when approaching an older lcd panel from the side, you do not realize there is actually an image displayed on it until you are almost in front of it. which two options might explain why you could not detect the image from the side?

See the attached diagram for reference and free body diagrams. The acceleration a of each body will be the same since each connecting string is in tension.

By Newton's second law, we have

• net force on the train:

- - horizontal

\(\sum F = F - F_{k,T} - T_1 = m_Ta\)

(where F = 12 N)

- - vertical

\(\sum F = N_T - m_Tg = 0\)

• net force on wagon 1:

- - horizontal

\(\sum F = T_1 - T_2 - F_{k,1} = m_1a\)

- - vertical

\(\sum F = N_1 - m_1g = 0\)

• net force on wagon 2:

- - horizontal

\(\sum F = T_2 - F_{k,2} = m_2a\)

- - vertical

\(\sum F = N_2 - m_2g = 0\)

We want to determine T₂, the tension in the string connecting the two wagons.

For each body, the corresponding normal force has magnitude

N = mg

where m is the respective mass, and the kinetic friction has magnitude

Friction = 0.05 N = 0.05mg

So if µ = 0.05, then the frictional force on each body is

\(F_{k,T} = 0.05 (2.7\,\mathrm{ kg}) g = 1.323\,\mathrm N\)

\(F_{k,1} = 0.05 (1.8\,\mathrm{ kg}) g = 0.882\,\mathrm N\)

\(F_{k,2} = 0.05 (1.0\,\mathrm{ kg}) g = 0.49\,\mathrm N\)

which leaves us with the system of equations,

[1] … 12 N - 1.323 N - T₁ = (2.7 kg) a

[2] … T₁ - T₂ - 0.882 N = (1.8 kg) a

[3] … T₂ - 0.49 N = (1.0 kg) a

Adding [1] and [2] eliminates T₁ :

(12 N - 1.323 N - T₁) + (T₁ - T₂ - 0.882 N) = (2.7 kg) a + (1.8 kg) a

[4] … 9.795 N - T₂ = (4.5 kg) a

Divide through both sides of [3] by 1.0 kg to solve for a :

a = (T₂ - 0.49 N) / (1.0 kg)

Substitute this into [4] and solve for T₂ :

9.795 N - T₂ = (4.5 kg) (T₂ - 0.49 N) / (1.0 kg)

(9.795 N - T₂) (1.0 kg) = (4.5 kg) (T₂ - 0.49 N)

9.795 N - T₂ = 4.5 T₂ - 2.205 N

12 N = 5.5 T₂

T₂ = (12 N) / 5.5 ≈ 2.1818 N ≈ 2.2 N

Option 4.9 N is correct.

The weight (w) of the water displaced by the aluminum test object is 4.9 N.

How to calculate the weight of water displaced by an object? The weight of water displaced by an object can be calculated using Archimedes’ principle, which states that the weight of a liquid displaced by an object is equal to the buoyant force acting on the object. When an object is placed in a liquid, it experiences a buoyant force that is equal to the weight of the liquid displaced by the object.

Buoyant force = weight of displaced liquid Using the given options, we can calculate the weight of water displaced by the aluminum test object and match it with the answer. The mass of the aluminum object is 0.5 kg and its volume is 0.0001 m3. We know that the density of water is 1000 kg/m3 and the acceleration due to gravity is 9.8 m/s2.

Therefore, the weight of water displaced by the aluminum test object is given by: w = mg = ρVg = 1000 x 0.0001 x 9.8 = 0.98 N = 4.9 N (divided by 2 since only half the object is submerged)Therefore, the weight (w) of the water displaced by the aluminum test object is 4.9 N.

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Answer:

I need to talk to somone about my confusing love life

Explanation:

In order  to make the electromagnet lift more paperclips, the group can add more wraps of wire around the nail; option D

Electromagnets are materials that work on the principle of electromagnetism.

Electromagnets possess both electric and magnetic properties and are produced as a result of the interaction of the electrical and magnetic fields.

