A book sliding across a horizontal tabletop slows until it comes to rest. Describe what change, if any, occurs in the book's kinetic energy and internal energy as it slows.

Answer:

The greatest force of gravity on the ball will occur at the point when the ball is near to hit the ground

Explanation:

We know that the earth's center attracts everything towards its center with an acceleration of 9.8 m/s² so it simply means that the change in velocity must occur to produce acceleration. When the ball comes towards the earth, its speed  continuously increases and it is at maximum level when it is about to hit the ground so this is the point where gravitational force is maximum.

I hope this helps ^_^

Kieran had a greater average speed than Jevon. Let us go into more detail in the explanation below. To compare the average speeds of Kieran and Jevon, we need to find out the speed of each person.

We can use the formula speed = distance/time. Kieran ran 8 laps in 18 minutes, which means he ran 8/18 = 0.44 laps per minute. To find out Kieran's speed, we need to multiply this by the length of one lap. If we assume that the length of one lap is 400 meters, then Kieran's speed is:0.44 laps per minute × 400 meters per lap = 176 meters per minute Jevon ran 6 laps of the track, but we don't know how long it took him.

Therefore, we can't calculate his speed directly. However, we can still compare his speed to Kieran's by using ratios. If we assume that Jevon ran the same length of track as Kieran, then we can write the following equation: Kieran's speed/Jevon's speed = Jevon's time/Kieran's time.

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The acceleration of the object can be calculated using the formula f = ma. With a force of 7.92 N and a mass of 3.6 kg, the acceleration is approximately 2.2 m/s².

According to Newton's second law of motion, the force acting on an object is equal to the product of its mass and acceleration. The formula is represented as f = ma, where f is the force, m is the mass, and a is the acceleration.

Given that f = 7.92 N and m = 3.6 kg, we can substitute these values into the equation and solve for a.

f = ma

7.92 N = 3.6 kg * a

To find the value of a, we can rearrange the equation:

a = f / m

a = 7.92 N / 3.6 kg

a ≈ 2.2 m/s²

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Answer:

can anyone translate

Explanation:

because i cant read this

Answer:

Explanation:

There is no picture!

The angular momentum of this isolated system is 78.75 kgm²/s.

The angular momentum (L) is defined as the distance of the object from a rotation axis multiplied by the linear momentum.

L = mvr

where;

v = 2πr/T

where;

v = (2π x 0.5) / 3

v = 0.63 m/s

L = mvr

L = 250 kg  x  0.63 m/s  x   0.5 m

L = 78.75 kgm²/s

Thus, the angular momentum of the isolated system depends on the mass and speed of the spacecraft.

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The magnitude of the angular acceleration of the centrifuge is approximately 68.7 rad/s^2.

To solve this problem, we can use the formula for the angular displacement of an object

θ = ω_i t + 1/2 α t^2

where θ is the angular displacement, ω_i is the initial angular velocity, α is the angular acceleration, and t is the time.

In this case, we know that the initial angular velocity ω_i is 3,800 rev/min. To use this in the formula, we need to convert it to radians per second

ω_i = (3800 rev/min) x (2π rad/rev) x (1/60 min/s) = 397.89 rad/s

We also know that the final angular velocity ω_f is 0, since the centrifuge comes to rest. Therefore, we can use the formula for the final angular velocity in terms of the initial angular velocity, angular acceleration, and time

ω_f = ω_i + α t

Since ω_f is 0, we can solve for the time it takes for the centrifuge to come to rest

0 = ω_i + α t

t = -ω_i / α

We also know that the angular displacement of the centrifuge is 48 revolutions, or 96π radians (since 1 revolution = 2π radians). Plugging in the values we know and solving for α, we get

96π = (397.89 rad/s) (-397.89/α) + 1/2 α (-397.89/α)^2

96π = -397.89^2/α + 1/2 α (-397.89)^2/α^2

96π = -397.89^2/α + 1/2 (-397.89)^2/α

α = 397.89^2 / (2 x 96π)

α ≈ 68.7 rad/s^2

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Value analysis is a method used to evaluate the worth and effectiveness of an organization or project.

In the case of DEWA (Dubai Electricity & Water Authority), conducting a value analysis can provide insights into the overall value created by the organization. Here are some key points to consider in a value analysis of DEWA:

1. Service Quality: Evaluate the quality and reliability of the electricity and water services provided by DEWA. Assess factors such as uptime, response time, customer satisfaction, and the overall impact on the daily lives of residents and businesses in Dubai.

