calculate the size on the retina of a 1 cm object placed 25cm from the eye. assume the diameter of the eye is 17mm

Answer:

When covalent compounds dissolve in water, they break apart into molecules, but not individual atoms. Water is a polar solvent, but covalent compounds are usually nonpolar. This means covalent compounds typically don't dissolve in water, instead, it makes a separate layer on the water's surface.

Explanation:

I don't understand the second part but hope this helps.

Answer:

mechanical advantage

Explanation:

i got it right on edge :)

Let west be the negative direction, and east be positive. Then the total momentum of the system is conserved such that

(3.00 kg) (-2.00 m/s) + m (1.50 m/s) = 0

Solve for m :

m = (3.00 kg) (2.00 m/s) / (1.50 m/s) = 4.00 kg

The current is approximately 1.912 A.

To calculate the current, you need to divide the charge passing through a point in the circuit by the time it takes for the charge to pass.

Given that 3.29 coulombs (C) of charge pass a point in the circuit every 1.72 seconds (s), you can calculate the current as follows:

Current = Charge / Time

Current = 3.29 C / 1.72 s

Current ≈ 1.912 A (Amperes)

Here's some additional information about electric current:

Electric current is the flow of electric charge through a conductor. It is measured in units called Amperes (A). Current is caused by the movement of electrons in a circuit. When a voltage source, such as a battery or power supply, is connected to a closed circuit, it creates a potential difference that allows electrons to move.

The current in a circuit can be either direct current (DC) or alternating current (AC). In DC, the flow of electrons is in one direction, while in AC, the flow of electrons alternates periodically in both directions. The standard household electrical supply is typically AC.

The amount of current in a circuit depends on two factors: the voltage (potential difference) applied across the circuit and the resistance of the circuit. According to Ohm's Law, the current (I) is equal to the voltage (V) divided by the resistance (R):

I = V / R

Ohm's Law helps determine the relationship between voltage, current, and resistance in a circuit.

Current can be measured using an ammeter, which is a device designed specifically for measuring electric current. The ammeter is connected in series within the circuit, allowing the current to flow through it and providing a reading of the current.

It's important to note that excessive current can lead to overheating, electrical hazards, and damage to components. Therefore, it is crucial to design and use electrical circuits within the specified current ratings and safety guidelines.

Understanding the concept of current is essential in various fields, including electrical engineering, physics, and electronics, as it forms the basis for studying circuits, power systems, and electrical devices.

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Answer:

i would say yes or no but im postive its yes because my pc heats up to like 460 when i use it so much

Answer:

i would say yes or no but im postive its yes because my pc heats up to like 460 when i use it so much

Explanation:

Balloon A is positively charged, and balloon C is negatively charged. If balloon A approaches balloon C, there will be an electrostatic force of attraction between them.

When two objects carry opposite charges, they exert an attractive force on each other. This force is known as the electrostatic force and follows Coulomb's law. According to Coulomb's law, the magnitude of the electrostatic force between two charged objects is directly proportional to the product of their charges and inversely proportional to the square of the distance between them. In this scenario, since balloon A is positively charged and balloon C is negatively charged, they have opposite charges. Therefore, the electrostatic force between them will be attractive. The magnitude of the force depends on the charges of the balloons and the distance between them. It is important to note that without specific information about the charges of the balloons and their distance, it is not possible to determine the exact magnitude of the force. To calculate the force, you would need the values of the charges and the distance between the balloons.

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Answer:

In mathematics, an ellipse is a plane curve surrounding two focal points, such that for all points on the curve, the sum of the two distances to the focal points is a constant.

I don’t know how ellipse change tho sorry

The critical angle for totally internal reflection can be determined by considering the refractive index of the medium. In this case, where a diver shines a searchlight at the surface of a pond with a refractive index of 1.33, the critical angle can be calculated.

The critical angle is the angle of incidence at which light traveling from a medium with a higher refractive index to a medium with a lower refractive index undergoes total internal reflection. To find the critical angle, we can use Snell's law, which states that the ratio of the sine of the angle of incidence to the sine of the angle of refraction is equal to the ratio of the refractive indices of the two media.

For total internal reflection to occur, the angle of refraction must be 90 degrees, meaning the light is reflected back into the same medium. In this case, the light is traveling from the pond (refractive index = 1.33) to the surrounding medium (presumably air, refractive index = 1).

By substituting the values into Snell's law, we can solve for the critical angle:

sin(critical angle) = n2/n1

sin(critical angle) = 1/1.33

critical angle = sin^(-1)(1/1.33)

Using a calculator, the critical angle is approximately 49.76 degrees.

Therefore, the critical angle (relative to the normal line) for totally internal reflection in this scenario is approximately 49.76 degrees.

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Given that the mass of the ball is m = 0.57 kg.

The speed of the ball is

A) The kinetic energy at point A will be

B) Given that the kinetic energy,

The ball's speed at point B will be

C) The total work done on the ball to move from point A to B is

The speed of a sound wave moving through water with a frequency of 256 Hz and a wavelength of 5.77 m is 1479.12 m/s.

To find the speed of a sound wave can be calculated using the formula:

speed = frequency x wavelength.

Given that the frequency of the sound wave is 256 Hz and the wavelength is 5.77 m, we can plug in these values into the formula:

speed = 256 Hz x 5.77 m

Simplifying this equation, we get:

speed = 1479.12 m/s

Therefore, the speed of the sound wave moving through water is approximately 1479.12 m/s.

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The main advantage of hydroelectric energy is the fact that it is a renewable energy source (Option C).

Hydroelectric energy refers to the energy from water bodies that can be used to generate electricity.

Hydroelectric energy is stored as potential energy and then converted to kinetic motion energy to be converted into electricity.

Hydroelectric energy is renewable because it is indefinitely generated by water bodies in nature.

In conclusion, the main advantage of hydroelectric energy is the fact that it is a renewable energy source (Option C).

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\( \sf{\blue{❀} \: \pink{ \huge{ \underline{A \orange{n} \red{s} \green{w} \purple{e} \pink{{r}}}}}}\)

\( \: \)

Now, According to Ohm's law,

\( = > \sf \: V=IR\)

\( \sf{ = > \: R= \frac{V}{1} }\)

\( \sf = > \:R= \frac{230}{0.1} \)

\(= > \boxed{ \sf{ \: \green{ R= \pink{2300 Ω}}}}\)

\( \: \)

hope it's helps!.. :)

Completing the sentence given ; Only the most reactive metals react with water

Reactivity of metals is a chemical property that measures the rate at which metals easily loses their electrons in substances to form a positive ion in a substance.

The most reactive metals react vigorously with water while the least reactive metals does not react with water and dilute acids vigorously but they slowly react with oxygen.

Examples of very reactive metals are :

Hence we can conclude that Only the most reactive metals react with water.

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Answer:

True

Explanation:

Answer and Explanation:

True I believe bc if you put a certain amount of force on an object it'll move and depending on where you place the force on the object it'll move in that direction. How much force and how much weight the object has will determine the speed...

The acceleration experienced by the crate is approximately 0.844 m/s

Weight of the crate:

Weight = mass × acceleration due to gravity

Weight = 114 kg × 10 m/s^2

Weight = 1140 N

Force of friction:

Force of Friction = coefficient of friction × normal force

Force of Friction = 0.541 × 1140 N

Force of Friction ≈ 616.74 N

Net force:

Net Force = Applied Force - Force of Friction

Net Force = 713 N - 616.74 N

Net Force ≈ 96.26 N

Acceleration:

Acceleration = Net Force / mass

Acceleration = 96.26 N / 114 kg

Acceleration ≈ 0.844 m/s

Therefore, the acceleration experienced by the crate is approximately 0.844 m/s

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Answer: 7.51

Explanation: Acellus

The charges on each plate are acquired is 4.403×10⁻¹⁹ C if the two plates are separated by 2.42×10⁻⁵ m with an area of 8.22×10⁻⁴ m².

It is defined as the energy required in moving the unit's positive charge from one point to another. It is obtained from the ratio of the charge and distance. The unit of electric potential is Volt(V)

The electric potential between the parallel plates is obtained from the product of the Electric field and the distance of separation between the plates.

From the given,

Area of the plates, A = 8.22×10⁻⁴ m²

Distance of separation (d) = 2.42×10⁻⁵m

Voltage (V) = 25 V

Charge on the plates (Q) =?

The electric potential V = E/d, where E is the electric field and the unit of an electric field is N/C. d is the distance of separation of the plates. The electric field is the ratio of charge and area.

Electric field E = Q/ (A×ε), where A is the area of the parallel plates, and Q is the charge in the conductor. ε is permittivity in free space and is equal to 8.845×10⁻¹²C²/N.m².

The electric potential V = E/d

V = (Q/ (A×ε)) / d

  = Q / (A ×ε× d)

Q =  V×A×ε× d

   = 25×8.22×10⁻⁴×2.42×10⁻⁵×8.845×10⁻¹²

   = 4,403 × 10⁻²¹

   = 4.4 ×10⁻¹⁹C

The charge accumulated on the plates is 4.4 ×10⁻¹⁹C.

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To solve this problem, we can use the continuity equation, which states that the mass flow rate (the rate at which mass flows through a point in a system) must be constant throughout the system. In other words, the mass flow rate at point 1 must equal the mass flow rate at point 2.

The mass flow rate is equal to the density of the fluid times the flow rate (also known as the volume flow rate). The flow rate is equal to the cross sectional area of the tube times the velocity of the fluid. Therefore, we can write the continuity equation as:

\(density $*($ cross-sectional area $*$ velocity $)=$ constant\)

We can rearrange this equation to solve for the velocity at each point: \(velocity $=$ constant $($ density $*$ cross $-$ sectionalarea $)$\)

At point 1 , the velocity can be calculated as follows: $V 1=$ constant $/($ \(density $*$ A1 $)=$ constant $/\left(\right.$ density $\left.* 1.00 \mathrm{~cm}^{\wedge} 2\right)$\)

At point 2 , the velocity can be calculated as follows: \($\mathrm{V} 2=$ constant $/($ density $*$ A 2$)=$ constant $/\left(\right.$ density $\left.* 4.00 \mathrm{~cm}^{\wedge} 2\right)$\)

We can find the value of the constant by using the pressure difference between the two points and the ideal gas law:

\(P $1-\mathrm{P} 2=\left(\right.$ density $*$ velocity $\left.{ }^{\wedge} 2\right) / 2$\)

Substituting the known values, we have:

\(9.45 \mathrm{kPa}=\left(\text { density }{ }^* \mathrm{~V} 1^{\wedge} 2\right) / 2\)

Solving for , we find that the velocity at point 1 is:

V1 = sqrt(2 * 9.45 kPa / density)

Similarly, we can solve for V2:

V2 = sqrt(2 * 9.45 kPa / density) / 2 = V1 / 2

Note that the density of glycerin is not given, so we cannot calculate the exact values of V1 and V2. However, we can still determine the relationships between the velocities at the two points. Specifically, we can see that the velocity at point 2 is half the velocity at point 1.

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To find the value of Vs that will result in the power by the current source (PIs) to be -125 W,

Explanation:

1. Calculate the total resistance (Rt) in the circuit by adding R1 and R2:
  Rt = R1 + R2 = 21 Ω + 7 Ω = 28 Ω

2. Calculate the voltage (Vt) across the total resistance using Ohm's Law (V = I x R):
  Vt = Is x Rt = 5 A x 28 Ω = 140 V

3. Use the power formula (P = V x I) to calculate the power by the current source (PIs) and set it equal to -125 W:
  -125 W = Vs x Is - Vt x Is

4. Solve for Vs by rearranging the equation and factoring out the current (Is):
  Vs = (Vt - 125 W / Is)
  Vs = (140 V - 125 W / 5 A)

5. Calculate Vs:
  Vs = (140 V - (-125 W / 5 A))
  Vs = (140 V + 25 V)
  Vs = 165 V

The value of Vs that will result in the power by the current source to be -125 W is 165 V.

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Answer:

1000

Explanation:

Answer:I think it’s D

Explanation:

Conduction needs direct touch to transfer

A 0.1mm diameter glass tube is inserted into an ethyl alcohol at 20 degrees centigrade in a cup. The angle of alcohol with the tube is 0 degrees. D = 0.1 mm = 0.001m, alcohol angle is 0 degrees, ethyl alcohol

\(η=1.1×10^-3 N⋅sec/ m², s_g\)

=0.79.

We have to determine how much glycerin rises in the tube. The force that moves the liquid through the tube is the difference between the downward force of gravity on the liquid column and the upward capillary force produced by the surface tension of the liquid against the walls of the tube.

The height to which the fluid rises in a capillary tube may be measured by balancing the capillary force against the force of gravity on the column.

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A measure of mass per unit of volume. It is how much material a certain volume contains. ... If the volume of the object stays the same but the mass of the object increases then its density becomes greater.

Answer:

The runner's acceleration was \(1\ m/s^2\)

Explanation:

Constant Acceleration Motion

It's a type of motion in which the velocity of an object changes by an equal amount in every equal period of time.

Being a the constant acceleration, vo the initial speed, vf the final speed, and t the time, the following relation applies:

\(v_f=v_o+at\)

Solving for a:

\(\displaystyle a=\frac{v_f-v_o}{t}\)

The runner speeds up from vo=5 m/s to vf=9 m/s in t=4 seconds, thus:

\(\displaystyle a=\frac{9-5}{4}\)

\(\displaystyle a=\frac{4}{4}=1\)

The runner's acceleration was \(1\ m/s^2\)

Answer:

d. distance travelled

Explanation:

answer

Answer:

I do not car :D

Explanation:

The horizontal component of the force acting on the rope is 200 N and the vertical component is 550 N. Then the resultant force is 585.2 N vertically.

Force is an external agent acting on a body to change its motion or to deform it. There are various kinds of forces such as magnetic force, gravitational force, nuclear force etc.

The resultant force acting on an object depends on the magnitude and direction of all the forces acting on it.

The horizontal force = 400 N

angle of inclination = 30°

Fnet = 400 sin 30 = 200 N

Vertical force Fv = 550 N

then resultant force = √(Fh ²+Fv²)

= √(550²+200²)

= 585.2 N

Therefore, resultant force exerted on the center of the rope is 585.2 N in the vertical direction.

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Your question is incomplete. But your complete question is as follows:

A force of 400 N is exerted at an inclination of 30 degree horizontally on a rope and a force of 550 N is applied vertically. Then Calculate the magnitude and direction of the resultant force exerted on the center of the rope.

Answer:

.3m

Explanation:

Apex

0.3 is right i just got it right on the test for A P E X :D

The ratio of copper and aluminium resistance is 0,596 .The resistance of a wire depends on its material, length, cross-sectional area, and temperature. The resistivity of copper is lower than that of aluminum, which means that copper wire has a lower resistance than aluminum wire of the same length and diameter.

In this case, both wires have the same length and diameter (cross-sectional area), so the ratio of their resistances is simply the ratio of their resistivities.

The ratio of the resistances of the copper and aluminum wires is approximately 0.596.

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The claim can be Cosmetics, hygiene, and cleaning product emissions may be dangerous.

Evidence 1: Effect of Air Quality

Volatile organic compounds (VOCs), including formaldehyde, benzene, and toluene, can be found in a variety of cosmetic, hygiene, and cleaning goods. These VOCs have the potential to evaportate and cause indoor air pollution.

Environmental impact is evidence number two

Cosmetics, hygiene, and cleaning goods can have a detrimental environmental impact during manufacturing, usage, and disposal. Microplastics and certain chemicals are among the substances present in these items that may find their way into rivers and endanger aquatic life.

Evidence 3: Worker health effects

Occupational health risks can be present for workers who manufacture and produce hygiene, cleaning, and cosmetic items.

Reasoning: It is clear from the research that emissions from cosmetic, hygiene, and cleaning goods have the potential to be harmful.

Thus, this way, harmful are the emissions from cosmetics, hygiene, and cleaning products.

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