The strength of electromagnets area affected by the following:

The rate of change of flux changeinresilience the field - the strength of electromagnets increases with electromagnetsincreasethe change in the rate of change of flux

the number of turns of the coil - the greater the turn of the ring, the stronger the electromagnetic field produced.

the material of the core - when the material of the core is made of good conductors, the strength of the electromagnetic field produced increases.

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Answer:

This level of needs is known as safety needs. Safety needs are the need for security, stability, and protection from physical and emotional harm. These needs include physical safety, financial security, health and well-being, and protection from discrimination and harassment.

Explanation:

Answer: 1) Mass is a scalar quantity while weight is a vector quantity

2) Mass is measured in Gramma and kilogram while weight is measured in Newton.

Explanation:

Mass can be defined as the amount of matter that comprises an object. It is a scalar quantity, that is, it has magnitude. It is measured in kilogram with its unit in Kg. Mass is measured using an ordinary weighing scale.

Weight can be defined as the force acted upon an object due to gravity. Weight is a vector quantity, that is, it has both magnitude and direction towards the center of the earth. Weight can be measured with the use of a spring balance. Its unit is in Newton.

By Newton's second law, the net force on the car is

∑ F = m a

where m is the mass of the car and a is magnitude of the acceleration.

The car is slowing down, so the net force opposes the direction in which the car is moving. Vertically, the car is in equilibrium, the net force is entirely due to friction. Taking the direction opposite the car's motion to be negative, we have

- 200 N = (200 kg) (-a)

a = (200 kg) / (200 N)

a = 1 m/s²

If you're also supposed to find the coefficient of kinetic friction, use the fact that the car the vertical forces cancel out, namely

n + (-w) = 0

where n is the magnitude of the normal force and w is the car's weight. The friction force f is proportional to the normal force n by a factor of µ, the coefficient of kinetic friction, such that f = µ n. Then

f / µ = w

(200 N) / µ = (200 kg) (9.80 m/s²)

µ = (200 N) / ((200 kg) (9.80 m/s²))

µ ≈ 0.102

Pressure above the left beaker the pressure outcome of the current experimental circumstances.

Either the action of pressing or the state of pressing. A strain or force exerted against resistance in any direction. Force per unit of area is a measure of force exerted uniformly over a surface.

Pressure is the ratio of the force applied perpendicularly to an object's surface to its area. Its abbreviation is "p" or "P."

The force applied by one region of a gas, liquid, or solid to another, expressed as a function of area. A substance is said to have negative pressure if another substance exerts greater force per unit area on it than it does on it. Pressure is commonly measured in Pascal units, atmospheres, or pounds per square inch. Its value is just the opposite of the pressure the other substance is exerting.

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It takes the boulder approximately 10.4 seconds to strike the ground.

To solve for the time it takes for the boulder to strike the ground, we can use the kinematic equation:
d = vi*t + (1/2)at^2
where d is the distance traveled (which is equal to the height of the cliff, 120m), vi is the initial velocity (which is 0 m/s since the boulder was dropped from rest), a is the acceleration due to gravity (which is the surface gravitational field of the planet, 3.6 N/kg), and t is the time it takes for the boulder to fall.
Rearranging the equation to solve for t, we get:
t = sqrt((2*d)/a)
Plugging in the values we have, we get:
t = sqrt((2*120)/3.6) = 10.4 s

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Turbine, rotational energy, and electric generators are the correct answer for the blanks from the given options.

An electric motor is a mechanism that turns electricity into mechanical energy.

The interaction between the motor's magnetic field and electric current in a wire winding generates force in the form of torque imparted to the motor's shaft in most electric motors.

An electric generator is physically equivalent to an electric motor, but it converts mechanical energy into electrical energy using a reversed flow of power.

The sentences describe how power generation works as;

All turbines work on the same basic principle of converting kinetic energy, generated through the combustion of fuels or from the movement of wind or water, into rotational energy. This energy is then used to drive an electric generator to produce electricity.

Hence, Turbine, rotational energy, and electric generators are the correct answer for the blanks.

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To lift this weight, you would need a force greater than or equal to 3,920 N (assuming you are lifting it vertically).

weight = \(1 m^3 \times 400 kg/m^3 \times9.8 m/s^2\)

weight = 3,920 N

Force is a physical quantity that describes the interaction between objects or systems. The SI unit of force is the Newton (N), which is defined as the amount of force required to accelerate a one kilogram mass at a rate of one meter per second squared.

Force is also responsible for deformations in solid objects, such as stretching or compressing a spring. Nuclear forces are responsible for the interactions between subatomic particles, and frictional forces are the forces that resist motion when two surfaces come into contact. Gravitational force is the force that pulls objects towards each other due to their masses. Electromagnetic force is responsible for the interactions between charged particles, such as in electricity or magnetism.

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The bones are 6751 years old.

We know that time of a reaction is given by:

                                              kt = ln(A'/A)

where,

k = reaction constant = 0.0001216

A' = initial concentration

A = final concentration = 44% A = 0.44A

Putting these values in above equation we get:

t = ln(1/0.44)/ 0.0001216

 = 6751 years

So, the bones are 6751 years old.

All radioactive reactions are first order reaction.

A first-order reaction is one in which the rate of reaction is proportional to the concentration of the reactant. To put it another way, doubling the concentration doubles the reaction rate. A first-order reaction can have one or two reactants, as in the case of the decomposition reaction.

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Answer:

Height, speed, mass

Explanation:

Answer:

D height, speed, mass

Explanation:

I took this test early november

Answer:

The final angular speed is 16.1 rad/s

Explanation:

Given;

initial moment of inertia, I₁ = 2.56 kg.m²

final moment of inertia, I₂ = 0.40 kg.m²

initial angular speed, ω₁ = 0.4 rev/s = 2.514 rad/s

Apply the principle of conservation of angular momentum;

I₁ω₁ = I₂ω₂

where;

ω₂ is the final angular speed

ω₂ = (I₁ω₁) / (I₂)

ω₂ = (2.56 x 2.514) / (0.4)

ω₂ = 16.1 rad/s

Therefore, the final angular speed is 16.1 rad/s

Acid-base reactions can also be classified as  double replacement reaction.

An acid base reaction is said to have occurred when the replaceable hydrogen ions in an acid have all been replaced by metallic or ammonium ions. This is the basic definition of acid base reaction.

Consider the reaction;

NaOH(aq) + HCl(aq) ------> NaCl(aq) + H2O(l)

We can see that we can also classify this reaction as a double replacement reaction since each of the anions in the reactant side exchanged cation partners in the product.

The reaction fits the general description; AB + CD ----> AD + CB

Thus, acid-base reactions can also be classified as double replacement reaction.

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Answer:

7. Double Replacement

DOES ANYONE HAVE THE ANSWERS TO THIS TEST??!! IM PANICKING! IT THE CHEMICAL REACTIONS UNIT TEST FOR PHYSICAL SCIENCE NOT CHEMISTRY!! It has 18 questions. Someone help me. ✌

Answer:

The horizontal component of the force, \(F_x= 34.24 \ N\)

The  vertical component of the force, \(F_y=7.28 \ N\)

Explanation:

Given;

Force on the rope, F = 35 N

angle between the rope and the horizontal = 12 °

The horizontal component of the force is given by;

\(F_x = Fcos \theta\\\\F_x = 35cos(12^0)\\\\F_x = 34.24 \ N\)

The vertical component of the force is given by;

\(F_y = Fsin\theta\\\\F_y = 35sin(12^0)\\\\F_y = 7.28 \ N\)

You wish to start a fire by reflecting sunlight from a mirror onto some paper under a pile of wood which means the best choice of the type of mirror for this operation is a concave one and is denoted as option B.

This type of mirror usually has a reflective surface that is curved inward and away from the light source. They also reflect light inward to one focal point which is done by reflecting all the rays parallel to its axis and converge them at a single point.

