What two minerals would be most useful as grains on sandpaper

The different colors in a line spectrum represent the different wavelengths of light emitted or absorbed by an element. Each element has a unique line spectrum because of the arrangement of electrons in its atoms.

The different colors in a line spectrum represent the different wavelengths of light emitted or absorbed by an element. Each element has a unique line spectrum because the wavelengths of light it emits or absorbs are specific to that element. This uniqueness is due to the arrangement of electrons in the element's atoms and the energy levels they occupy.

The different colors in a line spectrum represent the different wavelengths of light emitted or absorbed by an element. Each element has a unique line spectrum because of the arrangement of electrons in its atoms.

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It doesn't flip the image, it's incredibly affordable, and the photograph is in three dimensions. The limited resolution, low amplification, and solely intended for exterior assessment are drawbacks.

A lens is a transmissive optical tool that employs refraction to focus or disperse a light beam. The power of the lens is expressed in the dioptre which is the reciprocal of the focal length of the lens.

The image formation through the lens is calculated with the help of the lens formula given as follows

1/f = 1/v - 1/u

With a high-power optical viewfinder, you can "zoom" in closer to the item being observed and observe more detail thanks to the increased degree of magnifying it offers. A lower power lens will, however, offer a larger field of view.

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Answer:

True

Explanation:

Information is data being sent and received it generally carries meaning behind it. Attention is the process by which a person can selectively concentrate on a specific part of information

If a person is sending another person information that the receiver cannot understand it is meaningless to the receiver. However, if the receiver can understand the meaning of the information then the receiver pays attention the information.

Answer:

768 N up

Explanation:

verified

To find acceleration using time and distance, you determine the change in velocity and divide it by the time elapsed. You can also use the relationship distance = velocity x time, derived from speed = distance/time. The SI units for acceleration are m/s².

To find acceleration given time and distance, you need to understand the underlying physics principle - Newton's second law of motion. Here's a step-by-step process:

Therefore, with known values of time and distance, you can find the acceleration. Remember, the SI units for acceleration are m/s² (metres per second squared).

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To find the coefficient of friction on a dry water slide, we use the fact that the bather takes one third the time to slide down when it's wet. This implies an acceleration due to friction, which we can relate back to the coefficient of friction using the right equations.

The student is trying to find the coefficient of friction on a dry slide. To do this, we need to use the equations for motion on an inclined plane. The two primary forces here are the gravitational force pulling the bather down the slide and the frictional force opposing this movement. The gravitational force, parallel component, is mg sinθ, while the frictional force is μmg cosθ. On a smooth slide, acceleration of a sliding body is given by g sinθ. When friction comes into play, the acceleration becomes g (sinθ - μ cosθ). Given that the bather's time on the slide is one third when it's wet (indicating friction is negligible), the frictional force on the dry slide was causing the bather to take three times longer due to hindrance.

To find the coefficient of friction μ, we can use these formulas. Since speed = distance/time and distance, on both wet and dry slide, stays the same, the time ratio should equate to the square root of the acceleration ratio. We can set up the equation as: √(1/3) = (sinθ - μ cosθ) / sinθ, and solve for μ.

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The plane's displacement value is 212.13  km.

After taking off, a plane travels in a straight line and ends up 190  km further east and 800.0 km farther north than it began. 

For this, we ought to apply Pythagoras's theorem. 

Distance 2 = 190^2 + 80^2 =212.13   km,

which, rounded out, equals about 212.13  km.

190^2 + 80.0^2 = 45000

[tex]\sqrt{45000}[/tex]

212.13

The plane's displacement value is 212.13  km.

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The magnitude of his accelerations of the bush baby is about 140 m/s² or 14g

Acceleration is rate of change of velocity.

[tex]\large {\boxed {a = \frac{v - u}{t} } }[/tex]

[tex]\large {\boxed {d = \frac{v + u}{2}~t } }[/tex]

a = acceleration ( m/s² )

v = final velocity ( m/s )

u = initial velocity ( m/s )

t = time taken ( s )

d = distance ( m )

Let us now tackle the problem!

Given:

h = 2.3 m

d = 0.16 m

Unknown:

a = ?

Solution:

At first we can calculate the takeoff speed of the bush baby.

[tex]v^2 = u^2 - 2gh[/tex]

[tex]0^2 = u^2 - 2 \times 9.8 \times 2.3[/tex]

[tex]u^2 = 45.08[/tex]

Next, we can calculate the acceleration in order to reach this takeoff speed.

[tex]v^2 = u^2 + 2ad[/tex]

[tex]45.08 = 0^2 + 2 \times a \times 0.16[/tex]

[tex]a = 45.08 \div 0.32[/tex]

[tex]a = 140.875 ~ m/s^2 \approx 140 ~ m/s^2[/tex]

[tex]a = 140.875 / 9.8 ~g = 14.375g \approx 14g[/tex]

Grade: High School

Subject: Physics

Chapter: Kinematics

Keywords: Velocity , Driver , Car , Deceleration , Acceleration , Obstacle

Answer:

correct answer is 3(Is it the most unusual rock in the area)

Explanation:

Option 1:

During the formation of a rock some quantity of radioactive elements mixed with it. By measuring the quantity of this radioactive element scientist can determine the age of the rock which is known as absolute age.

option 2:

Throgh scientific investigation scientist can determine the types of minerals which make up the rock

option 3:

Through scientific investigation scientist cannot determine whether the rock is the most unusual or not. It can be determine by just looking all the rock in the area.

Option 4

Through scientific investigation the weight of the rock can be determine and it can be determine whether it is the heaviest rock in the backyard.

To achieve an electric field of 1.6 kV/mm in a capacitor charged at ±4.9 µc, each plate of the capacitor must have a calculated area of 0.000345 square meters.

This problem is best solved using the equation for the electric field in a capacitor, which is given by the formula E = Q / (ε × A), where Q is the charge on one of the capacitor's plates, A is the area of the plates, and ε is the permittivity of free space. Given that the desired electric field E is 1.6 kV/mm or 1.6 × 10^6 V/m and ε typically assumes the value of about 8.85 × 10^-12 F/m (farads per meter), we can rearrange this formula to solve for A, the plate area:

A = Q / (E × ε)

Plugging in the problem's given charge Q = 4.9 µc or 4.9 × 10^-6 C (coulombs), we find:

A = 4.9 × 10^-6 C / (1.6 × 10^6 V/m × 8.85 × 10^-12 F/m) = 0.000345 m²

Therefore, each of the capacitor's plates must have an area of 0.000345 square meters to achieve an electric field of 1.6 kV/mm when charged at ±4.9 µc.

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Answer: Hi, isolines refer to lines where some quantity maintains constant.

For example, an "istoremal line" is a line where the temperature is constant, an "isobaric line" is a line where the pressure is constant.

Where constant means that, in the two examples i give you, in all the line the temperature or the pressure has the same value.

A thing that you usually can see in a whether map, is that the isolines are "closed" curves. And other thing, maybe more obvious, is that a line cant pass over other line (because this will mean that a point in the space has 2 different values of something).

Given that two cars, starting from rest, have the same acceleration and one reaches twice the velocity of the other, the car moving twice as fast will have a displacement that is four times greater.

The subject matter of this question is related to the physics concept known as kinematics, which is a branch of classical physics that studies the motion of objects without considering the causes of their motion. Specifically, this question deals with the concepts of velocity, acceleration, and displacement.

Both cars start from rest and have the same constant acceleration. But when the radar measures their velocities, car A is found to be moving twice as fast as car B. In physics, it is known that the relationship between displacement, initial velocity, acceleration, and time is given by: displacement = initial velocity * time + 0.5 * acceleration * time^2. Since the initial velocities are zero and the accelerations are the same, the displacements will be directly related to the square of the time it took for the cars to reach the measured velocities. If Car A is moving twice as fast as Car B, it would have taken longer to reach its velocity, resulting in a greater displacement.

Thus, if car A is moving twice as fast as car B, it must have taken twice the time, and because displacement is proportional to the square of time, car A's displacement is four times greater than car B's displacement.

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The number of protons and neutrons in its nucleus can be determined with the help of the following process:

Thus, the correct option for this question is C.

Protons may be defined as the type of subatomic particles that are significantly present in the nucleus of an atom along with neutrons. These subatomic particles are positively charged in nature. Protons were discovered by Ernest Rutherford.

An atomic number of an element may be characterized as the number of a chemical element in the periodic system, whereby the elements are arranged in order of increasing the number of protons in the nucleus.

The number of neutrons may be calculated with the difference between the mass number of the atom and the atomic number.

Therefore, the correct option for this question is C.

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The first movement of a classical symphony is typically composed in sonata form and features a fast tempo. The sonata form includes three sections: exposition, development, and recapitulation.

The first movement of a classical symphony is usually fast-paced and composed in a sonata form. Sonata form, also known as first-movement form, consists of three main sections: the exposition, the development, and the recapitulation. The exposition introduces the main musical themes, the development elaborates and changes these themes, and the recapitulation reprises these themes. This structure is often found in the first movements of classical symphonies, although there are exceptions.

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The value of the constant needed to complete the equation is the Rydberg constant for hydrogen, which has a value of 1.09737 × 10^7 m^-1. When expressed in joules with three significant figures, it is approximately 2.18 × 10^-18 J.

Explanation:

The constant needed to complete the equation e = constant × (1nf2−1ni2) is called the Rydberg constant for hydrogen. The Rydberg constant has a value of 1.09737 × 107 m-1. To express this constant in joules with three significant figures, we can use the conversion factor between meters and joules, which is provided as 1 meter = 1.99 × 10-25 joules. Multiplying the Rydberg constant by this conversion factor gives us a value of 2.18 × 10-18 joules.

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Answer:

A decrease in the radius and an increase in the tangential speed

Explanation:

As we know that in circular motion the acceleration towards the center of the circular path is given by the formula

[tex]a_c = \frac{v^2}{R}[/tex]

now we can say that in order to increase the acceleration of the circular motion we can change the value of speed v and radius R both

here we know that

v = tangential speed

R = radius of path

so here since speed is directly dependent on the acceleration while radius is inversely depends on the acceleration so correct answer must be

A decrease in the radius and an increase in the tangential speed

Option C depicts the same motion of an object in both position-time (x-t) and velocity-time (v-t) graphs. The straight line in x-t corresponds to constant velocity, mirrored by a horizontal line in v-t.

The pair of graphs that represents the same motion of an object is option C. In this pair, both graphs depict uniform motion with a constant positive velocity. The position-time graph (x-t) shows a straight line with a constant slope, indicating consistent motion in one direction.

The velocity-time graph (v-t) is a horizontal line at a positive value, confirming the constant velocity. These graphs align with the principles of uniform motion, where an object maintains a steady speed and moves without acceleration. The symmetry between the two graphs in option C ensures they correspond to the same motion characteristics.

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The pair of graphs that represent the same motion will illustrate equal vertical displacement over equal time intervals for both balls, regardless of their horizontal motions. One graph will show a constant horizontal displacement for the ball with initial horizontal velocity, while the other will have no such displacement for the ball at rest horizontally.

The question regarding which pair of graphs represent the same motion of an object relates to Physics, and the concept in focus is the independence of vertical and horizontal motions in two-dimensional motion.

According to the information provided, we are looking at a scenario with two balls.

One ball drops from rest while the other has an initial horizontal velocity. However, their vertical velocities and positions are identical over time, which illustrates that the vertical motion is unaffected by whether or not there is horizontal motion. Graphicals representations of such motions will show that the positions of the balls with respect to the vertical axis are the same when plotted against time.

Therefore, the graphs that represent their vertical motion will be the same (consistent vertical displacement over equal time intervals), while the horizontal motion of one ball will be represented as a constant horizontal displacement over time, and for the other ball at rest horizontally, the graph will show no horizontal displacement.

Answer:

1.8 × 102 newtons radially inward

Answer:

The centripetal force will be 180 N inward.

Explanation:

Given that,

Mass = 4.0 kg

Radius = 0.80 m

Speed = 6.0 m/s

The centripetal force is define as the mass multiplied by tangential velocity squared, divided by the radius.

The formula of the centripetal force

[tex]F = \dfrac{mv^2}{r}[/tex]

Where, m = mass

v = velocity

r = distance

We substitute the value into formula

[tex]F = \dfrac{4.0\times6.0\times6.0}{0.80}[/tex]

[tex]F= 180 N[/tex]

Hence, The centripetal force will be 180 N inward.