NEED HELP ASAP
what is the maximum height achieved by a track star who goes into a long jump at 12m/s at an angle of 20.0 about the horizontal? (hint 12m/s is not the horizontal component of the velocity vector.)

To solve this problem, we need to apply the principle of conservation of momentum, which states that the total momentum of a system remains constant if there is no external force acting on it.

The initial momentum of the loaded car moving north is:

p1 = m1 * v1 = 134,000 kg * 2.9 m/s = 388,600 kg*m/s (north)

The initial momentum of the unloaded car moving south is:

p2 = m2 * v2 = 22,600 kg * (-0.8 m/s) = -18,080 kg*m/s (south)

Note that we have used a negative velocity for the unloaded car, as it is moving in the opposite direction to the positive direction we have chosen (north).

When the cars collide, they lock together and move as a single unit. The final momentum of the joined cars is:

p = (m1 + m2) * v

where v is the final velocity of the joined cars.

Since the momentum is conserved, we can set the initial and final momenta equal:

p1 + p2 = (m1 + m2) * v

Substituting the values we have calculated:

388,600 kgm/s - 18,080 kgm/s = (134,000 kg + 22,600 kg) * v

370,520 kg*m/s = 156,600 kg * v

v = 2.366 m/s (north)

Therefore, the velocity of the cars after they join together is 2.4m/s north.

Note that this answer is between the initial velocities of the two cars, which makes sense since the collision causes the cars to slow down and move together in the north direction.

Answer:

There are several basic ways to reduce sound: increasing the distance between source and receiver, decoupling, using noise barriers to reflect or absorb the energy of the sound waves, using damping structures such as sound baffles for absorption, or using active antinoise sound generators.

Answer:

The work done can be calculated using the formula:

work = force × distance × cos(theta)

where force is in newtons, distance is in meters, and theta is the angle between the force and the displacement. Assuming that the force is applied vertically upwards and the displacement is also vertically upwards:

work = 45 N × 3 m × cos(0°)

= 135 J

Therefore, the work being put out by Brandon is 135 joules.

Explanation:

The new speed of the 5kg cart after the collision is 3.6 m/s to the right.

Product of mass with the velocity of an object is referred to as momentum.

As we know that :m1v1i + m2v2i=m1v1f + m2v2f

m1 and m2 are masses of the carts, v1i and v2i are initial velocities of the carts, and v1f and v2f are final velocities of the carts.

m1v1i + m2v2i = (m1 + m2)vf

(5 kg)(10 m/s) + (8 kg)(0 m/s) = (5 kg + 8 kg)(vf)

50 kgm/s = 13 kgvf

vf = 50 kg*m/s / 13 kg

vf = 3.846 m/s

So the final velocity of the combined carts after the collision is 3.846 m/s to the right.

m1v1i + m2v2i = m1v1f + m2v2f

v1i is the initial velocity of 5kg cart, which is 10 m/s to right, and v2f is final velocity of the 8kg cart, which is 4 m/s to right. We know  final velocity of the combined carts is 3.846 m/s to the right,

(5 kg)(10 m/s) + (8 kg)(0 m/s) = (5 kg)(v1f) + (8 kg)(4 m/s)

50 kgm/s = 5 kgv1f + 32 kg*m/s

5 kgv1f = 18 kgm/s

v1f = 3.6 m/s to the right

Therefore, the new speed of the 5kg cart after the collision is 3.6 m/s to the right.

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If the velocity is 294 ft/s and the acceleration is 22 ft/[tex]s^{2}[/tex], the time will be 13.36 s.

Given,

Final velocity, v = 294 ft/s

acceleration, a = 22 ft/[tex]s^{2}[/tex]

According to the first equation of motion

v = u + at

Where u = initial velocity

and t = time

To find out time (t) we will use the first equation of motion as

v = u + at

or, t = [tex]\frac{v-u}{a}[/tex]

where u = 0 ft/s

So, t = [tex]\frac{294-0}{22}[/tex]

= 13.36 s

Hence, the time will be 13.36 s.

quiero una resolución para acer esto mandame un foto

The two phrases that describe the critical thinking skills used in the pursuit of science are options B and E. Analyzing  observations of a comet's velocity to estimate when it will pass by the sun again and writing detailed description of comet.

Critical thinking skills are very important in scientific investigations and data interpretations. Thinking on an observation or scientific backgrounds of a phenomenon and solving complex problems and sorting it eventually leads to the accurate conclusions for the problem.

Here, the estimation of velocity of a comet for its passage around sun will involve critical thinking and use of some theoretical knowledge as well. Gathering of people's opinion or searching history or for fund does nor need any critical thinking.

Making a description of comet through he observation by telescope also need some critical thinking. Therefore, options B and E are correct.

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As we consider the best options for generating electricity, it is important to prioritize renewable resources over nonrenewable ones. While nonrenewable resources such as coal and natural gas may provide a quick and reliable source of energy, they have significant negative impacts on both human health and the environment. Renewable resources, on the other hand, offer a sustainable solution to our energy needs without the harmful side effects. Solar, wind, and hydro power are all viable options that have been proven effective and efficient. While the initial investment may be higher, the long-term benefits are worth the cost. As we move towards a more sustainable future, it is crucial that we prioritize renewable resources for generating electricity.

Since no work is done, the power exerted is zero. Therefore, the man exerts no power on the wall.

In physics, force is defined as any action that can change the motion of an object or cause an object to accelerate. Force is a vector quantity, meaning that it has both magnitude (size or strength) and direction. The unit of force in the International System of Units (SI) is the Newton (N), which is defined as the amount of force required to accelerate a mass of one kilogram at a rate of one meter per second squared (1 N = 1 kg × 1 m/s^2). Force can be measured using a variety of instruments, such as spring scales, strain gauges, or force plates. Some common types of forces include gravitational force, electromagnetic force, frictional force, and normal force. The study of forces and their effects on the motion of objects is known as mechanics and is a fundamental concept in physics.

Here,

a. The man does not do any work on the wall because the wall does not move. Work is only done when there is a displacement in the direction of the force applied.

b. Since no work is done, no energy is used or transferred.

c. The power exerted by the man can be calculated using the formula:

Power = Work / Time

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Answer:

The type of construction for this project is commercial. This is because the hotel is intended for business purposes, and will generate income for the owners through renting out rooms and other amenities. Commercial construction typically involves larger and more complex projects than residential construction, and often requires specialized expertise in areas such as HVAC, plumbing, and electrical systems.

For the friction pile foundation, materials will include piles, rebar, and concrete. Workers will be required to install the piles and rebar, and pour the concrete to create a stable foundation for the building. Workers may also be required to excavate the site to prepare for the foundation.

For the glass curtain wall, materials will include glass panels, metal framing, and sealant. Workers will be required to install the metal framing and sealant, and then attach the glass panels to create a transparent and aesthetically pleasing exterior for the building.

Carpenters and ironworkers will contribute to the project by installing the structural steel framework for the building, which will support the floors, walls, and roof. Carpenters will also be required to install interior finishes such as doors, trim, and cabinetry. Materials needed for these tasks will include structural steel, wood framing, drywall, and various finishing materials such as paint and flooring. Ironworkers will also be responsible for installing any necessary safety features, such as guardrails or safety nets, to protect workers during construction.

Explanation:

The total sound pressure level of the five violins is 47 dB, which is 13 dB less than the sound pressure level of a single violin at 60 dB.

The total intensity of the five violins can be found by summing their individual intensities. The intensity of a sound wave is proportional to the square of the sound pressure level, so we can use the following equation:

I = I0 * 10^(L/10)

where;

Since each violin has a sound pressure level of 60 dB, the intensity of each violin can be calculated as follows:

I_violin = I0 * 10^(60/10) = 1e-12 * 1000 = 1e-9 W/m^2

The total intensity of the five violins can then be found by adding the individual intensities:

I_total = 5 * I_violin = 5 * 1e-9 = 5e-9 W/m^2

To find the sound pressure level corresponding to this total intensity, we can use the inverse of the equation above:

L = 10 * log10(I/I0)

L_total = 10 * log10(I_total/I0)

= 10 * log10(5e-9/1e-12)

= 10 * log10(5e3)

= 47 dB

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The economic consequence matches which level of education are :

Studies have shown that individuals with a high school diploma or higher tend to have higher incomes and greater access to well-paying jobs, which can lead to increased purchasing power and higher tax revenues for their local communities.

