A student tosses a ball horizontally from a balcony to a friend 3.8 meters down below them. How long does the ball take to reach their friend?

Answer:

I best answer is true sorry if it's wrong

Answer:

True

Explanation:

Induced current /voltage is proportional to the rate of change over time of the magnetic field. so a change in the direction of the current will also change the direction of the magnetic field

Answer:

a. to find the volume of a shape using V=I Xw X h. Pull out your LEGO bricks and begin with a 1 by 1.

b.Direct measurement is measurement done by bringing the target into contact with the measurement system to read the length, height, or other aspect directly. Although direct measurement allows measurement results to be known as they are, errors may occur depending on the skill of the person doing the measurement.

c.1. Switch off the fan in the lab so that wind will not affect the result. 2. Ensure that the ruler has stopped moving before taking length measurement.

Answer:

I believe A would be the best answer

Explanation:

Cell transport means things entering and leaving the cell, this would be controlled by the cell membrane

Waste excretion is controlled by the vacuole

Energy production is the mitochondria (the mitochondria is the power house of the cell)

Life functions include cellular reproduction and the nucleus contains the genetic information to do this

Answer:

a

Explanation:

The sun only appear to pass through the constellations of the zodiac because Over the course of a year, the sun appears to be in front of, or “in”, different constellations due to its orbit .

A group of stars that can be identified with the shape of an identifiable object like an animal or a known object is called a constellation. Major constellations are the Ursa Major, Ursa Minor and Cassiopeia.

Its motion is entirely an illusion, caused by Earth's own motion around our star. Over the course of a year, the sun appears to be in front of, or “in”, different constellations. One month, the sun appears in Gemini; the next month, in Cancer.

If we wanted to (and were endowed with supernatural powers), we could alter Earth's orbit so that the Sun appears to move through other constellations. Neither Lupus nor Lyra can be zodiac constellations, however, because the Sun doesn't "move through them."

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you have to draw diagram

\(\mathfrak{\huge{\pink{\underline{\underline{AnSwEr:-}}}}}\)

Actually Welcome to the Concept of the Current Electricity .

Since we know that, Current is Charge per unit time.

so we get as,

Q = I*t

here, Q = charge, I = current, t = time.

Rx and Ry represent the x- and y-components of the force of the current, respectively.

The magnitude of the force of the current, or the strength of the current, is represented by |r|. In terms of the forces moving the boat, the x- and y-components of the force of the current represent the horizontal and vertical forces that the current exerts on the boat.

|r| represents the magnitude of this force, which can be thought of as the intensity of the current. The stronger the current, the greater the force it will exert on the boat and the greater impact it will have on its movement.

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Answer:

1800 times 2= 3600

Explanation:

The resultant of these two vectors is 19 units of two vectors, one with a magnitude of 14 units and one with a magnitude of 5 units, are both pointing east.

Explanation

As we know R = A + B

where is R resultant A and B are vectors is possible only if the both the vectors are in the same direction.

Therefore, R = 14 + 5

                     19 units

A resultant force is the single force and corresponding torque that are created when a system of forces and torques acting on a rigid body is added together using vectors in physics and engineering. A consequent force, also known as a resultant force-torque, is one that acts on a rigid body in the same way as the initial system of forces.

Through computational analysis or (in the case of sufficiently simple systems) a free body diagram, the resultant force on a body is calculated and visualized.

The resultant force's location of application defines the torque it produces. Some people use the term resultant force-torque to describe the forces and torques acting on a rigid body; the word resultant force should be understood to include both.

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The required current in the windings of the solenoid is approximately 0.457 A. This can be calculated using the formula for the magnetic field inside a solenoid, which is given by B = μ₀ * n * I, where B is the magnetic field, μ₀ is the permeability of free space, n is the number of turns per unit length, and I is the current. Rearranging the formula, we can solve for I: I = B / (μ₀ * n).

Plugging in the given values (B = 1.00 x 10⁻⁴ T, n = 1090 / 0.420 m), along with the value for μ₀, we find that I ≈ 0.457 A.

The magnetic field inside a solenoid depends on the current flowing through the windings and the number of turns per unit length. By rearranging the formula for the magnetic field inside a solenoid and substituting the given values, we can solve for the required current. In this case, the solenoid has 1,090 turns uniformly distributed over a length of 0.420 m, producing a magnetic field of 1.00 x 10⁻⁴ T at its center. By plugging in the values for the magnetic field and the number of turns per unit length into the formula, along with the value for the permeability of free space, we find that a current of approximately 0.457 A is required.

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Answer:

1 million.

Explanation:

Answer: 100 Billion

Explanation: Scientists believe around  100 Billion Galaxies that exist across the observable universe

Answer:

transmission: the passing of a wave through an object

Explanation:

Answer::27 km per hour West + 17 km per hour North

Explanation:

:27 km per hour West + 17 km per hour North

he or she is right good jod

The velocity for the trip would be 31 km per hour, therefore the correct answer is option B.

An object's position changes if it moves in relation to a reference frame, such as when a passenger moves to the back of an airplane or a professor moves to the right in relation to a whiteboard. Displacement describes this shift in location.

As given in the problem, on a trip you travel at a constant speed of 50 kilometers per hour North for 1 hour. Then you turn West and travel at a constant speed of 40 kilometers per hour for 2 hours.

The final displacement of the trip = √(50² + 80²)

                                                         = 94.34 kilometers

The velocity of the trip = total displacement of the trip / time period

                                      =94.34 kilometers / 3

                                      = 31 kilometers per hour

Thus, the velocity of the trip would be 31 kilometers per hour.

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Answer:

Dispersion

Explanation:

dispersion

[diˈspərZHən, diˈspərSHən]

NOUN

the action or process of distributing things or people over a wide area.

"some seeds rely on birds for dispersion"

the state of being dispersed over a wide area.

"the general dispersion of Hellenistic culture"

ecology

the pattern of distribution of individuals within a habitat.

(Dispersion)

another term for diaspora.

a mixture of one substance dispersed in another medium.

physics

the separation of white light into colors, or the separation of any radiation according to wavelength.

statistics

the extent to which values of a variable differ from a fixed value such as the mean.

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Answer:

2. Repulsion

Explanation:

number two is the answer

Answer:

Repulsion is the surest test which confirms that the given piece of the object is a magnet.

........

Answer:

it is absorbed or reflected by the atmosphere

Explanation:

In the case when approx 50% only of the solar energy would be directed towards earth and it would be penetrates directly to the surface so the rest or remaining of the radiation would be either absorbed or refected by the atmosphere

So as per the given situation the above represent the answer

hence, the same is to be considered and relevant

The total energy developed by the system in 5 minutes is 18,000 joules (J).

To calculate the total energy developed by the system in 5 minutes, we can use the formula:

Energy = Power × Time

The power can be calculated using the formula:

Power = Voltage × Current

Given that the voltage is 12 V and the current is 5 A, we can substitute these values into the formula:

Power = 12 V × 5 A

Power = 60 W

Now, we can calculate the total energy by multiplying the power by the time, which is 5 minutes:

Energy = 60 W × 5 minutes

To ensure consistency in units, we need to convert minutes to seconds since power is typically expressed in watts and time in seconds.

There are 60 seconds in a minute, so we multiply the time by 60:

Energy = 60 W × 5 minutes × 60 seconds/minute

Energy = 60 W × 300 seconds

Energy = 18,000 J

Therefore, the total energy developed by the system in 5 minutes is 18,000 joules (J).

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The probable question may be:

Calculate the total energy developed by the system in 5 minutes, given the following information voltage = 12 V and current = 5 A.

In summary, the observations about determining ages of rocks and fossils are based on scientific principles such as radioactive decay, superposition, and original horizontality.

A scientific principle is a fundamental concept or law that explains how the natural world works. It is a statement based on empirical evidence and repeated observations that is widely accepted by the scientific community as a fundamental truth. Scientific principles provide a framework for understanding and explaining natural phenomena, and they form the basis for scientific research and discovery.

Examples of scientific principles include:

The law of conservation of energy, which states that energy cannot be created or destroyed, only transformed from one form to another.

The theory of evolution, which explains how species change over time through natural selection and genetic variation.

The law of gravity, which explains the attraction between objects with mass and their impact on space-time.

The principle of relativity, which explains how the laws of physics are the same for all observers in uniform motion relative to each other.

Scientific principles are subject to change and refinement as new evidence and discoveries are made, but they provide a reliable foundation for scientific inquiry and understanding.

Here,

1. Observations about determining ages of rocks and fossils:

Scientists use a variety of methods to determine the ages of rocks and fossils, such as radiometric dating, relative dating, and stratigraphy.

Radiometric dating involves measuring the decay of radioactive isotopes in rocks or fossils, which provides an estimate of the time elapsed since the material was last heated or exposed to sunlight.

Relative dating involves comparing the ages of rocks or fossils based on their position in relation to one another.

Stratigraphy involves studying the layers of rock or sedimentary deposits to determine the relative ages of the materials.

2. Explanation based on scientific principles:

Radiometric dating is based on the principle of radioactive decay, which is the spontaneous breakdown of atomic nuclei into smaller particles over time. The rate of decay is constant, which allows scientists to use the amount of remaining radioactive material to estimate the time elapsed since the material was last heated or exposed to sunlight.

Relative dating is based on the principle of superposition, which states that the oldest rocks or fossils are found at the bottom of a sequence, while the youngest rocks or fossils are found at the top. By comparing the ages of rocks or fossils in different layers, scientists can determine their relative ages.

Stratigraphy is based on the principle of original horizontality, which states that sedimentary layers are deposited in horizontal layers. By studying the layers of rock or sedimentary deposits, scientists can determine the relative ages of the materials based on their position.

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The point of maximal impulse (PMI) is normally located on the chest wall where the heartbeat is most prominently felt. It corresponds to the area on the chest where the left ventricle of the heart is in contact with the chest wall during systole (contraction phase of the heart). The PMI is typically found in the fifth intercostal space, just medial to the midclavicular line. In other words, it is often felt or observed slightly below the left nipple.

However, it's important to note that the location of the PMI can vary depending on factors such as the individual's body habitus, heart size, and certain cardiac conditions. In some cases, the PMI may be displaced due to factors such as enlargement of the heart or underlying heart conditions. Therefore, it's always best to consult a healthcare professional for accurate assessment and interpretation of the PMI.

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Answer:

1. W = 900 J

2. a = -450000 m/s²

Explanation:

2.

First, we calculate the deceleration of the bullet by using 3rd equation of motion:

\(2as = V_{f}^{2} - V_{i}^{2}\\\)

where,

a = deceleration = ?

s = distance traveled = 0.1 m

Vf = Final Speed = 0 m/s (it eventually stops)

Vi = Initial Speed = 300 m/s

Therefore,

\(2a(0.1\ m) = (0\ m/s)^{2} - (300\ m/s)^{2}\\a = \frac{-90000\ m^{2}/s^{2}}{0.2\ m}\\\\\)

a = -450000 m/s² (negative sign shows deceleration)

1.

Now, we calculate the force using Newton's Second Law:

\(F = ma\\F = (0.02\ kg)(-450000\ m/s^{2})\\F = - 9000\ N\)

Negative sign shows decelerating force.

For work done:

\(Work\ Done = W = Fs\\W = (9000 N)(0.1\ m)\)

W = 900 J

Answer:

If an atom loses or gains electrons, it becomes an ion with a positive or negative charge. So an ion is a special case of an atom when it has a total charge that is not zero. Usually if someone is talking about an atom with a positive or negative total charge, they will call it an ion rather than just an atom

Explanation:

The hazards of using electricity in this kitchen include the following below:

Risk of electric shocks: These electrical appliances use an electric source for their various functions in which electric current flows through them when

turned on. Exposure and contact of the naked wire with individuals will bring

about shock.

Risk of burns: The kitchen has various heating appliances such as toaster,

kettle,iron and oven which may result in burns if not carefully handled.

Risks of fire : The heat and electric current from these appliances can trigger a spark and fire which may raze down the building is also another hazard.

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Answer: the answer is carbon monoxide

Explanation:

hope this helps :)

The time it takes you to slow to 5 m/s will be 5 seconds. Newton's first equation of motion is employed in a given problem.

The change of displacement with respect to time is defined as the velocity.  Velocity is a vector quantity. it is a time-based component.

Given information;

Final velocity,v= 5 m\sec

Initial velociyt,u=20 m/sec

Acceleration,a=- 3m/s²

Time period,t=-?

From Newton's first equation of motion as;

\(\rm v = u+at \\\\ t= \frac{v-u}{a} \\\\ t= \frac{5 \ m/sec -20 m/sec }{-3 \ m/sec^2} \\\\\ t= 5 \ sec\)

Hence, the time it takes you to slow to 5 m/s will be 5 seconds.

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The correct answer is B. According to Newton's law of universal gravitation, the gravitational force between two objects is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers.

In simpler terms, as objects get closer together, the gravitational force between them increases.

When the distance between two objects decreases, the denominator of the equation (distance squared) becomes smaller, resulting in a larger force. Conversely, when the distance increases, the denominator becomes larger, resulting in a smaller force.

It is important to note that the mass of an object does not directly affect the strength of the gravitational force between two objects. However, a higher mass will lead to a greater gravitational force when compared to a lower mass, but only because the force is being exerted on a more massive object. The mass of an individual object doesn't directly affect the gravitational force it experiences from another object. option B

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The value of the normal force on the object of mass 50 kg such that it experiences a friction force of 5 Newton is equal to 490 Newton.

Friction force is a force that opposes the force. It acts in the direction opposite to the intention of the motion of the object ,it is a non conservative force in nature.

Normal force is a type of force that's perpendicular to the surface of the object when it is placed in contact with another surface the SI unit of normal force is the same as force in general that is Newton.

Given:

Surface area of the sphere = 6 u

Mass of the sphere = 50 kg

First we use the mass value of the sphere, we will calculate the value of the weight of a sphere so that we know force against which against which the normal force will be acting.

Weight of the sphere = 50 × 9.8

Weight of the sphere = 490 Newton

Now since the normal force is being used to balance of the weight of the sphere we can say that the value of the normal force will be equal to 490 Newton.

Therefore, The value of the normal force on the object of mass that it experiences a friction force of 5 Newton is equal to 490 Newton.

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Answer:

Gases are element .We can change the state of matter by the process of melting,evaporation,sublimation,freezing,condensation.

To solve problems involving waves, it's important to know the relationships between frequency, wavelength, and speed, which are given by the formulas v = f λ and T = 1/f, where v is the speed of the wave, f is the frequency, λ is the wavelength, and T is the period of oscillation.

The period of the tree is T=1/f= 1/58.0 Hz = 0.0172 s.

The wavelength of the wave is λ = 2 (crest to trough distance) = 2 (3.4 m)  = 6.8 m.

The speed of the sound wave is v = f λ = (285 Hz) (1.5 m) = 427.5 m/s.

The distance to the other side of the canyon is d = (speed of sound) × (time for echo to return) / 2 = (336.0 m/s) × (5.5 s) / 2 = 924 m.

The wavelength of the radio waves emitted by WKLB is λ = c / f = 3 x 10^8 m/s / 97.1 x 10^3 Hz = 3.09 m.

The speed of the water waves is v = λ / T = (7 m) / (3 s) = 2.33 m/s.

The wavelength of the water waves is λ = v T = (2.9 s) (2.33 m/s) = 6.74 m.

The frequency of the pulses is f = 1/T = 1/0.84 s = 1.19 Hz.

The speed of the wave is v = λ / T = (1.9 cm) / (0.95 s) = 2 cm/s.

The frequency of the sound wave is f = v / λ = 340 m/s / 2.3 x 10^-3 m = 1.48 x 10^5 Hz.

The speed of sound in air at 29.2°C is v = 331 m/s + (0.6 m/s/°C) × (29.2°C) = 349.5 m/s.

The wavelength of the sound wave is λ = v / f = (331 m/s + (0.6 m/s/°C) × (7.9°C)) / (40.7 Hz) = 8.06 m.

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