat or electricity to flow through them with ease, whereas insulators impede the flow of heat or electricity.

Conduction is a key factor in various industrial and technological applications, including heating and cooling systems, electrical power generation and distribution, and telecommunications.

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An increase in the entropy of a system can be described as an increase in the total amount of disorder in a system.

Entropy

Entropy is a measurable physical characteristic and a scientific notion that is frequently connected to a condition of disorder, unpredictability, or uncertainty. From classical thermodynamics, where it was originally recognized, through the microscopic description of nature in statistical physics, to the fundamentals of information theory, the phrase and concept are utilized in a variety of disciplines. It has numerous applications in physics and chemistry, biological systems and how they relate to life, cosmology, economics, sociology, weather science, and information systems, especially the exchange of information. 

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Answer:

in such condition the gravitational force will increase 16 times

Please find attached photograph for your answer.

Answer:

built in potential Vbi = +0.5V

barrier height = 0.139 V

doping concentration = 5.39 × 10²³cm³

Explanation:

The average acceleration for that time interval will be zero because the velocity is constant.

If an object's velocity changes, it is said to have been accelerated. An object's velocity can alter depending on whether it moves faster or slower or in a different direction. A falling apple, the moon orbiting the earth, and a car stopped at a stop sign are a few instances of acceleration. Through these illustrations, we can see that acceleration happens whenever a moving object changes its direction or speed, or both.

Velocity and speed describe how quickly or slowly an object is moving. We frequently encounter circumstances when we must determine which of two or more moving objects is going faster. If the two are travelling on the same route in the same direction, it is simple to determine which is quicker. It is challenging to identify who is moving the fastest when their motion is in the other direction. The concept of velocity is useful in these circumstances. Learn about the definition of velocity in this article as well as the distinction between speed and velocity.

the velocity is constant at -20 m/s. Hence the average acceleration for that time interval will be zero because the velocity is constant.

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Answer:

0

Explanation:

i did it on khan academy