A coin is dropped off of a building from rest at a height of 155 meters. What is the velocity of the coin as it hits the ground?

Answer:

Sexually transmitted diseases are spread by direct contact with bodily fluids.

Explanation:

if you have a disease you can give it to someone by having sex because your fluids go into or either combine

Answer:

B

Explanation:

One double bond consists 4 electrons, so 2 double bonds means 8 electrons

Answer: 8 electrons

Explanation:edg

The coefficient of friction is \(\( \frac{v_{0}}{g T} \).\)

To prove that the coefficient of friction is \(\( \nu_{0} / g T \)\), let's break down the problem step by step.

1. The initial velocity of the object is \(\( v_{0} \)\).
2. The object comes to rest, which means its final velocity is 0.
3. The time it takes for the object to come to rest is \(\( T \)\).

Now, let's use the equation of motion to solve for the coefficient of friction.

The equation of motion for an object sliding on an icy surface is:

\(\( v = v_{0} + \mu g t \)\)

where \(\( v \)\) is the final velocity, \(\( \mu \)\) is the coefficient of friction, \(\( g \)\) is the acceleration due to gravity, and \(\( t \)\) is the time.

In this case, we know that \(\( v = 0 \) and \( t = T \),\) so the equation becomes:

\(\( 0 = v_{0} + \mu g T \)\)

Rearranging the equation, we get:

\(\( \mu = \frac{-v_{0}}{g T} \)\)

Since the coefficient of friction cannot be negative, we can write the equation as:

\(\( \mu = \frac{v_{0}}{g T} \)\)

Therefore, the coefficient of friction is \(\( \frac{v_{0}}{g T} \).\)

This proves that the coefficient of friction is \(\( \frac{v_{0}}{g T} \)\).

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Some foods, such as coconut oil, are usually classified as solid fats even though they are liquid or soft at room temperature.

Some foods, such as butter, margarine, and shortening, are usually classified as solid fats even though they are liquid or soft at room temperature. This is because they are high in saturated and/or trans fats, which are solid at room temperature. These types of fats have been linked to increased risk of heart disease, so it is recommended to limit intake of solid fats and choose healthier fats, such as unsaturated fats found in nuts, seeds, and oils like olive and canola.

Additionally, it is important to check food labels for the amount of saturated and trans fats in a product and choose lower fat options when possible.

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Answer:

0.011

Explanation:

Answer:

4 km/h

Explanation:

160/5 = 32

140/5 = 28

32-28= 4

The difference in average speed between two cars, one that traveled 160 kilometers in 5 hours, and the other that traveled 140 kilometers in the same time would be 4 km/hr.

The total distance covered by any object per unit of time is known as speed. It depends only on the magnitude of the moving object.

As given in the problem we have to find out the difference in average speed between two cars, one that traveled 160 kilometers in 5 hours, and the other traveled 140 kilometers at the same time.

The average speed of the car that traveled 160 kilometers in 5 hour = 160 / 5 = 32 km / hr

The average speed of the car that traveled 140 kilometers in 5 hour = 140 / 5 = 28 km / hr

The difference in the average speed = 32 -28

                                                              = 4 km / hr

Thus  , the difference in the average speed of the car would be  4 km / hr .

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Answer:

4000 J

Explanation:

KE = (1/2)(m)(v^2)

KE = .5*500*(4^2)

KE = 4000 J

Each ball has an electric field surrounding it, and the magnet creates a magnetic field as well.

The area of space surrounding an electrical charges particle or object within which the charged body perceives force is known as the electric field .Examples: -Electric fields are created by charges and their configurations, such as capacitor and battery cells.

Each location in space at which a charge exists in any form can be regarded to have an electric field attached to it. The electrostatic force per mass unit is another name for an electric field. The electric field's equation is stated as E = F / Q.

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The presence of a thin film of water on a glass windowpane causes it to reflect less light compared to when it is perfectly dry. This is because water has a different Refractive index than air, which is the medium surrounding the dry windowpane.

The refractive index is a measure of how much light is bent as it passes through a medium. When light travels from air into a different medium, such as water, it undergoes refraction, which causes it to change direction. The refractive index of water is higher than that of air, meaning that light bends more when it enters water.

When a glass windowpane is dry, the light passing through it experiences a small amount of reflection due to the difference in refractive index between air and glass. However, when a thin film of water is present on the windowpane, light encounters two interfaces: air to water and water to the glass. These additional interfaces cause more of the light to be refracted and transmitted through the glass, resulting in less reflection.

In summary, the presence of a thin film of water on a glass windowpane reduces the amount of light reflected because of the difference in refractive index between air and water, which leads to increased refraction and transmission of light through the glass.

