an object with a mass of 130kg is falling in air and experinces a force due to air resistance of 390 n what is the net force

In other words, net work is the work produced by the net external force Fnet. Net work is defined as the total amount of work produced by all external forces. This may be expressed mathematically as Wnet=Fnetdcos where.

The word "force" has a very specific sense. At this level, the phrases "push" and "pull" are entirely suitable to describe forces. The second object exerts force on the first. A force can be thought of as consisting of both living and non-living entities.

Different categories of forces are denoted by the phrases "contact forces" and "non-forces." There are many different types of forces, including the nuclear force, gravitational force, frictional force, magnetic force, electrostatic force, and spring force.

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The independent variable, the one that is intentionally manipulated, is whether or not the car hits the barrier.The dependent variable, the one that you measure the response in, is the distance that the washers travel.

The independent variable in an experiment is the variable that is manipulated by the researcher. It is the variable that is intentionally changed by the researcher to examine the impact of this change on the dependent variable.The dependent variable, on the other hand, is the response that is measured by the researcher.

It is the variable that is being influenced by the independent variable in an experiment. Thus, in the given experiment, the car's hitting the barrier is the independent variable while the distance that the washers travel is the dependent variable.

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Answer:

sound is the answer, I'm not sure why I'd think it was because it creates a vacuum

Answer:

sound

Explanation:

Sound travels as waves of energy, but, unlike light, the waves transmit energy by changing the motion of particles.

Answer:

Explanation: the average kinetic energy of the molecules in a pot of water when heated on a stove will go up or increase according to the kinetic theory of heat. The kinetic theory of heat correlates an increase in temperature with the increase of kinetic energy, therefore, if temperature increases, so will the kinetic energy.

Answer:

The molecules go faster.

Explanation:

The hotter the water is the moer faster the water molecules go.

The atmosphere on Mars has a low air pressure and is mostly composed of carbon dioxide. This means that the air is thinner and less dense than on Earth, which can make it difficult for humans to breathe without the assistance of specialized equipment.

Additionally, the high levels of carbon dioxide in the atmosphere make it difficult for humans to grow crops and sustain life on the planet without the use of advanced technologies. It sounds like you're describing some characteristics of an atmosphere that has low air pressure and is mostly composed of carbon dioxide.

Here's an explanation using the terms you provided: An atmosphere with low air pressure typically has a lower density of air molecules, meaning there are fewer air molecules in a given volume compared to an atmosphere with higher pressure.

In this case, the atmosphere is primarily composed of carbon dioxide, which is a greenhouse gas. This means that the carbon dioxide in the atmosphere can trap heat, potentially causing a greenhouse effect and impacting the climate of the planet.

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Density is the ratio of mass to volume of an object. To calculate the density of the moon, we will use the formula:ρ = m/V where ρ is the density, m is the mass, and V is the volume.

The volume of a sphere is given as:V = (4/3)πr³where r is the radius of the sphere. The diameter of the moon is given as 3475 km,  its radius is:r = (3475/2) km = 1737.5 km = 1.7375 x 10⁶ m Substituting the values of m and V in the formula for density,

we have:ρ = m/V= (7.35 x 10²² kg)/[(4/3)π(1.7375 x 10⁶ m)³]= 3.35 g/cm³ , the density of the moon is approximately 3.35 g/cm³.b) .

We can calculate the final velocity of the car by using the formula:v² = u² + 2 as where v is the final velocity, u is the initial velocity, a is the acceleration, and s is the distance traveled.

Substituting the values given, we have:v² = (0 m/s)² + 2(4.5 m/s²)(110 m)= 990 m²/s² Taking the square root of both sides, we get:v = √(990 m²/s²)≈ 31.4 m/s  , the final velocity of the car is approximately 31.4 m/s.

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Answer:

Metal, middle of the periodic table, solid.

Explanation:

Because they have an extended structure, elements that are metal tend to be in the middle of the periodic table state at room temperature as solid.

Explanation:

1. Average Speed formula is

\(s = \frac{d}{t} \)

As the distance increases, and the time remains constant, thr speed increases as well

2. Forces cause object to speed up or slow down by extering a greater force on a object than its force that opposes it. For example, if a person is running. The pushing force ( the person using their legs to run) is greater than the friction force. which is from the ground.

Answer:

Point 2.

Explanation:

Potential energy is simply defined as the energy stored in an object due to its position. It is can be represented mathematically by:

P.E = mgh

Where:

P.E is the potential energy.

m is the mass of the object.

g is acceleration due to gravity.

h is the height to which the object is located.

From the above equation, we can thus say that potential energy depends on the height of the object since the mass of the object is always constant i.e as the height of the object increase, the potential energy also increases and as the height of the object decrease, the potential energy also decreases.

Now, considering the diagram in the question given, we can see that point 2 is the lowest height to which the rider is located. At this point i.e point 2, the rider will have the least potential energy.

Answer: Point 2

Explanation:

1. Five major external forces that affect organizations are economic, social, cultural, demographic, and technological. Economic factors such as inflation and interest rates can impact a company's profitability and purchasing power. Social factors like changing consumer preferences and lifestyles can influence demand for products and services.

Cultural factors like values and beliefs can shape consumer behavior and market trends. Demographic factors such as population size and age distribution can affect target markets.

Technological factors like advancements in automation or digitalization can disrupt industries and create new opportunities. These external forces shape the business environment and organizations must monitor and adapt to them to stay competitive.

2. Gathering competitive intelligence is crucial for businesses because it provides valuable insights about their competitors' strategies, strengths, weaknesses, and market position.

By understanding the competitive landscape, businesses can identify opportunities and threats, make informed decisions, and develop effective strategies.

Competitive intelligence helps businesses stay ahead of their competitors, anticipate market trends, identify emerging technologies, and improve their own products or services. It allows businesses to benchmark their performance, evaluate their competitive advantage, and identify areas for improvement.

Ultimately, gathering competitive intelligence empowers businesses to make proactive and strategic decisions that can lead to sustainable growth and competitive advantage.

3. In business, various economic variables need to be monitored as they have significant impacts on strategy applications. Some important economic variables include GDP (Gross Domestic Product), inflation rate, exchange rates, interest rates, consumer spending, unemployment rate, and industry-specific factors like raw material prices or energy costs.

Monitoring these variables helps businesses understand the overall economic conditions, identify market opportunities, and assess potential risks. For example, a high inflation rate may impact pricing strategies, while a favorable exchange rate can benefit export-oriented businesses.

By monitoring economic variables, businesses can adapt their strategies accordingly and make informed decisions to navigate the dynamic business environment.

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Answer: Acceleration = Force/Mass

Explanation:

F = ma

a = F/m

Acceleration = Force/Mass

Answer:

current must flow and chemical energy must take place

Answer:

Well there is gravitational force acting on the bucket ,gravitational force is a downward force so it will be acting on the bucket making it harder to lift it

Answer:

The reason why times, 0.23 s, and 1.80 s makes sense is that a projectile passes through a given height level, which is lesser than the maximum height reached by the projectile, twice in its trajectory

Explanation:

The formula for the time of motion of a projectile is given as follows;

\(t = \dfrac{-V_{oy} \pm \sqrt{V_{oy} ^2 - 2 \cdot g \cdot \Delta y} }{-g}\)

Therefore, when \(V_{oy} ^2 = 2 \cdot g \cdot \Delta y}\), we have only one time value

When \(V_{oy} ^2 > 2 \cdot g \cdot \Delta y}\), two time values can be obtained and both will be positive when we have;

\(V_{oy} > \sqrt{V_{oy} ^2 - 2 \cdot g \cdot \Delta y} }\)

When \(V_{oy} < \sqrt{V_{oy} ^2 - 2 \cdot g \cdot \Delta y} }\), one of the time values will be negative and can be rejected

Therefore, given that the times obtained above are 1.80 s, and 0.23 s, and both make sense due to the following reason;

In the path of the projectile motion of the basketball, there are two points in time at which the height of the basketball above the starting point is exactly 2 meters, given that the maximum height reached is more than 2 meters

The first time the basketball is 2 meters above the point it is shot is lesser of the two calculated time values, which is during the upward motion of the basketball before it reaches the maximum height, while the second time is, which is the larger calculated time, is the time that the basketball reaches the hoop, after flying past the highest point

The other force that must be acting on the duck is upthrust of 10 N.

The given parameters;

When the weight of the object is equal to the upthrust, the apparent weight will be zero and the object will float in the liquid. This is known as principle of floatation.

Since the given weight of the rubber duck is 10 N, then the upthrust on the duck will be 10 N to enable the duck float on the water.

Thus, the other force acting on the duck is upthrust of 10 N.

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Answer:

f=1.5MHz or f=1500Hz

Explanation:

f=v/λ

3×10⁸/2×10-⁵

f=1500Hz

f=1.5MHz

Overhead is applied to work in process based on the predetermined rate times standard activity allowed in a standard costing system.

A standard cost is a fixed price per unit of direct materials, fixed price per direct labour hour, and fixed price per hour of overhead that is based on predicted quantities of direct materials and projected direct labour time.

Top management may find a standard cost system useful for planning and decision-making. easier and more reasonable inventory measurements. Compared to an actual cost system, a standard cost system makes inventory valuation simpler. Unit costs for batches of identical products may differ significantly under an actual cost system.

Therefore,Overhead is applied to work in process based on the predetermined rate times standard activity allowed in a standard costing system.

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Answer:

2) Milligrams

Explanation:

Answer:

2.3*10^6 cubic km's is the volume of the Europa's ocean.

The largest number is 1111. Option A.

The initial state in a state or activity diagram. Represents the state of an object before the events contained in the diagram act on it. Transitions from initial states are usually unlabeled and represent transitions to enclosing states. A final state marks the end of the execution flow of a state machine or region.

Can have multiple incoming transitions but no outgoing transitions. Each region can have at most one final state. For orthogonal regions, execution flow stops when all region end conditions are reached. In quantum state terms, colliding particles form an initial state. In a collision, particles can be annihilated and/or exchanged resulting in a different set of particles in the final state.

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Answer:

yes it is a reactant

Answer:

The upper fixed point, or steam point, is the temperature of pure boiling water at normal atmospheric pressure. Note that the fixed points are defined using common physical phenomena so that they can be easily reproduced.

Answer:

Steam point

Explanation:

The upper fixed point, or steam point, is the temperature of pure boiling water at normal atmospheric pressure.

Answer:

12000 N = 1223.66 kg

Explanation:

Because 1 newton is equal to 0.101971621 kilogram.

When a proton is removed from point A and an electron is placed at point B, the direction of the electric force will be from point B towards point A. The angle of this force relative to the x-axis would be 180 degrees, with counterclockwise as positive.

As the electron and proton have equal and opposite charges, the magnitude of the force between them will be the same as the magnitude of the force between the proton and the electron.

The magnitude of the force between the proton and electron can be determined by Coulomb's law, which states that the force is proportional to the product of the charges and inversely proportional to the square of the distance between them.

In other words, the magnitude of the two forces is equal, but the direction of the two forces is opposite.

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Answer:

\(a=-3\ m/s^2\)

Explanation:

Given that,

Initial speed of a train, u = 12 m/s

Final speed of a train, v = 9.6 m/s

Time taken, t = 0.8 s

We need to find the average acceleration of the train. We know that the rate of change of velocity is equal to acceleration. So,

\(a=\dfrac{v-u}{t}\\\\a=\dfrac{9.6-12}{0.8}\\\\a=-3\ m/s^2\)

So, the average acceleration of the train is equal to \(-3\ m/s^2\).

The time period is 0.3 s and frequency is 3 Hz

Step 1 :

Given:

No. of cycles N = 24

Total time take t = 8 s

Step 1 : Calculating the frequency:

The frequency of a wave or oscillation is defined as the number of cycles or completed alternations per unit time.

f = N/t

f = 24/8

f = 3 Hz

Step 2: Calculating the time period:

Frequency and time period are inversely proportional.

The amount of time it takes for something to complete one oscillation is called its time period.

Time period = 1/Frequency

Time period = 1/3 = 0.3 s

So, the time period is 0.3 s and frequency is 3 Hz.

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