How high would you have to lift a 1000kg car to give it a potential energy of:

(a) 2.0 x 103 J (b) 2.0 x 105 J (c) 1.0 kJ

Given

m = 1g

Lvap = 2260 j/g

p = 1.01 x 10^5 Pa = 1 Atm

T = 100 C = 373 K

Vsteam = 1671 cm3

Vwater = 1 cm3

ΔV = (Vsteam - Vwater) = 1671 - 1 = 1670 cm3

Procedure

a) External work done by the system

Q = mL

W = pΔV

External word done by the system is 169 J

b) increase in internal energy

ΔU = Q - W

Increase in the internal energy is 2091 J

Answer:

0.9m/s^2 (yours is 0.87, so choose that)

Explanation:

formula for centripetal acceleration:

v^2/r

to find v, we know that f=1/90s, and r=180m.

v=(2pir)/T

v=(2pi(180))/90

v=12.6m/s

now plug into a=v^2/r

a=(12.6)^2/180

a=0.9m/s^2

For maximum power generation, it is ideal if the water rebounds off of the turbine blades. If the water bounces back, it has undergone a greater shift in momentum than if it had simply stopped. Additionally, the blades will spin quicker if there is a greater momentum change for the water than there is for the blades.

The momentum of a body's center of mass can only be changed by the application of an external force, according to the laws of motion. However, due to the force of friction created by the car's tires in contact with the ground, it can be accelerated by applying an internal engine force.

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Answer:

The distance of the light is 9.4608 x 10^25 m

Explanation:

Time taken by the light = 10 billion years = 10 x 10^9 years

speed of light = 3 x 10^8 m/s

speed of light in m/years is = (3 x 10^8)/(60 x 60 x 24 x 365) = 9.4608 x 10^15 m/year

distance = speed x time

therefore, the distance of this light = 10 x 10^9 x 9.461 x 10^15 = 9.4608 x 10^25 m

Answer:  

more than 10 billion light years due to expansion of space

Explanation:

Given the following information:Mass of the system, m = 20 kg.Damping coefficient, b = 6 Ns/m.Force, F = 90 N.Frequency of applied force, f = ?Applied force angular frequency, w = 6 rad/s.Forced vibration equation:F(t) = F0 sin(wt)where F0 = 90 N and w = 6 rad/s.Under the action of the force F, the mass m will oscillate.The equation of motion for the mass-spring-damper system is given by:$$\mathrm{m\frac{d^{2}x}{dt^{2}}} + \mathrm{b\frac{dx}{dt}} + \mathrm{kx = F_{0}sin(\omega t)}$$where k is the spring constant.x(0) = 0 and x'(0) = 0.As we have the damping coefficient (b), we can calculate the damping ratio (ζ) and natural frequency (ωn) of the system.Damping ratio:$$\mathrm{\zeta = \frac{b}{2\sqrt{km}}}$$where k is the spring constant and m is the mass of the system.Natural frequency:$$\mathrm{\omega_{n} = \sqrt{\frac{k}{m}}}$$where k is the spring constant and m is the mass of the system.Resonant frequency:$$\mathrm{\omega_{d} = \sqrt{\omega_{n}^{2}-\zeta^{2}\omega_{n}^{2}}}$$At resonance, the amplitude of the system will be maximum when forced by a sinusoidal force of frequency equal to the resonant frequency.Resonant frequency:$$\mathrm{\omega_{d} = \sqrt{\omega_{n}^{2}-\zeta^{2}\omega_{n}^{2}}}$$$$\mathrm{\omega_{d} = \sqrt{(6.57)^{2}-(-2.88)^{2}} = 6.98 rad/s}$$Hence, the frequency of applied force at which resonance will occur is 6.98 rad/s.

The frequency of the applied force at which resonance will occur is ω = 2√5 rad/s.

To determine the frequency of the applied force at which resonance will occur, resonance happens when the frequency of the applied force matches the natural frequency of the system. The natural frequency can be determined using the formula:

ωn = √(K / M),

where ωn is the natural frequency, K is the spring constant, and M is the mass of the system.

Substituting the given values of K = 400 N/m and M = 20 kg into the equation, we can calculate the natural frequency ωn.

ωn = √(400 N/m / 20 kg) = √(20 rad/s²) = 2√5 rad/s.

Therefore, the frequency of the applied force at which resonance will occur is ω = 2√5 rad/s.

The correct question is given as,

M= 20kg

Fo = 90 N

ω = 6 rad/s

K = 400 N/m

C = 125 Ns/m

Determine the frequency of applied force at which resonance will occur?

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Answer:

The acceleration of a boat if the resultant force on it is 4000 N and its mass is 1240 kg is 3.2 m/s².

Explanation:

Given

To determine

Acceleration a = ?

Important Tip:

Using the formula

\(F = ma\)

where

now substituting F = 4000, m = 1240 in the formula

\(F = ma\)

\(4000\:=\:1240\:\times a\)

Switch sides

\(1240a=4000\)

Divide both sides by 1240

\(\frac{1240a}{1240}=\frac{4000}{1240}\)

Simplify

\(a=\frac{100}{31}\)

\(a=3.2\) m/s²

Therefore, the acceleration of a boat if the resultant force on it is 4000 N and its mass is 1240 kg is 3.2 m/s².

The load of the pickup truck spills due to an unbalanced force acting on it caused by the collision from the car.

Newton's first law states that an object at rest will remain at rest unless acted upon by an unbalanced force. In this scenario, the load of the pickup truck is at rest in the back of the truck, but when the car rear-ends the pickup truck, it applies an unbalanced force on the load, causing it to spill out of the truck.

Newton's second law states that the force applied on an object is equal to the mass of the object multiplied by its acceleration. In this scenario, the car applies a force on the load of the pickup truck, which is equal to the mass of the load multiplied by the acceleration of the car at the time of the collision. The force causes the load to spill out of the truck.

Newton's third law states that for every action, there is an equal and opposite reaction. In this scenario, when the car rear-ends the pickup truck, the car experiences an equal and opposite force, which is the reaction to the force it applies to the load of the pickup truck.

In summary, the load of the pickup truck spills due to an unbalanced force acting on it caused by the collision from the car. The force applied on the load of the pickup truck is equal to the mass of the load multiplied by the acceleration of the car at the time of the collision. And the car experiences an equal and opposite force, which is the reaction to the force it applies to the load of the pickup truck.

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Answer:

speed = 40 m/s

Explanation:

speed = frequency x wavelength

speed = 10 Hz x 4 m

speed = 40 m/s

Answer: Babies inherit their eye color through the combination of genes they receive from their parents. Genes, which are located on chromosomes, determine a specific trait, such as eye color. Each gene has two alleles, one from each parent, and the dominant allele will determine the phenotype, or the observable physical characteristics, of the trait. If a baby inherits a dominant allele for brown eyes and a recessive allele for blue eyes, the brown allele will be expressed, resulting in brown eyes. The combination of alleles a baby inherits is called their genotype. If a baby inherits two identical alleles for a trait, they are said to be homozygous for that trait, while if they inherit two different alleles, they are heterozygous. The dominant allele is expressed over the recessive allele in heterozygous individuals, resulting in a phenotype that reflects the dominant allele.

Explanation:

The mechanical advantage of a pulley is the ratio of the output force to the input force.

For example, if a pulley is used to lift a weight of 100 pounds, and the input force is 10 pounds, then the mechanical advantage is 10:1 (100/10).

This means that for every 10 pounds of input force, the pulley can lift 100 pounds of weight. The mechanical advantage of a pulley is determined by the number of strands of rope that are used in the pulley system. The more strands of rope, the higher the mechanical advantage will be.

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Proton will undergoes the lesser acceleration

Due to the opposite polarity of an electron and a proton, when they are in an electric field, they are attracted to one another by an electrical force of equal strength. However, because of their opposing charges, the force's direction will be the opposite.

An electron will accelerate more quickly than a proton because of the difference in mass between the two particles.

Thus, the electric forces acting on them will be equal in strength but directed in the opposite direction. Since the mass of the proton is 1836 times greater than the mass of the electron, its acceleration will be [1/1836] times greater.

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If the resistance remains constant and the voltage doubles, the power will increase by a factor of 4 (option E)

The following data were obtained from the question:

P = V² / R

Resistance is constant, we have

V₁² / P₁ = V₂² / P₂

V² / P = (2V)² / P₂

V² / P = 4V² / P₂

Cross multiply

V² × P₂ = P × 4V²

Divide both side by V²

P₂ = P × 4V² / V²

P₂ = P × 4

From the above, we can conclude that the power will increase by a factor of 4 (option E)

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Answer:

Explanation:

According to newtons second law, Force = mass* acceleration.

Given

Force = 1930 N

Mass of pumpkin = 2 kg

Required

Acceleration of the pumpkin

From the formula;

acceleration = Force/mass

acceleration = 1930/2

acceleration = 965m/s²

Hence  the acceleration of a 2kg pumpkin if launched by a force of 1930 N is 965m/s²

Sunspots appear dark because they have lower temperatures compared to the surrounding areas on the Sun's surface. This cooler temperature is caused by intense magnetic activity that inhibits.

The flow of heat from the Sun's interior to the surface. As a result, the temperature within sunspots can be thousands of degrees cooler than the rest of the Sun's surface, which makes them appear darker. Sunspots are also associated with strong magnetic fields that can cause solar flares and other forms of space weather that can affect Earth. Scientists study sunspots to better understand the behavior of the Sun and how it impacts our planet. The study of sunspots is important for space weather prediction and for understanding the Sun's influence on our climate and atmosphere.

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Answer:

D

Explanation:

Trees are obviously effected from deforestation.

Pollution effects the things trees need to grow (water, air).

Reduction removes parts of the tree, some parts being needed.

Answer: D

Explanation:Trees are obviously effected from deforestation.

Pollution effects the things trees need to grow (water, air).

Reduction removes parts of the tree, some parts being needed.

Answer:

Some of the effects of a dam on the environment includes;

1) Increase in the amount of the greenhouse gases

2) Removal of the natural wetland and ocean carbon sinks

3) Disruption of the sources of nutrients in the ecosystem

4) Destruction of habitats

5) Raising of the sea levels and waste waters

6) Displace villages and communities

7) Dams have a potential to create flood risk

8) Dams lead to increased water loss due to evaporation and transpiration

9) Dams causes earthquakes

Explanation:

Dams are a source of renewable energy and are a means to prevent floods, however, dams can also have detrimental impact on the climate and the environment.

Answer:

b

Explanation:

because electromagnetic waves can travel in vacuum as they don't require particles to transfer energy from one point to another. they can also travel through mediums such as the wall or air, if not how do radio waves transfer energy in this hyper advanced world? through the air

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The other response gave a description of the kinetic energy from flowing liquids. However, the energy or liquid at rest is not empty. the same concept as the potential energy underlying solids. Both can be converted into kinetic energy.

An object's kinetic energy is the power it has as a result of motion. It is described as the effort required to move a mass-based body from rest to the indicated velocity. The body holds onto the kinetic energy it acquired during its acceleration, unless its speed changes.

The idea of kinetic energy was first proposed in 1849 by William Thompson, later known as Lord Kelvin. We now relate the idea of an object's kinetic energy with the quantity of one half of its mass multiplied by its velocity squared.

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The value of tetha (θ) in which the resultant force will  have a maximum value is 180 degrees.

The maximum value of the resultant vector is calculated by applying Parallelogram law of vector addition as shown below;

R² = a²  +  b²   -  2ab( cosθ )

where;

when θ is 0, the vector will have a minimum value, when θ = 180, the vector will have a maximum value as shown below.

R² = a²  +  b²   -  2ab( cosθ )

R²  = ( 250² ) + ( 150² ) -  2(250 x 150 ) x cos (180)

R² = 160,000

R = √ (160,000)

R = 400 N

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If you are referring to the book "Fahrenheit 451" by Ray Bradbury, then the author describes a dystopian society in which books are banned and burned by the government. In the book, the reasons for the ban are not explicitly stated, but it is suggested that the government banned books to control and manipulate the thoughts and actions of the population.

However, if you are referring to a different book by an author named Beatty, please provide more context so I can provide an accurate answer.

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The bandwidth of the periodic composite signal is drawn as a range between 100 Hz and 2100 Hz , The data rates for sending a digital signal using one harmonic, three harmonics, and five harmonics on a TV channel with a 6 MHz bandwidth would be 6 MHz, 18 MHz, and 30 MHz .

For the first question

Draw the bandwidth of a periodic composite signal, we need to consider the highest frequency component present in the signal.

We have two sine waves one with a frequency of 100 Hz and the other unspecified. Since the bandwidth is given as 2000 Hz, we can assume that the second sine wave has a frequency of 2100 Hz (2000 Hz above the first sine wave frequency).

Draw the bandwidth, we can create a graph with frequency on the x-axis and amplitude on the y-axis.

We plot the amplitude values for the two sine waves at their respective frequencies (100 Hz and 2100 Hz). The bandwidth will be the range between these two frequencies on the x-axis.

For the second question

The data rate for a digital signal transmitted using one harmonic, three harmonics, and five harmonics can be calculated by multiplying the channel bandwidth by the number of harmonics used. Since the bandwidth is given as 6 MHz, the data rates would be as follows:

One harmonic: 6 MHz

Three harmonics: 18 MHz

Five harmonics: 30 MHz

The data rate increases with the number of harmonics used because each harmonic contributes additional information to the signal, allowing for a higher data transmission rate.

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answer of the question is into the picture ️

Answer:

256

Explanation:

This suggests the percentage of those who come lower back on your blog each and every week after their first visit.

As an example, if this week you had one hundred human beings go to your blog and inside the week one column, it suggests seventeen percent. which means of the initial a hundred human beings, seventeen got here returned. underneath week two in case you see eight percent, that means of the preliminary a hundred human beings, eight humans came lower back in two weeks.

This quantity will keep getting smaller, but the goal is to get humans back as often as viable. That increases belief, social shares, and the capability of people to link to you, and it even will increase the odds that the vacationer will convert right into a customer. The Pageviews column tells you ways generally each individual blog published was regarded in the decided on time-frame. The specific Pageviews column simply to the right of it tells you ways a lot of those pageviews were from precise visitors

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Answer:

See below

Explanation:

So the magnets poles are opposed and the magnets REPEL each other

Answer:

Time = 0.3256 sec

Explanation:

Velocity = displacement / time

43=14/t

So the time =14/43

t=0.3256 sec

Answer:

I think B but I could be wrong

Explanation: