An object is rolled horizontally off a table. It lands on the floor 1 meter away from the base of the table. The height of the table is 2.5m. What is the initial vertical velocity of the object?

Answer:

the answer is 250

Explanation: took the test

Answer:

v = 49.05 m/s^2

Explanation:

Let's use the uniform acceleration equation to find our final velocity.

\(v = u + at\)

v = final velocity

u = initial velocity

a = gravitational acceleration

t = time taken

Assuming the rock is at rest initially, u becomes zero.

\(v = 0 + 9.81(5)\)

\(v = 49.05 m/s^2\)

The number of paperclips the magnet will pick when held at 15 cm away is 2 paperclips

Thus, as the distance increase, the amount of paper clips the magnet will pick will reduce. This is illustrated below

p ∝ 1 / d

p = K / d

Cross multiply

pd = constant

p₁d₁ = p₂d₂

p₁d₁ = p₂d₂

3 × 10 = p₂ × 15

30 = p₂ × 15

Divide both side by 15

p₂ = 30 / 15

p₂ = 2

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*it’s actually carpentry* two basic types of scaffolds are "self-supporting and suspended scaffolds." The correct option is c.

Self-supporting scaffolds are freestanding structures that do not require external support. They are commonly used in construction projects and are designed to provide stability and support to workers.

Suspended scaffolds, on the other hand, are suspended from an overhead structure or support system. They are typically used for tasks such as window cleaning or exterior building maintenance. They rely on ropes, cables, or other means to suspend the scaffold platform.

A. Metal and wooden: This option refers to the materials used to construct scaffolds. While metal and wooden scaffolds are indeed types of scaffolds, they do not categorize the scaffolds based on their structural characteristics or support mechanism.

B. Fixed and portable: This option categorizes scaffolds based on their mobility. Fixed scaffolds are permanently attached to a structure, while portable scaffolds are designed to be moved and set up at different locations. This categorization is based on the mobility aspect and does not provide information about the support mechanism or structural characteristics of the scaffolds.

C. Self-supporting and suspended scaffolds: This option correctly categorizes scaffolds based on their structural characteristics and support mechanism.

D. Assembled and deliverable scaffolds: This option does not provide a comprehensive categorization of scaffold types based on their characteristics. While scaffolds do need to be assembled, and some scaffolds may be delivered to the worksite, this categorization does not provide information about their support mechanism or structural characteristics.

Therefore, option c. self-supporting and suspended scaffolds is the correct option as it accurately classifies scaffolds based on their structural characteristics and support mechanism.

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According to Positive Coaching Alliance (PCA), kids need the following elements to have a meaningful experience as an athlete: positive reinforcement, a supportive environment, skill development, and enjoyable participation.

These factors contribute to the overall development, enjoyment, and motivation of young athletes.

Positive Coaching Alliance emphasizes several key elements that are important for creating a meaningful experience for young athletes. Firstly, positive reinforcement plays a vital role in building confidence and motivation. Encouragement and recognition of effort and improvement can boost athletes' self-esteem and drive to excel.

Secondly, a supportive environment is crucial. Coaches, parents, and teammates should provide emotional support, constructive feedback, and foster a culture of respect, inclusivity, and teamwork. This environment encourages athletes to develop both as individuals and as part of a team.

Thirdly, skill development is essential. Kids should be given opportunities to learn and improve their athletic abilities. Coaches and mentors should provide appropriate training, guidance, and resources to help athletes enhance their skills, knowledge, and understanding of the sport.

Lastly, enjoyable participation is emphasized. Kids should have fun and enjoy the sports they engage in. PCA believes that a positive and enjoyable experience promotes long-term participation, love for the game, and overall well-being of young athletes.

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The smallest component of a digital picture or graphic that can be shown on a digital display device is a pixel.

Thus, The fundamental logical unit in digital graphics is the pixel. A whole image, movie, piece of text, or other visible object on a computer monitor is made up of pixels.

The terms "pixel" and "picture element" both refer to the same thing. A dot or square on a computer monitor's display screen serves as the representation of a pixel. Geometric coordinates are used to construct the fundamental building pieces of a digital image or display, known as pixels.

The amount, size, and color mix of pixels varies and is measured in terms of the display depending on the graphics card and display monitor.

Thus, The smallest component of a digital picture or graphic that can be shown on a digital display device is a pixel.

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The thickness of the foil is approximately 0.07 cm if a metal has a density of 7.4 g/cm3. a rectangular thin foil of this metal measuring 2.4 cm by 6.cm has a mass of 7.42 g.

To find the thickness of the foil, we first need to calculate its volume. As the foil has a rectangular shape with length 6.0 cm and width 2.4 cm, the area can be calculated as: A = l*w

= 6.0 cm * 2.4 cm

= 14.4 cm^2

Next, we can use the formula for density to calculate the volume of the foil: density = mass / volume

volume = mass / density

Substituting the given values, we get: volume = 7.42 g / 7.4 g/cm^3

= 1.0027 cm^3

Finally, we can calculate the thickness of the foil by dividing the volume by the area: thickness = volume / area

= 1.0027 cm^3 / 14.4 cm^2

≈ 0.0697 cm

≈ 0.07 cm (rounded to two decimal places)

The thickness of the foil is approximately 0.07 cm.

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In that email, I will tell my relative in the United states that the transition to capitalism now implies that we work for longer hours with less pay.

The term capitalism means a system in which the means of production is controlled by individuals rather than by the state. Hence, monopoly is possible in a capitalist economy.

In that email, I will tell my relative in the United states that the transition to capitalism now implies that we work for longer hours with less pay and we do not have the social and job security that was once guaranteed in a socialist/communist economy.

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Answer:

Object's final momentum = 16.7 kg-m/s

Explanation:

Given that,

Impulse, J = 12.2 kg-m/s

Initial momentum, \(P_i=4.5\ kg-m/s\)

We need to find the object's final momentum. We know that the impulse is equal to the change in momentum. So,

Impulse = change in momentum

\(J=P_f-P_i\\\\P_f=J+P_i\\\\P_f=12.2+4.5\\\\P_f=16.7\ kg-m/s\)

So, the object's final momentum is 16.7 kg-m/s.

Given:

We know the relation,

→ \(Impulse = Change \ in \ momentum\)

or,

→ \(J = P_f-P_i\)

then,

→ \(P_f = J+P_i\)

By substituting the values,

        \(= 12.2+4.5\)

        \(= 16.7 \ kg-m/s\)

Thus the above answer is right.      

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The new pressure of the gas after expanding to a volume of 10.00 L is 0.75 atm. The correct answer is (a) 0.75 atm.

To find the new pressure of a gas that initially has a pressure of 2.50 atm and a volume of 3.00 L and expands to a volume of 10.00 L, we can use Boyle's Law, which states that the pressure and volume of a gas are inversely proportional when the temperature and amount of gas remain constant.

Boyle's Law formula: P1 * V1 = P2 * V2

Plug in the initial pressure (P1) and volume (V1), as well as the final volume (V2).
(2.50 atm) * (3.00 L) = P2 * (10.00 L)

Solve for the new pressure (P2).
P2 = (2.50 atm * 3.00 L) / 10.00 L

Calculate P2.
P2 = 7.50 atm / 10.00 L = 0.75 atm

After growing to a volume of 10,000 litres, the petrol has a new pressure of 0.75 atm. The appropriate response is (a) 0.75 atm.

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According to Newton's Second Law of Motion, if there is acceleration, there must be a net force acting on an object. This means that there must be an unbalanced force or a combination of forces that is causing the object to change its motion.

The magnitude and direction of the net force determine the rate of acceleration of the object. So, acceleration cannot occur without the presence of a net force.

To explain the relationship between acceleration and net force, we need to understand Newton's second law of motion.

Newton's second law states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. Mathematically, it can be represented as:

Acceleration (a) = Net Force (F) / Mass (m)

If there is acceleration, it means that there must be a net force acting on the object. This is because, according to the formula, when net force (F) is zero, the acceleration (a) will also be zero. Therefore, for an object to accelerate, there must be a non-zero net force acting on it.

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Answer:

A book on its side exerts a greater force.

Explanation:

Pressure = Force / Area

Assuming that 1kg = 10N

2kg = 20N

Area of book lying flat = 0.3m × 0.2m

                                     = 0.6m²

Pressure of book lying flat = 20N / 0.6m²

                                            = 30Pa (1 s.f.)

Area of book on its side = 0.2m × 0.05m

                                        = 0.01m²

Pressure of book on its side = 20N / 0.01m²

                                               = 2000Pa (1 s.f.)

Since 2000Pa (1 s.f.) > 30Pa (1 s.f.), a book on its side applies greater pressure than lying flat.

if sufficiently high temperatures (R) are achieved in the laboratory, nuclear fusion (S) becomes a reality, and as a result, the world's energy problems (E) will be solved.

C=  Funding for nuclear fusion will be cut.

H =  Supply of hydrogen fuel is limited.

R = Sufficiently high temperatures are achieved in the laboratory.

S =  Nuclear fusion becomes a reality.

E = World's energy problems are solved.

We then represent the statements as:

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Answer:

It has to be important to you.

-It has to be something that you are in control of.

-It has to be attainable, or able to be achieved.

-It has to be clear and specific.

-It has to have a plan.

Wellness

Wellness refers to a healthy state of being in body, mind, and emotion.

Body wellness

means eating right, exercising, and keeping your bodily systems in good health.

Mental wellness

means feeling safe and secure in your environment and at peace with your decisions and actions.

Emotional wellness

means feeling your best and having the ability to deal with many different situations.

Wellness: Setting Goals

The first step to setting a goal is defining it. Keep in mind that not everything you wish for can be a goal. When it comes to physical activity, diet, and exercise, you may wish to run a marathon before the end of the school year. However, this goal could be difficult to achieve if school ends in just a few months and you are not already training. A more reasonable goal might be to be able to run a mile in the amount of time considered healthy for your age group.

Importance of Physical Education

Physical education explores the methods, types, and benefits of physical activity for the body. In addition to staying active, making healthy choices about diet and exercise is important to overall personal and long-term health. Long-term health passed down through generations can also promote healthy family lifestyles.

Fitness

is the ability of the body to function effectively and efficiently during physical activity and is the ability to move joints through an entire range of motion.

Physical exercise

is the act of improving one's body through specific intentional movements.

differences between exercise and fitness

while anyone can exercise, only someone who exercises regularly can be fit.

Why is it important to make healthy choices about your diet and exercise?

Choosing healthy behaviors when it comes to diet and exercise is important to personal health, long-term health, and promoting healthy family lifestyles.

five components of physical education:

-Cardiorespiratory endurance

-Muscular strength

-Muscular endurance

-Flexibility

-Body composition

Explanation:

Life is WORTH LIVING

Answer: I didn’t make my schedule with a support system in mind. But, I can build a support system by finding people who can keep me on track. On the weekends, my friends can be my support system. During the week, it’s not that easy because my friends and family are so busy. I know that my mom goes for a 20-minute walk in the morning before work. Maybe I could walk with her and then work out on my own for 40 minutes afterward.

Explanation: Plato

The height of the radio antenna is approximately 36.61 meters.

To solve this problem, we can use trigonometry and the properties of right triangles. Let's draw a diagram to visualize the situation.
We have a right triangle with the radio antenna as the hypotenuse, the guy wire as one leg, and the ground as the other leg. The angle between the guy wire and the ground is given as 14 degrees.
Using trigonometric functions, we can find the length of the guy wire and then subtract it from the total height of the tower to get the height of the radio antenna.
First, let's find the length of the guy wire. We know that the opposite side (the guy wire) is the side opposite the given angle, and the adjacent side (the ground) is the side adjacent to the given angle. Therefore, we can use the tangent function:
tan(14) = opposite/adjacent
tan(14) = guy wire/48
guy wire = 48 tan(14) ≈ 12.51 m
Next, let's find the height of the radio antenna. We know that the hypotenuse (the tower) is the longest side of the right triangle, so we can use the Pythagorean theorem:
tower^2 = guy wire^2 + ground^2
tower^2 = (12.51)^2 + (48)^2
tower ≈ 49.12 m
Finally, we can subtract the length of the guy wire from the height of the tower to get the height of the radio antenna:
radio antenna = tower - guy wire
radio antenna ≈ 36.61 m
Therefore, the height of the radio antenna is approximately 36.61 meters.

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The plumb bob hangs vertically downwards when the railroad car is at rest. However, when the car moves in a circular track of radius 340 m at a speed of 94 km/h, it experiences a centrifugal force that pulls the plumb bob away from the vertical.

To find the angle relative to the vertical at which the plumb bob hangs, we need to use the formula:

tan(theta) = (v^2) / (g * r)

where:
theta = angle relative to the vertical
v = speed of the railroad car = 94 km/h = 26.11 m/s
g = acceleration due to gravity = 9.81 m/s^2
r = radius of the circular track = 340 m

Substituting the given values, we get:

tan(theta) = (26.11^2) / (9.81 * 340)
tan(theta) = 2.146

Taking the inverse tangent of both sides, we get:

theta = tan^-1(2.146)
theta = 64.7 degrees

Therefore, the plumb bob hangs at an angle of 64.7 degrees relative to the vertical when the railroad car rounds a circular track of radius 340 m at a speed of 94 km/h.

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Answer:

The battery it consider as one of the circuits elements.

A newborn infant and a doctor are pulled apart by much less gravitational force than the distance between Earth and Mars.

The gravitational force between Earth and Mars can be calculated using the formula F = G(m1m2)/r^2, where G is the universal gravitational constant, m1 and m2 are the masses of the two objects, and r is the distance between their centers. The mass of Earth is about 5.97 x 10^24 kg, the mass of Mars is about 6.39 x 10^23 kg, and the average distance between them is about 225 million km. Using these values and the formula, we can calculate that the gravitational force between Earth and Mars is about 2.7 x 10^22 N.

On the other hand, the gravitational force between a newborn baby and a doctor can be calculated using their masses and the distance between them. Assuming an average newborn baby mass of 3.5 kg and an average doctor mass of 75 kg, and a distance of 1 meter between them, we can calculate that the gravitational force between them is about 2.2 x 10^-8 N.

Clearly, the gravitational force between Earth and Mars is much greater than the force between a newborn baby and a doctor. The greater forces are between the larger and more massive objects, such as planets or stars, due to their greater masses and distances.

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Answer:

Explanation:

mass (m) = 50 kg

Force (F) = 200 N

Acceleration (a)= ?

WE know

F = m * a

200 = 50 * a

a = 200 / 50

a = 4 m/s²

Hope it will help :)

Answer:

Solubility

Explanation:

Solubility involves dissolving a substance

The required amount of heat in joules taken to raise the temperature of a 100 g piece of copper from 18°C to 35°C is calculated to be 654.5 joules.

The specific heat of copper is given as 0.385 J/g.°C.

Mass of copper m is given as 100 g.

The initial temperature is 18°C.

The final temperature is 35°C.

The relation for heat when mass of substance and its rise in temperature is specified is,

q = m c Δt

where,

q is heat

m is mass

c is specific heat of the substance

Δt is rise in temperature

So, let us put the known values into the equation,

q = m c Δt = 100(0.385)(17) = 654.5 J

Thus, the required heat is calculated to be 654.5 J.

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The energy transported by the wave increases by a factor of 9,

The energy transported by a wave is proportional to the square of its amplitude. Therefore, if the amplitude of the wave increases from 0.5 meters to 1.5 meters, the energy transported by the wave increases by a factor of

\((1.5/0.5)^2 = 9.\)

Wave amplitude is the maximum displacement or distance moved by a particle of the medium from its rest position when a wave passes through it. In simpler terms, it is the height of the wave from its equilibrium position. The amplitude is usually measured in meters (m), centimeters (cm), or sometimes in units of pressure, such as Pascals (Pa) for sound waves.

Energy transferred by a wave refers to the amount of energy that the wave carries as it travels through a medium.

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Answer:

kinetic energy

Explanation:

Answer:

I = 250N*s

Explanation:

I = F*t

I =  impulse or momentum

F = Force

t = time

I = 25N*10s

I = 250N*s

just know this is my answer but some people have the same answers so i always give creidts

ANSWERS ------> 50 Watts.

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In projectile motion, an object follows a parabolic route; this path is referred to as the object's trajectory.

Projectile motion is a type of motion experienced by an object or particle that is launched in a gravitational field, such as from the Earth's surface, and moves along a curved route solely under the influence of gravity. Projectile motion is the motion of an item hurled or projected into the air that is only affected by gravity's acceleration. The item is known as a projectile, and its course is known as its trajectory. Any object that is cast, fired, flung, heaved, hurled, pitched, tossed, or thrown is considered a projectile. Throwing a ball straight up, kicking a ball at an angle to the horizontal, or simply dropping something and letting them fall are all instances of projectile motion.

Here,

An object in projectile motion follows a parabolic path; this path is referred to as the object's trajectory.

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Answer:

parabolic

Explanation:

Answer:

Force is a fundamental concept in physics that describes the interaction between objects that causes a change in motion or shape. It is defined as a push or a pull that can cause an object to accelerate, decelerate, or deform. Force has both magnitude and direction, and it is typically measured in units such as Newtons (N) in the International System of Units (SI).

Explanation:

There are various types of forces, including contact forces and non-contact forces. Contact forces require physical contact between objects, such as pushing a book across a table or kicking a soccer ball. Examples of contact forces include friction, normal force, tension, and applied force. Non-contact forces, on the other hand, act at a distance without physical contact, such as gravitational force, electromagnetic force, and nuclear forces.

Forces can be either balanced or unbalanced. When forces on an object are balanced, the object remains at rest or moves with a constant velocity. When forces on an object are unbalanced, the object accelerates in the direction of the net force. This is described by Newton's second law of motion, which states that the acceleration of an object is directly proportional to the net force acting on it, and inversely proportional to its mass. Mathematically, this is expressed as F = ma, where F represents force, m represents mass, and a represents acceleration.

Forces play a crucial role in understanding the motion and behavior of objects in the physical world, and they are fundamental to many areas of science and engineering, including mechanics, electromagnetism, and astrophysics, among others.

Answer:

In physics, a force is an influence that causes the motion of an object with mass to change its velocity, i.e., to accelerate. It can be a push or a pull, always with magnitude and direction, making it a vector quantity.

How does the force work?

The Force is a mysterious energy field created by life that binds the galaxy together. Harnessing the power of the Force gives the Jedi, the Sith, and others sensitive to this spiritual energy extraordinary abilities, such as levitating objects, tricking minds, and seeing things before they happen.

What makes a force?

A force is a push or pull upon an object resulting from the object's interaction with another object. Whenever there is an interaction between two objects, there is a force upon each of the objects. When the interaction ceases, the two objects no longer experience the force.

How do we get force?

Multiply mass times acceleration.

The force (F) required to move an object of mass (m) with an acceleration (a) is given by the formula F = m x a. So, force = mass multiplied by acceleration.

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Pls brainliest...

Answer:

skier

Explanation:

i took the test