If there is no change in the velocity of the object then it is known to be in ______

a) constant speed
b) uniform acceleration
c) uniform motion
d) non-uniform motion

Answer:

C

Explanation:

Answer:

C) an investigation of conduction through collisions between particles in space

Answer:

transmission: the passing of a wave through an object

Explanation:

In the experiment, the researcher investigates the relationship between effort distance and the applied effort on lifting a load, with effort distance as the independent variable, the applied effort as the dependent variable, and load weight and surface angle as controlled variables.

i. The variables involved in this experiment are:

Effort distance (E.d.): The distance over which the effort force is applied.

Load distance (L.d.): The distance over which the load is lifted.

Effort applied: The force exerted by the researcher to lift the load.

ii. The variables that need to be controlled in this experiment are:

Load weight: The weight of the load should be kept constant to ensure that only the effort distance is being tested.

Surface angle: The slanted surface angle should be consistent for each trial to isolate the effect of effort distance.

iii. The independent, dependent, and controlled variables can be identified as follows:

Independent variable: Effort distance (E.d.) is the independent variable as it is intentionally varied by the researcher to observe its effect on the effort applied.

Dependent variable: The dependent variable is the effort applied. It is measured or observed and expected to change based on the different effort distances.

Controlled variables: The load weight and surface angle are controlled variables. They are kept constant throughout the experiment to eliminate their influence on the results and isolate the effect of effort distance.

Therefore, Using effort distance as the independent variable, applied effort as the dependent variable, load weight and surface angle as the controlled variables, the researcher conducts an experiment to examine the link between these two factors when lifting a load.

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The time required by the train to be 360m ahead of the car on the road is found to be 9 seconds.

The train track runs parallel to a road, a high speed train is travelling on the track with a speed of 60m/s and a car passes by with a speed of 20m/s.

Now, the time required by the train to be 360m ahead of the car is given by the relation,

Relative Speed = Distance/time

Relative speed = speed of train - speed of car

Relative speed = 60m/s - 20m/s

Relative speed = 40m/s.

Distance = 360m.

Now, putting all the values,

Time = Distance/relative speed

Time = 360/40

Time = 9 seconds,

So, the time required by the train to go ahead is 9seconds.

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Answer:

yes that is correct

Explanation:

Yes, very young star clusters have main-sequence turnoffs. A main-sequence turnoff is a point on the Hertzsprung-Russell (H-R) diagram where stars begin to leave the main sequence and evolve into different stages of their lives.

What is the main sequence turnoff?

The main sequence turnoff refers to the stage in the evolution of a star cluster when the stars with the greatest mass have completed hydrogen fusion in their cores and are about to evolve off the main sequence. A young star cluster's main-sequence turnoff provides information about the cluster's age.

Use of main-sequence turnoff:

Because the most massive stars have the shortest main sequence lifetimes, they quickly die and leave the main sequence behind, accumulating at a place on the Hertzsprung-Russell (HR) diagram known as the main-sequence turnoff (MSTO). This is the position at which the most massive stars have exhausted their nuclear fuel in the cluster. The age of a cluster can be determined by measuring its MSTO position on an HR diagram and comparing it to the predicted position of the MSTO for stars of various ages.

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Answer:

Inertia

Explanation:

The term for the tendency is inertia.

The inertia of a body is the tendency of the body to remain unmoved when at rest and the tendency to keep moving when in motion. In other words, it is the tendency of a body to remain in a state of rest or motion.

A static body will remain in a state of perpetual rest if no force acts on it and a moving body will keep moving in the same direction if no force acts on it. The force that needs to be overcome in order to change the state of the object is otherwise known as inertia force.

Answer:

32.5

Explanation:

Choose the normal force acting between the object and the ground. Let's assume a normal force of 250 N .

Determine the friction coefficient. ...

Multiply these values by each other: (250 N) * 0.13 = 32.5 N .

You just found the force of friction!

The resultant of the forces is 29 N. Option D

The resultant force is the force that acts in a given direction. Now we have two forces as enumerated in the question.

Thus;

Resultant = √(10)^2 + (20)^2 - [2 * 10 * 20 * cos (60 - 30))

Resultant = 29 N

Thus, the resultant of the forces is 29 N.

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Missing parts;

Two forces of magnitude 10N and 20N act on a body in directions making angles 30° and 60° respectively with x-axis what is the resultant force

A.17N

B. 19N

C. 23N

D. 29N

E. 37N​

Initial velocity is when the motion starts.

Explanation:

Initial velocity is is the velocity at time interval t = 0 is represented by u.

Well, you didn't tell us what the unit of the 53.14 is.  But whatever it is, the force of friction is the same 53.14 of them.

The only way the box can move with constant velocity is if the forces acting on it all add up to zero. So the force of friction to the left, holding it back, must be exactly equal to the force pushng it forward to the right.

Notice that none of this depends on the mass of the box, or WHAT the constant velocity IS.  None of that information matters, or makes any difference. It's only included in the question to confuse and distract us.  

The radius of the output cylinder is 0.11 m.

Radius of the input cylinder, r₁ = 0.01 m

Input force applied, F₁ = 200 N

Mass of the output cylinder, m₂ = 2500 kg

Since more collisions with the piston occur when the area is increased but the number of molecules per cubic centimetre remains constant, the force is proportional to the area.

Force applied on the output cylinder = Weight of the output cylinder

F₂ = m₂g

F₂ = 2500 x 9.8

F₂ = 245 x 10²N

We know that the force applied on an object is directly proportional to the area of the object.

F ∝ A

So, F₁/F₂ = A₁/A₂

F₁/F₂ = (r₁/r₂)²

200/24500 = (r₁/r₂)²

Therefore, the radius of the output cylinder is,

r₂ = r₁√(24500/200)

r₂ = 0.01 x√122.5

r₂ = 0.01 x 11.06

r₂ = 0.11 m

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Answer:

this is the answer the required questions

hope you like this

The accelerating potential difference needed for a proton to have a wavelength of 100 pm is 2 volts.

To calculate the accelerating potential difference needed for a proton to have a wavelength of 100 pm, we can use the de Broglie equation:
wavelength = h / mv
Where h is Planck's constant, m is the mass of the proton, and v is its velocity.
Rearranging this equation, we can solve for v:
v = h / (m * wavelength)
Plugging in the values, we get:
v = (6.626 x 10^-34 J s) / [(1.673 x 10^-27 kg) * (100 x 10^-12 m)]
v = 3.961 x 10^7 m/s
Now, we can use the kinetic energy equation to find the potential difference needed to accelerate the proton to this velocity:
K.E. = qV = (1/2)mv^2
Solving for V, we get:
V = (2K.E.) / q
Where q is the charge of the proton.
Plugging in the values, we get:
V = (2 * 1.602 x 10^-19 J) / (1.602 x 10^-19 C)
V = 2 V

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The evolution of energy matrices, the social and environmental consequences of energy sources, and the relationship between energy development and industrial development are critical aspects of understanding the interplay between energy and the modern world. Balancing the need for energy with sustainability and minimizing environmental impacts is a key challenge for societies today.

a) The evolution of the main energy matrices after the industrial revolution:

The industrial revolution marked a significant shift in the sources of energy used to power the growing industries and societies. Prior to the industrial revolution, human and animal labor, along with limited use of water and wind power, were the primary sources of energy. However, with the advent of steam engines and mechanization, there was a need for more abundant and efficient sources of energy.

Coal: Coal became the dominant energy source during the early stages of the industrial revolution. It provided the necessary fuel for steam engines and played a crucial role in powering factories, railways, and steamships.

Oil: The discovery and commercialization of oil in the late 19th century revolutionized the energy landscape. Oil became a major source of energy for transportation, as it fueled the internal combustion engines of automobiles, trucks, and airplanes.

Natural Gas: With the expansion of oil drilling, natural gas also emerged as an important energy source. It is used for heating, electricity generation, and as a feedstock for various industrial processes.

Nuclear Energy: The development of nuclear power in the mid-20th century introduced a new source of energy. Nuclear reactors harness the energy released from nuclear fission reactions to generate electricity.

Renewable Energy: In recent decades, there has been a growing emphasis on renewable energy sources such as solar, wind, hydroelectric, and geothermal power. These sources offer sustainable alternatives to fossil fuels, with lower environmental impact and the potential for long-term energy security.

b) The social and environmental consequences of these energy sources:

Each energy source has its own social and environmental consequences:

Fossil Fuels: The burning of fossil fuels, such as coal, oil, and natural gas, releases greenhouse gases and contributes to climate change. Extraction of fossil fuels can lead to habitat destruction, water pollution, and health hazards for workers and nearby communities.

Nuclear Energy: While nuclear energy does not produce greenhouse gas emissions during operation, it presents risks associated with accidents, radioactive waste disposal, and potential weaponization of nuclear materials. Public safety concerns and environmental risks have led to debates over the use of nuclear power.

Renewable Energy: Renewable energy sources offer benefits in terms of reduced greenhouse gas emissions and environmental sustainability. However, their deployment may require land use changes, and some technologies (e.g., large-scale hydroelectric dams) can cause ecological disruptions and displacement of communities.

c) The relationship between energy development and degree of industrial development:

Energy development and industrial development are closely intertwined. The availability of affordable and reliable energy sources is crucial for driving industrialization and economic growth. Access to abundant energy resources enables countries to power their industries, expand transportation networks, and improve living standards.

Countries that have invested in the development and exploitation of energy sources have typically experienced accelerated industrialization and technological advancement. The ability to secure and utilize energy resources efficiently has been a determining factor in a country's competitiveness and economic prosperity.

Conversely, countries that lack access to energy sources or fail to invest in their energy sectors may face challenges in industrial development. Limited energy availability can constrain production capacities, limit access to modern technologies, and hinder economic progress.

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Given that both the chair and the person are affected by Earth's movement, we can deduct that both have inertia due to Earth's speed.

Answer:

a: a screwdriver

Explanation:

The best way for a tennis enthusiast to estimate the mean length of tennis matches is to conduct a statistical study by collecting data on the lengths of matches. Two matches should be in a sample to estimate the mean length.

The enthusiast can gather data from various sources such as tournament websites, sports magazines, and databases. Estimating the mean length of tennis matches requires collecting data and conducting a statistical study.

To get a reliable estimate of the mean length of tennis matches, a tennis enthusiast can collect data on the lengths of matches played in various tournaments. They can collect data from tournament websites, sports magazines, and databases such as the International Tennis Federation.

Once the data is collected, the enthusiast can use statistical tools such as mean, median, and mode to estimate the average length of tennis matches. Another way to get a more accurate estimate is to calculate the standard deviation of the data.

By doing this, the enthusiast can get an idea of the spread of the data, which can help to identify outliers or unusual matches that may affect the mean. In conclusion, conducting a statistical study by collecting data is the best way to estimate the mean length of tennis matches.

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Momentum can be calculated by multiplying the mass of an object by the velocity of an object. Thus, the correct option is C.

The momentum is a quantity which can be defined as the product of the mass and velocity of an object. It is an example of standard mechanical quantity. Momentum is a vector quantity, this means it possess both a magnitude and a direction. If "m" is an object's mass and "v" is its velocity, then the object's momentum p is:

p = m × v

The examples of momentum is whenever we toss a ball at someone as well as it smacks them square in the face. It indicates how difficult it would have been to stop the ball.

Therefore, the correct option is C.

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Answer:

Explanation:

The distance covered by an object given it's velocity and time taken can be found by using the formula

We have

distance = 5 × 3

We have the final answer as

Hope this helps you

Answer:

a. Patterns of motion among large bodies- Sun, planets, large moons rotate in an organized way (co-planar)—nearly circular orbits in the same direction (coplanar and prograde)

b. Two major types of planets- terrestrial vs. jovian planets

c. Asteroids and comets- locations, orbits, and compositions follow distinct patterns—Asteroids are b/t Mars and Jupiter in the asteroid belt. Also located in the Kuiper belt and Oort Cloud

d. Exceptions to the rules- Earth is inner planet with large moon, Uranus is only side tilted axis, etc.

Hope this helps

The angular momentum of a system is constant if the total linear momentum of the system is zero.

The main answer is that if the total linear momentum of a system of particles is zero, the angular momentum of the system remains constant regardless of the choice of origin. Angular momentum is a measure of rotational motion and depends on the distribution of mass and velocity within the system

When the total linear momentum is zero, it implies that the system's center of mass is stationary or moving at a constant velocity. In such cases, the system's angular momentum is independent of the origin chosen for calculations.

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Answer:Anything that makes matter move or change change. Any object in motion

Explanation:

Answer:

A. Generator

Explanation:

Hope this will help

Answer:

A. Generator

Explanation:

That is the correct answer

The charge on the red sphere, q_red, can be calculated in terms of q, d1, d2, and θ. The formula to determine q_red is q_red = (d2 / d1) * q * tan(θ).

This formula considers the distances d1 and d2 between the yellow and red spheres, respectively, as well as the angle θ between the line connecting the spheres and a reference line. By plugging in the known values and using this formula, we can find the value of q_red.

To determine the charge on the red sphere, q_red, we can use the concept of electric field lines and the geometry of the setup. The formula for calculating q_red in terms of q, d1, d2, and θ is q_red = (d2 / d1) * q * tan(θ).

This formula is derived from the fact that the electric field lines radiate outwards from a charged object and are proportional to the charge. The electric field at a point due to the yellow sphere can be expressed as E_yellow = k * q / d1^2, where k is the electrostatic constant.

The electric field due to the red sphere at the same point can be expressed as E_red = k * q_red / d2^2. Since the electric field lines from both spheres must be perpendicular to each other, the tangent of the angle θ can be defined as tan(θ) = E_red / E_yellow.

Rearranging this equation, we find q_red = (d2 / d1) * q * tan(θ). This equation relates the charge on the red sphere (q_red) to the charge on the yellow sphere (q), the distances between the spheres (d1 and d2), and the angle (θ). By plugging in the known values for q, d1, d2, and θ into this equation, we can calculate the value of q_red.

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2. The angle of refraction of the material is 16.0°.

4. Index of refraction of the prism is n = 1.45.

2. Using Snell's law:

n₁sinθ₁ = n₂sinθ₂

where n₁ = index of refraction of the first material (a), θ₁ = angle of incidence (13°), n₂ = index of refraction of the second material (1.60), and θ₂ = angle of refraction (unknown).

Plugging in the given values:

2.04sin13° = 1.60sinθ₂

θ₂ = sin⁻¹(2.04sin13°/1.60) = 16.0°

Therefore, the angle of refraction is θ = 16.0°.

4. Again, using Snell's law:

n₁sinθ₁ = n₂sinθ₂

where n₁ = index of refraction of water (1.33), θ₁ = angle of incidence (45°), n₂ = index of refraction of the prism (unknown), and θ₂ = angle of refraction (42°).

Plugging in the given values:

1.33sin45° = n₂sin42°

n₂ = sin45°/sin42° × 1.33 ≈ 1.45

Therefore, the index of refraction of the prism is n = 1.45.

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Answer:

1 Atm (atmospheric pressure) is equal to 101325 pascal (Pa). To convert atm to pascal, multiply the atm value by 101325. atm to pascal formula. Pa = atm * 101325.

Explanation: