you fire a bullet from a gun that is 0.981 meters above ground aimed perfectly parallel to the ground. it has an initial velocity of 981 m/s. how long will it take the bullet to reach the ground?

Answer:

7 hours.

Explanation:

This is because you are traveling 5 kilometers per hour so 5 multiplied by 7= 35.

If the time interval during which it falls is cut in half, the distance it fall will be decreased by a factor of 4.

When there is an uniform acceleration,

s = vt - 1/2 a\(t^{2}\)

where,

s = Displacement or distance travelled

v = Final velocity ( Here v = 0 )

a = Acceleration

t = Time

\(s_{1}\) = - 1/2 a\(t_{1} ^{2}\)

\(s_{2}\) = - 1/2 a\(t_{2} ^{2}\)

Given that,

\(t_{2}\) = \(t_{1}\) / 2

\(t_{1}\) = 2 \(t_{2}\)

Rate of change of displacement \(s_{2}\) / \(s_{1}\) = ( - 1/2 a\(t_{2} ^{2}\) ) / ( - 1/2 a\(t_{1} ^{2}\) )

                                                                = \(t_{2} ^{2}\) / 4\(t_{2} ^{2}\)

                                                            \(s_{2}\) = \(s_{1}\) / 4

The equation s = vt - 1/2 a\(t^{2}\) is an equation of motion. Equations of motion describes a physical system's motion with respect to time.

Therefore, If the time interval during which it falls is cut in half, the distance it fall will be decreased by a factor of 4

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Answer:

8.6348020882604e-23

Explanation:

Average Velocity=Total Displacement/Total Time

\(\\ \sf\longmapsto Average\: Velocity=\dfrac{825}{118}\)

\(\\ \sf\longmapsto Average\:Velocity\approx 8m/s\)

 the direction of the magnetic field surrounding the wire is perpendicular to the direction of the conventional current flow. This means that if the current flows up the wire, the magnetic field will circulate around the wire in a clockwise direction as viewed

the direction of the magnetic field surrounding the wire is perpendicular to the direction of the conventional current flow. This means that if the current flows up the wire, the magnetic field will circulate around the wire in a clockwise direction as viewed from above. Conversely, if the current flows down the wire, the magnetic field will circulate around the wire in a counterclockwise direction as viewed from above. This relationship between the direction of the magnetic field and the direction of the current flow is known as the right-hand rule.
The direction of the magnetic field surrounding the wire can be determined using the right-hand rule.

Given the direction of the conventional current (indicated by the arrow), follow these steps to find the direction of the magnetic field:

1. Point your right thumb in the direction of the conventional current (following the arrow).
2. Curl your fingers around the wire, representing the direction of the magnetic field.
3. The direction your fingers curl around the wire is the direction of the magnetic field surrounding the wire.

By applying the right-hand rule, you can determine the direction of the magnetic field surrounding the wire based on the direction of the conventional current.

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The minimum applied force that will keep the box at rest is 55 N.

The term frictional force refers to the force that opposes the motion of a body. We have the following information'

Given that;

μ = F/R

R = mgcosθ = 26.8 kg × 9.8 ms-2 × cos13 =255.9 N

F = μR

F =  0.215 × 255.9 N

F = 55 N

The minimum applied force that will keep the box at rest is 55 N.

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Answer:

Rock

Explanation:

Right on edg 2021 and 2020000000:P

Explanation:

u=24

v=0

a=-0.29

s=

v^2=u^2+2as

s=(v^2-u^2)/2a

s=(0-576)/0.58

s=-575.42

The match the following is as follows:

a) Amplitude - The distance from the equilibrium position of the medium to a point of its maximum movement.

b) Period - The time required for a single wave to pass through a given point.

c) Frequency - The number of complete waveforms passing a given point per unit time.

d) Wavelength - The distance from one point of a wave to the corresponding point on the next wave.

The amplitude measures how far the wave deviates from its equilibrium or rest position.

It's the duration between successive identical points on a wave, such as two consecutive crests or troughs.

Frequency refers to the number of complete wave cycles passing a particular point in one second. It's a measure of how often a wave repeats its pattern and is inversely related to the period.

Therefore, this way matches of the pair are obtained.

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Amplitude is the maximum displacement from the equilibrium position (match a). Period is the time needed for a wave to pass a point (match c). Frequency is the number of complete waveforms per unit time (match d). Wavelength is the distance between corresponding points on a wave (match b).

To match the terms with their definitions:

Amplitude matches with a) the distance from the equilibrium position of the medium to a point of its maximum movement. Amplitude refers to the maximum displacement from the equilibrium position, such as the height of a wave from its central line.

Period matches with c) the time required for a single wave to pass through a given point. It is the time it takes for one complete wave cycle to pass a specific point.

Frequency corresponds to d) the number of complete waveforms passing a given point per unit time. This measures the number of waves that pass a point per second.

Wavelength matches with b) the distance from one point of a wave to the corresponding point on the next wave. The wavelength is the distance between corresponding parts of a wave, such as from one peak to the next.

