What are the SI base units for length and mass?
kilometer and gram
meter and gram
meter and kilogram
kilometer and kilogram

The average speed of the ball as it rolls 10 meters is 8.33 meters per second.

The average speed of the ball as it rolls the 10 meters can be found by dividing the total distance traveled by the total time taken. In this case, the ball rolls 6.0 meters while its speed changes from 15 meters per second to 10 meters per second. The time taken to roll this distance can be calculated by using the formula:

Time = Distance / Speed

Substituting the given values:

Time = 6.0 meters / (15 meters per second - 10 meters per second) = 6.0 meters / 5 meters per second = 1.2 seconds

The average speed of the ball is therefore 10 meters / 1.2 seconds = 8.33 meters per second.

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Neptune is eighth the farthest planet from the Sun. It is about 2.8 billion miles (4.5 billion km) away. Neptune appears to look blue because of the gas in its atmosphere. Neptune has at least 14 known moons. Triton is Neptune's largest moon. Triton has volcano-like eruptions that burst from openings in the surface.

Foliated metamorphic rocks exhibit a layered or banded appearance due to the pressure differential during metamorphism, leading to a preferred orientation of minerals. Non-foliated metamorphic rocks, on the other hand, do not demonstrate this feature as they form under conditions where pressure is exerted equally from all sides or from minerals that don't align in planes.

The primary difference between a foliated and a non-foliated metamorphic rock lies in their structure and formation process. Metamorphic rocks undergo a physical and chemical alteration due to high temperature and pressure. This transformation leads to two broad categories: foliated and non-foliated metamorphic rocks.

Foliated metamorphic rocks display a layered or banded appearance that's caused by the pressure differential during the metamorphism process. This causes minerals to be reoriented in the direction of the pressure, producing a foliated structure with parallel alignment of minerals, like in the case of slate and gneiss.

In contrast, non-foliated metamorphic rocks do not have this layered or banded appearance. They are generally formed from minerals that don’t align in planes or have uniform pressure exerted in all directions. Therefore, these rocks such as quartzite and marble, present a massive or granular structure without a preferred orientation of the mineral grains.

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First convert the speed of mosquito to m/s:

So the mosquito is flying at (2,400/3,600) m/s, or ⅔ m/s. 

Since you are moving at 2m/s, so this makes the closing velocity between you and the mosquito to be 2⅔ m/s. 

The purpose of strip cropping is to prevent soil erosion.

Strip cropping involves cultivating a field partitioned into long, narrow strips following the natural contours of the terrain to prevent wind and water erosion of the soil.

Apart from improving fertility of soil, strip cropping reduces soil erosion. Due to the strip of soil in between the crops, erosion of wind and water is prevented as the strip in between serves as a break in the movement of both water and wind.

Soil erosion is a process of movement and transport of the upper layer of soil also called topsoil by different agents particularly water, wind, and mass movement causing its deterioration in the long term.

Soil erosion decreases soil fertility, which can negatively affect crop yields.

The preventive measures should be taken for soil erosion. Some of them are

Thus, Strip cropping method is used when a slope is too steep or too long, or otherwise, when one does not have an alternative method of preventing soil erosion.

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Answer: 117

Explanation:

Answer:Governments can pass laws about scientific research

Explanation:

Final answer:

To hit a target 2.5m away and 20cm above the release point, the dart must be thrown at a speed of approximately 4.95 m/s when launched at a 45° angle. This is derived using projectile motion equations, catering to the horizontal range and maximum height.

Explanation:

To find the initial speed v at which a dart must be thrown at a 45° angle to hit a target 2.5m away, positioned 20cm above the release height, we can use the projectile motion equations. Due to the symmetry of projectile motion at a 45° launch angle, where the horizontal and vertical components of initial velocity are equal, we can solve for v using the formula for the range of a projectile and the formula for the maximum height.

Firstly, assuming no air resistance, the horizontal range R is given by R = v^2 × sin(2°) / g, where g = 9.8 m/s2 is the acceleration due to gravity. At 45°, sin(90°) is 1, thus R = v^2 / g. Setting R = 2.5m gives us the equation to find v.

For the vertical motion, considering the dart must rise 0.20m above the release height, we use the equation y = vy^2 / (2g), where vy is the vertical component of v. Since vy = v × sin(45°), and sin(45°) = sqrt(2)/2, this simplifies the calculation. However, due to the symmetry of the problem, both components contribute equally to achieving the required range and height. Thus, solving the range equation gives us the necessary initial speed directly.

Plugging 2.5m into the range equation R = v^2 / g and solving for v, we find that v = sqrt(R × g). Hence, v = sqrt(2.5 × 9.8), which calculates to approximately 4.95 m/s. Therefore, the dart must be thrown at a speed of roughly 4.95 m/s to hit the bull's eye.

An inkjet printer's speed is measured in pages per minute (ppm), which reflects the number of pages the printer can print in one minute.

The speed of an inkjet printer is typically measured in pages per minute (ppm). This refers to the number of pages the printer is capable of printing in a single minute. It's important to note that this is an average speed and the actual speed may vary depending on the complexity of the document being printed, the quality settings used, and other factors.

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The speed of an inkjet printer is measured in pages per minute (ppm), not characters per second (cps) or dots per inch (dpi). Thus, the right answer is c. ppm.

In the realm of printing technology, the rate at which an inkjet printer can produce output is often denoted by the acronym 'ppm,' which stands for pages per minute. This metric provides a clear indication of the printer's efficiency in generating pages within a specified time frame, making it a widely recognized and practical measure for assessing printer speed.

On the other hand, 'cps,' or characters per second, is a less common unit of measurement and is not typically used to quantify printer speed but rather character-based data transmission or input/output rate in some specific contexts.

Additionally, 'dpi,' which stands for dots per inch, is a distinct and critical measurement parameter related to print resolution rather than speed. It specifies the level of detail and clarity in printed images by quantifying the number of ink or toner dots that can be placed in a linear inch, which is crucial for determining the print quality.

To sum up, when evaluating the swiftness of an inkjet printer's performance, 'ppm' remains the most relevant and widely accepted unit of measurement, while 'cps' and 'dpi' are utilized for different aspects of printer functionality, emphasizing the importance of choosing the appropriate metric for the specific evaluation of printer features.

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The correct choice is (C) later middle years

Later middle years is almost 30 to 40 years of a person's life. It is the most critical period of life because every person wants to get a successful life i this stage. We marry in this age and due to certain failures people get divorced too. Some people lose their jobs due to various reasons and many people also suffer from high debts because they want to stabilize themselves by starting a business if they don't get a suitable job.

The correct answer is (C) the type of groups we associate with when we become adults

It is better said that a man is known by the company he keeps. So therefore it is a proven fact that all people are mostly influenced by their friends and social circle where they spend most of their time. The life style that we get and the behavior that we show is dependent upon the social circle and family members where we live. Therefore as we move in our lives the events we experience are largely influenced by the type of groups we associate with when we become adults

Impulse is the variance of the momentum of a thing when the thing is operated upon by a force for an interval of time. Following are the possible formulas for impulse as;

Momentum is product of mass and velocity. According to newton’s second law, F =ma is by putting values of acceleration (a = ( vf - vi ) / t. Therefore, F =( m v ) / t. F t = m v and F t is impulse.

J = Ft

J = mv

J = p

Earth's magnetic field protects from solar wind, aids navigation with a compass, and creates the Aurora Borealis. the correct options are c & d.

Earth's magnetic field protects humans from harmful solar wind by deflecting most of it, preventing damage to life on Earth. The magnetic field also aids navigation through the use of a compass, guiding people in finding direction accurately.

The Aurora Borealis, or Northern Lights, is an awe-inspiring light display resulting from disturbances within Earth's magnetic field caused by solar storms.

The magnitude of the resulting acceleration is 0.265 m/sec².

The rate at which an item changes its velocity is known as acceleration, a vector quantity. If an object's velocity is changing, it is acceleration.

The net acceleration that objects get as a result of the combined action of gravity and centrifugal force is known as the Earth's gravity, or g. It is a vector quantity whose strength or magnitude is determined by the norm and whose direction correlates with a plumb bob.

Given the magnitude of the vectors f~ is 27 n, the force on the right is applied at an angle 58◦ and the the mass of the block is 54 kg. 54 kg f 58 ◦ f if the surface is friction less,

F cos(58) = ma

14.30 = 54.a

a = .265 m/sec²

The magnitude of the resulting acceleration is 0.265 m/sec².

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a. The force applied would be equal to the frictional force.

F = us Fn

where, F = applied force = 35 N, us = coeff of static friction, Fn = normal force = weight

35 N = us * (6 kg * 9.81 m/s^2)

us = 0.595

b. The force applied would now be the sum of the frictional force and force due to acceleration

F = uk Fn + m a

where, uk = coeff of kinetic friction

35 N = uk * (6 kg * 9.81 m/s^2) + (6kg * 0.60 m/s^2)

uk = 0.533

The coefficient of static friction between the box and the floor is 0.60

The value of coefficient of kinetic friction is 0.061

Given data:

The magnitude of force to start the box is, F = 35.0 N.

The mass of box is, m = 6.0 kg.

The magnitude of acceleration is, [tex]a = 0.60 \;\rm m/s^{2}[/tex].

(a)

The force due to static friction is given as,

[tex]f = \mu mg[/tex]

Here, [tex]\mu[/tex] is the coefficient of static friction.

Solving as,

[tex]35.0= \mu \times 6 \times 9.8\\\mu \approx 0.60[/tex]

Thus, the coefficient of static friction between the box and the floor is 0.60.

(b)

If box accelerates, the frictional force comes to play to oppose the motion. Therefore,

[tex]f = F\\\mu_{k} \times m\times g = ma\\\mu_{k}\times g = a\\\mu_{k}\times 9.8 = 0.60\\\mu_{k} = 0.061[/tex]

Thus, the value of coefficient of kinetic friction is 0.061.

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Assuming that they are pulling the space shuttle straight up, and that this is done on the surface of the earth, where gravity is equal to 9.8 m/s^2. So taking the average pull force of a person to be 110 kg, then: 

110 kg/person * 9.8 m/s^2 = 1078 kg*m/s^2, or 1078 N/person (Newtons).

1 Newton is about 0.225 lb. So, 1078 N/person * 0.225 lb/N = 242.34 lb/person. 

So if the space shuttle weighs 4,500,000 lb, then it would take 4,500,000 lb / (242.34 lb/person) = 18,569 people.

Answer:

18,569 people

This problem involves a bird flying with a force of 11N against an air resistance of 2N. In the vector diagram, the bird's force is represented as an upward arrow of length 11, and the air resistance as a downward arrow of length 2. The net force is 9N, represented by an upward arrow of length 9, which indicates the direction and strength of the bird's motion.

In this problem, a bird is flying north with a force of 11N while the air resistance is posing a force of 2N. Given the directions, we should make a vector diagram. A vector is characterized by both magnitude (in this case, the strength of force) and direction. The magnitude is the length of the vector, while the direction shows the way the force is applied.

Let's assume the northward direction is upward. You can represent the bird's motion as an upward arrow of length 11. This represents the 11N force north. The force due to air resistance, being 2N, can be represented as a downward arrow of length 2, indicating it's acting in the opposite direction to the bird's motion.

The net force is the vector sum of these two forces. Since they are in opposite directions, you subtract the smaller from the larger, giving a net force of 9N (11N bird's force - 2N air resistance). This net force can be represented by an upward arrow of length 9, indicating the bird still continues its movement to the north.

The displacement is the distance and direction the bird has moved. This will depend on the time the bird has been flying and is not indicated in the question.

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Answer:

[tex]\frac{2}{5}[/tex]

Explanation:

Thinking process:

The weight of an object if defined as the gravitational pool on the object. This is the force that pulls an object downward. This is given as follows:

[tex]W = mg[/tex]

where w = weight (gravitational pull)

           m = mass of the object (kg)

           g  = acceleration due to gravity (m/s²)

The acceleration due to gravity on Mars is about 3.924 m/s². This is [tex]\frac{2}{5}[/tex] of the acceleration on the earth.

Therefore, the weight of the object on Mars will weigh 2/5 of what it weighs on earth.