A 1.5 kg ball is thrown at 10 m/s. What is the ball's momentum?

Answer:

Qt = 940500 [J]

Explanation:

In order to solve this problem and understand it well, we must analyze that the ice melts or changes phase at a temperature of 0 [°c], then the water at a temperature of 100 [°C] evaporates or changes phase. That is, we have 5 different stages of water (initially in the form of ice), which are:

-) From -30 [°C] to 0 [°C] = Sensible change of temperature

-) At 0 [°C] = Latent heat of melting ice = 334 x 10³ [J/kg]

-) From 0 [°C] to 100 [°C] = Sensible change of temperature

-) At 100 [°C] = Latent heat of fusion for water = 2260 x 10³ [J/kg]

-) From 100 [°C] to 130 [°C] = Sensible change of temperature (superheating)

We can calculate the sensible heat of any process with the following expression:

\(Q=m*C_{p}*(T_{f}-T_{i})\)

where:

Q = heat or thermal energy [J]

m = mass of the body or substance = 300 [g]

Cpw = specific heat of the water = 4180 [J/kg*°C]

Cpi = specific heat of the ice = 2090 [J/kg*°C]

Tfinal = final temperature of the process [°C]

Tinicial = initial temperature of the process [°C]

And for some latent heat process, we can calculate the thermal energy using the following expression:

\(Q_{lat}=m*Dh_{fus/eva}\)

where:

Dhfus/eva = Fusion heat or latent heat [J/kg]

So, we need to calculate the fice processes.

\(Q_{1}=0.3*2090*(0-(-30))\\Q_{1}=18810 [J]\\Q_{2}=0.3*334*10^{3} \\Q_{2}=100200[J]\\Q_{3}=0.3*4180*(100-0)\\Q_{3}=125400[J]\\Q_{4}=0.3*2260*10^{3}\\Q_{4}=678000[J]\\Q_{5}=0.3*2010*(130-100)\\Q_{5}=18090[J]\)

And the final step is the sum of all the five heat processes.

\(Q_{t}=Q_{1}+Q_{2}+Q_{3}+Q_{4}+Q_{5}\\Q_{t}=18810+100200+125400+678000+18090\\Q_{t}=940500[J]\)

The planet that has an axis that points roughly straight up, and thus has no seasons to speak of, is Uranus.

The Earth's axis is tilted relative to its orbit around the Sun, which causes the changing seasons we experience throughout the year.

However, there are other planets in our solar system with different axial tilts, leading to different seasonal patterns.

Uranus is the planet known for having an extreme axial tilt. Its axis is tilted at an angle of about 98 degrees relative to its orbital plane.

Due to this extreme tilt, Uranus' axis points roughly straight up and down as it orbits the Sun.

Since the axis is nearly perpendicular to its orbit, Uranus experiences very little variation in sunlight throughout its year.

As a result, Uranus has minimal or no observable seasons compared to other planets in our solar system.

Therefore, the planet that has an axis that points roughly straight up and thus has no seasons to speak of is Uranus.

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Answer:

Explanation:

no

The 28-cm-diameter disk in (figure 1) can rotate on an axle through its center clockwise with net torque 0.7 Nm.

Given from figure is ,

D = 28 cm = 0.28 m

r = D/2 = 0.14 m

θ = 45°

F₁ = 30N

F₂ = 20N

F₃ = 30N

To calculate net torque,

∴ τ = -(F₁ × r) + (F₂ × r/2) + (F₃ × r/2 )(sin 45°)

∴ τ = -(3 0 × 0.14) + (20 × 0.07) + (30 × 0.07 × 0.707)
∴ τ = -(4.2) + (1.4) + (2.1)

∴ τ = -0.7 Nm

The net torque about the axle will be -0.7 Nm and the negative sign indicates that it is clockwise .

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The evolution of energy matrices, the social and environmental consequences of energy sources, and the relationship between energy development and industrial development are critical aspects of understanding the interplay between energy and the modern world. Balancing the need for energy with sustainability and minimizing environmental impacts is a key challenge for societies today.

a) The evolution of the main energy matrices after the industrial revolution:

The industrial revolution marked a significant shift in the sources of energy used to power the growing industries and societies. Prior to the industrial revolution, human and animal labor, along with limited use of water and wind power, were the primary sources of energy. However, with the advent of steam engines and mechanization, there was a need for more abundant and efficient sources of energy.

Coal: Coal became the dominant energy source during the early stages of the industrial revolution. It provided the necessary fuel for steam engines and played a crucial role in powering factories, railways, and steamships.

Oil: The discovery and commercialization of oil in the late 19th century revolutionized the energy landscape. Oil became a major source of energy for transportation, as it fueled the internal combustion engines of automobiles, trucks, and airplanes.

Natural Gas: With the expansion of oil drilling, natural gas also emerged as an important energy source. It is used for heating, electricity generation, and as a feedstock for various industrial processes.

Nuclear Energy: The development of nuclear power in the mid-20th century introduced a new source of energy. Nuclear reactors harness the energy released from nuclear fission reactions to generate electricity.

Renewable Energy: In recent decades, there has been a growing emphasis on renewable energy sources such as solar, wind, hydroelectric, and geothermal power. These sources offer sustainable alternatives to fossil fuels, with lower environmental impact and the potential for long-term energy security.

b) The social and environmental consequences of these energy sources:

Each energy source has its own social and environmental consequences:

Fossil Fuels: The burning of fossil fuels, such as coal, oil, and natural gas, releases greenhouse gases and contributes to climate change. Extraction of fossil fuels can lead to habitat destruction, water pollution, and health hazards for workers and nearby communities.

Nuclear Energy: While nuclear energy does not produce greenhouse gas emissions during operation, it presents risks associated with accidents, radioactive waste disposal, and potential weaponization of nuclear materials. Public safety concerns and environmental risks have led to debates over the use of nuclear power.

Renewable Energy: Renewable energy sources offer benefits in terms of reduced greenhouse gas emissions and environmental sustainability. However, their deployment may require land use changes, and some technologies (e.g., large-scale hydroelectric dams) can cause ecological disruptions and displacement of communities.

c) The relationship between energy development and degree of industrial development:

Energy development and industrial development are closely intertwined. The availability of affordable and reliable energy sources is crucial for driving industrialization and economic growth. Access to abundant energy resources enables countries to power their industries, expand transportation networks, and improve living standards.

Countries that have invested in the development and exploitation of energy sources have typically experienced accelerated industrialization and technological advancement. The ability to secure and utilize energy resources efficiently has been a determining factor in a country's competitiveness and economic prosperity.

Conversely, countries that lack access to energy sources or fail to invest in their energy sectors may face challenges in industrial development. Limited energy availability can constrain production capacities, limit access to modern technologies, and hinder economic progress.

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Answer:

The horizontal distance the ball travels is approximately 4.055 meters

Explanation:

The given parameters are;

The height from which the child kicks the ball = 3.5 m

The horizontal speed of the ball = 4.8 m/s

Therefore, we have;

The time it takes the ball to hit the ground is given by the relation;

h = u·t + 1/2·g·t²

Where;

u = The initial vertical velocity of the ball = 0 m/s

t = The time it takes the ball to hit the ground

g = The acceleration due to gravity = 9.81 m/s²

h = The height of the ball = 3.5 m

3.5 = 0 × t + 1/2 × 9.81 × t²

3.5 = 1/2 × 9.81 × t²

∴ t² = 3.5/(1/2 × 9.81)

∴ t = √(3.5/(1/2 × 9.81) = 0.8447 s

t ≈ 0.8447 s

The time the ball takes in flight = t ≈ 0.8447 s

Therefore;

The horizontal distance the ball travels = The horizontal velocity × The time of flight

∴ The horizontal distance the ball travels = 4.8 × 0.8447 ≈ 4.055

The horizontal distance the ball travels ≈ 4.055 meters.

Answer:

force

Explanation:

Force is a push or a pull of an object that causes the object to speed up, slow down, or stay in one place. In other words, a force is what causes an object to move. Friction and gravity are two types of forces that influence how an object moves.

Answer:

v = v +at = 22 + (1.6 6.8 s  ms) = 33 ms

Explanation:

1. speed = distance/time taken

= 1200/5×60

= 4 m/sec.

then Siham run 4 meters each ine second.

2. if speed = distance/time taken

then time taken= distance/ speed

= 200/1.5 = 200÷(3/2)

= 200×(2/3)

= 133.3333....sec.

then I need 133.333 sec to get to class early.

3. from the previous example

then distance = speed × time taken

= 60×5.5

= 60×(11/2)

=330 km. or 330×10³m.

then Mahmoud ❤️ covers 330km.

4.the q question is repeated.

The acceleration of a projectile is option d, -9.80m/s2 in the y axis. A projectile is any object that is thrown or launched into the air and is subject to gravity. As the projectile moves through the air, it experiences two main types of forces: gravity and air resistance.

