Light falls on seap Sim Bleonm thick. The scap fim nas index +1.25 a lies on top of water of index = 1.33 Find la) wavelength of usible light most Shongly reflected (b) wavelength of visi bue light that is not seen to reflect at all. Estimate the colors

Answer:

solid to gas or gas to liquid

Explanation:

welcome

Answer:

solid to gas or gas to liquid

Explanation:

Edge

If the capacitor is placed in the closed circuit and one of the wires in the circuit is cut, only the voltage across the capacitor changes. The answer is c.

In a capacitor circuit, the voltage across the capacitor is related to the charge on the capacitor and the capacitance by the equation Q = CV, where Q is the charge on the capacitor, C is the capacitance, and V is the voltage across the capacitor.

When the wire in the circuit is cut, the charge on the capacitor remains constant because the capacitor acts like an open circuit, preventing the flow of current.

However, the voltage across the capacitor changes because the circuit is now incomplete, and there is no longer a closed path for the current to flow. The voltage across the capacitor will discharge over time due to its internal resistance until it reaches zero.

Therefore, option C is correct, and only the voltage across the capacitor changes.

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The liquid with greater thickness will be more viscous since it flow speed is lower. Therefore, the more thick liquids is more viscous and flow slowly.

Viscosity of a liquid is the resistance to its flow. Viscosity depends on the density and thickness of the liquid. The more thicker the liquid the more viscous it will be.

Less thick liquids will flow fastly. For example water is a less viscous liquid as we see it flow so quickly. Whereas, honey, oil, etc are more viscous and the mobility of their liquid particles are resisted by viscosity.

The more viscous liquids generally has higher specific heat capacity as in the case of water and oil. The particle - particle attractive force is higher in highly viscous liquids.

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Assuming that "some" refers to a certain quantity or amount of something, and "the" refers to that same thing, it seems that there is a specific amount of something present at the beginning of a given time interval, but by the end of that interval, all of it has disappeared.

There are a few possible explanations for why this might be the case. One possibility is that the thing in question is subject to decay or decomposition, meaning that it breaks down or dissolves over time. In this scenario, the initial amount of the substance would gradually decrease until it was completely gone by the end of the interval.
Another possibility is that the thing in question is being actively removed or consumed over the course of the time interval. For example, if "some" refers to a food item, it could be that the food is being eaten or otherwise used up by people or animals during the interval.

Without additional context or information about what "some" and "the" are referring to, it is difficult to say for sure what is happening. However, hopefully this explanation gives some insight into the possible reasons why "some" would disappear before the end of the interval.

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Photons with a frequency of 1.0 × 1020 hertz strike a metal surface. If electrons with a maximum kinetic energy of 3.0 x \(10^-^1^4^\) joule are emitted, the work function of the metal is . 3.6 x\(10^-^1^4^\) J.

The correct answer is option 3.

To determine the work function of the metal, we can use the equation:

E = hf - ϕ

where:

E is the energy of the emitted electron,

h is Planck's constant (6.626 × \(10^-^3^4\) J·s),

f is the frequency of the photons,

ϕ is the work function of the metal.

Given:

Frequency of photons (f) = 1.0 × \(10^2^0\)Hz

Maximum kinetic energy of emitted electron (E) = 3.0 × \(10^-^1^4^\) J

We can rearrange the equation to solve for the work function:

ϕ = hf - E

Substituting the given values, we have:

ϕ = (6.626 × \(10^-^3^4\) J·s)(1.0 ×\(10^2^0\) Hz) - (3.0 × \(10^-^1^4^\) J)

Simplifying the equation, we get:

ϕ = 6.626 × \(10^-^1^4^\) J - 3.0 ×\(10^-^1^4^\)J = 3.626 × \(10^-^1^4^\) J

Comparing this value to the given options, we find that the closest option is:

3. 3.6 x \(10^-^1^4^\) J

Therefore, the correct option is option 3: 3.6 x \(10^-^1^4^\)J.

This indicates that the work function of the metal, which represents the minimum energy required to remove an electron from the metal surface, is approximately 3.6 x\(10^-^1^4^\) J.

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22.4 m/s² has a radius of 36.5 m.

Acceleration is the rate of change of velocity over time. It is expressed in terms of a vector quantity, with both magnitude and direction. Acceleration can be caused by the application of a force, such as gravity, or by changing the speed or direction of an object. In physics, acceleration occurs when an object changes its velocity, either by increasing or decreasing its speed or changing its direction. Acceleration is measured in meters per second squared (m/s²).

The centripetal acceleration when running at 11 m/s around the curve of an Olympic track, which has a radius of 36.5 m, is 22.4 m/s². The formula for centripetal acceleration is: a_c = v²/r, where v is the velocity and r is the radius. Using this formula, the centripetal acceleration is 11²/36.5, which equals 22.4 m/s².

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Answer:The equation is balanced for both charge and nucleon number, as required.