2. Cost Efficiency: Analyze the cost-effectiveness of DEWA's operations, including the generation, transmission, and distribution of electricity, as well as water production and distribution. Assess the efficiency of resource utilization, cost management practices, and the impact on consumer tariffs.

3. Sustainability: Evaluate DEWA's commitment to sustainable practices, such as renewable energy integration, water conservation efforts, and environmental stewardship. Assess the organization's contributions to reducing carbon emissions and promoting a greener future.

4. Innovation and Technology: Assess DEWA's adoption of innovative technologies, such as smart grids, advanced metering systems, and digital solutions. Evaluate the impact of these technologies on service delivery, efficiency, and customer experience.

5. Stakeholder Engagement: Analyze DEWA's relationships with stakeholders, including customers, suppliers, government entities, and the community. Assess the effectiveness of communication, collaboration, and the organization's contribution to social and economic development in Dubai.

By conducting a comprehensive value analysis of DEWA, stakeholders can gain a holistic understanding of the organization's performance, impact, and value proposition. This analysis can guide decision-making, identify areas for improvement, and support DEWA's ongoing efforts to provide reliable, sustainable, and affordable electricity and water services to the residents and businesses of Dubai.

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The force that causes centripetal acceleration of a car making a turn on a flat road is friction

The centripetal acceleration is required to create a centripetal force. The centripetal force that cause an object to turn in a circular path is due to the force of friction between the tyres and the road. The magnitude of centripetal force is numerically equal to the magnitude of frictional force.

Fc = f

m v² / r = μ N

Fc ∝ 1 / r

The larger the centripetal force the the smaller the radius of curvature.

Therefore, the force that causes centripetal acceleration of a car making a turn on a flat road is friction

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Answer:

2.3 m/s2

Explanation:

F = ma

a = F/m

a = 10.8 / 4.6

a = 2.3 m/s2

I hope this helps.

Answer:

The weight of the load can be calculated by using the principle of mechanical advantage of a lever. The mechanical advantage of a lever is the ratio of the force exerted on the load (F_L) to the force applied to the lever (F_A). In this case, the mechanical advantage of the lever is given by the ratio of the distance the load moves (0.2 m) to the distance the force is applied (1.2 m), or MA = 0.2/1.2 = 1/6.

So the force exerted on the load (F_L) is 6 times the force applied to the lever (F_A) and the weight of the load can be calculated as:

Weight of the load (F_L) = Mechanical advantage x Applied force (F_A)

F_L = (1/6) * 50 N = 8.33 N

So the weight of the load is 8.33 N.

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If both objects have a mass of 12 kg and are separated by 1.5 m, scenario A would have the least gravitational pull on them. (option-a)

The gravitational pull between any two objects is determined by both their masses and their separation from one another. The force of gravity is directly proportional to the product of the masses and inversely proportional to the square of the distance between the objects, according to Newton's law of universal gravitation.

We must choose the scenario with the least gravitational force among the ones provided. Let's examine each instance:

A. The weights of the first and second objects are each 12 kg, and their separation is 1.5 m.

B. Mass of object 1 = 15 kg, Mass of object 2 = 12(option-a)

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2.71 μF is the capacitance of the second capacitor.

What is voltage in simple terms?

Given

Frequency of AC generator   f = 440 Hz

Voltage a across capacitor  Vc  = 24 V

       Voltage across capacitor is

                  Vc     =  I  / 2 πf C 1    

                           I  =  ( 2 πf C 1 ) Vc  ........ ( 1)  

A second capacitor is conected in parallel combination with the forst capacitor . Voltage across each capacitor is same.

   Equivalent capacitance is   C1 + C 2  

       Voltage across capacitor is

                  Vc    = (  I  + 0.18 A ) / 2 πf ( C 1 + C2   )

                (  I  + 0.18 A )  =   2 πf ( C 1 + C2   ) * Vc    

                     ( 2 πf C 1 ) Vc  +  0.18   =    ( 2 πf C 1 ) Vc  +  ( 2 πf C 2 ) Vc    

                      ( 2 πf C 2 ) VC    = 0.18      

Capacitance of second capacitor is

                                C 2  =   0.18 A  / 2πf V C    

                                       = 0.18 / 2π ( 440 ) ( 24 )

                                        =   2.71*10-6 F    

                                                                 or

                                        =  ( 2.71*10-6 F    )( 1 μF   / 10-6 F  )

                                        = 2.71 μF

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Answer:

control group and experimental group

Answer:

D. x-rays

Explanation:

Lower frequency: Radio waves, microwaves and infrared have lower frequency than visible light. Shorter wavelength: Ultraviolet, x-rays and gamma rays have a shorter wavelength than visible light.

The amplitude of the pendulum at noon is approximately 0.78 m.

To determine the amplitude of the pendulum at noon, we need to consider the effect of damping on the oscillations. The amplitude of an oscillating system gradually decreases over time due to damping.

Given that the pendulum is started at 8:00 a.m. and the damping constant is 0.010 kg/s, we can use the formula for damped oscillations:

Amplitude = initial amplitude * e^(-damping constant * time)

The time elapsed from 8:00 a.m. to noon is 4 hours or 14400 seconds.

Using the given information, the initial amplitude of the pendulum is 1.2 m.

Amplitude at noon = 1.2 m * e^(-0.010 kg/s * 14400 s) = 0.78 m

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The mass of the bullet moving at the given values of velocity and kinetic energy is 6.4 × 10⁻⁴ kilogram.

Kinetic energy is simply a form of energy that a particle or object possesses due to its motion.

It is expressed as;

K = (1/2)mv²

Where m is mass of the object and v is its velocity.

Given the data in the question;

We substitute our given values into the expression above.

K = (1/2)mv²

3000kgm²/s² = 0.5 × m × (970m/s)²

3000kgm²/s² = 0.5 × m × 940900m²/s²

3000kgm²/s² = m × 470450m²/s²

m = 3000kgm²/s² ÷ 470450m²/s²

m = 0.00064kg

m = 6.4 × 10⁻⁴kg

Therefore, the mass of the bullet moving at the given values of velocity and kinetic energy is 6.4 × 10⁻⁴ kilogram.

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Answer:

we know that 1 kg = 1000g

therefore ;

1g = 1/1000 kg

723g = 723/1000

= 0.723kg is answer

a. Your speed will be 0.0628 m/s

b. The magnitude of your acceleration is 0.000263 m/s2

c. The ratio of your weight at the top of the ride to your weight while standing on the ground is 99.997%

d. The ratio of your weight at the bottom of the ride to your weight while standing on the ground is 100.003%

Using the data given above,

Where:

Radius = 15 m

Time for each loop = 25 minutes (25*60 = 1500 seconds) to complete.

a. To find the speed, which is the length of each loop per unit of time to complete each loop, we use the equation for uniform velocity v where:

v = C/t

Where:

Circumfrence of the ferris wheel; C = ?

Time to go round; t = 1500s

Circumference of the Ferris wheel would be:

C = 2πR = 2π*15 = 94.25 m

v = 94.25 / 1500

v = 0.0628 m/s

b. Since the circular motion is constant, the only acceleration from the motion is the centripetal acceleration. To find the magnitude of acceleration, we use the equation for centripetal acceleration which is:

ac = v²/r

Where:

Velocity; v = 0.0628 m/s

Radius; r = 15

ac = 0.0628/15

ac = 0.000263m/s²

c. Let g = 9.8 ms². At top of the ride, the centripetal acceleration would be pushing you up, while gravity pushes you down, so the weight you experience (compare to standing on ground would be):

g-ac/g

Where

Gravity; g = 9.8ms² (a constant)

Centripetal acceleration; ac = 0.000263m/s²

9.8 - 0.000263/9.8

= 0.99997

= 99.997%

d. At the bottom of the ride, both centripetal acceleration and gravity would be pushing you downward, making you feel like

g+ac/g

Where

Gravity; g = 9.8ms² (a constant)

Centripetal acceleration; ac = 0.000263m/s²

9.8 + 0.000263/9.8

= 1.00003

= 100.003%

Here's the complete question:

While at the county fair, you decide to ride the ferris wheel. having eaten too many candy apples and elephant ears, you find the motion somewhat unpleasant. to take your mind off your stomach, you wonder about the motion of the ride. you estimate the radius of the big wheel to be 15 m, and you use your watch to find that each loop around takes 25 seconds.

a.What is your speed?

b.What is the magnitude of your acceleration?

c.What is the ratio of your weight at the top of the ride to yourweight while standing on the ground?

d.What is the ratio of your weight at the bottom of the ride toyour weight while standing on the ground?

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The answer depends on the force-distance relationship for stretching the bands and the displacement of the stone from the equilibrium position.

The force required to stretch one rubber band by 1.0 cm is 15 N. Therefore, the force required to stretch it by 0.20 m is (15 N/0.01 m) * 0.20 m = 300 N.

The potential energy stored in each rubber band is given by the formula PE = (1/2) * k * \(x^2\), where k is the spring constant and x is the displacement. Since we have two rubber bands, the total potential energy stored in the two bands together is PE = 2 * (1/2) * k * \(x^2\).

Substituting the values, where k = 300 N/m and x = 0.20 m, we can calculate the potential energy:

PE = 2 * (1/2) * (300 N/m) * \((0.20 m)^2\) = 12 J.

Therefore, the potential energy stored in the two bands together when the stone is pulled back 0.20 m is 12 J.

(b) To determine the speed at which the stone leaves the slingshot, we can use the principle of conservation of mechanical energy. At the point of release, all the potential energy stored in the bands is converted into kinetic energy of the stone.

The potential energy stored in the bands is given by PE = (1/2) * m * \(v^2,\) where m is the mass of the stone and v is its velocity.

Equating the potential energy to the initial potential energy (12 J) and solving for v, we have:

(1/2) * m * \(v^2\) = 12 J.

Substituting the values, where m = 50 g = 0.05 kg, we can solve for v:

(1/2) * (0.05 kg) * \(v^2\) = 12 J.

\(v^2\) = (12 J) / (0.025 kg) = 480 \(m^2/s^2.\)

Taking the square root of both sides, we find v ≈ 21.9 m/s.

Therefore, the stone leaves the slingshot with a speed of approximately 21.9 m/s.

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Answer:

It is a gene!!

Explanation:

It is because RNA is referred to as a gene. Genes are contained in chromosones.

Answer:

Therefore, when a light ray traveling through air enters water or glass it slows down, refracts, and bends toward the normal line. ... For example, when light goes from glass or water to air, it speeds up. Refraction changes how objects look.

Explanation:

The light slows down when it passes from the less dense air into the denser glass or water. This slowing down of the ray of light also causes the ray of light to change direction. It is the change in the speed of the light that causes refraction.

The light slows down when it passes from the less dense air into the denser glass or water. This slowing down of the ray of light also causes the ray of light to change direction. It is the change in the speed of the light that causes refraction.

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Answer:

the last option

Explanation:

Answer:

pressure= force/area

Explanation:

pressure= 0.07/0.0035

             = 20 pascal

Answer:

The kinetic energy of a body is the energy that it possessed due to its motion. Kinetic energy can be defined as the work needed to accelerate an object of a given mass from rest to its stated velocity. Kinetic energy depends upon the velocity and the mass of the body.

Answer:

net force causing acceleration is 120N

Explanation:

Given parameters:

Mass of the object  = 10kg

Acceleration  = 12m/s²

Unknown:

Net force of this acceleration  = ?

Solution:

According to newtons second law of motion;

     Force  = mass x acceleration

Sine the unknown is the net force, input the parameters and solve for it;

   Force  = 10 x 12  = 120N

The net force causing acceleration is 120N

Answer:

Distance, S = 12.8m

Explanation:

Given the following data;

Acceleration = 10

Time = 1.6

Initial velocity = 0

To solve for acceleration, we would use the second equation of motion;

\( S = ut + \frac {1}{2}at^{2}\)

Substituting the values into the equation;

\( S = 0(1.6) + \frac {1}{2}*10*(1.6)^{2}\)

\( S = 5 *2.56\)

Distance, S = 12.8m

Therefore, the height of the building is 12.8 meters.

(a) The cost of electricity for one day is Rs. 42 .

(b) The cost of electricity for the month of January​ is Rs. 1,302.

The electric energy consumed in each is calculated as follows;

E = Pt

E = 60 x 6 = 360 Wh

E(total) = 8 x 360 Wh = 2880 Wh

The cost of Electricity is in kWh

2880 Wh = 2.8 kWh

C = 2.8 kWh x (Rs. 15)/kWh

C = Rs. 42

C = Rs.42 x 31

C = Rs. 1,302

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Answer:

The atom consists of a tiny nucleus surrounded by moving electrons. The nucleus contains protons, which have a positive charge equal in magnitude to the electron's negative charge. The nucleus may also contain neutrons, which have virtually the same mass but no charge.

Explanation: