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The time elapsed between the first splash and the second splash is approximately 0.69 seconds.

To calculate this, we consider the motion of two rocks thrown simultaneously from a bridge. Heather throws a rock straight down with a speed of 14 m/s, while Jerry throws a rock straight up with the same speed.

We use the equation for displacement in uniformly accelerated motion: s = ut + (1/2)at^2.

For Heather's rock, which is thrown downwards, the initial velocity (u) is positive and the acceleration (a) due to gravity is negative (-9.8 m/s^2). The displacement (s) is the height of the bridge (46 m).

Solving the equation, we find two possible values for the time (t): t ≈ -4.91 s and t ≈ 1.91 s.

Since time cannot be negative in this context, we discard the negative value and consider t ≈ 1.91 s as the time it takes for Heather's rock to hit the water.

For Jerry's rock, thrown upwards, we use the same equation with the same initial velocity and acceleration. The displacement is also the height of the bridge, but negative.

Solving the equation, we find t ≈ -5.68 s and t ≈ 1.22 s. Again, we discard the negative value and consider t ≈ 1.22 s as the time it takes for Jerry's rock to reach its maximum height before falling back down.

To find the time difference between the first and second splash, we subtract t ≈ 1.91 s (Heather's rock) from t ≈ 1.22 s (Jerry's rock). This gives us a time difference of approximately 0.69 seconds.

Therefore, the time elapsed between the first splash and the second splash is approximately 0.69 seconds.

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The forces acting on the wagon are the applied horizontal force, gravitational force and the friction. To maintain a constant speed after the mass is changed, the acceleration must be reduced to move in a constant speed.

Force is an external agent acting on a body to change its motion or to deform it. There are various kind of forces such as friction, gravitational force, magnetic force etc.

The net force on an object is dependent on the magnitude and direction of all the forces acting on it. Here, the gravitational force will balance the applied horizontal force if the weight is greater.

The forces acting on the wagon are  applied horizontal force, gravitational force and the friction.  According to Newton's second law of motion, the force is the product of mass and acceleration.

If the mass is increased, the force applied must be balanced to make the acceleration unchanged with a constant velocity.

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Mass is the measure of the amount of matter in an object and remains constant regardless of location, measured in units like kilograms or grams, while weight represents the gravitational force exerted on an object, varying with the strength of the gravitational field and measured in units like newtons or pounds.

Mass and weight are distinct concepts in physics, differing in their definitions, units of measurement, how they are measured, and what they depend on. Here's a breakdown of their differences:

Mass:

Definition: Mass refers to the amount of matter in an object. It is an intrinsic property and remains constant regardless of the object's location or gravitational environment.

Units of measurement: The standard unit of mass in the International System of Units (SI) is the kilogram (kg). Other common units include grams (g) and metric tonnes (t).

Measurement: Mass can be measured using various techniques, including balances and scales. These instruments compare the unknown mass to known masses and determine the equilibrium or balance point.

Dependence: Mass is independent of gravity and remains the same regardless of the gravitational force acting on the object.

Weight:

Definition: Weight is the force exerted on an object due to the gravitational pull of a celestial body (usually Earth). It represents the measure of the object's gravitational attraction towards that body.

Units of measurement: The standard unit of weight in the SI system is the newton (N). However, weight is commonly expressed in units of force, such as pounds (lb) or kiloponds (kp).

Measurement: Weight is typically measured using a spring scale or a device known as a weighing scale. These instruments rely on the deformation or stretching of a spring to determine the gravitational force acting on an object.

Dependence: Weight depends on the strength of the gravitational field where the object is located. The weight of an object will vary depending on the celestial body it is interacting with, as gravitational forces differ.

Therefore, mass refers to the amount of matter in an object and is measured in units like kilograms or grams. It remains constant regardless of location and is determined using balances or scales. Weight, on the other hand, represents the gravitational force exerted on an object and is measured in units like newtons or pounds. It varies based on the strength of the gravitational field and is measured using spring scales or weighing instruments.

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The distance between the two objects is reduced in half, that will be the changed force of attraction between them is option (E) 2.5 newtons.

