( this is science but there’s no subject for that so ) Q: Was there work done? Describe the energy in the situation as well.
2. Answer the questions for this block.
3. Answer the questions for this block

Answer:

50m/s

Explanation:

a =(V-U)/t

V=? , U = 44m/s, t= 3s, a = 2m/s²

so, using the equation,

2= (V -44)/3

V = 50m/s

Answer: Depending on the factors, combining two chemicals that aren't designed to interact might result in an explosion, an unintended chemical reaction, or a misleading result.

What is explosion ?

An explosion is a sudden increase in volume accompanied by a tremendous energy release that typically results in the production of high temperatures and the discharge of high-pressure gases. High explosive detonations produce supersonic explosions that move through shock waves.

Explosions often fall into one of three categories: chemical, mechanical, or nuclear. Every kind of explosion has the potential to be devastating and serious, wreaking unimaginable damage on the local populace, environment, and infrastructure.

What causes gamma ray bursts is one of the largest unsolved questions of all. These bursts, which happen around once every day, are the most powerful explosions known to science.

Thus, depending on the factors, combining two chemicals that aren't designed to interact might result in an explosion, an unintended chemical reaction.

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The velocity of a vehicle is typically expressed relative to ground.

Velocity is the speed of something that is given direction.

velocity is the measurement  to a  body's "pace of change of  the displacement in relation to time" whenever the main  body is traveling through along a straight route.

It is common knowledge of  that the word "linear" refers to be something that is totally straight; therefore,  when the body moves in a straight path, it is said to be linear velocity .

Alternatively, velocity is the  distance traveled by a body traveling in a specified to the direction during of a predetermined period of time. Thus, the fundamental idea of linear velocity is the  provided by the union of these two quantities.

Because it always has the direction of velocity is a vector.

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The disk will continue to spin if the ring strikes it off-center, but the moment of inertia will be affected.

The disk will be out of balance due to the ring's off-center placement, which will result in a lower moment of inertia than it would have if the ring were centered. The disk will therefore not spin as quickly or for as long as it would if the ring were in the middle.

This implies that the ring's rotational energy will not be dispersed uniformly, leading to an uneven, or skewed, rotation. The off-center ring's inability to accurately reflect the moment of inertia will result in an erroneous measurement of it.

What is moment of inertia?

The term "moment of inertia" refers to a physical quantity that quantifies a body's resistance to having its speed of rotation along an axis changed by the application of a torque (turning force).

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The frequency of the siren perceived by the observer is 2,566 Hz.

Calculation:

F = fo(Vsound +V)/(Vsound⁻V source) 2000*(345+24)/345 = 2,566 Hz.

Frequency describes the number of waves passing through a particular location at a particular time. So if the wave takes 1/2 second to travel, the frequency is 2 per second. If it takes 1/100th of an hour, the frequency is 100 per hour.

The term frequency refers to the number of waves passing through a fixed point in a unit of time. It also describes the number of cycles or vibrations an object undergoes in periodic motion in a unit of time. The frequency of a particular data is the frequency with which the data value occurs. Denote the frequency of the data values ​​by f.

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Blood pressure decreases is expected to happen to the total peripheral resistance (tpr) when the hand is placed in the ice cold water.

Hypertension is characterized by an increase in peripheral resistance overall brought on by both functional and structural changes in the arterioles, and endothelial malfunction is a significant factor in the rise in arteriolar tone. TPR is influenced by a number of variables, including blood viscosity and volume as well as hormone and neurotransmitter levels in the blood.

Hypertension is characterized by an increase is total peripheral resistance brought on by both changes in structure and function in the arterioles, and angiogenesis is a significant factor in the rise in arteriolar tone.

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Answer:

40 m/s

Explanation:

F = ma (force = mass * acceleration)

a = F/m

a = 200 N / 50 kg

a = 40 m/s

The force applied to the dolly was 6N.

Acceleration is the rate of change in velocity. It involves a change in speed and direction. When acceleration involves a change in speed only: Positive acceleration it occurs when an object speeds up. Negative acceleration it occurs when an object slows down.

Acceleration is a change of velocity over a period of time, expressed by the equation below.

F = ma

where f = force applied

m = mass of the body

a = acceleration of the body

F = ma

F = 30 x 0.2

F = 6N

In conclusion, the dolly received a force of 6N from Fred.

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Answer:

by calculating the total area under the displacement of the graph

34.65 is the value of the decay constant of a radioactive substance having a half-life of 0.02sec.

Half-Life: It is the amount of time it takes for half of a Radioactive particular sample to react particular quantity requires to reduce its initial value to half. That means the time taken by the radioactive substance or isotopes to decay half.

Half-Life Formula :t₁/₂ = 0.693/λ

Where as t1/2 is Half-Life of a radioactive substance

λ= decay constant  

We have t1/2 = 0.02sec substitute in the formula

0.02=0.693/λ ⇒λ= [tex]\frac{0.693}{0.02}[/tex]

λ= 34.65

The decay constant of a radioactive substance having a half life-life of 0.02 is 34.65.

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The length of skidding marks will be of 46.49m

Acceleration is the rate at which the direction and speed of motion change over time. It is said to have been accelerated when something changes its direction and moves faster or slower. Motion on a circle accelerates even when the speed is constant because the direction is constantly changing.

Acceleration is the term for the rate at which speed changes. Velocity is a vector quantity because it has both a magnitude and a direction component. Acceleration is also a vector quantity since it is simply the rate at which velocity changes.

Given m = 1000 kg

v = 27 m/s

µ = 0.80

we have a = µ g and v² - u² = 2as

then for s = u²/2gµ

s = 27²/2 X 9.8 X 0.8

s = 46.49 m

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Complete question is " A driver in a 1000 kg car traveling at 27 m/s slams on the brakes and skids to a stop. If the coefficient of friction between the tires and the horizontal road is 0.80, how long will the skid marks be?".

The changes in the internal energy of the system -164 KJ.

Solution:

change in internal energy = q + w

= -105 KJ(+ 57 kg)

= -164 KJ.

The change in internal energy of the system is the sum of heat transferred and work done. The heat flux is equal to the change in internal energy of the system plus the PV work done. The change in internal energy of the system is the sum of heat transferred and work done.

The heat flux equals the change in internal energy of the system plus the PV work. An isolated system cannot exchange heat or interact with its surroundings, so its internal energy change is equal to zero. But in a cyclical process, the total change in the internal energy of the system is zero.

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The findings of Fritz Zwicky and Jan Oort suggest the motion of neighboring stars in our galaxy and galaxies in the Coma cluster do not follow Newton's law of gravity.

In fact, the gravitational pull that dark matter appears to have on visible stuff is the only way that researchers have been able to deduce its existence. Dark matter, which makes up about 27% of the cosmos, appears to outnumber visible matter by a factor of nearly six to one.

Given the rates at which astronomers observe the galaxies revolving, the prevailing view among cosmologists holds that dark matter permeates nearly every galaxy and provides the extra gravity that prevents stars from swirling out into space.

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Answer:

The PPC Cycle refers to Production Planning Control. It has 3 phases—preplanning, planning, controlling. The Pre-Planning Phase consists of product development, sales forecasting, factory or plant layout, equipment selection policy, and preplanning of production just prior to large scale production.

The astronaut faces 1.71 rad/s angular velocity, 17.1 m/s linear velocity, 29.2 centripetal acceleration, 3 g's are experienced, and 2044 N of centripetal force. The torque experienced is zero

What is rotational motion?

An object is said to be in rotational motion when it is travelling in a circular route around a fixed axis. Centrifugal force is a radially outward force that the item experiences as a result of this motion.

The image given below explains the conversion. The torque is zero since there is no tangential force.

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With the assumption that 250 meters is horizontal range, the ball remain in the air for a period of 14.7 s

Range is the horizontal distance from the point of projection to the point where the projectile hits the projection plane again.

Given that In a competition, a football player kicked a ball 250 meters into the air. While in flight, the ball traveled at an average speed of 17.0 m/s.

The parameters are;

R = uT

Substitute all the parameters into the formula

250 = 17T

T = 250/17

T = 14.7s

Therefore, the ball remained in the air for 14.7 s long.

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A same crate gains twice as much potential energy when it is raised 20 meters alternatively.

Potential energy is a form of energy that is dependent on the relationship between different system components. When a springy is stretched or stretched, its potential energy increases. If a steel ball is pushed above the ground as opposed to descending to the ground, it has more energy stored.

An object has the capacity to store energy because of its position. As an example, a destruction machine's large ball is conserving energy by being held in a high position. This positional force that has been saved is known as electric potential.

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Condensed water droplets collect other water droplets to form the collector drop until they fall from the clouds as rain. In this way rain is formed in the tropics where the air is warmer.

A significant volume of water evaporates and is released into the atmosphere when water bodies are heated during the day. Evaporation is the term for this. Water vapour is carried upward by the hot air as it rises. The air cools and expands as it rises. Condensation is the term for this occurrence. Clouds are created as a result of water vapour condensation. With the assistance of the wind, these clouds are transported away, and when they become heavy, they drop to the ground as rain.

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Answer:

Explanation:

it provides warmth and protection

The size of the habitable zone around a star of spectral class g is larger to the size of the habitable zone around a spectral class m star.

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Answer:

O warm ocean temperatures, moderate winds, and moist atmospheric layers

Acceleration of the bookshelf is 1.30 m/[tex]s^{2}[/tex] when mass is 51.5 kg and force is 67 N.

To find the acceleration, we use newton's second law of motion. According to newton's second law of motion,

" The acceleration of an object is directly proportional to the net force acting on the object while being inversely proportional to its mass." Newton's second law of motion gives the measurement of force.

Acceleration is the result of force on an object.

The formula for finding acceleration from this law is.

Acceleration = Force/ Mass

a = F/m

So, a = 67/51.5 m/[tex]s^{2}[/tex]

= 1.30 m/[tex]s^{2}[/tex]

Acceleration in this case is 1.30 m/[tex]s^{2}[/tex]

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A transmission Grid is called a network of transformers and transmission cables that transfer electrical power from power stations to consumers

Electrical transmission is the process of providing highly efficiently generated electricity to a district or over larger and longer distances. The main point of the grid is to give people access to electricity 24 hours without interruption and without any trouble in populated areas. Transformers play a crucial role in this. Transformer help in increasing the voltage of the grid to make it more powerful and effective. It helps in the feasible transmission of the grid.

The electrical transmission system is combined with power plants in cities, distribution systems for easier access to electricity, and sub-stations for backup and other purposes which is to form what is known as the electrical grid. The grid meets people's electricity requirements and is what gets the electrical power from its generation to its end use. Since power plants are most often located outside of densely populated areas, the transmission system must be fairly large scale.  

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A network of transformers and transmission cables transfers electrical power from power stations to consumers is called as a transmission grid.

Electric power transmission is the bulk movement of electrical energy or power from a generating site, such as a big power plant, to an electrical substation or other places. The interconnected lines which facilitate this movement of electrical energy form a transmission network or transmission grid.

A transmission grid is a network of power stations, transmission lines, and the substations. Energy is generally transmitted within a grid through the three-phase AC. Single-phase AC is used only for distribution to end users however, it is not usable for the large polyphase induction motors. The two-phase transmission was used but it either required a four wires system or three wires with unequal currents. Higher order phase systems require more than three wires, but they cannot deliver little or no benefit.

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If you pull yourself to the center of the merry-go-round,  the rotation of the merry go round will decrease.

This is the radial acceleration experienced by a person moving in a circular path as the merry-go-round rotates about its mean position.

a = v²/r

where;

From the formula given above, as the radius of the merry go round increases, the centripetal acceleration of the merry go round decreases.

v = ωr

where;

Thus, when the radius of the circular path decreases, the speed of the merry go round will decrease as well.

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If the bob of a straightforward pendulum swings between points X and Y, then its period is 0.86 seconds.

a system made composed of a string that hangs from an overhead support as well as an object at the string's bottom. Gravity and the string's combined force cause the object to swing back and forth. Bob the Pendulum any item that is dangling from the pendulum string.

Because a pendulum travels back to towards the mean position due to the influence of gravitational force, it is used to gauge the gravitational effect. A pendulum can be used to identify the moment because its time period is constant. A clock's hands are kept moving by a pendulum inside.

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Anita's power rating during this portion of the climb is 15680 J.

Rock climbing is an activity in which people climb up, down, or over natural or man-made rock cliffs. The objective is to reach the top of the terminus of a path without falling. It is under the physical Education.

Given that,

mass (m) = 80.0 kg

time = 100 sec

height = 20.0 m

Now, Anita needs to apply a force that is equal to her weight in order to elevate her body a distance of 20.0 m.

Thus, force is equal to:

F =  (80 kg) × (9.8 N/kg)

F = 784 N.

So the work she does to lift her body in 20.0 m is:

W =  (784 N) ×(20.0 m) × cosine(0°)

W = 15680 J.

So, Anita's power rating during this portion of the climb is 15680 J.

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At an average speed of 7m/s, the distance covered in one second is 7 meters.

Speed is simply referred to as distance traveled per unit time.

It is expressed mathematically as;

Speed = Distance ÷ time.

Given the data in the question;

Plug the given values into the above formula and solve for distance traveled.

Speed = Distance ÷ time

Distance = Speed × Time

Distance = 7m/s × 1.0s

Distance = 7ms/s

Distance = 7m

Therefore, in a second, the person covers 7 meters.

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