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Answer:

is that not positive energy out and the same with the negative energy.....

Explanation:

BY THE LOOKS OF IT.....THE POSITIVE ENERGY CIRCLE IS PUSHING OUT ENERGY AND THE NEGATIVE ENERGY CIRCLE IS DOING THE SAME ACTION.

Answer:

0.5

Explanation:

Given parameters:

Weight of object  = 300N

Force of friction = 150N

Unknown:

Coefficient of friction = ?

Solution:

Frictional force is a force that resists the motion of a body.

        It is mathematically expressed as;

                  frictional force  =  uN

Where u is the coefficient of friction

           N = Normal force = weight of the object

Now input the parameters and find u;

             150 = u x 300

                 u = \(\frac{150}{300}\)   = 0.5

The coefficient of friction here is 0.5

A solenoid is any physical device capable of creating a magnetic field that is extremely uniform and intense inside, and very weak outside. For example, a coil of insulated and helically wound conductive wire of indeterminate length.

In the next pic we can see what are talking about:

An application of solenoid is as an elegtromagnet. An electromagnet is a type of magnet in which the magnetic field is produced by the flow of an electric current, disappearing as soon as said current ceases. Electromagnets generally consist of a large number of closely spaced coils of wire that create the magnetic field.

The operation of the solenoid can be describe as follows:

An electric current flowing in a wire creates a magnetic field around the wire, due to Ampere's Law:

To concentrate the magnetic field, in an electromagnet the wire is wound into a coil with many turns of wire lying side by side. The magnetic field of all the turns of wire passes through the center of the coil, creating a strong magnetic field there.

Answer: it’s A

Explanation: hope this is right!!!!

A. The acceleration of the train is –0.68 m/s²

B. The stopping distance is 660 m

This is defined as the rate of change of velocity which time. It is expressed as

a = (v – u) / t

Where

a = (v – u) / t

a = (0 – 30) / 44

a = –0.68 m/s²

s = (v + u)t / 2

s = [(0 + 30) × 44]/ 2

s = (30 × 44) / 2

s = 1320 / 2

s = 660 m

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The stationary mean not moving in this sentence. The correct option is A.

Potential energy in physics is the energy that an item retains as a result of its position in relation to other objects, internal tensions, electric charge, or other elements.

Any object that is raised from rest has energy that can be released at a later time; for this reason, it is referred to as potential energy.

The highest potential energy is present when a roller coaster is at rest at the summit of a slope. In this statement, the word stationary means immobile.

Thus, the correct option is A.

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If the environmental lapse rate (ELR) of the atmosphere surrounding a rising parcel of air is greater than the dry adiabatic rate (DAR) of 10°C/1000m, certain conditions and phenomena can be inferred.

When the ELR is steeper than the DAR, it indicates a condition of instability in the atmosphere.

This means that the surrounding air cools at a faster rate than a rising parcel of air would if it were undergoing adiabatic cooling.

As a result, the parcel of air becomes warmer compared to its surroundings, making it less dense and causing it to continue rising.

The steep ELR exceeding the DAR signifies an environment conducive to the development of convective processes such as thunderstorms, cumulus clouds, and other forms of unstable atmospheric phenomena.

The increased lapse rate creates an environment where the parcel of air continues to rise and can reach higher altitudes, potentially leading to the formation of significant weather events and atmospheric instability.

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Answer:

-mercury

-Venus

-earth

-Mars

-Jupiter

-Saturn

-Uranus

-Neptune

Explanation:

these are the 8 planets in the solar system <3

The direction of the magnetic field that allows a conducting wire to levitate is a magnetic field pointing directly downward.

When a conducting wire carries current and is placed in an external magnetic field, it experiences a force known as the Lorentz force. The Lorentz force on a current-carrying wire is given by the equation:

F = I * L * B * sin(theta)

Where:

- F is the force on the wire

- I is the current flowing through the wire

- L is the length of the wire

- B is the strength of the magnetic field

- theta is the angle between the wire and the magnetic field

For the wire to levitate, the force on the wire should be equal to the force due to gravity, but in the opposite direction. In other words, the upward force on the wire should counterbalance the downward force of gravity.

Since the current in the wire is flowing directly upward, the force on the wire due to the external magnetic field should also be pointing directly downward to achieve levitation. This means that the magnetic field should be perpendicular to the wire and pointing directly downward.

To allow a conducting wire carrying current directly up to levitate, the external magnetic field must be perpendicular to the wire and pointing directly downward.

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Answer:

As altitude increases and atmospheric pressure decreases, the boiling point of water decreases.

Answer:

b

Explanation:

because electromagnetic waves can travel in vacuum as they don't require particles to transfer energy from one point to another. they can also travel through mediums such as the wall or air, if not how do radio waves transfer energy in this hyper advanced world? through the air

hope this helps

please mark it brainliest

The power of a statistical test refers to its ability to detect statistically significant differences between groups or variables.

It is defined as 1-β, where β represents the probability of making a Type II error, or failing to detect a true difference. In other words, a high power value means that the test is more likely to correctly identify significant differences, while a low power value means that it is more likely to miss them. Power is influenced by a variety of factors, including sample size, effect size, and alpha level, among others. It is an important consideration when designing and interpreting statistical analyses.

The power of a statistical test is defined as the probability of rejecting the null hypothesis when it is false, or in other words, the probability of detecting a statistically significant difference when one actually exists. It is often denoted by the symbol "1-β", where β represents the probability of making a Type II error, which is the error of failing to reject the null hypothesis when it is false.

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Answer:

The RGB color system is known as a natural color system because it closely mimics the way humans perceive and experience color in the physical world. "RGB" stands for Red, Green, and Blue, which are the primary colors used in this system.

The natural color perception in human vision is based on the activation of three types of cone cells in the retina, which are sensitive to different wavelengths of light. The RGB color system models this trichromatic vision by combining varying intensities of red, green, and blue light to create a wide range of colors.

When red, green, and blue light are combined at full intensity, they produce white light. By adjusting the relative intensities of each primary color, different hues and shades can be achieved. The RGB color model uses a numerical scale from 0 to 255 to represent the intensity of each primary color, allowing for a wide spectrum of colors to be displayed on electronic devices such as screens and monitors.

The RGB color system is commonly used in various digital applications, including photography, graphic design, and display technologies. It is considered "natural" because it closely aligns with human perception and can reproduce a wide range of colors that appear similar to what we see in the physical world.

The current delivered by each generator can be determined by using Ohm's Law and Kirchhoff's Current Law. Each generator delivers approximately 18.16 amperes of current.

First, let's calculate the total resistance of each generator. Since each machine has a field resistance of 40 ohms and an armature resistance of 0.02 ohms, the total resistance of each generator is the sum of these two resistances:

Total resistance = Field resistance + Armature resistance
Total resistance = 40 ohms + 0.02 ohms
Total resistance = 40.02 ohms

Now, let's calculate the total generated EMF by summing up the EMFs generated by each generator:

Total EMF = EMF1 + EMF2 + EMF3
Total EMF = 240 volts + 242 volts + 245 volts
Total EMF = 727 volts

According to Ohm's Law, the current delivered by each generator can be calculated by dividing the total EMF by the total resistance:

Current delivered by each generator = Total EMF / Total resistance
Current delivered by each generator = 727 volts / 40.02 ohms
Current delivered by each generator ≈ 18.16 amperes

Therefore, each generator delivers approximately 18.16 amperes of current.

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Answer: The answer is in your heart

Explanation: I don't know, just trust °_°

It depends on the location on the periodic table and if it is easier to loose are gain electrons to fill the valence electron shell.

The electron affinity of the neutral atom of the element can show indicate whether or not the element is going the make positive or negative ions.  The higher the electron affinity is, the more the neutral atom wants to gain electrons.

The electron affinity for alkali metals and alkaline earth metals are low due to the fact that they are located on the left of the periodic table and only needs to loose 1 or 2 electrons to have a completed valence shell.

That means that they want to form cations (loose electrons).  Halogens have a high electron affinity since they are located on the right of the periodic table and only have to gain 1 electron to get a completed valence electron configuration.  That means that it forms anions.

Therefore, It depends on the location on the periodic table and if it is easier to loose are gain electrons to fill the valence electron shell.

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The path the bowling ball would most closely follow after leaving the airplane is horizontal direction.

Based on the law of inertia, which is the reluctance of an object to stop moving once in motion or start moving when it is at rest.

The bowling ball will maintain the path of the airline in the first few seconds of fall, after which it will change its path to vertical direction.

Thus, the path the bowling ball would most closely follow after leaving the airplane is horizontal direction.

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Answer:

Explanation:

The force acting on an object given it's mass and acceleration can be found by using the formula

force = mass × acceleration

From the question we have

force = 75 × 3

We have the final answer as

Hope this helps you

Answer:

Efficiency = 80%

Explanation:

Given the following data;

Mechanical advantage (MA) = 4

Ideal mechanical advantage (IMA) = 5

To find the efficiency of the machine;

Mathematically, the efficiency of a machine is given by the formula;

\( Efficiency = \frac {MA}{IMA} * 100 \)

Substituting into the formula, we have;

\( Efficiency = \frac {4}{5} * 100 \)

\( Efficiency = 0.8 * 100 \)

Efficiency = 80%

Wall pulls on the ladder with a 220 N force. A man who weighs 110 kg is standing halfway up a ladder that is 4.0 metres long. The ladder is incredibly light, and its base is 1.5 metres away from the wall.

A force in physics is an effect that has the power to alter an object's motion. A force can cause an object with mass to change its velocity, or accelerate (for example, moving from a condition of rest). Intuitively, a push or a pull can also be used to describe force. A body's mass is a fundamental characteristic.

Force*(1.5/2) equals N*sqrt[4-1.5/2].

110*9.81 * 0.75 = N * 3.708

N = 220 N

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