For fire to occur, then we need a large concentration of light rays which will help reflect all the sunlight from a mirror onto some paper under a pile of wood thereby causing the fire.

This is therefore the reason why concave mirror was chosen as the most appropriate choice.

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Answer:

Your a genius!

Explanation:

The distance should be 0.12m

Since A cat is chasing a rat and moving at 0.8m per 2 seconds.

And, the time taken should be 3 seconds

So, here the distance should be

= 0.8/2 * 3

= 0.4*3

= 0.12m

Hence, we can conclude that The distance should be 0.12m

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gas is the answer for this question

can you make me a brainlist

The mass (in grams) Ricardo should measure out on the scale, given that he has 2500 mg is 2.5 g (Option B)

To obtain the mass that Ricardo should measure out on the scale, we shall convert 2500 milligrams (mg) to grams (g). This is illustrated below:

Conversion scale

1000 mg = 1 g

Therefore

2500 mg = (2500 mg × 1 g) / 1000 mg

2500 mg = 2.5 g

From the above, we can see that 2500 mg is equivalent to 2.5 g

Thus, we can conclude from the above illustration that the mass Ricardo should measure out on the scale is 2.5 g (Option B)

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Orbital velocity of satellite

\(v = \sqrt{ \frac{gm}{r} } \)

Radius of new orbit r' =6r

Thus new orbital velocity of satellite:

\(v = \sqrt{ \frac{gm}{6r} } = \frac{v}{ \sqrt{6} } \)

For satellites in circular orbits, the relationship between orbital velocity and altitude is strict. The task of a satellite launch rocket is to release the satellite at a suitable place in space, with the appropriate speed and direction of movement to put it in the desired orbit.

How a satellite stays in orbit can be thought of in two equivalent ways, both of which explain the relationship between the satellite's altitude and velocity.

The motion of the satellite can be seen as creating a centrifugal force that opposes the gravitational pull. For example, imagine attaching an object to a string and swinging it in a circle. The object is pulling outward against the string, and that outward force (centrifugal force) becomes greater the faster the object swings. At the right speed, the centrifugal force of the satellite due to motion around the earth just balances the gravitational pull, and the satellite remains in orbit.

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Light photons always travel at a constant speed (the speed of light) regardless of their energy, while the velocity of electrons is not constant and can vary with their energy.

Light photons and energetic electrons do not have constant velocities independent of energy. Light photons, which are particles of electromagnetic radiation, travel at a constant speed in a vacuum, which is approximately 299,792 kilometers per second (or about 186,282 miles per second) in a vacuum, denoted as the speed of light (c). This speed is a fundamental constant of nature and remains constant regardless of the energy of the photons. In other words, all photons, regardless of their energy, travel at the same speed in a vacuum.

On the other hand, energetic electrons do not have a constant velocity independent of their energy. According to classical physics, the velocity of an electron can vary depending on its energy. In classical mechanics, the kinetic energy of an object is related to its velocity. However, in the microscopic world of quantum mechanics, the behavior of particles such as electrons is described differently.

In quantum mechanics, the concept of particle velocity becomes less straightforward. Instead of velocity, quantum particles are described by wavefunctions, which represent the probability distribution of finding the particle at a certain location. The wavefunction of an electron evolves over time according to the Schrödinger equation, and it does not directly correspond to a well-defined classical velocity.

However, in certain situations, such as in electron beams or particle accelerators, electrons can be accelerated to high energies. In these cases, the energy of the electrons is related to their speed, but it is not a constant relationship. As the energy of the electrons increases, their speed can also increase, but it is not independent of their energy.

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Answer:

Gravity

Explanation:

The answer is gravity because when the 3 masses were hung from the spring, gravity pulled the spring towards the ground.

I = Δp

I = m(v₂-v₁)

I = 20(3-1)

I = 40 kg m/s

The definitive treatment for appendicitis is usually surgical removal of the appendix, a procedure known as an appendectomy

The patient in question, a 12-year-old male, presented with nausea and vomiting accompanied by right lower abdominal pain. Acute appendicitis is a potential diagnosis that could explain the symptoms.

