A 2.0 kg brick has the dimensions 7.5 cm x 15 cm x 30cm. find the pressures exerted by the brick on a table when it is resting on its various faces.

Answer:

D

Explanation:

LA FUERZA NETA ES LA FUERZA TOTAL DE EMPUJE MENOS EL PESO DEL

COHETE.

\(F_{y}\) = 700000 N(sen 90° - 20°) - 560000 N = 97785 N

The approximate vertical component of the net force that is propelling the rocket away from Earth is 112,000 N. Option B is correct.

The net force acting on the rocket is the sum of the thrust force and the weight of the rocket. The thrust force is pointing upwards at an angle of 20 degrees, and the weight of the rocket is pointing downwards. The thrust force is the force that is generated by the rocket engine. It is the force that propels the rocket upwards.

The weight of the rocket is the force of gravity acting on the rocket. It is the force that pulls the rocket downwards. The net force acting on the rocket is the sum of the thrust force and the weight of the rocket. If the net force is positive, the rocket will accelerate upwards. If the net force is negative, the rocket will accelerate downwards. If the net force is zero, the rocket will remain at rest.

net force = thrust force + weight

vertical component of net force = thrust force * cos(angle)

vertical component of net force = 700,000 N * cos(20 degrees) = 112,000 N. Option B is correct.

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The required total flux through the curved side of the cylinder is calculated to be Q/√2∈₀.

On the cylinder's axis, there is a point charge Q.

Length of the cylinder is L.

The cylinder's length is equal to its diameter.

The diagram follows as,

R is the radius of the cylinder.

The cone OABCO forms the following solid angle at O:

dΩ = 2 π (1 - cos θ)

Ф = Q/4π∈₀ dΩ

Ф = Q/4π∈₀ [2π (1 - cos θ)]

Ф = Q/4π∈₀ [2π (1 - cos 45°)]

Ф = Q/2∈₀ (1 - 1/√2)  

where,

∈₀ is permittivity

Due to symmetry, the electric flux for the left surface would be the same.

Consequently, the circular surfaces' electric flux is,

Ф' = 2 Ф = 2 × Q/2∈₀ [1 - 1/√2] = Q/∈₀ [1 - 1/√2]

Gauss law now yields the following total electric flux through the cylinder:

Ф total = Q/∈₀

The total flux through the cylinder is made up of the flux through the two circular surfaces and the curved surface because the cylinder has a curved surface as well as two circular surfaces.

Let Фc be the flux through the curved surface.

Thus we have,  

Ф total = Фc + Ф'

Putting in the values,

Q/∈₀ = Фc + Q/∈₀ [1 - 1/√2]  

Фc = Q/√2∈₀

Thus, the flux through the curved side is Q/√2∈₀.

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According to Heisenberg's Uncertainty Principle, it is impossible to determine the position and momentum of a particle with absolute certainty at the same time. The Uncertainty Principle is defined as Δx * Δp ≥ h/4π, where Δx is the uncertainty in position, Δp is the uncertainty in momentum, and h is Planck's constant.
For the given problem, the uncertainty in position of a proton with mass 1.673 x 10-27 kg and kinetic energy 1.2 keV can be calculated as follows:

We know that the momentum p of a particle is given by p = mv, where m is the mass of the particle and v is its velocity.
The kinetic energy of the proton can be converted to momentum using the equation E = p²/2m, where E is the kinetic energy.
1.2 keV = (p²/2m)    (1 eV = 1.6 x 10^-19 J)
p²/2m = 1.92 x 10^-16 J
The momentum p of the proton can be calculated by taking the square root of both sides:
p = √(2mE) = √(2 x 1.673 x 10^-27 x 1.6 x 10^-16) = 7.84 x 10^-22 kg m/s

Using Heisenberg's Uncertainty Principle, we can calculate the uncertainty in position as follows:
Δx * Δp ≥ h/4π
Δx ≥ h/4πΔp
Substituting the values of h, Δp, and solving for Δx:
Δx ≥ (6.626 x 10^-34)/(4π x 7.84 x 10^-22)
Δx ≥ 2.69 x 10^-12 m

Therefore, the uncertainty in position of the proton is 2.69 x 10^-12 m.