According to Newton's law of universal gravitation, the force of attraction between two objects is inversely proportional to the square of the distance between them.

If the distance between Object A and Object B is reduced to half, the force of attraction will increase by a factor of 2² = 4. This means that the new force of attraction will be one-fourth of the original force.

Given that the original force of attraction is 5 newtons, the changed force of attraction between Object A and Object B, when the distance is reduced in half, will be 5 newtons / 4 = 1.25 newtons, which can be rounded to 2.5 newtons.The correct answer is option e.

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Torque is a measure of the turning force applied to an object about a rotational axis. It is calculated as the product of the force applied to the object and the distance from the axis of rotation at which the force is applied.

Use the equation slope = mod to calculate the unknown mass (mo) for parcels A and C, setting d = 1.0 m, and parcels G and H, setting d = 1.5 m.

Record all data, tables, and four graphs for analysis.

The experiment demonstrates the application of torque in determining unknown masses and provides valuable insights into the concept of torque in physics.

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Answer:

the needle must be 11.1 mm long to reach the bubble

Explanation:

 Given that;

An air bubble appears to be 7.2 mm below the flat surface of a piece of amber

so Apparent depth = 7.2 mm

index of refraction = 1.54

we know that;

Refractive index = Real depth / Apparent depth

we substitute

1.54 = Real depth / 7.2 mm

Real depth = 1.54 × 7.2 mm

Real depth = 11.088 ≈ 11.1 mm

Therefore, the needle must be 11.1 mm long to reach the bubble

Answer:

Explanation:

C. The energy on the macroscopic scale decreased, and the energy on the molecular scale increased.

A. friction converts some energy on the macroscopic scale to energy on the molecular scale.

B. The mechanical energy of the system decreased because of friction.

B. The mechanical energy of the system at the beginning of the experiment is equal to the mechanical energy of the system at the end of the experiment.

B. the mechanical energy of the system decreased due to the transfer of energy on a macroscopic scale to energy on a molecular scale.

The  ball rolling on the floor eventually comes to a stop which means that

the energy on the macroscopic scale decreased, and the energy on the

molecular scale increased.

This is a scale in which an object can be seen with the eyes. When

an object is in motion, the ball rolls away and becomes less visible hence a

decrease in the macroscopic scale.

During motion, friction converts some macroscopic energy into molecular

scale which is why there was an increase in it.

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Answer:

Four metals other than iron that can be made to exhibit magnetic properties are nickel, cobalt, manganese, and chromium.

two

neutral region

north

magnetic

Explanation:

PennFoster

The four metals other than iron that can be made to exhibit magnetic properties are:

Furthermore, the words which can be used to accurately complete the sentences below are:

The magnet has two unlike poles and in the neutral region, there is the South and North poles.

The North and South poles repel each other and a magnet can attract any material which contains iron materials.

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Answer:

\(0.059\ \text{m/s}\)

Explanation:

\(m_1\) = Mass of bullet = 4.2 g

\(u_1\) = Initial velocity of bullet = 0

\(m_2\) = Mass of hunter with rifle = 69.5 kg

\(u_2\) = Initial velocity of hunter with rifle

\(v_1\) = Final velocity of the bullet = 970 m/s

\(v_2\) = Final velocity of the hunter with the rifle

As the momentum of the system is conserved we have

\(m_1u_1+m_2u_2=m_1v_1+m_2v_2\\\Rightarrow v_2=\dfrac{m_1u_1+m_2u_2-m_1v_1}{m_2}\\\Rightarrow v_2=\dfrac{0-0-0.0042\times 970}{69.5}\\\Rightarrow v_2=-0.059\ \text{m/s}\)

The recoil speed of the hunter is \(0.059\ \text{m/s}\) in the opposite direction of the bullet.

The picture shown in the figure represents the Milky Way Galaxy. The Galaxy in which the entire solar system is present.

The million and trillion of stars in the universe form Galaxy. The galaxy in which the entire solar system is present is called Milky Way Galaxy. The Milky Way Galaxy is spiral in shape. This Galaxy has four major arms. The major arms have both old and young stars and the minor arms have the gas and star formation activity. This galaxy also has a black hole at its center. Galileo Galilei was the first to see the Galaxy.

The Milky Way Galaxy is made up of a dense cloud of gas that stretches across the sky as seen from the Earth. The age of the Milky Way Galaxy is 13.61 billion years ago and the Andromeda Galaxy is the nearest galaxy to the Milky Way Galaxy.

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Answer:

Explanation: To calculate the displacement of an object moving with constant acceleration, we can use the following kinematic equation:

d = (1/2)at^2 + v0t

where d is the displacement of the object, a is the constant acceleration, t is the time elapsed, and v0 is the initial velocity of the object.

In this case, we know the initial velocity v0 = 3 m/s and the final velocity vf = 10 m/s. We also know that the object moves with constant acceleration, so we can use the following equation to relate the initial and final velocities to the acceleration and displacement:

vf^2 = v0^2 + 2ad

Solving for d, we get:

d = (vf^2 - v0^2) / (2a)

Substituting the given values, we get:

d = (10^2 - 3^2) / (2a) = 91 / (2a)

Therefore, to calculate the displacement of the object, we need to determine the value of the acceleration.

We can use the velocity vs. time graph to find the acceleration of the object. The slope of the velocity vs. time graph represents the acceleration of the object, since acceleration is the rate of change of velocity with respect to time.

Since the initial position of the object is zero, the velocity vs. time graph will pass through the origin. Therefore, we can use the part of the graph between the initial time t=0 and the final time when the velocity is 10 m/s. This part of the graph will be a straight line with positive slope, representing the constant acceleration of the object.

We can calculate the slope of this line by finding the change in velocity and dividing by the time elapsed:

a = (vf - v0) / t

Substituting the given values, we get:

a = (10 - 3) / t

Therefore, the acceleration of the object is 7/t, where t is the time elapsed between the initial and final velocities.

Substituting this value for a into the expression for displacement, we get:

d = 91 / (2(7/t)) = (91t) / 14

Therefore, the part of the velocity vs. time graph between t=0 and the final time can be used to calculate the displacement of the object using the equation d = (91t) / 14.

The volume (in gallon) of water that have the same mass as the bar of gold is 0.153 gallon

We'll begin by obtaining the mass of the gold bar. This is given below:

Density = mass / volume

Cross multiply

Mass = Density × Volume

Mass of gold bar = 19300 × 0.00003

Mass of gold bar = 0.579 Kg

Finally, we shall determine the volume of water having the same mass as 0.579 Kg of the gold bar. Details below:

Volume = mass / density

Volume of water = 0.579 / 1000

Volume of water = 0.000579 m³

Multiply by 264.172 to express in gallon

Volume of water = 0.000579 × 264.172

Volume of water = 0.153 gallon

Thus, we can conclude that the volume of the water is 0.153 gallon

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Answer:analize a afirmacao a seguir e tudo que envolve o gerenciamento da marca e que ultrapassa as acoes com objetivos economicos e refere se a cultura principios e valores

Explanation:

The length of wire whose resistivity is 3 x 10^-6ohm, and radius is 0.2 mm, with a given value of 15.552 resistance is 6.5268 m.

Given data: r = 0.2 mm = 0.2 x 10^-3m Resistivity = 3 x 10^-6 ohm R = 15.552 ohm

Formula Used: Resistivity (ρ) = (RA)/L

Where, R is resistance, A is the area of cross-section, L is the length of the wire.

Resistance (R) = ρ (L/A)

Multiplying A on both sides, we get

Resistance (R) x A = ρ L ... equation (1)

Area of the cross-section of a wire of radius (r) is given by, A = πr^2

where, π is a constant whose value is 3.14

Substituting the given values, we get

A = πr^2= π (0.2 x 10^-3m)^2= 1.2566 x 10^-7 m^2

Substituting the values of R, A and ρ in equation (1), we get

Length of wire (L) = (Resistance x Area) / Resistivity= (15.552 ohm x 1.2566 x 10^-7 m^2) / (3 x 10^-6 ohm)= 6.5268 m

Therefore, the length of wire whose resistivity is 3 x 10^-6ohm, and radius is 0.2 mm, with a given value of 15.552 resistance is 6.5268 m.

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Answer:

No because you don't have to be black or white you don't have to be a pacific race to just get it like lets say for example a asian person come in and they want to get a abortion but the doctor say no then that person can end up killing her self or when the baby is born she could end you know doing something bad. But no you do not have to be a pacific person to just get it

Explanation:

She must be sure to  use an insulator like rubber and to rub the insulator on hair or fur to transfer charge when performing the demonstration. Hence, option (B) and (E) are correct.

When a subatomic particle is exposed to an electric and magnetic field, its electric charge causes it to feel a force.

Protons and electrons are the most prevalent charge carriers for the positive and negative forms of electric charges, respectively.

Hence, Marya must be sure to  use an insulator like rubber and to rub the insulator on hair or fur to transfer charge.

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To collect the asteroid an equal magnitude of the force in opposite direction is needed.

What is force ?

The motion or speed of an object depends upon the magnitude and the direction of the force.

If the direction of the force is against the direction of motion, then the object will slow down or stop. The two forces of the same magnitude in the opposite direction cancel each other and the collided objects stop each other.

Therefore, to collect the asteroid an equal magnitude of the force in opposite direction is needed.

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A 1 m-high table drops an object with a mass of 1 kg. This acceleration vector is identical at 50 cm and 80 cm distant the table if you depict the motion by sketching the object's velocities and accelerations vectors.

A vector quantity with direction is velocity. The velocity vector's direction is always parallel to the object's motion. Acceleration direction: The vector quantity of acceleration has a direction.

This acceleration vector, which represents the instantaneous acceleration, may be found by taking the velocity function's derivative with respect to time, as we saw in the previous chapter. The fact that they are essentially vector quantities is the only variation in either two or three dimensions.

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Galaxies were originally found to rotate at a rate that was too fast for said amounts of gravity that might be produced by the luminous mass. This led to the discovery of dark matter.

The force that pulls items toward the center of a planetary or other entity is called gravity. Each one of the planets are kept in orbits around the sun by gravity.

Albert Einstein discovered the solution in 1915 when he released his general relativity theories. All entities with mass, including our Earth, really bend and curve spacetime, which is what causes gravity to pull you toward the ground.

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In a DC generator, the generated electromotive force (emf) is directly proportional to the rotational speed of the generator's armature and the strength of the magnetic field within the generator.

This relationship is described by the equation for the generated emf in a DC generator:

Emf = Φ * N * A * Z / 60

Where:

Emf is the generated electromotive force (in volts),

Φ is the magnetic flux density (in Weber/meter^2\(meter^2\) or Tesla),

N is the number of turns in the armature winding,

A is the effective area of the armature coil (in square meters),

Z is the total number of armature conductors, and

60 is a constant representing the conversion from seconds to minutes.

From this equation, we can see that the generated emf is directly proportional to the magnetic flux density (Φ) and the product of the number of turns (N), effective area (A), and the total number of armature conductors (Z). This means that increasing any of these factors will result in a higher generated emf.

The magnetic flux density (Φ) can be increased by using stronger permanent magnets or increasing the strength of the field windings in the generator.

The number of turns (N) and the effective area (A) are design parameters and can be optimized for a specific generator. Increasing the number of turns or the effective area will result in a higher generated emf.

Similarly, the total number of armature conductors (Z) can be increased to enhance the generated emf.

By controlling and optimizing these factors, the generated emf in a DC generator can be increased, resulting in higher electrical output. However, it is important to note that there are practical limits to these factors based on the design and construction of the generator.

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Answer:

PE = (|accepted value – experimental value| \ accepted value) x 100%

Explanation:

Answer: X-rays

Explanation: Lead is used for shielding in x-ray machines. Lead is very thick and blocks x-rays.

Answer:

x-rays

Explanation:

lead is a metal so we all know that heat goes through metal, so that is no on the microwaves and infrared rays, and gamma has such a high frequency that it moves straight through any material that isn't tempered with

Answer:

2

Explanation:

İf system ideal ( no frictional force )

Fnet=m.a

20=10.a

a=2m/s2

The acceleration of the wagon pulled by the girl is 2m/s².

Given the data in the question;

Acceleration of wagon; \(a =\ ?\)

To determine the acceleration of the wagon, we use the expression from the Newton's Second law of motion:

\(F = m * a\)

Where m is mass and a is acceleration

We substitute our given values into the equation and solve for "a"

\(20N = 10kg * a\\\\20kg.m/s^2 = 10kg * a\\\\a = \frac{20kg.m/s^2}{10kg}\\\\a = 2m/s^2\)

Therefore, the acceleration of the wagon pulled by the girl is 2m/s².

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When two magnets are close to each other, the magnets experience a repulsive or attractive force. The magnetic field strength is affected by the orientation of the magnet.

The direction in which the bar magnet obtains its maximum magnetic property is called the orientation of the magnet. The magnetic field strength depends on the orientation of the magnet.

The magnetic field lines emerge from the north pole and end in the south pole. When the two bar magnets of opposite poles face each other, an attractive force will be produced and magnetic field strength increases.

When the bar magnet of the same poles faces each other, repulsive force will produce and magnetic field strength decreases. Hence from the orientation of the bar magnet,  the magnetic field strength gets affected.

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Answer:

22m/s

Explanation:

This is a vector addition problem. First identify the two vectors: 20m/s in the -x direction and 9m/s in the -y direction. Since neither vector shares an axis component you can use the formula \(\sqrt{20^2+9^2\\\) =21.93 (This is the Pythagorean Theorem where your non-hypotenuse sides are your velocity vectors). Round to 2 significant figures and you'll get 22m/s.

Answer:

To convert nanometers (nm) to picometers (pm), you need to multiply the value by 1,000. Therefore, to convert 12 nanometers to picometers, you would perform the following calculation:

12 nm * 1,000 pm/nm = 12,000 pm

So, 12 nanometers is equal to 12,000 picometers.

The object's speed shortly before it lands on the earth is 40 m/s.

The speed at which something moves in a specific direction is known as its velocity. as the speed of a car driving north on a highway or the pace at which a rocket takes off. Because the velocity vector is scalar, its absolute value magnitude will always equal the motion's speed.

The parameters are as follows: the pebble's time, t = 4 s; the object's velocity right before impact;

The kinematic equation is as follows;

v = in which

v = 0+10 (4)

The object's speed right before impact with the earth is v = 40 m/s2, where g is the acceleration caused by gravity and an is a constant of 10 m/s2. As a result,

the object's final velocity before impact is 40 m/s.

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Answer:

Step 1: We make the assumption that 125 is 100% since it is our output value.

Step 2: We next represent the value we seek with $x$.

Step 3: From step 1, it follows that $100\%=125$.

Step 4: In the same vein, $x\%=125$.

Step 5: This gives us a pair of simple equations:

$100\%=125(1)$.

Explanation:

I apologize, but I can't help with the specific calculations you've provided. Calculating forces and friction coefficients requires specific numerical values and equations. However, I can explain the concepts and provide a general understanding of the questions you've asked.

3.1 To calculate the magnitude of the force exerted by the athlete vertically on the track, you need the vertical component of the force applied. If the angle of 50° is measured from the horizontal, you can calculate the vertical component using the equation: horizontal force = force × sin(angle).

3.2 To calculate the magnitude of the force exerted by the athlete horizontally on the track, you need the horizontal component of the force applied. Using the same angle of 50° measured from the horizontal, you can calculate the horizontal component using the equation: vertical force = force × cos(angle).

3.4 To determine the minimum value of the static friction coefficient, you would need additional information such as the mass of the athlete. In addition, you would need the normal track force. The coefficient of static friction is a dimensionless value that represents the maximum frictional force that can exist between two surfaces without causing them to slip. The formula to calculate static frictional force is static frictional force = coefficient of static friction × normal force.

3.5 To determine the resultant force exerted on an object when three forces are applied, you need to calculate the vector sum of the forces. You can add forces vectorially by breaking them down into their horizontal and vertical components. You can also sum up the components separately, and then combine them to find the resultant force.

Please provide more specific numerical values or equations if you would like assistance with the calculations.