A brief overview of what PESILAD is PESILAD is an acronym that stands for Pain, Etiology, Signs, Impact, Learning, Anatomy, and Differential Diagnosis. PESILAD is a systematic method of assessing clinical cases that are widely used in medical education to teach students how to think like a doctor when diagnosing and treating patients.

What is acute appendicitis? Appendicitis is a condition in which the appendix, a small, thin tube that extends from the large intestine, becomes inflamed. It is a common condition that affects people of all ages, but it is more common in people between the ages of 10 and 30. Appendicitis can cause severe pain in the lower right abdomen, nausea, vomiting, fever, and other symptoms. The pain may start near the navel and move to the lower right side of the abdomen over time. Appendicitis is a medical emergency that requires prompt medical attention. If left untreated, the appendix can burst, leading to serious complications.

What is the diagnosis of Acute Appendicitis? The diagnosis of appendicitis is usually made based on a combination of a patient's symptoms, physical exam, and lab tests. In most cases, the doctor will perform a physical exam, check the patient's vital signs, and take a medical history to determine the cause of the symptoms. Blood tests and imaging studies, such as an ultrasound or CT scan, may also be ordered to help confirm the diagnosis.

The definitive treatment for appendicitis is usually surgical removal of the appendix, a procedure known as an appendectomy. In some cases, antibiotics may be used to treat the infection before surgery is performed.

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A blood test to look for infections, a urine test to rule out other causes, and imaging tests like an ultrasound or CT scan to see the appendix and look for inflammation are some of the procedures that may be performed.

Inflammation of the appendix, a tiny pouch situated in the lower right side of the belly, is a common symptom of acute appendicitis. Abdominal pain is the most common symptom, frequently beginning at the belly button and moving to the lower right abdomen.

A 12-year-old male who complains of right lower abdomen discomfort and nausea and vomiting may have acute appendicitis, according to a probable diagnosis. Other signs that could be present include fever, appetite loss, and right lower abdominal pain.

A healthcare provider often does a physical examination, examines the patient's medical history, and orders further testing to identify acute appendicitis. A blood test to look for infections, a urine test to rule out other causes, and imaging tests like an ultrasound or CT scan to see the appendix and look for inflammation are some of the procedures that may be performed.

The best course of action would be to consult with a healthcare professional, such as a surgeon, who can further evaluate the patient and determine the most appropriate treatment, which typically involves surgical removal of the inflamed appendix (appendectomy), if the clinical findings and diagnostic tests support the diagnosis of acute appendicitis.

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Tardigrades related to astronomy as they can survive in extreme, harsh environments, including space for long time without oxygen.  The correct option is A , B and C.

A special adaptation that allows the tiny animal known as the tardigrade to curl up into a dry, lifeless ball and survive for decades.

Tardigrades can undergo utter vacuum and intense pressures more than five times as in the deepest ocean. Temperatures up to 300F and as low as -458F is maintained.

They survive in space and for long time for about 10 days. They can live without water for decades.

Thus, the correct option is A , B and C.

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Answer:

20 m/s

Explanation:

initial velocity, u= 25m/s

u has two components. one in horizontal and in one vertical.

so,

u sin theta = vertical component.

=> u sin theta = 25× 4/5

= 20 m/s

Answer:

Okay, here are the steps to solve this problem:

   The mass of the copper sample is 525 g

   The specific heat of copper is 0.385 J/kg-K

   The initial temperature is 20°C

   The final temperature is 100°C

   To convert from °C to K: T(K) = T(°C) + 273

   So:

   Initial T (K) = 20°C + 273 = 293 K

   Final T (K) = 100°C + 273 = 373 K

   Temperature change = 373 - 293 = 80 K

Heat Required = (Mass * Specific Heat * Temperature Change)

= (525 g * 0.385 J/kg-K * 80 K)

= 16000 J

So the answer is B: 16000 J

Explanation: