how long will it take a 3250- w motor to lift a 425- kg piano to a sixth-story window 15.0 m above?

Normally, materials are electrically neutral because there are equal numbers of positively charged particles and negatively charged particles, hence option D is correct.

Since there are exactly as many electrons in an atom as there are protons, the positive and negative charges "balance out," leaving atoms electrically neutral.

Neutrons are found in the nuclei of all atoms, with the exception of the majority of hydrogen atoms. Neutrons are electrically neutral, as opposed to electrically charged protons and electrons.

Therefore, due to having an equal number of positively charged particles and negatively charged particles materials are electrically neutral.

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Answer:

i think its possible yes

Explanation:

Answer:

See below

Explanation:

A ) distance = 1/2 a t^2    <==== when starting from rest

          20    = 1/2 (a) (3.5^2)      shows a = 3.27 m/s^2

B)   Velocity(at 3.5 s)   =   a t   = 3.27 * 3.5 = 11.42 m/s

C)    3.5 seconds      +    80 m / 11.42 m/s = 10.5 s

When two objects of different masses are subjected to a force of the same strength, the one with less mass will experience a higher change in velocity.

Each object pulls the other when two objects come into contact. Imagine using a bat to strike a softball. The ball is pushed away by the bat when it collides with it. The bat experiences force from the ball as well.

Even if two colliding objects have masses that are very different from one another, they will nevertheless exert equal forces on one another. An object always experiences an impetus and a shift in momentum during a collision. The impulse that an object encounters during a collision is equal to its variation in speed.

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Answer:

5m/sec square

Explanation:

because F=M×A

A=F/M

.............................

Answer:

5m/sec square

Explanation:

because force = mass x acceleration

A=F/M

Answer:

5.6 volts

Explanation:

According to Ohm's Law, V = IR

where V = voltage, I = Current and R = resistance

A particular organic molecule forms an electric dipole by possessing an effective charge separation of at least two unlike charges of equal magnitude.

These charges are separated by a distance between them, known as the dipole moment, which creates a dipole. In the case of organic molecules, the most common source of charge separation is an unequal distribution of electrons caused by the molecular structure. For instance, if a molecule has two different atoms linked by a covalent bond, and the atoms have different electronegativities, the molecule's electrons will tend to be closer to the more electronegative atom. This would generate a partial negative charge near that atom and a partial positive charge near the other atom, leading to a dipole moment and an electric dipole. An organic molecule that has an effective charge separation and an electric dipole moment can interact with an electric field. An electric field is a vector quantity that describes the force that an electric charge experiences when placed in that field. In the case of a dipole, it will experience a torque when placed in an electric field that is not aligned with the dipole. The torque will tend to align the dipole with the electric field. This phenomenon is used in many chemical and biological systems, for example, the way that our sense of smell works is based on the interaction of odorant molecules with specific receptors in our nasal cavity. The odorant molecules are generally organic compounds that possess electric dipoles. When they reach the olfactory receptors, they interact with them and create a nerve impulse that our brain interprets as a particular scent.

In conclusion, a particular organic molecule forms an electric dipole by having an effective charge separation of at least two unlike charges of equal magnitude. The dipole moment is the distance between the two unlike charges. Electric fields interact with electric dipoles, and the dipoles experience a torque that aligns them with the field. The interaction of odorant molecules with olfactory receptors is one example of how the dipole moment is used in biological systems.

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Answer:

it lets out the air inside the balloon and I´m pretty sure it would hit the wall while the air was being let out.

Answer:

A heterogenous mixture.

Explanation:

If you added sand to your coffee, the kind of mixture your coffee would now

be is a heterogenous mixture.

A heterogenous mixture can be defined as any mixture which has a different or non-uniform composition and properties throughout any given sample of the mixture. This ultimately implies that, the constituents of a heterogenous mixture always remain separate in the sample and as such comprises of two or more phases.

Hence, a mixture of sand and coffee is simply a heterogenous mixture and can easily be separated into their various components.

Answer:

the molecules form new chemical bonds

Explanation:

The circumstance which will not occur when water undergoes a physical change is that the molecules form new chemical bonds. Thus, the correct option for this question is B.

Physical change may be defined as a type of change within the compound or things that significantly do not change the chemical properties of the matter. It usually involves the process of transition from one state to another.

When water undergoes a physical change means liquid to solid, solid to liquid, or gas, the motion of the molecules, kinetic energy, and density alter with respect to the state of matter. So, all these attributes are classified into the category of physical change.

Therefore, the molecules forming new chemical bonds is the option that will not occur at any point in time when water undergoes a physical change. Thus, the correct option for this question is B.

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SWOT Analysis Strengths- Paley’s Products has a low overhead cost with the company operating at a high level of efficiency, resulting in competitive pricing.- They have a team of experienced employees who have worked in the industry for several years.- They have a variety of products in the portfolio that can satisfy customers from different sectors.- They are reputable and have a loyal customer base.Weaknesses- They have been slow to adopt new technology, and this may be a disadvantage to the company.- Limited marketing and sales promotion are affecting their sales revenue.-

They depend on a few key customers for the bulk of their sales revenue, leaving them vulnerable to market changes.Opportunities- Expansion of the product line to include unique products.- The establishment of strategic partnerships with other businesses in the industry.- Exploration of new markets, such as international markets.- Improvement of marketing techniques to increase brand awareness.Threats- Changes in consumer preferences towards environmentally friendly products.- Increase in competition from other businesses in the industry.- Fluctuating market prices for raw materials that may lead to price increases.

Strategic Actions to be taken by Paley Products1. Development of an E-commerce platform to allow online transactions with customers. The E-commerce platform will enable Paley to reach a wider customer base, expand its reach, and increase sales revenue.2. Investment in the research and development of new environmentally friendly products. Paley will remain competitive and cater to the needs of consumers who prefer green products.3. Establishment of strategic partnerships with other businesses in the industry to leverage the strength of other companies in the industry and to develop new products or increase market share.4. Improvement of marketing techniques to increase brand awareness and improve visibility. A marketing strategy that incorporates social media and other digital channels can help promote the brand to potential customers.5. Expansion into international markets. This will enable Paley to diversify its customer base and generate more revenue. Paley can start by targeting nearby countries, then expand globally as they gain more experience and financial stability.

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It's important to note that the time required for bed accumulation can vary greatly depending on the specific depositional setting and the geological context. Therefore, while thick beds generally suggest longer deposition periods, the exact relationship between bed thickness and time can be influenced by a range of geological factors.

The time required for the accumulation of sedimentary beds, whether thick or thin, can vary depending on various factors. Thick beds generally represent a longer period of sediment deposition compared to thin beds or laminations. This is because thick beds typically result from the continuous or episodic deposition of sediment over an extended period of time, whereas thin beds or laminations may form more rapidly or in a shorter time span.

The formation of thick beds can be influenced by factors such as sediment supply, depositional environment, and sedimentation rates. For example, in environments with high sediment input, such as river deltas or turbidite systems, thick beds may accumulate relatively quickly due to the large volume of sediment being transported and deposited.

On the other hand, thin beds or laminations often result from more rapid or intermittent sedimentation processes. These thinner layers can be associated with processes like periodic flooding events, storm deposition, or the settling of fine-grained sediments in calm environments.

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a.

9.8 m/s^2

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josh207

Ambitious

17 answers

2.3K people

The answer is 9.8 ms^-2, because there is only one force acting on the object so the acceleration will be numerically equal to the gravitational field strength.

b.

gravity = 9.8 m/s^2

2.47 * 9.8 = 24.206 N

Electric vehicle have to achieve the same amount of momentum as the rocky is 41.78 m/s.

We are given that,

Mass of mountain = M = 61000kg

velocity = V = 0.5m/s

As momentum is defined as the sum of an object's mass and velocity, it is represented as p=mv, where p stands for momentum, m for mass, and v for velocity.

According to the law of conservation of linear momentum, the starting and final momentum should add up to the same amount. As a result, in this instance, MV=mu, where M and m represent the masses of 61 000 kg and 730 kg, respectively, while v and u are the velocities of the masses.

u = MV/m

Putting the values from the above we get,

u = (61000kg)(0.5m/s)/730kg

u = 41.78 m/s

Therefore, Electric vehicle have to achieve the same amount of momentum as the rocky would be 41.78 m/s.

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Answer:

This is because a thermometer is designed to measure the temperature of a substance.

Explanation:

A thermometer is a device which is used to measure the temperature of a body which is known as the measure of the degree of the hotness or coldness of a body.

Temperature is measured in degree Celsius or Kelvin and it is entirely different from thermal energy which is measured in Joules.

The materials of thermometer that are designed to measure temperature only. Therefore, it is not possible to measure thermal energy.

Thermal Energy of a system is defined as the total kinetic energy possessed by the system. And temperature of a system is termed as the measure of average of kinetic energy of particles within the system.

Temperature is generally measured by Thermometers. And it is not possible to measure thermal energy due to following reasons:

Thus, thermometers are only used for the purpose of measuring temperatures, rather than thermal energy due to its design specifications.

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Answer:

The higher the amplitude, the higher the energy. To summarise, waves carry energy. The amount of energy they carry is related to their frequency and their amplitude. The higher the frequency, the more energy, and the higher the amplitude, the more energy.

Answer:

zero work is done by the worker

The explanation about "red balloon will move forward in an accelerating car"  is given below:

Acceleration is a vector quantity that describes the rate at which an object changes its velocity. It is the rate at which the velocity of an object changes in magnitude or direction, or both. In other words, it tells us how quickly an object is speeding up or slowing down. Acceleration has units of meter per second squared (m/s²) and its direction is the same as the direction of the change in velocity.

Bill Nye's claim that an inflated red balloon will move forward in an accelerating car.

And it can be understood through the principles of motion.

When a car is accelerating, its velocity changes, and this creates a force called the "inertial force" that acts in the opposite direction of the acceleration. This force is also referred to as the "fictitious force" or the "centrifugal force."

Hence, the inflated red balloon does move forward in an accelerating car.

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The effective resistance between a and b is determined as R/6.

The effective resistance between a and b is calculated from the total resistance of the parallel circuit.

1/Re = 1/R₁ + 1/R₂ + 1/R₃

where;

The effective resistance between a and b is calculated as follows;

1/Re = 1/R + 1/R + 1/R

1/Re = (1 + 1 + 1) /R

1/Re = 3/R

Re = R/3

The effective resistance between a and b is = R/3  x ¹/₂ = R/6

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Answer:

Sand,Mud

Explanation:

Sugar and salt are examples of soluble substances. Substances that do not dissolve in water are called insoluble. Sand and flour are examples of insoluble substances.

Answer:

Two objects are moving in opposite direction on a straight line. After collision, they stick together and move with common velocity

The total momentum of a colliding system is constant always. Therefore, by using this concept, the final velocity of the coupled mass will be 3.7 m/s.

Momentum of an object is the ability of an object to bring the force applied to make a maximum displacement. It is the product of its mass and velocity. Momentum is a vector quantity. It have both magnitude and direction.

The momentum in a collision is conserved. Thus total initial momentum is equal to the final momentum. Let m1 and m2 be the colliding masses and the u and v be the initial and final velocity.

Then, m1 u1 + m2u2 = (m1 + m2)v for a coupled mass after collision.

then final velocity v =  ( m1 u1 + m2u2 )/ (m1 + m2)

Apply the given values in the equation as follows:

v = (0.25 kg ×3.4m/s + 0.45 kg× 3.9 m/s)) (0.45 + 0.25) = 3.7 m/s

Therefore, the final velocity of the coupled masses after collision is  3.7 m/s.

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Answer:

A Both physical and chemical changes.

Explanation:

From the analysis, it can be concluded that planet A has the strongest gravitational field, followed by planet C, and planets B and D have the same gravitational field strength.

The gravitational force acting on various masses is measured on different planets. The table shows the measured values for the forces acting on the corresponding masses:Planet Force (N) Mass (kg)A 8.0 0.50B 30 3.0C 45 3.0D 60 6.0

Method for comparing the gravitational field strengths on the different planets:First, we can use the formula for calculating gravitational force: \(`F = G (m_1m_2 / r^2)`\)where G is the universal gravitational constant `\(6.67 * 10^{-11 }Nm^2/kg^2\), m1 and m2 are the masses of the two objects in kg, and r is the distance between the centers of the objects in meters.

We know that the force is proportional to mass (F = ma). So we can calculate the acceleration due to gravity (g) on each planet by dividing the force by the mass. Therefore, we can use the formula: `g = F / m`.

Comparing the gravitational field strengths on the different planets:We will calculate the acceleration due to gravity (g) on each planet.

For planet A: `

g = F / m

= 8.0 N / 0.50 kg

= 16 \(m/s^2\)`

For planet B: `g = F / m

= 30 N / 3.0 kg

= 10 \(m/s^2\)

For planet C: `g = F / m

= 45 N / 3.0 kg

= 15 \(m/s^2\)

For planet D: `g = F / m

= 60 N / 6.0 kg

= 10 \(m/s^2\)

`So we see that planet A has the strongest gravitational field, followed by planet C, then planet B and planet D have the same gravitational field strength.

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It takes approximately 49.22 seconds for the skydiver to fall 5000m.

To determine the time of a 5000m fall, we need to solve the given differential equation for y with the provided values of g, c₋D, and m.

The differential equation is:

dy/dt = g - c₋D/m * y²

To find the time it takes to fall 5000m, we can set up the integral:

∫(1/(g - c₋D/m * y²)) dy = ∫dt

Integrating both sides:

∫(1/(g - c₋D/m * y²)) dy = ∫dt

Let's first rewrite the differential equation with the given values:

dy/dt = 9.80665 - (0.2028 / 80) * y²

Now, integrate both sides:

∫(1 / (9.80665 - (0.2028 / 80) * y²)) dy = ∫dt

To solve the integral on the left side, we can use a trigonometric substitution. Let's make the substitution:

u = √((0.2028 / 80) * y²)

Then, du = √((0.2028 / 80)) * 2y dy

Now, our integral becomes:

∫(1 / (9.80665 - u²)) * (1 / √((0.2028 / 80))) * du = ∫dt

Simplifying:

∫(1 / (9.80665 - u²)) * (1 / √((0.2028 / 80))) * du = ∫dt

Now, let A be a constant given by:

A = 1 / √((0.2028 / 80))

Our integral becomes:

∫(A / (9.80665 - u²)) du = ∫dt

Using partial fractions, we can express the integrand as:

A * [1 / (2 * √(9.80665))] * [(1 / (u + √9.80665)) - (1 / (u - √9.80665))]

Integrating the above expression:

(A * [1 / (2 * √(9.80665))] * [ln|u + √9.80665| - ln|u - √9.80665|]) + C

Now, replace u with √((0.2028 / 80) * y²):

(A * [1 / (2 * √(9.80665))] * [ln|√((0.2028 / 80) * y²) + √9.80665| - ln|√((0.2028 / 80) * y²) - √9.80665|]) + C

Now, we can plug back in u and solve for t:

t + C = (A * [1 / (2 * √(9.80665))] * [ln|√((0.2028 / 80) * y²) + √9.80665| - ln|√((0.2028 / 80) * y²) - √9.80665|])

Now, let's apply the initial condition y = 0 when t = 0:

0 + C = (A * [1 / (2 * √(9.80665))] * [ln|√((0.2028 / 80) * 0²) + √9.80665| - ln|√((0.2028 / 80) * 0²) - √9.80665|])

Simplifying, we get:

C = (A * [1 / (2 * √(9.80665))] * [ln|√9.80665| - ln|√9.80665|])

The term ln|√9.80665| - ln|√9.80665| evaluates to 0, so C = 0.

Now, we can solve for t when y = 5000m:

t = (A * [1 / (2 * √(9.80665))] * [ln|√((0.2028 / 80) * (5000²)) + √9.80665| - ln|√((0.2028 / 80) * (5000²)) - √9.80665|])

Plugging in the values of A, g, c₋D, and m:

t = ([1 / √((0.2028 / 80))] * [1 / (2 * √(9.80665))] * [ln|√((0.2028 / 80) * (5000²)) + √9.80665| - ln|√((0.2028 / 80) * (5000²)) - √9.80665|])

Simplifying:

t = ([1 / √0.002535] * [1 / (2 * √9.80665)] * [ln|√(0.002535 * 25000000) + √9.80665| - ln|√(0.002535 * 25000000) - √9.80665|])

Using a calculator, we can evaluate the expression:

t ≈ 49.22 seconds

Therefore, it takes approximately 49.22 seconds for the skydiver to fall 5000m.

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A skydiver of mass m in a vertical free fall experiences an aerodynamic drag force F_D= c_Dy^2,

where y is measured downward from the start of the fall. The differential equation describing the fall is

y = g - c_D/m*y^2

Determine the time of a 5000m fall. Use g = 9.80665m/s^2, C_D=0.2028kg/m, and m = 80kg.

Answer:

The British were determined to crush the rebellion.

They were criminals and made achieving independence more difficult.

Explanation:

Mau-mau were rebellions and wanted to push out British and other Europeans out of Kenya. Mau mau were also the members of the Kikuyu and were making independence more difficult, due to their rebellion attitude. They were a secret society of Kikuyu.

2) The British were determined to crush the rebellion.

3) They were criminals and made achieving independence more difficult.

After British victory in World War II, Kenyatta received a request to return to Kenya in September 1946, sailing back that month. He decided not to bring Edna—who was pregnant with a second child —with him, aware that if they joined him in Kenya their lives would be made very difficult by the colony's racial laws. On his arrival in Mombasa, Kenyatta was greeted by his first wife, Grace Wahu and their children. He built a bungalow at Gatundu, near to where he was born, and began farming his 32-acre estate.

(a) The British were determined to crush the rebellion.

(b) They were criminals and made achieving independence more difficult.

Mau-mau were rebellions and wanted to push out British and other Europeans out of Kenya. Mau mau were also the members of the Kikuyu and were making independence more difficult, due to their rebellion attitude. They were a secret society of Kikuyu.

2) The British were determined to crush the rebellion.

3) They were criminals and made achieving independence more difficult.

After British victory in World War II, Kenyatta received a request to return to Kenya in September 1946, sailing back that month. He decided not to bring Edna—who was pregnant with a second child —with him, aware that if they joined him in Kenya their lives would be made very difficult by the colony's racial laws.

On his arrival in Mombasa, Kenyatta was greeted by his first wife, Grace Wahu and their children. He built a bungalow at Gatun, near to where he was born, and began farming his 32-acre estate.

Thus the British were determined to crush the rebellion.They were criminals and made achieving independence more difficult.

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a) The force diagram of the block and all the forces are in the image attached.

(b) The weight of the block and its parallel component is  98.1 N and 33.55 N respectively.

(c) The applied force on the block is 52.75 N

(a) The force diagram of the block include, the parallel and pedicular component, as well as friction force.

(b) The weight of the block and its parallel component is calculated as;

Fg = mg

where;

Fg = 10 kg x 9.81 m/s²

Fg = 98.1 N

Fgₓ = mgsinθ

Fgₓ = 98.1 N x sin(20)

Fgₓ = 33.55 N

(c) The applied force on the block is calculated as follows;

F - Fgₓ - μFgcosθ = ma

where;

μ = a/g

μ = 1 / 9.81 = 0.1

F - 33.55 - 0.1(98.1 x cos20) = 10 x 1

F - 33.55 - 9.2 = 10

F = 10 + 33.55 + 9.2

F = 52.75 N

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A body of a certain mass could become weightless in the following two conditions:

1. In microgravity

2. In neutral buoyancy

Cheers,

qxxi

Answer:

Option - d This is trick question, since the solar constant never change. The gravity of the Sun keeps the planets in their orbits at all times. They stay in their orbits, since there is no other force in the Solar System which can stop them. Yeah this might help. Add to brainliest please