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Answer:

a. Vf = 39.24 [m/s]

b. Vf = 31.24 [m/s]

c. Vf = 47.24 [m/s].

Explanation:

To solve this problem we can use the following equation of kinematics. We have to keep in mind that the gravitational acceleration acts downwards, therefore when the rock falls towards the abyss it has the same direction of the acceleration and that is why the gravitational acceleration has a positive sign in the equation.

\(v_{f}=v_{o}+g*t\)

where:

Vf = final velocity [m/s]

Vo = initial velocity = 0 (when the rock is dropped)

g = gravitational acceleration = 9.81 [m/s²]

t = time = 4 [s]

a.

\(v_{f}=0+9.81*4\\v_{f}= 39.24 [m/s]\)

b.

In this particular situation, the acceleration will be taken as negative because the gravity is pointing in the opposite direction of the movement of the rock.

\(v_{f}=8-(9.81*4)\\v_{f}=-31.24[m/s]\)

The negative sign in the answer tells us that the rock no longer moves up instead it does downwards when 4 seconds have passed.

c.

\(v_{f}=8+(9.81*4)\\v_{f}=47.24[m/s]\)

1) workstation

2) Network interface card

3) hub

4) server

Hope this helped you- have a good day bro cya)

In the Watt's Governor, fly balls represent the centrifugal force of the spindle.

A Watt's Governor is a device that is designed to control the speed of a steam engine or other machinery by regulating the amount of fuel delivered to the engine.

What is a Watt's Governor?

A Watt's Governor is an apparatus designed to automatically control the speed of a steam engine by regulating the fuel (coal or oil) going to the engine. The Watt's Governor was invented by James Watt in 1788. It is a simple device that consists of two rotating balls or flyballs, which are connected by a spindle. The spindle is connected to the engine and rotates as the engine speeds up or slows down.

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The distance travelled by the athlete given the play lasted for 5.0 seconds is 21.25 m

We'll begin by listing out the parameters given from the question. This is given below:

From the given parameters, we can determine the distance as follow:

s = ut + ½at²

s = (0 × 5) + (½ × 1.7 × 5²)

s = 0 + 21.25

s = 21.25 m

From the above calculation, we conclude that the athlete ran 21.25 m during the 5 seconds play.

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Answer:

Cuando viajo en un automóvil lo que se mueve soy yo en realidad, estoy tomando como sistema de referencia el mundo externo al automóvil sin embargo si tomamos como un sistema de referencia algún objeto que se encuentre dentro del automóvil entonces lo que se mueve es lo que me rodea

A kettle was tested for its energy efficiency. Its power rating was 900 W. Over the course of 4 minutes and 30 seconds, its useful energy output was 0.05 kWh

Energy is referred to by scientists as the capacity for work. People have figured out how to transform energy from one form to another and then use it to accomplish tasks, making modern civilization possible.

Thermal energy, radiant energy, chemical energy, nuclear energy, electrical energy, motion energy, sound energy, elastic energy, and gravitational energy are among the several types of energy.

The ability to perform tasks is referred to as energy. Formula. Potential energy is the energy that an object has stored because of its position and height, and it may be calculated using the following formula: P.E. equals mgh.

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To create a diffuse sound field within a theater, the goal is to distribute sound energy evenly throughout the space, reducing the presence of distinct echoes and reflections.

Among the given options, the treatment that would best contribute to this acoustic characteristic is:

(c) Velvet curtains hung on the side walls of the theater.

Velvet curtains have a soft and textured surface that can absorb and scatter sound waves, preventing them from reflecting directly back into the audience or creating focused sound reflections. This helps to reduce the presence of strong reflections and echoes, promoting a more diffuse sound field within the theater.

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The work done by the pump to fill the 1000-kg water tower is 490500 Joules.

Every time a force pushes something over a distance, work is done. By multiplying the force by the distance moved in the force's direction, you may determine the energy transferred, or work done.

To calculate the work done by the pump to fill the water tower, we can use the formula:

W = F * d * cos(θ)

Where W is the work done, F is the force applied, d is the distance moved, and θ is the angle between the force vector and the displacement vector.

In this case, the force applied is the weight of the water being pumped, which can be calculated as:

F = m * g

Where m is the mass of the water (1000 kg) and g is the acceleration due to gravity (9.81 \(m/s^2\)).

F = 1000 kg * 9.81 \(m/s^2\) = 9810 N

The distance moved is the average height of the water tower, which is 50 m.

The angle between the force vector and the displacement vector is 0 degrees, since the force is applied vertically upwards and the displacement is also in the vertical direction.

Substituting the given values, we get:

W = F * d * cos(θ) = 9810 N * 50 m * cos(0°) = 490500 J

Therefore, the answer is 490500 Joules.

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Answer:

Given that voltage is a measurement of energy per unit charge, Kirchhoff's loop rule is based on the law of conservation of energy, which states: the total energy gained per unit charge must equal the amount of energy lost per unit of charge.

Explanation:

-google

Answer:

1A

Explanation:

Given parameters:

Current  = 2A

Resistance  = 0.5Ω

Unknown:

Potential difference  = ?

Solution:

To solve this problem, we use ohm's law which expressed below:

              V  = IR

V is the potential difference

I is the current

R is the resistance

   Now insert the parameters and solve;

           V  = 2 x 0.5  = 1A

Answer:

Time = 12.43 years

Mass = 4.71.43kg

Explanation:

Given the following :

Distance = 8.7 light years

Speed = 70% the speed of light

Diameter = 6m

Lengtg = 25m

Density = 1 hydrogen atom/m^3

Mass of proton(Me) = 1.673x 10^-27

A.) time it takes your spaceship to reach Sirius :

From the relation: Speed = (distance / time)

Time = distance / speed

Time = (70/100) × 1 light year

Distance = 8.7 light years

Time = 8.7 / 0.7 = 12.4285 years

Time = 12.43 years

B.) Mass of inter-stellar gas that collides with the spaceship can be calcuted by finding the product of the surface area of the cylindrical space ship and the mass of proton.

That is ;

surface area * mass of proton

Surface area of a cylinder = 2πrh + πr^2×Me

= 2πrh + Me×πr^2)

=( 2 × 22/7 × 3 × 25) + (22/7 × 3^2 × 1.673 * 10^-27)

= 2× 235.714 + 28.285) × 1.673 * 10^-27

= 471.428 + 47.31 * 10^-27

= 471.428 + 4.73 × 10^-26

= 4.71.43kg approximately

The kinetic energy of the bullet-block system is equal to the potential energy of the bullet-block system when it reaches its maximum height.

According to the principle of conservation of linear momentum, momentum before collsion is equal to momentum after collision. Let us now answer the questions individually.

1) The momentum of the bullet before collsion = (0.001 Kg * 35 m/s) = 0.35 Kgms-1

2) The kinetic energy of the bullet before collision = 0.5 * 0.001 * (35 m/s)^2 = 0.6125 J

3) Velocity after collsion is obtained from;

(0.001 Kg * 35 m/s) + (2 kg * 0 m/s) = (0.001 Kg + 2 kg) v

v = 0.35/2.001 =

v=0.1749 m/s

4) Total kinetic energy after collison = 0.5 * (0.001 Kg + 2 kg) * (0.1749 m/s)^2

= 0.031 J

5) The maximum possible potential energy of the bullet-block system when it reaches its maximum height = Total kinetic energy after collison = 0.031 J

6) The  maximum possible height of the bullet-block system is obtained from;

PE = mgh

h = 0.031 J/(0.001 Kg + 2 kg) * 9.8 ms-2

h = 0.0015 m or 0.15 cm

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-266

What is acceleration?

Acceleration is the rate of change of the velocity of an object with respect to time. Accelerations are vector quantities (in that they have magnitude and direction).

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The tension in the string if a rod PR is balanced on a pivot at the end R while a string is used to support the rod at P is 6 N

Moment = Force * Perpendicular Distance

Let us consider the pivot side be initial point,

Since the rod is balanced,

CM = ACM

CM = Clockwise moment

ACM = Anticlockwise moment

F = 9 N

PQ = 15 cm = 0.15 m

QR = 30 cm = 0.3 m

PR = PQ + QR

PR = 0.15 + 0.3

PR = 0.45 m

CM = W * QR

CM = 9 * 30

CM = 2.70 N m

ACM = T * PR

ACM = 0.45 T N m

2.70 = 0.45 T

T = 6 N

Therefore, the tension in the string is 6 N

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Answer:

Subduction happens where tectonic plates crash into each other instead of spreading apart. At subduction zones, the edge of the denser plate subducts, or slides, beneath the less-dense one. The denser lithospheric material then melts back into the Earth's mantle. Seafloor spreading creates new crust.

Explanation:

hope it helps i do not know if that is the kind of answer you wanted or not but i tried

Answer:

\( \sqrt{ \frac{g}{12 \cos(35) } } \)

where g is acceleration due to gravity

Explanation:

You should consider the tension in the string along the horizontal and vertical axis as well as the force of gravity acting on the ball.