What is the most basic element of a living
organism?

We can demonstrate an exothermic reaction by adding calcium chloride crystals to water. This means that the reaction releases heat to the surroundings. Which of the following would we most likely expect to observe in this reaction?

Exothermic in terms of the discussion of thermodynamics describes a process or reaction that releases heat energy or light energy, electrical energy, or it could be sound energy. The origin of the word exothermic is from the Greek words "ex-" and "thermein".

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Answer:

Thermal energy can be transferred to one object to another in the form of heat. It causes molecules and atoms to collide with each other because of the rising of heat.

Explanation: Well thermal energy is a example of kinetic energy. It is heated by motion. It is heat that can be measured

As per the given values, and uncertainty of the speedometer the actual speed could be 61.33 km/h.

Uncertainty = 2.0 km/h

Measured value = 90 km/h

Calculating the Percent uncertainty -

= (Uncertainty / Measured value) x 100

= (2.0 / 90 ) x 100

= 2.22%

Now, assuming the speedometer has the same percent uncertainty at 60 km/h, this percent uncertainty can be used to determine the range of speeds.

Percent uncertainty = 2.22%

Measured value = 60 km/h

Calculating the range -

= (Percent uncertainty / 100) x Measured value

= (2.22% / 100) x 60

= 1.33

Calculating the Total speed -

= 60 + 1.33

= 61.33

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Complete Question:

If your speedometer has an uncertainty of 2.0 km/h at a speed of 90 km/h ,what is the percent uncertainty? (b) If it has the same percent uncertainty when it reads 60 km/h , what is the range of speeds you could be going?

Answer:

Explanation:

The gravitational force between two objects becomes weaker if the two objects are moved apart and stronger if they are brought closer together; that is, the force depends on the distance between the objects.

The gravitational force between two objects as the bodies become closer to each other increases.

Gravitational force is force of attraction between two masses. Gravitational force(F) between two bodies is directly proportion to the product of masses(m₁,m₂) of two bodies and inversely proportional to square of distance(r) between them. mathematically it is written as,

F ∝ m₁.m₂

F ∝ 1/r²

F = G m₁,m₂÷r²

where G is gravitational constant, whose value is 6.6743 × 10⁻¹¹ m³ kg-1s⁻².

Force is expressed in Newton N in SI unit. its dimensions are [M¹L¹T⁻²].

As distance decreases the Force increases

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When you mix 100 pounds of soil with 100 pounds of KCl, the resulting soil would have a pH near 7.0.

This is because KCl is a neutral salt and does not affect the pH of the soil. The modest CEC of the soil means that it has a relatively low capacity to retain positively charged ions such as K+. Therefore, adding KCl would not significantly affect the pH of the soil. The resulting soil would have a similar pH to the original soil, but it may have a slightly higher pH due to the dilution effect of adding more material. However, the pH increase would be minimal and would not make the soil moderately alkaline (pH 7.5 to 8.5) or calcareous.

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Answer:

M0 = M1 + E

or E = M0 - M1

The difference between energy of the parent nucleus and the daughter nucleus (or nuclei) depends on the mass difference according the relation

E = M C^2

where E is the energy released when some of the original mass present is lost in the reaction

(your question does not show the graphical information)

The equation =c/f relates wavelength and frequency. There is an inverse relationship between wavelength and frequency.

One crucial equation connects them all: The speed of light is equal to the frequency times the wavelength of any electromagnetic wave. If we know the other measurement, we can use this connection to calculate the wavelength and frequency of the any electromagnetic wave.

The distance between the crests of two waves is known as the wavelength, which also applies to troughs. The number of vibrations that pass across a certain area in a second is the frequency, which is expressed in seconds per cycle (Hz) (Hertz). This article discusses how wavelength and frequency relate to one another.

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Explanation:

electricity is the flow of electrical power or charge

Explanation:

the flow of current is called electricity

The gas temperature change if the volume is halved and the pressure is tripled by factor 6.

An ideal gas is theoretical gas composed of many randomly moving point particles that are not subject to interparticle interactions. The ideal gas concept is useful because it obeys ideal gas law, a simplified equation of state, and is amenable to analysis under statistical mechanics.

