Which term best describes the phrase "something that happens"?
A. Experiment
B. Observation
C. Hypothesis
D. Phenomenon

Answer:

Work, in physics, measure of energy transfer that occurs when an object is moved over a distance by an external force at least part of which is applied in the direction of the displacement

Explanation:

When,a man stands still on a moving walkway that is going at a speed of 0.2 m/s to the west,then the velocity of the man according to a stationary observer would be 0.2 m/s west,Therefore, the correct answer would be option B.

The total displacement covered by any object per unit of time is known as velocity. The velocity of an object is depend on the magnitude as well as the direction of the object.

the mathematical expression for velocity is given by

velocity = total displacement /time

The speed and velocity of the object are very different from each other because speed does not depend upon the direction of the moving  object but velocity depends on the magnitude of speed as well as the direction of the moving object.

As per given in the problem a man stands still on a moving walkway that is going at a speed of 0.2 m/s to the west therefore from the perspective  of a stationary observer the velocity of man would be 0.2 m/s towards West.

Hence the correct options for the problem would be option B.

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The tension in the lower (slack) segment of the belt is approximately 95.82 N.

Mass of the flywheel (m) = 66.5 kg

Radius of the flywheel (R) = 0.625 m

Radius of the pulley (r_f) = 0.230 m

Tension in the upper segment of the belt (Tu) = 171 N

Clockwise angular acceleration of the flywheel (α) = 1.67 rad/s²

Moment of inertia of the flywheel (I):

I = (1/2) * m * R²

I = (1/2) * 66.5 kg * (0.625 m)²

I = 13.164 kg·m²

Torque on the flywheel (τ):

τ = I * α

τ = 13.164 kg·m² * 1.67 rad/s²

τ = 21.9398 N·m

Torque on the motor pulley (τ):

τ = Tu * r_f

Solving for Tl (tension in the lower segment of the belt):

Tu * r_f = Tl * r_f

Tl = (τ) / r_f

Tl = 21.9398 N·m / 0.230 m

Tl ≈ 95.82 N

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the complete question is:

An electric motor turns a flywheel through a drive belt that joins a pulley on the motor and a pulley that is rigidly attached to a flywheel. The flywheel is a solid disk with a mass of 66.5 kg and a radius R = 0.625 m. It turns on a frictionless axle. Its pulley has much smaller mass and a radius of 0.230 m. The tension Tu in the upper (taut) segment of the belt is 171 N, and the flywheel has a clockwise angular acceleration of 1.67 rad/s2. Find the tension in the lower (slack) segment of the belt.

Answer:

3

ExplSpanisshh

Answer:

to find the amount of work done, you need to calculate the force applied to the box times the distance over which it is applied. In this case, the force applied to the box is 15N and the distance over which it is applied is 3 meters, so the amount of work done is 15N * 3m = 45N*m.

Explanation:

It's important to note that work is a scalar quantity, not a vector quantity. This means that it has only magnitude and no direction. The direction of the force applied to the box and the direction of the displacement of the box are not relevant in calculating the amount of work done.

Important Formulas:
\(w=Fd\)

work(measured in joules) = force(measured in newtons) * distance(measured in meters)

__________________________________________________________

Given:

\(F=15N\)

\(d=3m\)

\(w=?\)

__________________________________________________________

Finding work:

\(w=Fd\)

\(w=15\times3\)

__________________________________________________________

\(\fbox{w = 45J}\)

Answer:

b. Oceans moderate temperatures and climate.

Explanation:

i had this on my quiz and it was right =]

If F = 37 N, the static frictional force between the block and the table and the minimum force required to move it must be equal.

It is the force that regulates itself. The value of static friction varies from zero to the smallest force required to initiate motion. The formula for determining static friction is as follows: Normal Force divided by the static friction coefficient is static friction.

Although the maximum static friction will rise, the frictional force will always be the same as the weight in mg because friction cannot accelerate an object. Because FrN can take any value less than N to balance the weight, this is the case.

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When a parallel beam of light from a He-Ne laser with a wavelength of 633 nm falls on two very narrow slits that are 0.070 mm apart, an interference pattern is observed. This pattern is a result of the phenomenon known as double-slit interference.

In double-slit interference, light waves passing through the two slits interfere with each other, creating alternating regions of constructive and destructive interference. The interference pattern consists of bright fringes (where constructive interference occurs) and dark fringes (where destructive interference occurs).

To determine the position of the bright fringes, we can use the formula for the position of the bright fringe (m) on a screen placed at a distance (D) from the slits:

y = (mλD) / d

Where:
- y is the distance from the central maximum to the mth bright fringe
- λ is the wavelength of the light (633 nm in this case)
- D is the distance from the slits to the screen
- d is the distance between the two slits (0.070 mm in this case)

The interference pattern will have bright fringes spaced at regular intervals on the screen. By calculating the position of these fringes using the formula, you can determine the distance between them.

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If you keep them exactly the same distance apart, then wrapping the soccer ball in layers of duct tap will increase he gravitational force between them, because the mass of the soccer ball will increase slightly.

The gravitational force between the baseball and a soccer ball will increase by wrapping the soccer ball in layers of duct tap.

The given problem is based on the concept and fundamentals of gravitational force. The force come into play between the objects on Earth and Earth itself on account of gravity, is known as the gravitational force.

Now considering the given problem, the mathematical expression for the gravitational force is,

\(F = \dfrac{G \times m \times M}{r^{2}}\)

Here,

G is the universal gravitational constant.

m is the mass of baseball.

M is the mass of Soccer ball.

r is the distance between the baseball and Soccer ball.

Clearly, the gravitational force is directly proportional to the masses of Baseball and soccer ball and inversely proportional to the square of distance between them.

So, in order to increase the gravitational force, we need to bring both the balls closer because the masses of each balls remains constant. And this is achieved by wrapping the soccer ball in layers of duct tap.

Thus, we can conclude that the gravitational force between the baseball and a soccer ball will increase by wrapping the soccer ball in layers of duct tap.

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The automobile would have traveled a distance of 120 kilometers.

When an automobile is driven on a straight road, the distance traveled by the automobile after time t can be calculated using the equation:

distance = speed × time

In this equation, speed refers to the rate at which the automobile is traveling and time represents the duration for which the automobile has been driven.

For example, let's say the speed of the automobile is 60 kilometers per hour and the time it has been driven is 2 hours. To find the distance traveled, we would multiply the speed (60 km/h) by the time (2 hours) as follows:

distance = 60 km/h × 2 hours
distance = 120 kilometers

So, in this case, the automobile would have traveled a distance of 120 kilometers.

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Answer:

A constant velocity of an object ensures that the rate of change of velocity with time is null, and hence, the acceleration of the object is zero. A constant acceleration of an object ensures that the velocity of the object is changing continuously with time, and the velocity will not be constant.

Explanation:

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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:

pls mark as brainliest

Explanation:

Velocity and speed is constant

(a) The Jeans mass (M_J) is a critical mass above which a cloud in the interstellar medium becomes gravitationally unstable and begins to collapse. It can be calculated using the formula: M_J = (5 * k * T * (3/2) / (G * μ * m_H))^(3/2) * (1/n)^(1/2)

where k is the Boltzmann constant (1.38 x 10^(-23) J/K), T is the temperature, G is the gravitational constant (6.67 x 10^(-11) N m²/kg²), μ is the mean molecular weight, m_H is the mass of a hydrogen atom (1.67 x 10^(-27) kg), and n is the number density.
For the molecular (H2) cloud: T = 10 K, n = 10^12 m^(-3), and μ = 2 (since H2 has two hydrogen atoms).
M_J(H2) ≈ 1.26 x 10^(-17) kg
For the atomic (H) cloud: T = 120 K, n = 10^7 m^(-3), and μ = 1 (since H has one hydrogen atom).
M_J(H) ≈ 3.36 x 10^22 kg
(b) The minimum radius (R_J) for each cloud to collapse can be found using the formula:
R_J = (3 * M_J / (4 * π * ρ))^(1/3)
where ρ = n * μ * m_H is the mass density of the cloud.
R_J(H2) ≈ 1.73 x 10^6 m
R_J(H) ≈ 2.31 x 10^(-2) m
(c) The timescale (t_collapse) for the gravitational collapse of each cloud can be estimated using the formula:
t_collapse ≈ (3 * π / (32 * G * ρ))^(1/2)
t_collapse(H2) ≈ 4.54 x 10^11 s ≈ 14,400 years
t_collapse(H) ≈ 1.02 x 10^16 s ≈ 3.23 x 10^8 years

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Answer:

all the body parts work together to make your body function properly, so therefore, a lot of other body parts will break down

The law of conservation of energy

Energy cannot be created or destroyed, but it can be changed from one form to another.

KE + PE = constant

Answer:

the second and the third

Explanation:

the maximum daylight hours is the second, and the warmest temperatures for the northem hemisphere.

Answer:

C. Heat flows from lemonade to the ice

Explanation:

Transfer of heat from the drink to the ice is what melts the ice and cools the drink.

Answer:

Workdone = 1.96 Nm

Explanation:

Given the following data;

Mass = 100g to kg 100/1000 = 0.1Kg

Distance = 2m

To find the workdone;

First of all, we would determine the force acting on the apple

Force = mass * acceleration due to gravity

But, acceleration due to gravity is equal to 9.8m/s²

Force = 0.1 * 9.8

Force = 0.98N

Now, we can find the workdone using the formula;

Workdone = force* distance

Substituting into the equation, we have

Workdone = 0.98 * 2

Workdone = 1.96 Nm

Answer:

C. The acceleration of an object is inversely proportional to the mass of the object.

Explanation:

According to Newton's second law of motion;

Force is given by the multiplication of mass and acceleration.

Mathematically, Force is;

\( F = ma\)

Where;

F represents force.

m represents the mass of an object.

a represents acceleration.

Making acceleration (a) the subject of formula, we have;

\(Acceleration (a) = \frac{F}{m}\)

Therefore, the acceleration of an object is inversely proportional to the mass of the object and directly proportional to the magnitude of the force acting on an object or a body.

The speed of the elevator after it has moved downward is 4.43 m/s.

The speed of the elevator after the impact can be determined by applying the principle of conservation of mechanical energy as shown below;

K.E = P.E

¹/₂mv² = mgh

¹/₂v² = gh

v² = 2gh

v = √2gh

v = √(2 x 9.8 x 1)

v = 4.43 m/s

Thus, the speed of the elevator after it has moved downward is 4.43 m/s.

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Answer:

-12.38 N

Explanation:

This question requires you to first find the acceleration then apply Newton's 2nd law of motion to find the force.

To find deceleration use the formula;

v²= u²+2ad ---where

v= final speed = 0 m/s

u= initial speed = 3.0 m/s

a= acceleration { in this case , deceleration} = ?

d= distance from the point where its passenger rolled off= 4.0 m

therefore ;

\(a=\frac{v^2-u^2}{2d}\)

\(a=\frac{0^2-3^2}{2*4} =\frac{-9}{8} m/s^2\)

Mass of the sled is calculated from its weight force.

Weight force = mg

mass of sled = weight force / g  where g= 10 m/s²

mass of sled = 110/10 = 11kg

The magnitude of horizontal net force will be : F= ma  where ;

m= mass of sled = 11 kg

a= deceleration = -9/8 m/s²

F = 11 * -9/8 = -12.38 N

Force is acting on the opposite direction of the initial motion of the sled.

The magnitude of the horizontal net force acting on the sled is 12.375 N.

Given data:

The initial speed of sled is, u = 3.0 m/s.

The final speed of sled is, v = 0 m/s.

The distance covered before stopping is, s = 4.0 m.

The weight of sled is, W = 110 N.

Using the Newton's second law, the net horizontal force acting on the sled is given as,

F = ma

here,

m is the mass of sled.

a is the acceleration of sled.

Mass is calculated from the weight as,

W = mg

110 = m (10)

m = 11 kg.

Now, using the second kinematic equation of motion to obtain the acceleration of sled as,

\(v^{2}=u^{2}+2(-a)s\\\\0^{2}=3^{2}+2(-a)4\\\\8a=9\\\\a=1.125 \;\rm m/s^{2}\)

Then the magnitude of net horizontal force is,

\(F = ma\\\\F = 11 \times 1.125\\\\F = 12.375\;\rm N\)

Thus, we can conclude that the magnitude of the horizontal net force is 12.375 N.

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Answer:

Some object have less gravitational pull than other objects.

Explanation:

A 0.12-meter-long electromagnetic (radar) wave is emitted by a weather station and reflected from a nearby thunderstorm. The frequency of the radar wave is 2.5 GHz.

To determine the frequency of the radar wave, we can use the wave equation:

v = λf

Where:

v is the speed of light in a vacuum (approximately 3.00 x 10⁸ meters per second)

λ is the wavelength of the radar wave

f is the frequency of the radar wave

Given:

Wavelength (λ) = 0.12 meters

f = v / λ

Substituting the given values:

f = (3.00 x 10⁸ meters per second) / (0.12 meters)

f ≈ 2.5 x 10⁹ Hz

Therefore, the frequency of the radar wave is approximately 2.5 x 10⁹ Hz (or 2.5 GHz).

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In recent years, there has been growing concern about the declining quality of queen bees. This can be attributed to a number of factors, including the use of pesticides and other chemicals, disease and parasitic infestations, and poor breeding practices.

Queen bees are crucial to the survival and health of a bee colony. They are responsible for laying the eggs that will eventually become the worker bees, drones, and future queens.

Pesticides and chemicals used in agriculture can have a devastating impact on bees. They can weaken the immune system of the queen, making her more susceptible to diseases and infections. Additionally, these chemicals can accumulate in the queen's body over time, leading to long-term health problems.

Diseases and parasitic infestations can also take a toll on queen bees. Varroa mites, for example, can weaken and deform developing queens, leading to a shorter lifespan and reduced fertility. Similarly, the spread of diseases such as American foulbrood and chalkbrood can also reduce the overall quality of the queen bee population.

Finally, poor breeding practices can also contribute to the declining quality of queen bees. Some breeders focus solely on maximizing honey production and neglect the genetic health and diversity of the colony. This can lead to a weaker, less resilient bee population over time.

In conclusion, the quality of queen bees has been declining in recent years due to a variety of factors. It is crucial that beekeepers and breeders take steps to address these issues in order to ensure the continued health and survival of bee colonies around the world.

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Answer:

Below

Explanation:

To find the final velocity Vf of an object you can use this formula :

     Vf = √Vi^2 + 2ad

          = √0m/s^2 + 2(7.5m/s^2)(87m)

          = 36.1247.... m/s

The final velocity of this object is 36 m/s

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Answer:

O.8A

Explanation: