A train starts from rest. It acquires a speed of 25 m/s after
20 s. The total
distance is
​

The distance travelled by the table of mass 75 kg pushed with a force of 200 N at 20° is 5400 m

W = m g

m = 75 kg

g = 9.8 m / s²

W = 75 * 9.8

W = 735 N

θ = 20°

F = 200 N

Resolving W into its horizontal component,

\(W_{x}\) = W sin θ

\(W_{x}\) = 735 * sin 20°

\(W_{x}\) = 250 N

∑ \(F_{x}\) = m a

F + \(W_{x}\) = m a

200 + 250 = 75 a

a = 450 / 75

a = 6 m / s²

a = v / t

t = 30 s

v = 6 * 30

v = 180 m / s

v = d / t

d = 180 * 30

d = 5400 m

Therefore, the table is 5400 m far away.

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True, Venus is at its greatest distance from Earth during its full phase, it cannot be seen since it is hidden by the Sun.

A planet is a celestial body that meets the following criteria: (a) it orbits the Sun; (b) it has enough mass for its self-gravity to outweigh rigid body forces, assuming a hydrostatic equilibrium shape that is roughly circular; and (c) it has cleared the area in and around its orbit.

These planets resemble stars to the unaided eye. The planets did, however, shift in relation to the stars. They were given the name "wandering stars" as a result. The Greek word planets, which means "wanderer," is where our term "planet" originates.

The planets are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune, listed in order of their distance from the Sun.

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According to Newton’s first law of motion, an object at rest will begin to move, when an unbalanced force acts upon it.

option B is the correct answer.

Newton's first law of motion, also known as the law of inertia, states that an object at rest will remain at rest, and an object in motion will continue in motion with a constant velocity unless acted upon by an external force.

In other words, an object will maintain its state of motion (whether it is at rest or moving in a straight line at a constant speed) unless a force acts upon it.

Thus, according to Newton’s first law of motion, an object at rest will begin to move, when an unbalanced force acts upon it.

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Answer:

its B

Explanation:

Answer:

Nanometer, micrometer, centimeter, decimeter, dekameter, kilometer

Explanation:

Given the following length measurement :

micrometer Kilometer decimeter centimeter nanometer dekameter.

Sorting in increasing order of magnitude from Smallest to Largest.

Expressing in terms of meters :

1 meter = 0.1 decameter

1 meter = 1 × 10^9 nanometer

1 meter = 1 × 10^2 centimeter

1 meter = 1 × 10^1 decimeter

1 meter = 0.001 kilometer

1 meter = 1 × 10^6 micrometers

Hence, arranging from Smallest to Largest :

Nanometer, micrometer, centimeter, decimeter, dekameter, kilometer

Answer:

divide the number of times the event occurs by the length of time.

Explanation:

Answer:

Resource disposal or waste disposal is a crucial aspect of resource management.

Businesses in the manufacturing sector must develop a model of operations that allows an endless loop of internal recycling of waste and or processing waste resources into commercial resources.

A good example would be when an abattoir processes the internal organs of cows and goats with some waste gotten from rice mill into can food for dogs and canines. Waste from this secondary process can either be converted into organic manure to be sold to farmers or processed further for consumption at carnivorous fish farms.

Cheers

Instantaneous impulse and continuous force: these are the foundations of Newton laws. In short explanation; concept of force and mass.

Answer:

Inertia and Force.

If a liquid doesn't absorb visible light, the liquid would appear dark or opaque to us.

The absorption of light, especially visible light, makes an object dark or opaque. To some wavelengths of light, some materials are opaque, but some are transparent to others. Glass, for instance, is opaque to ultraviolet light, but it is transparent to visible light.

Since the liquid does not absorb visible light, to human eyes the liquid would appear dark or opaque. This is because human eyes are only sensitive to visible light. If the dark/opaque liquid actually reflects other lights, we wouldn't know (without the help of technology) since we don't see them.

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The system described by the transfer function G(s) = -co² s² + 2a + w², with a damping ratio of 1.3 and a natural frequency of 0.5, has an overdamped unit step response. So, the correct option is (E)

The transfer function of the system is given as G(s) = -co² s² + 2a + w², where co represents the damping ratio, a represents an arbitrary constant, and w represents the natural frequency of the system. We are given that the natural frequency is 0.5 and the damping ratio is 1.3.

To determine the type of unit step response, we need to analyze the damping ratio (co) in relation to the critical damping value (co_critical).

The critical damping ratio (co_critical) is defined as the value where the system is on the threshold between being overdamped and underdamped. It is given by the formula co_critical = 2 * sqrt(a * w²).

In our case, the natural frequency (w) is 0.5, so we can calculate co_critical as follows: co_critical = 2 * sqrt(a * 0.5²).

Since the damping ratio (co) is given as 1.3, we can compare it with co_critical to determine the type of unit step response.

If co > co_critical, the system is considered overdamped (Option E).

If co = co_critical, the system is considered critically damped (Option D).

If co < co_critical, the system is considered underdamped (Option C).

Based on the given values, we can determine that the system is overdamped (Option E) because the damping ratio (1.3) is greater than the critical damping ratio.

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a) The specific heat at constant pressure of the gas is approximately 0.202 kcal/kg-K.

b) It is not possible to determine the molecular structure of a gas based on its specific heat alone.

Constant pressure refers to a condition in which the pressure of a system remains constant, regardless of changes in the volume or temperature of the system. In thermodynamics, constant pressure is often used as one of the conditions that can be imposed on a system in order to study the relationship between the pressure, volume, and temperature of the system.

In a constant pressure process, the pressure of the system remains the same, and changes in the volume of the system cause changes in the internal energy of the system. For example, in an ideal gas, if the pressure of the gas is kept constant, an increase in the volume of the gas will cause the temperature of the gas to decrease, and a decrease in the volume of the gas will cause the temperature of the gas to increase.

Constant pressure is an important concept in thermodynamics and is used in a variety of applications, including the design of engines and the analysis of energy systems.

a) The specific heat at constant pressure of a gas can be calculated using the equation:

Cp = Cv + R

where Cp is the specific heat at constant pressure, Cv is the specific heat at constant volume, and R is the specific gas constant. The value of R for one mole of gas is typically around 8.31 J/mol-K.

Given that the specific heat at constant volume is 0.182 kcal/kg-K and the molecular mass is 34, we can calculate the specific heat at constant pressure as follows:

Cp = Cv + R

Cp = 0.182 kcal/kg-K + (8.31 J/mol-K / 4184 J/kcal)

Cp = 0.182 + (8.31 / 4184)

Cp = 0.182 + 0.01976

Cp = 0.20176 kcal/kg-K

Therefore, the specific heat at constant pressure of the gas is approximately 0.202 kcal/kg-K.

b) It is not possible to determine the molecular structure of a gas based on its specific heat alone. The specific heat of a gas is a measure of the amount of heat required to raise the temperature of a unit mass of the gas by a certain amount, and it is influenced by the number of atoms in the gas, the type of bonds between the atoms, and the mass of the atoms. To determine the molecular structure of a gas, other methods such as spectroscopy or X-ray crystallography must be used.

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Answer:

4,0kg it is stopped!!!!!

The momentum of the object with a mass of 3 kg and when the object is stopped is zero. There is no momentum taking place.

Momentum is equal to the product of the mass and velocity of the object. Momentum is a vector quantity as it has both magnitude and direction. The unit of momentum is kg.m/s².  Momentum represents the mass of the moving body.

Momentum is represented as the letter p. p = m×v, where m is the mass of the body and v is the velocity of the object. Momentum is directly proportional to the velocity. The velocity of the object is defined as the rate of change of displacement per unit time.

From the given,

mass of the object = 3 kg

the velocity of the object = 0 (when the body is stopped v=0)

the momentum, p = m×v

p = 3×0

   = 0

The linear momentum of the object is zero.

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the answer to this problem is 15

Answer:itts 20 15 is incorrect ill show u proof

Explanation:

when you carry the 2 and add the 3 its Z

The potential differences is ΔV12=V2−V1=0V

ΔV23=V3−V2=5V

ΔV34=V4−V3= 0V

and ΔV41=V1−V4=-5V

From the figure, there is no connection between the points 1 and 4 . Hence, the potential at the points 4 and 3 is same and is equal to zero.

\(\Delta V_{34} & =V_4-V_3 \\& =0\)

Similarly, the potential at the points 1 and 2 is same and is equal to zero.

\(\Delta V_{12} & =V_2-V_1 \\& =0\)

The potential difference between the points 4 and 1 is equal to potential difference between the points 3 and 2.

Given that the potential difference across the points 3 and 2 is,

\(\Delta V_{23} & =V_3-V_2 \\& =5 \mathrm{~V}\)

The potential difference between the points 4 and 1 is also 5V.

\(\Delta V_{41} & =-\Delta V_{23} \quad\left(\because \Delta V_{23}=\Delta V_{14}\right) \\& =-5 \mathrm{~V}\)

Therefore, the required answer is 0,5V, 0,-5V.

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Note:- The correct question could be,

5 V battery with metal wires attached to each end.

The figure shows two wires connected to a battery’s positive and negative terminals. These wires stop short of completing a circuit. Four points are marked on the wires. Point 1 is at the end of the wire connected to the positive terminal. Point 2 is at the negative terminal. Point 3 is at the positive terminal. Point 4 is at the end of the wire connected to the negative terminal.

What are the potential differences ΔV12=V2−V1, ΔV23=V3−V2, ΔV34=V4−V3, and ΔV41=V1−V4?

Enter your answers numerically separated by commas

Satellites are not typically used for cell phone and global positioning signals.

A satellite is an artificial object that is intentionally placed into orbit around a planet, moon or other celestial body. Satellites are typically designed to perform a specific task, such as communication, weather monitoring, scientific research, or navigation.

Satellites are used for global positioning signals (c) and, in some cases, for cell phone signals (a). They are not typically used for AM (b) or FM (d) radio signals, which are generally transmitted via ground-based radio towers.

However, there are some satellite radio services that provide digital radio programming to subscribers, which use satellite communication to deliver their signals.

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Answer:

129.12 ml

Explanation:

If answer is correct feel free to replay me for explanation.

The "Load Capacity" of a jack refers to the greatest weight it can support. Maximum weight of cargo that has been authorised by the country where the vehicle was registered.

We can determine the necessary minimum capacity for a trailer jack by analysing the concentration of loads in a typical trailer.

Thus, the "Load Capacity" of a jack refers to the greatest weight it can support.

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The intensity of the sound you hear at a distance of 280cm away from the tuning fork is 7.72 x 10⁻⁶ W/m².

The power carried by sound waves per unit area in a direction perpendicular to that area.

It is defined as the ratio of power and area.

I = P / 4πr²

Given is the radius 280 cm =  2.8 m and power 7.6 x 10⁻⁴ watt, then the sound intensity is

I =  7.6 x 10⁻⁴ / (4 x 3.14 x 2.8²)

I = 7.72 x 10⁻⁶ W/m²

Thus, the intensity of the sound you hear at a distance of 280cm away fr0om the tuning fork is 7.72 x 10⁻⁶ W/m².

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Elasticity is of significant importance in the everyday lives of businesses and consumers as it helps them understand and respond to changes in prices and demand for goods or services. By considering elasticity, businesses can make informed decisions regarding pricing strategies, production levels, and resource allocation. Consumers, on the other hand, can assess the impact of price changes on their purchasing decisions and adjust their consumption patterns accordingly.

Elasticity, specifically price elasticity of demand, measures the responsiveness of consumer demand to changes in price. It indicates the percentage change in quantity demanded resulting from a one percent change in price. Understanding price elasticity allows businesses to determine how sensitive consumers are to changes in price and adjust their pricing strategies accordingly.

For example, let's consider the market for gasoline. Gasoline is a highly price-sensitive good, meaning that changes in its price have a significant impact on consumer demand. If the price of gasoline increases, consumers may reduce their consumption and seek alternatives such as carpooling or using public transportation. In this scenario, businesses need to consider the price elasticity of gasoline to predict and respond to changes in consumer behavior. They might lower prices to stimulate demand or introduce more fuel-efficient options to cater to price-conscious consumers.

In conclusion, elasticity matters because it provides valuable insights into the dynamics of supply and demand, enabling businesses and consumers to make informed decisions in response to price changes. By understanding elasticity, businesses can adapt their strategies to maintain competitiveness, while consumers can optimize their purchasing choices based on price sensitivity.

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 Option B is the correct answer that show how magnetic field lines should be drawn for the magnets shown in the figure.

The Magnetic Line of Force of a magnet is defined as the line along which a free N - pole would tend to move if placed in the field of a line such that the tangent to it at any point gives the direction of the field at that point.

When the two unlike poles are placed to each other, there will be attraction. And when the two like poles are placed to each other, there will be repulsion. The reason is that the line of force tend to move from the north pole to the south pole.

From the given diagram, the two magnets are of the same south pole. They are of like pole and there will be repulsion between the two magnets.

Therefore, Option B is the correct answer that show how magnetic field lines should be drawn for the magnets shown in the figure.

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Answer: B

Explanation:

I got the question right

Explanation:

A circuit breaker is an automatic switch that cut off current in a circuit when the current become too large. When the current in a circuit increases, the strength of the electromagnet will increase in accordance; this will pull the soft iron armature towards the electromagnet.

Answer:

huh

Explanation:

Explanation:

Speed of sound is 344

The frequency corresponding to the lower cut-off point is the lowest frequency which his 15Hz

F=15Hz

The relationship between the wavelength, speed and frequency is given as

v=fλ

Then,

λ=v/f

λ=v/f

λ=344/15

λ=22.93m

A. the light bulb goes out once the circuit is open since it causes the flow of electricity to cut off. the light bulb dosent get the energy it needs to light up

Explanation:

B. a simple example of this in our every day life is a light switch. when you switch the light on then the circuit is closed and the energy transfers to the light bulb, when u switch the light off then you cut off the lights source of energy which causes the light to turn off.

A substance's physical property is indeed a quality that can be seen or quantified without affecting the substance's identity. Color, density, toughness, boiling and melting points are examples of physical qualities.

Physical characteristics are characteristics that may be seen or quantified without modifying the makeup of the substance. Some examples include the freezing, melting, and boiling points as well as color, hardness, and fragrance.

Physical qualities are those that can be ascertained about a substance without altering its makeup. Physical qualities include traits like critical temperature, boiling point, density, reactivity, color, odor, etc.

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Answer:

Take a Buzzfeed quiz

Explanation:

I doubt finding your spirit animal is easy, so you must consult the infamous website known for random personality quizes, Buzzfeed.

I'm sure there will be many quizes focused on the exploration of spirit animals, and finding yours with accuracy is something Buzzfeed takes pride in, (despite the fact that this is a  comercial buisness with the only intent of making money off of your personality quiz exploits) so your spirit animal should be found with ease.

If Buzzfeed turns out to be unsucsessful,  I recomend just searching up your question online to find countless other resources dedicated to your spirit animal journey.

You could also consult your local witch to see if they know anything about spirit animals.

Answer:

i will tell you how to do it because i've done it before

Explanation:

So to find your spirit animal you don't choose it. It chooses you. To find yours it can be in your dreams, daydreams. Look into your concious. In your dreams look at the animals to see if there is anything unusal about them that is out of the ordinary. It will show itself to you in ways you might not realize. If you do see an animal out of the ordinary, inspect it, try asking it something, because if it shows itself to you that means it is willing to guide you. Thats what your spirit animal is for.

Antonio will need a pipette to measure 15 ml of distilled water in a laboratory.

A pipette is a laboratory equipment used in measuring liquids in little amounts. 15 ml is a small amount of liquid so a pipette is a better fit for such amount.

We can conclude that a pipette is a better instrument to measure 15 ml of distilled water.

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