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The specific gravity of the mixture is 0.867.

To find the specific gravity of the mixture, we need to calculate the ratio of the density of the mixture to the density of water.

The specific gravity is defined as the ratio of the density of a substance to the density of water. In this case, we can find the specific gravity of the mixture by calculating the ratio of the density of the mixture to the density of water.

The density of the mixture can be calculated by adding the densities of the antifreeze solution and water in the given proportions.

Let's start by calculating the density of the antifreeze solution. The specific gravity is given as 0.80, which means that the density of the antifreeze solution is 0.80 times the density of water.

Density of antifreeze solution = 0.80 * Density of water

Next, we can calculate the density of the mixture by adding the densities of the antifreeze solution and water in the given proportions.

Density of mixture = (Volume of antifreeze solution * Density of antifreeze solution + Volume of water * Density of water) / Total volume of mixture

Volume of antifreeze solution = 5.0 L

Volume of water = 2.5 L

Total volume of mixture = 7.5 L

Now, let's substitute the values into the equation:

Density of mixture = (5.0 L * Density of antifreeze solution + 2.5 L * Density of water) / 7.5 L

Since we already know that the density of the antifreeze solution is 0.80 times the density of water, we can substitute this value into the equation:

Density of mixture = (5.0 L * 0.80 * Density of water + 2.5 L * Density of water) / 7.5 L

Now, let's simplify the equation:

Density of mixture = (4.0 * Density of water + 2.5 * Density of water) / 7.5

Density of mixture = (6.5 * Density of water) / 7.5

Finally, we can find the specific gravity of the mixture by calculating the ratio of the density of the mixture to the density of water:

Specific gravity of mixture = Density of mixture / Density of water

Substituting the equation for density of mixture:

Specific gravity of mixture = ((6.5 * Density of water) / 7.5) / Density of water

Simplifying the equation:

Specific gravity of mixture = 6.5 / 7.5

Specific gravity of mixture = 0.867 (rounded to three decimal places)

The specific gravity of the mixture is 0.867.

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There are several barriers that prevent energy efficiency from reaching its full potential. These barriers include upfront costs, lack of information and awareness, split incentives, market failures, and policy and regulatory challenges.

1. Upfront Costs: Investing in energy-efficient technologies and systems often requires a significant upfront investment. Many individuals and businesses may be hesitant to incur these costs, especially if they have limited financial resources or short-term perspectives.

2. Lack of Information and Awareness: Limited knowledge about energy-efficient practices and technologies can hinder adoption. People may not be aware of the potential energy savings or the available options to improve efficiency.

3. Split Incentives: In situations where landlords own the buildings but tenants pay the energy bills, there is a split incentive problem. Landlords may have little motivation to invest in energy efficiency measures since they don't directly benefit from the reduced energy costs.

4. Market Failures: Market failures, such as information asymmetry and externalities, can impede energy efficiency. For example, consumers may not have access to accurate information about the energy efficiency of products or may not consider the long-term cost savings.

5. Policy and Regulatory Challenges: Inconsistent or inadequate policies and regulations can hinder energy efficiency efforts. Insufficient incentives, lack of enforcement, and complicated procedures for accessing incentives or grants can discourage investment in energy efficiency.

Overcoming these barriers requires a multi-faceted approach involving public awareness campaigns, financial incentives, targeted policies, and streamlined regulations. Governments, businesses, and individuals need to collaborate to address these barriers and unlock the full potential of energy efficiency, leading to significant energy savings and environmental benefits.

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Answer:

lines?

Explanation:

When cross-checking a certificate of insurance, there are several essential things to consider: Verify if subcontractor insurance is primary to yours, Review the material change endorsement procedure, Check the additional insured status.

a) Verify if subcontractor insurance is primary to yours: This is important to ensure that in the event of a claim or loss, the subcontractor's insurance coverage takes precedence over your own. Confirm that the certificate clearly states that the subcontractor's insurance is primary and not just excess or secondary to your coverage.

b) Review the material change endorsement procedure: Understand the process for updating the certificate of insurance if there are any material changes to the coverage, such as modifications in policy limits, policy cancellations, or changes in coverage terms. Make sure the procedure aligns with your requirements and that you are promptly notified of any modifications.

c) Check the additional insured status: Determine if your business is listed as an additional insured on the certificate. This provides you with coverage under the subcontractor's insurance policy for certain liabilities arising from their work. Confirm that the certificate clearly identifies your business as an additional insured and specifies the scope of coverage.

Additionally, it's crucial to verify that the certificate of insurance is up to date, with accurate policy information, valid dates of coverage, and adequate policy limits for the required coverage types. Ensure the insurance provider's name, contact details, and policy numbers are correct.

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A. Assume incompressible flow

Since volumtric flow rate will be same in both section

Q1 = Q2

A1*V1 = A2*V2

V2 = A1*V1/A2

V2 = 6.9*10^-4*288*10^-2/(3.3*10^-4)

V2 = 6.02 m/sec

B. using bernoulli's equation:

P1/rho + v1^2/2 + g*h1 = P2/rho + v2^2/2 + g*h2

Since pipes are horizontal

h1 = h2

P1/rho + v1^2/2 = P2/rho + v2^2/2

P2 = P1 + (v1^2 - v2^2)*rho/2

P2 = 1.5*10^5 + (2.88^2 - 6.02^2)*1100/2

P2 = 1.35*10^5 Pa

The rate of change in position of an object in any course. Speed is measured because the ratio of distance to the time wherein the distance became included. Speed is a scalar amount because it has handiest route and no significance.

Velocity can be notion of as the rate at which an object covers distance. A quick-moving object has a high speed and covers a notably big distance in a given amount of time, whilst a sluggish-shifting item covers a relatively small amount of distance in the same amount of time.

The primary unit or the S.I. unit of velocity is m/s or ms?¹.

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Answer:

D) it is one of many galaxies

Explanation:

the milky-way galaxy is just one of billions of galaxies, which span billions and billions of light-years across the universe!!!

Answer:

D it is one of many

Explanation:

Answer:

it is being accountable basically like some one can relive and trust that you'll do what you say your going to do

Answer:

Human activities and natural processes have influenced the change in the global temperature by the following processes

1) Green house gas such as carbon dioxide, methane, ozone, nitrous oxide and fluorinated gases produced by the combustion of fossil fuels the use of  industrial chemicals, the production of coal, and natural gas

2) Deforestation which reduces the natural process of conversion of carbon dioxide to oxygen, thereby, increasing the greenhouse gases in the atmosphere

3) The accumulation of the greenhouse gases in the atmosphere results in the trapping of heat in the atmosphere, causing the atmospheric temperature to rise

4) Changes in the amount of energy produced by the Sun can result in an increase or decrease in the atmospheric temperature

5) Volcanic activity that occurs at a sufficiently large scale can produce sulfur dioxide that blocks the rays of the Sun from reaching the Earth, resulting in a change of atmospheric temperature.

Explanation:

Answer:

Green house gas such as carbon dioxide, methane, ozone, nitrous oxide and fluorinated gases produced by the combustion of fossil fuels the use of  industrial chemicals, the production of coal, and natural gas

Explanation:

Sporozoa are non-motile organisms, that is they aur uncapable of motion and thus rely on their host organisms to move.

Sporozoa is a phylum of unicellular parasitic organisms, and they do not possess any motile structures such as flagella, pseudopodia or cilia. Instead, they rely on their host organisms to provide a means of transportation. Sporozoans are known for their complex life cycles, which involve multiple hosts and various developmental stages. They are mostly found in the phylum Apicomplexa, which includes several pathogenic organisms such as Plasmodium, which causes malaria in humans. Despite their lack of motility, sporozoa are still able to invade host cells and tissues through specialized structures known as apical complexes.

In conclusion, sporozoa are non-motile organisms that rely on their host organisms to move. While they lack traditional motile structures, they are still able to invade and cause diseases in their hosts through specialized mechanisms. Understanding the biology and behavior of these parasites is crucial in developing effective treatments and preventive measures against the diseases they cause.

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Petroleum is a non-renewable resource, which means that it cannot be replenished. Because of this, its usage needs to be planned properly to make sure that there is sufficient availability for present and future needs

The optimal level of use of petroleum can be achieved by several ways which are listed below:

1. Reduce wastage: The optimal level of petroleum use can be achieved by reducing wastage. We should aim to use petroleum products efficiently to minimize wastage and ensure that the resource is not used up too quickly.

2. Develop alternative energy sources: Another way to achieve the optimal level of petroleum use is to develop alternative energy sources. Renewable energy sources like solar, wind, and hydro can be developed to supplement petroleum.

3. Increase efficiency: The third way to achieve the optimal level of petroleum use is to increase efficiency. We can achieve this by improving the efficiency of vehicles and machinery that consume petroleum products.

4. Conservation: Conservation can also help achieve the optimal level of petroleum use. We can conserve petroleum by using it judiciously and avoiding unnecessary use. We can also reduce our reliance on petroleum products by using alternatives like public transport or bicycles.

5. Develop sustainable transportation: Developing sustainable transportation can also help achieve the optimal level of petroleum use. We can develop transportation systems that are more efficient, rely on alternative energy sources, and reduce the amount of petroleum consumed.

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In 4.5 billion years, the amount of mass lost is 1.41912 * 10¹⁷ kg.

An equation is an expression used to show the relationship between two or more variables and numbers.

Given that:

Io loses about a ton (1000 kilograms) of sulfur dioxide per second to Jupiter's magnetosphere.

In 4.5 billion years, amount of mass lost = 1000 kg/s * (4.5 * 10⁹ * 365 * 60 60 * 24) = 1.41912 * 10¹⁷ kg.

In 4.5 billion years, the amount of mass lost is 1.41912 * 10¹⁷ kg.

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Answer:

1.Tackle

2.helmet

3.touchdown

4.quarterback

5.interference

6.touchback

7.safety

8.cornerback

9.handoff

10.lateral

11. reciever

12.completion

13.interception

14.center

15.referee

16.huddle

17.overtime

18. facemask

19.pigskin

20.penalty

Explanation:

The correct words are "Tackle, Theme, Touchdown, Quarterback, Interference, Touchdown, Safety, Cornerback, Offhand, Aerial, Receiver, Completion, Receptionist, Center, Referee Huddle, Overtime, Safesmack, Kicking, and  Penalty."

A football word scramble is a game where a series of letters are provided in a scrambled order, and the goal is to rearrange those letters to form words related to football. Players need to unscramble the letters to identify the correct football-related terms, such as positions, equipment, or actions in the game. It is a fun and engaging activity that challenges players' knowledge and word-solving skills while connecting to the theme of football.

1. Tackle

2. Theme

3. Touchdown

4. Quarterback

5. Interference

6. Touchdown

7. Safety

8. Cornerback

9. Offhand

10. Aerial

11. Receiver

12. Completion

13. Receptionist

14. Center

15. Referee

16. Huddle

17. Overtime

18. Safesmack

19. Kicking

20. Penalty

Therefore, The correct answers are "Tackle, Theme, Touchdown, Quarterback, Interference, Touchdown, Safety, Cornerback, Offhand, Aerial, Receiver, Completion, Receptionist, Center, Referee, Huddle, Overtime, Safesmack, Kicking, and  Penalty."

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Answer:

For me it would be what if i die

Explanation:

The flaw in the experiment on water recycling is that the student did not see water dripping off the glass plate as expected. To correct this flaw, the student should use a cold glass plate instead of a hot glass plate.

The correct option to the given question is option 4.

When the student holds the hot glass plate above the beaker, the water vapor in the atmosphere will come into contact with the cold surface of the plate and condense, forming water droplets. However, if the glass plate is already hot, it will not be able to cool down the water vapor quickly enough for condensation to occur.

By using a cold glass plate, the temperature difference between the plate and the water vapor will be greater, allowing for faster condensation. This will result in water droplets forming on the glass plate and dripping off, demonstrating the process of water recycling through the atmosphere.

Therefore, the correct method to correct the flaw in this experiment is to use a cold glass plate instead of a hot glass plate. This will enable the student to observe water droplets on the glass plate as expected.

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Answer:

Explanation:

A)3
B)4
C)1
D)2
E)5

Explanation:

m1u1+m2u2=m1v1+m2v2

(3000×15)+(2200×-10)=(3000×v)+(2200×v)

45000-22000=5200v

23000=5200v

v=230/52

v=4.423m/s to the east.

Answer:

Mechanical Sound Waves - A sound wave moves through air by displacing air particles in a chain reaction. ... Sound energy, or energy associated with the vibrations created by a vibrating source, requires a medium to travel, which makes sound energy a mechanical wave. For pitch the higher the frequency, the higher the pitch. Frequency is measured in hertz, or cycles per second. Frequency also affects loudness, with higher-pitched sounds being perceived as louder. Amplitude and frequency of sound waves interact to produce the experiences of loudness and pitch.

To convince ourselves that Gauss's law is correct starting from Coulomb's law, we need to consider an arbitrary Gaussian surface and examine both cases when the charge is inside and outside the Gaussian surface. Let's break down the steps:

1. Coulomb's law states that the electric field due to a point charge Q at a distance r from the charge is given by:

  E = k * Q / r²

  where k is the Coulomb constant.

2. Gauss's law, on the other hand, relates the electric flux through a closed surface to the total charge enclosed within that surface. Mathematically, Gauss's law is expressed as:

  Φ = Q_in / ε₀

  where Φ is the electric flux through the Gaussian surface, Q_in is the total charge enclosed by the Gaussian surface, and ε₀ is the permittivity of free space.

3. Consider the case where the charge Q is inside the Gaussian surface. By applying Coulomb's law, we can calculate the electric field at each point on the Gaussian surface due to the charge Q. Then, we can calculate the electric flux Φ by integrating the dot product of the electric field and the surface area vector over the entire Gaussian surface.

4. On the other hand, if the charge Q is outside the Gaussian surface, the electric field at each point on the Gaussian surface due to Q is still given by Coulomb's law. However, since the charge Q is outside the Gaussian surface, the total charge enclosed by the Gaussian surface, Q_in, is zero. Therefore, according to Gauss's law, the electric flux through the Gaussian surface is also zero.

By considering these two cases, we see that Gauss's law is consistent with Coulomb's law. When the charge is inside the Gaussian surface, the electric flux through the surface is directly proportional to the enclosed charge. When the charge is outside the Gaussian surface, the electric flux through the surface is zero, indicating that the net electric field passing through the closed surface is also zero.

By considering an arbitrary Gaussian surface and examining both cases of the charge being inside and outside the surface, we can see that Gauss's law is consistent with Coulomb's law, providing further confidence in the validity of Gauss's law.

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Answer:

falling 49m a second

Explanation:

The first-order maxima correspond to m = 1, angle can be found using tanθ = opposite/adjacent. Therefore, θ = tan^-1(1.3/12) = 6.23 degrees. The wavelength of the 9.0 kHz sound wave can be found using equation λ = v/f, where v is the speed of sound (340 m/s) and f is frequency (9.0 kHz = 9000 Hz). Therefore, λ = 0.038 m.

Substituting values: dsin6.23° = 1(0.038 m). d = 0.38 mm. A diffraction grating for sound can be created using a large board of sound-absorbing material with several parallel slits. In problem, spacing was found to be 0.38 mm for a grating produced "loud spots" 1.3 m away from center when 9.0 kHz sound waves were passed through it.

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Answer:

m = 15, P = .25, x = .15

F = -K x for spring

ω = (K/m)^1/2

ω^2 = K / m

K = m ω^2 = m (2 π f)^2 = m 4 π^2 / P^2

K = 4  π^2 m / P^2

F = K x = x * 4  π^2 m / P^2

F = .15 * 4 * π^2 * 15 / .25^2

F = 1420 N

Hence, using Newton's second rule, which specifies that f minus m g = m a so, we can represent force as 128 points, which is m multiplied by a plus g. Hence the acceleration is 0.824 and the g is 9.8.

Fertilizer is available in three sizes: small bags, large bags, and bulk. Each has its own set of threats. Because these bags weigh 50kg and the HSA manual lifting guidelines are 25kg for males and 16kg for women, they should be lifted by two individuals.

Calcium Ammonium Nitrate (CAN) is a high-efficiency compound field fertiliser that contains Nitrogen as well as quick-acting Calcium.

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Answer :

The earth wire is a safety device that is attached to the appliance's casing. If the live wire falls loose and hits the casing, the earth wire offers a conduit for the electrical current to pass. The high current flowing through the ground line melts the fuse, turning off the device. If there is no earth wire, we will be the least resistance path for the current to ground in the event of a fault (shock), as there is no other way for the fault current to dissipate. In the event that there is an earth wire. Because the earth line is the least resistance path to the ground, we will be unaffected.

Explanation :

Have a great day! <3

When an average force of 4800 n acts on a golf ball for a time interval of 0.006 s then the magnitude of the impulse acting on the golf ball is 28.8 Ns.

Impulse is the change in momentum of an object that occurs when a force is applied to it over a certain period. It is defined as the product of the force applied and the time interval during which it acts.

The impulse (J) can be calculated using the formula:

J = FΔt

where F is the average force acting on the object, and Δt is the time interval during which the force acts.

In this case, the average force acting on the golf ball is 4800 N, and the time interval during which the force acts is 0.006 s. Therefore, the impulse acting on the golf ball is:

J = FΔt = 4800 N x 0.006 s = 28.8 Ns

The magnitude of the impulse acting on the golf ball is 28.8 Ns.

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ANSWERS

a. 635.26 Hz

b. 673.23 Hz

c. 597.87 Hz

d. 562.14 Hz

EXPLANATION

a. In this case, the source is the train moving toward the station. The frequency of the source, fs = 616 Hz, the velocity of the source is vs = 10.4 m/s. The "observer" is the people in the station and we can assume that they are at rest, so the velocity of the observer, vo, is 0 m/s.

We have to find what is the frequency that the observer gets,

In this formula, v represents the velocity of sound, v = 343 m/s.

The frequency heard by the observer is,

Hence, a frequency of 635.26 Hz is heard at the station.

b. This is a different case because the observer is now another train, moving toward the station in the opposite direction - which means that the observer is moving toward the source, and it does it at 20.5 m/s. We also have to find the frequency heard by the observer,

Replace with the known values: v = 343 m/s, vo = 20.5 m/s, vs = 10.4 m/s, fs = 616 Hz,

Hence, the other train hears a frequency of 673.23 Hz

c. Now the velocity and frequency of the source are the same, but instead of moving toward the observer, it is moving away from it. The equation changes to,

Hence, the frequency heard at the station will be 597.87 Hz.

d. Again, this case is similar to part b, but in this case, the source and the observer are both moving away from each other, so the equation changes to,

Hence, the other train will hear a frequency of 562.14 Hz.

Answer:

Option (C)

Explanation: According to the law of Uniformitarianism, the geological processes that is going on now, has undergone in the past and will be continued in the same way in the future too.

Due to this constant ongoing earth dynamic processes, in terms of millions of years, the previously exited landforms have undergone weathering and erosion, and subsequently deposition also has taken place, and gave the shape of the present existing landforms. These processes has occurred slowly and will be continued in the same way in the future also.

Thus, the correct answer is option (C).