In contrast, individuals who have not completed high school may be more likely to struggle with unemployment or low-paying jobs, which can lead to a greater need for social assistance programs and less tax collected by local governments.

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When a company develops and continues to improve its products, it is using the product development marketing function.

Product, pricing, place, and promotion make up the four Ps. They serve as an illustration of a "marketing mix," or the collection of tools and techniques utilized by marketers to accomplish their marketing goals.

The selling function entails identifying the requirements and desires of the customer and then providing planned, personalized communication that affects purchase decisions and expands potential future business relationships. The duty of this is to genuinely deliver the goods that clients demand.

Determine the consumer's needs: Identifying the demands and desires of the market's consumers is the first stage in the marketing function. As a result, companies or enterprises need to acquire client information and analyze the data they have collected.

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The little number you see to the right of the symbol for an element is called a subscript. That number indicates the number of atoms of that element present in the compound.

The x-axis point 2.202 m to the right of the origin is where the electric field caused by the two charges is zero.

A positive line charge with a uniform density is separated by r0 from a positive point charge that has been released from rest. The speed v of the point charge is proportional to A as a function of the instantaneous separation r from the line charge (rr0)

The electric field caused by Q1 at a position along the x-axis is given by:

E1 = kQ1/x^2

Similar to that, the electric field caused by Q2 at a point on the x-axis is given by:

E2 = kQ2/(x - 2)^2

As a result, we must determine the value of x where:

E1 + E2 = 0

The result of substituting the values of E1 and E2 is:

kQ1/x^2 + kQ2/(x - 2)^2 = 0

Simplifying the equation, we get:

Q1/(4πε0x^2) + Q2/(4πε0(x - 2)^2) = 0

where ε0 is the permittivity of free space.

Substituting the given values of Q1 and Q2, we get:

(2.8×10−5)/(4πε0x^2) - (5.4×10−6)/(4πε0(x - 2)^2) = 0

Multiplying both sides by (4πε0x^2(x - 2)^2), we get:

(2.8×10−5)(x - 2)^2 - (5.4×10−6)x^2 = 0

Expanding the equation and simplifying, we get a quadratic equation in x:

2.8×10−5x^2 - 1.12×10−4x + 6.48×10−6 = 0

Solving this quadratic equation using the quadratic formula, we get:

x = 0.064 m or x = 2.202 m

The null point must be to the right of the positive point charge because the positive point charge is fixed at the origin. Hence, the null point is at x = 2.202 m.

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A projectile is shot up vertically with a velocity of  [tex]100ms^-^1[/tex], so the projectile takes approximately 8.66 seconds to reach a height of 375 meters, one can use the equations of motion to calculate the time it takes for a projectile to reach a given height.

using the equations of motion this will be solved ,

the initial velocity of the projectile is 100 m/s, the acceleration is -g (where g is the acceleration due to gravity, approximately [tex]9.8 m/s^2[/tex]), and the initial displacement is 0 m.

s = ut + 0.5a[tex]t^2[/tex]

t = √(2s/a)

t = √(2 x 375 m / [tex]9.8 m/s^2[/tex])

t = 8.66 s (rounded to two decimal place)

Hence, A projectile is shot up vertically with a velocity of [tex]100ms^-^1[/tex], so the projectile takes approximately 8.66 seconds to reach a height of 375 meters.

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The distinction among renewable and nonrenewable is substantial. One explanation for why some materials are unique to specific locations is the movement of tectonic plates. On Earth, not every resource can be found.

Huge fragments of the Planet's crust and upper mantle make up tectonic plates. They are composed of both continental and oceanic crust. Along pre ridges and the significant faults that define the plate boundaries, earthquakes happen.

According to the idea of plate tectonics, Earth's crust is made up of enormous solid rock slabs called "plates" that move across the beneath, the rock inner layer above the planet's core. The crust is a part of the solid outer layer of the earth.

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Conformity is more likely in individuals from collectivist cultures. In collectivist cultures, social harmony and group cohesion are highly valued, and individuals are expected to prioritize the needs and goals of the group over their own individual needs and desires. This emphasis on group harmony can lead to a greater tendency towards conformity, as individuals strive to fit in with the group and avoid standing out or causing conflict.

In contrast, in individualistic cultures, there is a greater emphasis on individual autonomy and self-expression, and conformity is generally less valued. Individuals in individualistic cultures are more likely to prioritize their own personal goals and values over those of the group and may be more willing to express their individuality and deviate from group norms.

Before they begin to fall, the potential energy of the roadrunner and the coyote is the same regardless of their mass. Both the roadrunner and the coyote have zero kinetic energy just before they begin to fall.

The energy an individual or an object has as a result of motion—in this case, the motion of the falling apple—is known as kinetic energy. Potential energy, which exists in a bike that is parked on top of a hill, is converted to kinetic energy when you start riding it downhill.

By virtue of energy conservation, kinetic energy (KE) must be equal to the change in potential energy (qV), or vice versa. The voltage between the plates and the electron's energy are numerically equivalent in electron-volts. A 5000-V potential difference, for instance, results in 5000-eV electrons.

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Answer:

Explanation:

Amplitude of first wave a1=4

Amplitude of second wave a2=3

Angle between two waves =Π/2

Resultant amplitude=[tex]\sqrt{a_{1} ^{2}+a_{2} ^{2} +2a_{1} a_{2} cos\alpha }[/tex]

=[tex]\sqrt{4^{2}+3^{2} +2*4*3*cos90 }[/tex]

=5

Answer is a

The electric current is of two types, direct current and alternating current. Direct current do not change its direction and amperage with time whereas alternating current change with time.

Direct current (DC) is an electric current which is uni-directional, and so the flow of charge is always in the same direction. As opposed to the alternating current, the direction and amperage of direct currents do not change with time. Direct current is used in many household electronics and in all the devices which use batteries.

Alternating current is an electric current which periodically reverses its direction and change its magnitude continuously with the time in contrast to direct current, which flows only in one direction. The current produced by the generators or turbines is the AC current, as it is the current which is obtained from our home power sockets.

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1) Yes, there is acceleration since the direction is changing

2) The acceleration is towards the center of the carousel

3) It is centripetal acceleration

4) You will fall off.

There is acceleration when riding a carousel that is turning at a steady rate, even though the speed of the carousel remains constant. This is because acceleration is a change in velocity, which includes a change in direction.

When riding a carousel, the direction of motion is constantly changing as the rider moves in a circle, even though the speed remains constant. Therefore, the rider is experiencing acceleration.

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The electrical force between two charged objects decreases as the distance between them increases. This means that as the distance between two positively charged pith balls increases, the electrical force between them decreases. Therefore, the electrical charge on each pith ball is not affected by the distance between them. The charge on each pith ball will remain the same regardless of the distance between them. However, the electrical force between the pith balls will be weaker at greater distances, and stronger at smaller distances.

Answer:

i'm pretty sure what the other guy means is:

The greater the distance between the pith balls, the lesser the amount of electric charge that exists between them.

Explanation:

"This means that as the distance between two positively charged pith balls increases, the electrical force between them decreases"

Answer:

The type of construction in this case is commercial construction. This is because the hotel will be used for commercial purposes, specifically to provide accommodation to paying guests.

For the friction pile foundation, the materials needed will include concrete and steel. Workers will be required to drill holes into the ground and insert steel reinforcing bars into them. The holes will then be filled with concrete to create a solid foundation. Workers such as concrete pourers, foundation drillers, and steelworkers will be required for this part of the project.

For the glass curtain wall, materials needed will include glass panels, metal framing, and sealant. Workers such as glaziers, metal fabricators, and caulking specialists will be required to install the glass panels and metal framing. The sealant will be used to create a weather-tight seal between the glass panels and the metal framing.

Carpenters will contribute to the project by constructing the interior walls, installing doors and windows, and creating millwork such as cabinets and shelves. They will need materials such as wood, nails, screws, and drywall.

Ironworkers will contribute to the project by erecting the steel framework for the building. They will need materials such as steel beams, bolts, and welding equipment to do their jobs.

Explanation:

Gravitational acceleration on the newly discovered planet is calculated to be approximately 26.7 m/s².

The acceleration of an object in free fall within a vacuum is known as gravitational acceleration.

As we know, g = G * M / r²

G is the gravitational constant (6.67 x 10⁻¹¹  N*m²/kg²)

M is the mass of the planet

r is the radius of the planet

Plugging in the given values, we get:

g = (6.67 x 10⁻¹¹ N*m²/kg²) * (7.0 x 10²⁴ kg) / (5600 km)²

g = (6.67 x 10^⁻¹¹  N*m²/kg²) * (7.0 x 10²⁴  kg) / (5600 x 1000 m)²

g ≈ 26.7 m/s²

Therefore, the gravitational acceleration on the newly discovered planet is approximately 26.7 m/s².

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The star's surface has a temperature of about 3622.5 K.

In comparison to the same thing at a cooler temperature, hotter objects produce more energy at all wavelengths. Even though the peaks of the 4,000 K object are closer to this wavelength, the 6,000 K object produces more energy at this wavelength than the 4,000 K one.

The Wien's displacement law can be used to calculate the star's surface temperature.

λ_max = b/T

Before applying Wien's law, we must convert the supplied wavelength of 800 nm to metres.

800 nm = 800 × 10⁻⁹ m

When the values are added to the formula, we obtain:

λ_max = b/T

800 × 10⁻⁹ m = (2.898 × 10⁻³ m·K) / T

Solving for T, we get:

T = (2.898 × 10⁻³ m·K) / 800 × 10⁻⁹ m

T = 3622.5 K

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Answer:

The answer is 310 N.

To solve for the average force, we can use the equation:

average force = mass x acceleration

where mass is 76.0 kg and acceleration is (9.0 m/s - 0.0 m/s) / 2.5 s = 3.6 m/s^2 (acceleration is the change in velocity over time).

Thus, the average force is:

average force = 76.0 kg x 3.6 m/s^2 = 273.6 N

Rounding to the nearest ten, the answer is 310 N.

Explanation:

Answer:

Below

Explanation:

Final Kinetic Energy = 1/2 m v^2

           5 x 10^2 J    = 1/2 ( 5 kg)(v^2 )

                 1000 / 5 = v^2

                     200 = v^2

                         v = 10 sqrt 2      or   14.1 m/s

The height the two balls will collide at 5.1 m above the ground after travelling for 1 second

Let's assume that the upward direction is positive, and the downward direction is negative. We can use the kinematic equations of motion to solve the problem.

For the ball that is dropped, we can use the equation:

y = y₀ + v₀t + 1/2 at²

Where:

Therefore, the equation becomes:

y = 10 + 0t - 1/2 (9.8)t²

For the ball that is thrown upward, we can use the equation:

y = y₀ + v₀t + 1/2 at²

where:

Therefore, the equation becomes:

y = 0 + 10t - 1/2 (9.8) t²

Since both balls will collide at the same height, we can equate the two equations to solve for t and y.

10 - 1/2 (9.8) t² = 10t - 1/2 (9.8) t²

Simplifying the equation, we get:

10t = 10

t = 1 second

Substituting t = 1 second into either equation, we get:

y = 10 * (1) - 1/2 (9.8) * (1)²

y = 5.1 meters

Therefore, the two balls will collide at a height of 5.1 meters above the ground.

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The centripetal force pulling the weight inward is 19.7 N. The closest option to this value is option (D), 19.7 N.

What is Centripetal Force?

Centripetal force is a force that acts on an object moving in a circular path, directing it toward the center of the circle. In other words, it is the force required to keep an object moving in a circular path, rather than flying off in a straight line. The word "centripetal" comes from the Latin words "centrum", which means "center", and "petere", which means "to seek or aim for".

The centripetal force, which is the force acting on an object moving in a circular path, is given by the formula:

F = m * v^2 / r

where F is the centripetal force, m is the mass of the object, v is its velocity, and r is the radius of the circular path.

In this case, the mass of the weight is 770 g, or 0.77 kg, the velocity is 4.24 m/s, and the radius is 0.94 m.

F = (0.77 kg) * (4.24 m/s)^2 / 0.94 m

F = 19.7 N

Therefore, the centripetal force pulling the weight inward is 19.7 N. The closest option to this value is option (D), 19.7 N.V

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