An object is located a distance of d0=19 cm in front of a concave mirror whose focal length is f=10.5 cm. A 50% Part (a) Write an expression for the image distance, d1. di= __________
Part (b) Numerally, what is this distance in cm?

Answer:

\(\huge\boxed{\sf d = 3590.76\ m}\)

Explanation:

Velocity = v = 11.5 m/s

Time = t = 312.24 s

Displacement = d = ?

d = v × t

d = 11.5 × 312.24

\(\rule[225]{225}{2}\)

The effect of weather and climate on the picture is erosion. The 3 potential solutions to the erosion are Planting of a cover crop, Build Terraces, and Create diversions to Help Drainage.

Erosion is defined as the washing away of the topmost portion of the soil which can occur due to natural causes or through the activities of man.

The natural causes of erosion is related to changes in weather and climate through rain, rivers, floods, lakes, and the ocean.

The three potential solutions to the problem of erosion include the following:

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Answer:

See Explanation

Explanation:

The question is incomplete, as there are no diagrams or options to provide more information to the question.

The general explanation is as follows:

For the object not to move

(1): The forces acting on the object must opposite each other. i.e. if force A acts at the right (or positive direction), force B will act at the left (or negative direction).

(2) The two forces must be equal.

So, for instance:

If the pair of forces are 5N and 5N in opposite directions, the object wil not move.

However, if one of the forces is greater, the object will move towards the direction of the greater force.

Answer:

The first statement appears most accurate.

The last statement also appears accurate, but it does not preclude any contradictory evidence.

The following statements accurately describe a scientific law: There is no contradictory evidence in the current body of knowledge. It is a statement that is true in many, but not all, cases. It is an observation that has been made many times.

The other statements do not accurately describe a scientific law:

"It is an educated guess about how a process occurs" describes a scientific hypothesis or theory, not a law.

"Can be updated or rejected if any contradictory evidence is found" describes the nature of scientific theories, which can be revised or discarded based on new evidence, but laws tend to remain consistent.

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The electrophorus becomes negatively charged after the procedure.

The electrophorus is a simple device consisting of a metal plate and an insulating plastic plate, and it becomes charged when the metal plate is touched with a charged object such as a rubbed piece of fur.

When the electrophorus is momentarily connected to ground, any excess positive charges are neutralized. When it is lifted off the plastic sheet, the plastic becomes negatively charged due to electron transfer from the metal plate, leaving the electrophorus with a net negative charge.

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Answer:

a closed system is when everything throughout your system is closed and connected. meaning that electricity can flow though without being interrupted or stopped. And open system is when there is a gap in the line somehwrre and not connected. meaning that electricity cant go though completly becuase there is a spot in the system where it's open and being stopped. (kinda like if you were on a bridge but theres a huge hole in it so you can go to the other side)

There are various contrast between an open and closed system as for an open system interaction of mass as well energy takes place but for a closed system only energy interaction takes place

It can be defined as the specified space under consideration for any thermodynamic process. It can have a fixed boundary as well as a moveable boundary. In a thermodynamic system mainly interaction of mass and energy takes place

There are mainly three types of a thermodynamic system

open system

closed system

isolated system

The characteristics of an open system are as follows

an open system is also known as a control volume system

The simultaneous interaction of mass and energy takes place

There is a variation in the mass of the system with time

Examples of open systems are gas turbines, the human body, and air compressor

The characteristics of a closed system are as follows

An open system is also known as a control mass system

There is no interaction of mass of the system with surroundings will take place only he interaction  of energy takes place

The mass of the system  does not change with time

An example of closed system is a simple closed water bottle without insulations

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Answer:

first blank is chemical second blank is kinetic energy

The force in Newtons that the engine need to produce is 64.5 N.

The force produced by the engine can be determined by applying Newton's second law of motion.

Newton's second law of motion, states that the force applied to an object is directly proportional to the product of mass and acceleration of the object.

This law also states that the rate of change of momentum of an object is directly proportional to the force exerted by the object.

Mathematically, Newton's second law of motion is given as;

F = ma

where;

Substitute the given parameters and solve for the force applied by the engine.

F = (5 kg)(12.9 m/s²)

F = 64.5 N

Thus, based on the mass and acceleration selected by Jonny, the engine can produce a force of 64.5 N.

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Answer:

ITS B need more characters so yessir

Answer:

Epicenter

Explanation:

The epicenter is the location of tectonic plate movement where an earthquake begins.

Answer:

Waves are caused by wind, or are created by the friction between wind and surface water

Explanation:

Answer:

just add co-ratios and then find the average.

Explanation:

Option B, C, and E are correct. First principle of motion options that address the issue include Before an item may move, it must be subjected to a net force. The inertia rule is another term for the first principle of Newton's theory of motion.

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Complete question: Inertia is an object's natural tendency to remain in constant motion or at rest. An object moving through outer space, for example, will continue moving in one direction and at a constant speed due to its inertia, if no other forces act on it. Why do planets constantly change the direction in which they move?

A. Most planets do not have any inertia, so their motion constantly changes.

B. The force of gravity acts on planets and changes the direction of their motion.

C. Each planet's inertia is constantly changing from one moment to the next.

D. There are no forces acting on the planets as they move in orbits around the Sun.

Total internal reflection occurs when a light ray hits a surface with a high refractive index at an angle larger than the critical angle. Thus, light will undergo total internal reflection only when it is refracted from a dense medium to a less dense medium at an angle greater than the critical angle.

The total internal reflection is when light waves are reflected back inside a medium instead of passing through it. The phenomenon occurs when the incident angle is greater than the critical angle that is required for the medium. Total internal reflection happens due to the changing of the speed of light when moving from one medium to another.

When a light ray goes from a more dense medium to a less dense one, it bends away from the normal, which is perpendicular to the surface. If the angle of incidence is too large, the ray never goes into the other medium but instead is reflected off the surface of the denser medium back into the original medium. This is referred to as total internal reflection.

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Answer: Im sure its 1/A

Explanation:.

A negaive ion has more electrons bound to it than protons in its nucleus.

Answer: 3889 J

Explanation:

Given

Force applied \(F=250\ N\)

the direction of application is \(\theta=45^{\circ}\) above the horizontal

If he pushes the box 22 m

Work done is given by the dot product of force and displacement

\(\Rightarrow W=F\cdot s\\\Rightarrow W=250\times 22\times \cos 45^{\circ}\\\Rightarrow W=3889\ J\quad [\text{upto four significant figure}]\)

Hence, option (d) is correct.

Answer: 105

Explanation:

Answer:

167.4

Explanation:

105+62.4

167.4 is the answer

4 signficant digits

Answer:

and the power to which the number should be raised:

1.50E2 = 1500

4.167E4 = 41,760

4.167E-4 = .0004176

Mass of the earth = 5.98 * 10^24 kg = 5.98E24 kg

Some examples of scientific notation

Answer:

hey Army

I'm B.T.S Army

안녕하세요

To answer this question, we need to use the equation for sliding friction. Sliding friction is the force that opposes the motion of a box or an object that slides across a surface.

The equation for sliding friction is:f = μNwhere:f is the force of sliding friction,μ is the coefficient of sliding friction, andN is the normal force between the box and the surface on which it is sliding.We can use this equation to find the coefficient of sliding friction when we know the force required to move the box at a constant rate.Let's use the values in the question to find the coefficient of sliding friction:

f = μNf = 6.0 N (the force required to drag the box at a constant rate)N = 18 N (the weight of the box)μ = f/Nμ = 6.0 N / 18 Nμ = 0.33 (rounded to two decimal places)

Therefore, the coefficient of sliding friction is 0.33. This means that the force of sliding friction is 0.33 times the normal force between the box and the surface. This also means that it takes more force to move the box than it does to keep it moving at a constant rate.

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We only need to multiply 5V by the amount of current the device is drawing from the port because power is equal to current times voltage.

Although the USB port is only designed to handle electricity up to 5 A, certain manufacturers may offer a higher maximum current.

The potential difference in charge between two sites in an electrical field is quantified as voltage, also known as electromotive force.

The amount of charge carriers that pass a fixed point in a unit of time via a conducting or semiconducting medium for a certain flow resistance increases with voltage, i.e., the number of charge carriers that pass a fixed point in a unit of time.

Therefore, We only need to multiply 5V by the amount of current the device is drawing from the port because power is equal to current times voltage.

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The speed of the roller coaster after 4 seconds will be 31\(\sf{ms^{-1}}\)

We know that,

\(\larger{\bf{\boxed{\boxed{v = u + at}}}}\)

where,

After putting all values

\(\implies{\sf{v = 3 + (7 \times 4)}} \\ \implies{\sf{v = 3 + 28}} \\ \bf{\implies{v = 31 \ ms^{-1}}}\)

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During the first year of life, babies go through a series of developmental milestones in terms of sounds and gestures. Here is the order of the sequence, beginning with the earliest form at the top:1. Crying: Crying is one of the first forms of communication that babies use to express their needs or discomfort.

It is a natural instinct and serves as a way to get attention and assistance from caregivers.2. Cooing: Around 2 to 3 months, babies begin to produce cooing sounds. These are soft, vowel-like sounds that babies make when they are content and happy. It is an early attempt at vocalization.

3. Babbling: Between 6 to 8 months, babies start babbling. This is when they produce repetitive syllables such as "ba-ba" or "da-da." It is an important step in language development and helps babies practice using their vocal cords.
4. Gesturing: By around 9 to 12 months, babies start to use gestures to communicate. This includes waving goodbye, pointing at objects, or reaching out to be picked up. These gestures are their way of expressing their desires and interacting with their environment.

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Answer:

One explanation may be that as a group, teenagers react more impulsively to threatening situations than do children or adults, likely because their brains have to work harder to rein in their behavior, a research team reported here yesterday at the Society for Neuroscience meeting

The slope of 3.2913 indicates that for every one degree Fahrenheit increase in temperature.

Finally, the temperature when the number of chirps is 0 is not represented by the slope or the y-intercept, but rather by extrapolating the regression line to the x-axis.

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Answer: 8000N

Explanation: since it is frictionless that means it has 100% efficiency therefore the mechanical advantage is 1 meaning the load equals to the effort

Heating and cooling curves depict temperature variations during the heating or cooling of a substance. In a heating curve, the substance undergoes a phase change while the temperature remains constant. This occurs as the substance absorbs heat, transitioning between states (solid to liquid or liquid to gas). Subsequently, the temperature resumes an upward trend as the added heat affects the substance's temperature directly. Conversely, cooling curves exhibit a reversed pattern. The substance begins at a higher temperature, gradually cooling down. Initially, the temperature remains constant as the substance releases heat, undergoing a phase change (e.g., gas to liquid or liquid to solid). After the completion of the phase change, temperature continues to decrease.

By examining heating and cooling curves, we gain valuable insights about energy requirements for phase changes and the specific heat capacity of substances. This knowledge enhances our comprehension of substance behavior throughout heating and cooling processes.

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Option C) The experiment in which the speed of the object was changed

is only statement that doesn't satisfy the given data as shown below:

The above statement can be verified using the calculation:

Formula for centripetal force(F) = \(\frac{mv^2}{r}\)

where m is mass of object , v is speed of object and r is radius of the circular motion.

For option A) when only mass of object is changed and rest all are same.

so F = k*m where k = \(\frac{v^2}{r}\) as both are constant

=> \(\frac{F_1}{F_2}\) = 4.04/8.08 = 0.5

and \(\frac{m_1}{m_2}\) = 0.1/0.2 =0.5

so \(\frac{F_1}{F_2} = \frac{m_1}{m_2}\)

similary \(\frac{F_2}{F_3} = \frac{m_2}{m_3}\) and hence data is correct for option A)

For option B) when only radius of object is changed and rest all are

same.

so F = k/r where k = \(m*v^2\) as both are constant

=> \(\frac{F_1}{F_2}\) = 4.04/8.08 = 0.5

and \(\frac{r_2}{r_1}\) = 0.3/0.6 =0.5

so \(\frac{F_1}{F_2} = \frac{r_2}{r_1}\)

so both are same , similary \(\frac{F_2}{F_3} = \frac{r_3}{r_2}\) and hence data is correct for option B

For option C) when only speed of object is changed and rest all are

same.

so F = k*\(v^2\) where k = \(\frac{m}{r}\) as both are constant

=> \(\frac{F_1}{F_2}\) = 4.04/9.09 = 0.44444

and \(\frac{v_1^2}{v_2^2}\) = 4.08/9.181 =0.44439

so ,\(\frac{F_1}{F_2}\) ≠ \(\frac{v_1^2}{v_2^2}\)

and hence data is not correct for option C

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Complete question:

A student conducts three experiments to determine how certain quantities influence the centripetal force responsible for an object to spin in a horizontal circle. The student uses one end of a string to attach the object while the other end is connected to a force sensor that allows the student to change the tension on the string, as shown in the figure. The student records data from the three experiments in the table above. Which of the following experiments, if any, collected data that do not agree with the expression for the net centripetal force on the object?

A)The experiment in which mass was changed

B)The experiment in which the radius of the circular path was changed

C)The experiment in which the speed of the object was changed

D)All the data are expected.

Answer:

A

Explanation:

It is based on the theory of J. J. Thomson