The force of gravity acts in the downward direction, pulling the projectile towards the ground. The acceleration due to gravity is 9.80m/s2, but since the projectile is moving in a curved path, the acceleration vector points downward and is negative (-9.80m/s2) in the y-axis.
The acceleration in the x-axis is usually zero unless there are external forces acting on the projectile, such as wind or air resistance. In that case, the acceleration in the x-axis would depend on the direction and strength of those forces.
In summary, the acceleration of a projectile is primarily due to gravity, and the direction and magnitude of the acceleration vector depends on the direction and motion of the projectile. For a projectile moving in a vertical direction, the acceleration vector points downward and is -9.80m/s2 in the y-axis.

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Answer:

Gallium Arsenine

Explanation:

Answer:

No idea now

Explanation:

wil get back to you in few minutes

As the question depicts the trail is 10Km long but the end of the trail is 300m north from the beginning, Here the average velocity comes out to be 100m/hr.

Velocity is defined as the displacement covered by an object or a body in unit time interval.

From the problem, it is clear that the distance is 10Km but the displacement comes out to be 300m.

The time from 2:00 pm to 5:00 pm is a total of 3hours.

Now, the velocity is determined from the following formula

\(V=\dfrac{d}{t}\)

here,

d= displacement

t= time

So, by putting values in above formula we get,

\(V=\dfrac{300 m}{3 hrs}\)

\(V=100m/hr\)

So, the average velocity of Sofia is 100m/hr

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Answer:

Hunter is a electrician

Answer: He's an Electrician !

Explanation:

Answer:

Saturn

Explanation:

If the coefficient of friction is.2, the frictional force is 100 N.

The resistive force of friction (Fr) divided by the normal or perpendicular force (N) pushing the objects together yields the coefficient of friction (fr), which is a numerical value. The formula fr = Fr/N serves as a representation of it.

F = N is the equation for frictional force. Let's use the 2-kg block of wood that is resting on a table to be pushed from rest as an example. The static friction coefficient is taken into account in this situation. The static coefficient of wood is 0.5.

F = μN

F = 2 × 100 ×cos60°

F = 200 × 1/2

F = 100 N

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Option B: the action that generally increases the safety of a gravity dump is Installation of a remote dump valve.

In the context of industrial processes, a gravity dump refers to a method of emptying or draining a vessel or tank using gravity. Installing a remote dump valve allows for remote operation of the dumping process, which can enhance safety by providing better control and minimizing the need for direct personnel interaction with the dump site. Remote operation reduces the risk of exposure to hazardous materials or substances during the dumping process.

It's important to note that specific safety measures might vary depending on the nature of the material being dumped, the system design, and applicable regulations. Therefore, it's always recommended to refer to relevant guidelines, industry standards, and specific equipment instructions to ensure appropriate safety measures are implemented.

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Given data

The mass of the sparrow is m = 30 g = 0.03 kg

The initial momentum on the sparrow is pi = 0.36 kgm/s

The initial speed of the sparrow is u = 12 m/s

The duration of the time interval is t = 12 s

The magnitude of the constant force is F = 0.02 N

The expression for the final momentum is given as:

Substitute the value in the above equation.

Thus, the final momentum of the sparrow is 0.6 kgm/s.

Answer:

X: Absorbs energy from the core.

Y: Releases energy to the photosphere.

Explanation:

Convection is a mode of heat transfer through fluids (liquids or gas), and it requires material medium for its propagation.

The energy absorbed from the core of the Sun, is transferred through X (convection zone) by convectional process, and it flows to Y (radiative zone). Since the regions X and Y have different functions, the heat propagates from X causing photons to traverse through Y where it get released into the photosphere or the Sun's surface.

Therefore;

X: Absorbs energy from the core.

Y: Releases energy to the photosphere.

Answer:

X: Takes longer for photons to move through

Y: Releases energy to the photosphere

Explanation:

The speed of wave is 3m/s

It is a linear second order partial differential equation which describe the propagation of oscillation at a fixed speed in some quantity .

Since , f = 1/t

           f = 1/2 = 0.5 Hz

from wave equation

v(speed) = frequency  * wavelength

      v(speed )         = 0.5 * 6

      v(Speed)  = 3 m/s

Hence , The speed of wave is 3m/s

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The spring will stretch beyond its natural length by 1.5 cm when a force of 50 N is applied.

The amount of stretching a spring experiences when a force of 50 N is applied to it is determined by Hooke's Law. According to Hooke's Law, the force applied to the spring and the extension of the spring are proportional. This means that the greater the force applied to the spring, the greater the extension.

Using Hooke's Law, the amount of extension of the spring when a force of 50 N is applied can be calculated using the following formula:

Extension = Force/Spring Constant

Where the spring constant is a measure of how stiff the spring is.

To calculate how far beyond its natural length (in cm) the spring will be stretched when a force of 50 N is applied, we first need to determine the spring constant of the spring in question. This can be done by measuring the natural length of the spring and then measuring how far it stretches with a known force. Once we have determined the spring constant, we can enter it into the formula above and solve for the extension.

For example, if the natural length of the spring is 15 cm and it extends to 18 cm with a force of 50 N, the spring constant would be 33.33 N/cm.

Using this spring constant, the extension of the spring when a force of 50 N is applied would be 1.50 cm

50/33.33 = 1.50.

Therefore, the spring will stretch beyond its natural length by 1.50 or 1.5 cm when a force of 50 N is applied.

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Answer:

No.

Explanation:

if it's in equilibrium then the torque or moment of inertia on both sides should cancel.

Torque is a vector quantity, force times distance.

When doing these, make sure your units are the same by changing centimeters to meters first.

Left side is 400N * (-2.5m) = -1000 Nm

Right side is 300N * (3.5m) = 1050 Nm

-1000 Nm + 1050 Nm does not equal zero so there's a torque on the teeter and it will rotate clockwise. The system is not yet in equilibrium.

The truck's velocity is 25 m/s.

It is given that,

                         mass, m= 36,287 kg

               momentum, p =  907,175 kg-m/s

Using the formula of momentum, we know that

                                     p = mv

Plugging in the values

               907,175 kg-m/s = 36,287 kg x v

                           v = 25 m/s

So, the velocity of the truck is 25 m/s.

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Answer:25

Explanation:your welcome!:)

Answer:

The two of the following measurements, when taken together, would allow engineers to find the total mechanical energy dissipated during the skid

B. The contact area of each tire with the track.

C. The co-efficent of static friction between the tires and the track.

D. The co-efficent of static friction between the tires and the track.

Explanation:

A possible length for the third side of the scalene triangle could range between 12 cm and 42 cm.

To determine a possible length for the third side of a scalene triangle, we can use the triangle inequality theorem. In geometry, the triangle inequality theorem states that the sum of the lengths of any two sides of a triangle must be greater than the length of the third side.

Given that two sides of the triangle measure 15 cm and 27 cm, let's consider the possible range for the length of the third side:

1. The third side must be greater than the difference between the lengths of the other two sides: |15 - 27| = 12 cm.

2. The third side must be smaller than the sum of the lengths of the other two sides: 15 + 27 = 42 cm.

Therefore, a possible length for the third side of the scalene triangle could range between 12 cm and 42 cm.

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Answer:

 i'm not sure check back with me in a

Explanation:

The maximum power that could be produced by the steam engine is approximately 88.2 kW. The maximum power that could be produced by the steam engine can be calculated using the thermodynamic equation for the efficiency of a Carnot cycle, which is given by:

η = (T₁ - T₂) / T₁

where η is the efficiency, T₁ is the temperature of the heat source, and T₂ is the temperature of the heat sink. In this case, the heat source temperature is unknown, but we can find it using the saturation temperature at the pressure of 6.8 MPa, which is approximately 364°C. Similarly, the temperature at the heat sink pressure of 1.21 MPa is approximately 191°C.

Using the efficiency equation and the given heat input rate of 250 kW, we can calculate the maximum power output of the steam engine as:

P max = η * Qin

where P max is the maximum power output and Qin is the heat input rate. Plugging in the values, we get:

P max = η * 250 kW = (364 - 191) / 364 * 250 kW ≈ 88.2 kW

Therefore, the maximum power that could be produced by the steam engine is approximately 88.2 kW.

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Given :

Father drove 176 km in 7 hours.

For the first 92 km he spent for 4 hours.

To Find :

His average speed for the remaining journey .

Solution :

\(v_{avg}=\dfrac{u_1+u_2}{2}\\\\v_{avg}=\dfrac{u_1}{2}+\dfrac{u_2}{2}\\\\\dfrac{176}{7}=\dfrac{92}{4\times 2}+\dfrac{u_2}{2}\\\\\dfrac{u_2}{2}=\dfrac{176}{7}-\dfrac{92}{8}\\\\u_2=13.64\times 2 \ km/h\\\\u_2=27.28\ km/h\)

Therefore , his average speed for the remaining journey is 27.28 km/h .

Hence , this is the required solution .