Considering combined law equation:

Temperature increases by factor of 6.

Gay-Lussac's Law

Gay-Lussac's Law indicates that, as long as volume of the container containing the gas is constant, as the temperature increases, the gas molecules move faster. Then number of shocks against the walls increases, that is, the pressure increases. That is, gas pressure is directly proportional to its temperature.

In summary, when there is constant volume, as the temperature increases, the gas pressure increases. And when temperature decreases, gas pressure decreases.

Gay-Lussac's law can be expressed as mathematically as follows:

where:

P= pressure

T= temperature

k= Constant

Boyle's Law

Pressure and volume are related by Boyle's law, which says that volume occupied by a given mass of gas at constant temperature is inversely proportional to pressure.

Boyle's law is expressed mathematically as follows:

P× V=k

where:

P= pressure

V= volume

k= Constant

Charles's Law

Finally, Charles's Law consists of the relationship that exists between the volume and the temperature of certain amount of ideal gas, which is maintained at a constant pressure.

This law says that for given sum of gas at constant pressure, as the temperature increases, the volume of the gas increases and as the temperature decreases, the volume of the gas decreases. That is, volume is directly proportional to the temperature of the gas.

In summary, Charles' law is a law that says that when amount of gas and pressure are kept constant, the ratio between volume and temperature will always have the same value:

where:

V= volume

T= temperature

k= Constant

Combined law equation

Combined law equation is combination of three gas laws called Boyle's, Charlie's and Gay-Lussac's law:

Studying the two different states, an initial state 1 and an final state 2, the following will be true:

In this case, you know that:

Volume is double: V2= 2×V1

Pressure is tripled: P2= 3×P1

So, replacing in combined law equation:

Solving:

T2= 6×T1

Finally, temperature increases by a factor of 6.

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Answer:

Work, in physics, measure of energy transfer that occurs when an object is moved over a distance by an external force at least part of which is applied in the direction of the displacement.To express this concept mathematically, the work W is equal to the force f times the distance d, or W = fd.

Explanation:

In first case, the forces on LHS and on RHS is the same i.e. 3 N. The force acting on the car is balanced force. As a result, the car will not move at all.

In second case,

Force on RHS = 2000 N

Force on LHS = -6000 N

Net force acting on it is given by :

F = 2000+(-6000)

= -4000 N

Hence, this is the required solution.

Answer:

t = 1.24 seconds

Explanation:

Given that,

Velocity of the ball, u = 30 m/s

Height, h = 45 m

We need to find how much time will it take the ball to reach a height of 45 m. Let the time be t.

Using the second equation of motion to find it.

\(h=ut+\dfrac{1}{2}at^2\\\\45=30t+\dfrac{1}{2}\times 9.8\times t^2\\\\45=30t+4.9t^2\\\\30t+4.9t^2-45=0\\\\t=1.24\ s\ \text{and}\ -7.36\ s\)

Neglecting negative value,

The ball will reach to a height of 45 m in 1.24 seconds.

Answer:

1. The wave created is a transversal wave because the medium goes up and down. (I used what someone put in the comments because it's correct.)

2. 20 Meters

3. 60 Hz (Hertz)

4. 1200m/s

Explanation:

Not sure if all of this is correct, but I did this assignment so..

Please mark me brainliest. I answered all questions.

Energy refers to the ability or capacity to do work. Energy can be of various types as follows:

Kinetic energy is energy possessed by an object because of its motion while potential energy is energy possessed by an object because of its position or its condition.

The law of conservation of energy states that energy cannot be created nor destroyed but can only be transformed i.e. converted from one form to another.

Friction is a force that resists the relative motion or tendency to such motion of two bodies in contact.

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Answer: 3- Large cells of rising and sinking gasses

Explanation: Hotter gas coming from the radiative zone expands and rises through the convective zone. It can do this because the convective zone is cooler than the radiative zone and therefore less dense. As the gas rises, it cools and begins to sink again. As it falls down to the top of the radiative zone, it heats up and starts to rise. This process repeats, creating convection currents and the visual effect of boiling on the Sun's surface.

Answer:

A

Explanation:

since its the tip, you will feel it the most there.

Answer:

DDDDDDDDDDDDDDDDDDDDDDDDDDD

The following are some examples of unplanned downtime: Power interruptions, Tornado and Failure of the network

Unplanned downtime refers to a circumstance in which a piece of equipment or a system fails, resulting in unanticipated interruptions in the production or delivery of a service. It is possible for this to lead to a decline in productivity as well as a loss of income from unhappy customers. Power outages, broken equipment, natural disasters, and malfunctioning networks are some of the most common factors that lead to unplanned downtime.

Facilities that rely on electricity to function, such as data centres, industries, and hospitals, are susceptible to experiencing downtime as a result of power outages. Natural disasters such as tornadoes, hurricanes, earthquakes, and others can also result in downtime for businesses since they damage equipment and infrastructure. Failures in a network can impede communication and the transmission of data, which can result in downtime for information technology systems and online services.

Organisations should undertake preventative maintenance programmes, invest in backup systems and redundancies, and test their disaster recovery plans on a regular basis to reduce the likelihood of experiencing unplanned downtime. In addition, organisations can utilise predictive analytics and machine learning to identify possible issues before they occur and take preventative measures to reduce downtime. This can help businesses avoid costly and disruptive downtime. If organisations follow these procedures, they will be able to lessen the detrimental effects of unplanned downtime and preserve the continuity of their operations.

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The speed of the fluid near the right-hand end of the tube is approximately 10.06 m/s.

Bernoulli's equation is a fundamental principle in fluid mechanics that relates the pressure, velocity, and height of a fluid in a flow. It states that for an incompressible fluid flowing in a steady state through a pipe of varying cross-sectional area, the total energy of the fluid (consisting of pressure energy, kinetic energy, and potential energy) remains constant along any streamline of the flow. Mathematically, the equation is:

P + (1/2)ρv² + ρgh = constant

To find the speed of the fluid near the right-hand end of the tube, we can use the Bernoulli's equation, which relates the pressure and velocity of a fluid in a flow:

P₁ + (1/2)ρv₁² = P₂ + (1/2)ρv₂²

where P1 and v1 are the pressure and velocity of the fluid at the left hand end of the tube (where the pipe is wider), and P2 and v2 are the pressure and velocity at the right-hand end (where the pipe is narrower).

We can redo this equation to solve for v₂:

v₂ = sqrt(2*(P₁-P₂)/ρ + v₁²)

where sqrt denotes the square root.

Using the given values:

A₂/A₁ = 0.46

dP = 27.6 Pa

ρ = 2.93 kg/m³

We can find the pressure at the left hand end using the fact that the pressure is the same at the same height, and the fluid is incompressible, so its density is constant:

P₁ = P₂ + dP = P₂ + 27.6 Pa

The area ratio gives us:

A₂ = 0.46*A₁

Now we need to find v₁. We can use the continuity equation, which states that the mass flow rate (ρAv) is constant in an incompressible fluid:

ρ₁A₁v₁ = ρ₂A₂v₂

where ρ1 is the density of the fluid at the left hand end, which is the same as ρ₂, and A₁ and A₂ are the pipe's cross-sectional areas at the left and right ends, respectively.

Substituting A₂ = 0.46 × A₁ and simplifying, we get:

v₁ = (0.46)² × v₂

Substituting this into the Bernoulli's equation, we get:

P₁ + (1/2)ρv₁² = P₂ + (1/2)ρv₂²

Substituting P₁ = P₂ + 27.6 Pa and v₁ = (0.46)² × v₂, and solving for v₂, we get:

v₂ = √((227.6)/(0.46^2ρ) + (0.46)⁴ × v₂²/ρ)

Simplifying this equation, we get:

v₂= √((227.6)/(0.46^2ρ × (1-0.46⁴)))

Substituting the given values, we get:

v₂ = √((227.6)/(0.46²²°⁹³ × (1-0.46⁴))) = 10.06m/s

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The velocity of the arrow after two seconds on the moon is 51.68 m/s.

The given expression for height as a function of time t, H = 55t - 0.83t^(2). We need to find the velocity of the arrow after two seconds. To find velocity, we have to differentiate H with respect to time.

So, we have: dh/dt = 55 - 1.66t.

The velocity of the arrow after two seconds can be found by substituting t = 2 in the above expression. Therefore, we have:

dh/dt = 55 - 1.66

t= 55 - 1.66(2)

= 55 - 3.32

= 51.68.

Therefore, the velocity of the arrow after two seconds is 51.68 m/s.

Explanation: The given expression for height as a function of time t, H = 55t - 0.83t^(2). We need to find the velocity of the arrow after two seconds. To find velocity, we have to differentiate H with respect to time.

So, we have:

dh/dt = 55 - 1.66t.

The velocity of the arrow after two seconds can be found by substituting t = 2 in the above expression. Therefore, we have: dh/dt = 55 - 1.66t

= 55 - 1.66(2)

= 55 - 3.32

= 51.68.  

Hence, the velocity of the arrow after two seconds is 51.68 m/s.

Conclusion: The velocity of the arrow after two seconds on the moon is 51.68 m/s.

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Answer:

I believe the answer is 2.0

Explanation:

The net force that would be required is 2 N

From the question,

We have that

A net force of 10 N accelerates an object at 5.0 m/s².

To determine the net force that would be required to accelerate the same object at 1.0 m/s²,

First, we will determine the mass of the object

From the Newton's second law of motion, we have that

F = ma

Where F is the force

m is mass

and a is acceleration

From the given information

F = 10N

a = 5.0 m/s²

Putting the above parameters into the formula, we get'

10 = m × 5.0

∴ m = 10 ÷ 5.0

m = 2 kg

∴ The mass of the object is 2kg

Now,

For the net force that would be required to accelerate the same object at 1.0 m/s²,

Using the same formula

F= ma

Here,

a = 1.0 m/s²

and m = 2 kg

∴ F = 2 × 1

F = 2 N

Hence, the net force that would be required is 2 N

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Answer:

Explanation:

Let lift force F be created by propellers at angle of Ф with the horizontal .

The vertical component of this force will balance the weight of helicopter and horizontal component will balance the air resistance .

F sinФ = mg = 2750 x 9.8 = 26950 N

F cosФ = 7510 N

Squaring and adding ,

F² = 26950² + 7510²

= 726302500 + 56400100

= 782702600

F = 27976.82 N .

Answer:

to heat spaces in buildingss

Explanation:

The speed of the other object formed is 4.8 m/s.

The change in kinetic energy is 9.84 J.

Mass of the first object, m₁ = 3 u

Velocity of the first object, v₁ = 0.8 c

Mass of the second object, m₂ = 4 u

Velocity of the second object, v₂ = 0.6 c

Mass of the object at rest, m' = 6 u

a) According to the conservation of momentum,

m₁ + m₂ = m'+ m

So, m = (3 + 4) - 6

m = 7 - 6 = 1 u

m₁v₁ + m₂v₂ = (m x v) + (m' x v')

(3 x 0.8) + (4 x 0.6) + (1 x v) + (6 x 0)

Therefore, the speed of the other object formed is,

v = 2.4 + 2.4

v = 4.8 m/s

b) The change in kinetic energy is given by,

E = KE - (KE₁ + KE₂)

E = 1/2mv² - (1/2m₁v₁² + 1/2m₂v₂²)

E = 1/2(mv² - m₁v₁² - m₂v₂²)

E = 1/2[(1 x (4.8)² - 3 x (0.8)² - 4 x (0.6)²]

E = 1/2(23.04 - 1.92 - 1.44)

E = 1/2 x 19.68

E = 9.84 J

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Humans convert approximately 40% of the energy stored in food to useful work

Humans can store about 40% of the energy from the food consumed due to the conversion of energy from food through the metabolic process (metabolism).

The other 60% of the energy it is used to maintain the normal function of the body and the other activities that involve physical and mental activities

The energy storage is a reserve of energy that we can use in really difficult situation when the body is with no energy.

The processes of a chemical or physical nature by which the human body converts or uses energy.

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Answer:

3 N

Explanation:

From the question given above, the following data were obtained:

Mass of block = 100 Kg

Net force = 3 N

From the question given above, we were told that the net force acting on the block is 3 N.

Thus, 3 N remains the net force acting on the block.