Explanation:2713Al + 42He → 3015P + n

Work was done on the train 225x10⁵ J

Power exerted by the train 1.07 x 10⁵ W

Work is the amount of energy transferred to an object when it is moved a certain distance by an external force. Since work is defined as the amount of energy (transferred), it has units of energy, and work usually has units of J (joules). The equation describing the work (W) done on a body moving a distance (s) while a force (F) is acting on it in the same direction as its motion is given by:

W = F × s

Where,

W = work done

F = force applied

s = displacement

We can define force as the rate of work. It is work done in a unit of time. The SI unit for power is the watt (W), which is the joule per second (J/s). The formula for power is:

P = W / t

Where,

P = Power

W = work done

t = time taken

Now for the given question:

W = F × s

F = 5.0x10⁴ N

s =  450.0 meters

W = 5.0x10⁴ x 450.0

W = 225x10⁵J

P = W / t

P = \(\frac{225}{210}\) x10⁵

P =1.07 x 10⁵ W

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ANSWER

EXPLANATION

If force F keeps the object in equilibrium

Answer:

See below

Explanation:

Find the x components of all of the forces shown, add them together, the x-component of the force F will be exactly opposite ( same magnitude but 180 degrees different)

30 cos 55  +     40 cos 205   +   50 cos 320  =  19.26    <====x component sum of all of the forces shown

F  (the x component of ) will be   Either    - 19.26   At zero degrees

                                                                 Or 19.26 at 180 degrees

Answer:

The speed of light is used for the measurement of the time in space

Answer:

10.61 m/s

Explanation:

To find the final speed, we will use the conservation of momentum in each direction, so we can write the following equations:

Where m1 and m2 are the mass of the vehicles, v1 and v2 are their respective velocities in each direction, and Vfx and Vfy are the final velocities in each direction.

If one of the vehicles is headed north, its horizontal velocity Vx = 0 m/s. In the same way if the other is headed east, its vertical velocity Vy = 0m/s

Therefore, we can replace the values and solve the first equation as:

In the same way, we can solve the second equation as:

Now, we know that the vertical and horizontal speed was 7.5 m/s. So, we can calculate the final speed using the Pythagorean theorem as:

So, the speed after the collision was 10.61 m/s

a. The translational kinetic energy of this system ( K trans) is 3462.112 J

b. The kinetic energy of this system relative to the center of mass (Krel) is  (-4720.612, -357.112, -2463.112) J

To find the total kinetic energy of the system, we need to calculate the kinetic energy of each particle and add them together.

The kinetic energy of a particle is given by:

K = 1/2 mv^2

where m is the mass of the particle and v is its velocity.

For particle 1:

K1 = 1/2 * 3 kg * (7, -4, 14) m/s^2 = (73.5, -42, 220.5) J

For particle 2:

K2 = 1/2 * 7 kg * (-13, 12, -3) m/s^2 = (-318.5, 252, -31.5) J

For particle 3:

K3 = 1/2 * 5 kg * (-29, 34, 18) m/s^2 = (-1012.5, 2895, 810) J

The total kinetic energy of the system is the sum of the kinetic energies of the particles:

Ktot = K1 + K2 + K3

= (73.5 - 318.5 - 1012.5, -42 + 252 + 2895, 220.5 - 31.5 + 810) J

= (-1257.5, 3105, 999) J

To find the translational kinetic energy of the system, we need to find the velocity of the center of mass and use it to calculate the total kinetic energy of the system as if all the mass were concentrated at the center of mass.

The velocity of the center of mass is given by:

Vcm = (m1V1 + m2V2 + m3V3) / (m1 + m2 + m3)

where V1, V2, and V3 are the velocities of the particles, and m1, m2, and m3 are their masses.

Plugging in the values, we get:

Vcm = (3 kg * <7, -4, 14> m/s + 7 kg * <-13, 12, -3> m/s + 5 kg * <-29, 34, 18> m/s) / (3 kg + 7 kg + 5 kg)

= (-215/15, 242/15, 111/15) m/s

= (-14.33, 16.13, 7.4) m/s

The total kinetic energy of the system as if all the mass were concentrated at the center of mass is given by:

Ktrans = 1/2 (m1 + m2 + m3) |Vcm|^2

Plugging in the values, we get:

Ktrans = 1/2 (3 kg + 7 kg + 5 kg) |(-14.33, 16.13, 7.4) m/s|^2

= 1/2 (15 kg) (461.0149 m^2/s^2)

= 3462.112 J

To find the kinetic energy of the system relative to the center of mass, we need to subtract the translational kinetic energy from the total kinetic energy:

Krel = Ktot - Ktrans

= (-1257.5, 3105, 999) J - 3462.112 J

= (-4720.612, -357.112, -2463.112) J

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Given:

The mass of the car is m = 1725 kg

The initial velocity of the car is

The final velocity of the car is

The time is t = 4.4 s

To find the applied force.

Explanation:

The force can be calculated by the formula

Here, a is the acceleration.

The acceleration can be calculated as

On substituting the values, the force applied will be

Thus, the applied force is 3527.625 N

A primary key is a database table's unique identifier. This key distinguishes each row in a table from the others.

There are certain things that should not be used as a primary key in a table.

One such thing is: Meaningful names should not be used as a primary key in a table.

A primary key is a database table's unique identifier. It distinguishes one row from another in a table.

The primary key can also be used to connect with other tables. It has a different value for each row in a table.

The primary key can be one or more columns. It can be a single column or a collection of columns.

It can't have a null value. It must always be unique and never change in a table.

The following should not be used as a primary key in a table:

Meaningful names: Avoid using a meaningful name as a primary key.

Because when the column name changes, the primary key will also change.

For example, if you're using a student's name as the primary key, you'd have to update it every time the student's name changes. It's not a good idea to use meaningful names as primary keys.

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Answer:

The silk has become negatively charged

Vapor locks can cause a variety of issues in a vehicle.

When vapor lock occurs, it can lead to the engine running roughly or even stalling. This happens because the fuel vaporizes before it reaches the engine, causing a lack of fuel and thus a lack of power. Additionally, vapor lock can cause the power steering and brake fluid to evaporate, leading to a loss of control over the vehicle's steering and brakes. The vehicle's interior may also become steamy as the vapor remains trapped inside. To prevent vapor lock from occurring, it's important to ensure that the vehicle's fuel system is functioning properly and that there is adequate ventilation to prevent the buildup of excess heat and pressure.

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Answer:

Mass of the truck is \(1154\) Kg

Explanation:

As we know that

Force is the product of mass and acceleration.

F = m * a

Here acceleration, a \(= 39\)  m/s^2

Force, F \(= 45000\) Newton

Mass = \(\frac{F}{a}\)

Mass

\(= \frac{45000}{39} \\= 1154\) Kg

EAC( Low-energy lightbulb )=18.47 EAC( Conventional lightbulb )=7.33 Conventional lightbulb is cheaper to operate. Option D

To calculate the Equivalent Annual Costs (EAC), we need to consider the initial cost, maintenance costs, and the present value of future costs, taking into account the discount rate.

The EAC (Equivalent Annual Cost) is calculated by summing up the annual costs of the lightbulb over its lifetime, discounted at the real discount rate of 4%.

For the low-energy lightbulb:

EAC = Cost of bulb + Present value of annual electricity cost

= $3.60 + ($2.00 / (1 + 0.04)^1) + ($2.00 / (1 + 0.04)^2) + ... + ($2.00 / (1 + 0.04)^9)

≈ $18.47

For the conventional lightbulb:

EAC = Cost of bulb + Present value of annual electricity cost

= $0.60 + ($7.00 / (1 + 0.04)^1) + ($7.00 / (1 + 0.04)^2) + ... + ($7.00 / (1 + 0.04)^1)

≈ $7.33

Since the EAC for the low-energy lightbulb is $18.47 per year and the EAC for the conventional lightbulb is $7.33 per year, the conventional lightbulb is cheaper to operate assuming a burnt-out bulb is replaced by an identical bulb.

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Explanation:

Hey there!

Universal gravitation constant (g) is the force of gravitation produced between two bodies of unit mass each separated by unit distance between their centers. The value of universal gravitation constant (g) is 6.67 Nm²/kg², which is constant all over the world. So, that's why it is called universal gravitation constant.

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Law of Reflection :

The law of reflection states that when light rays strike a smooth surface, the angle of reflection equals the angle of incidence, and the incident ray, reflected ray, and normal to the surface all lie in the same plane.

Here, let us consider, the ray A as the normal , as it is perpendicular to the surface of the plane mirror. When the incident ray hits the plane mirror at an angle say, θ  with the normal ( here, incident ray A) , then, θ will be  the angle of reflection.

Now if we consider all the incident rays A, B, C and D. Among them, let the ray C  make an  angle  Θ, with the normal ( here, incident ray A).

Therefore, from the image given, clearly,  θ = Θ, hence Θ is the angle of reflection, thus ray C best represents the reflected ray.

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Answer:

V = 4/3 R^3

V2 / V1 = (R2 / R1)^3 = 2^3 = 8

8.00

The volume of water in the larger balloon is 8 times greater than in the smaller balloon

We'll begin by calculating the volume of each balloon.

V = 4/3 πr³

V = 4/3 × 3.14 × 3³

V = 4/3 πr³

V = 4/3 × 3.14 × 6³

Finally, we shall determine how much greater the larger balloon is to the smaller balloon

Greatness => large / small

Large / small = 904.32 / 113.04

Large / small = 8

Cross multiply

Therefore, the larger balloon is 8 times greater than the smaller balloon.

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The resistance of the battery if a current of 23A flows through a circuit and the battery produces a potential difference of 9V is 0.39 ohms.

Resistance is the force that tends to oppose motion. It is measured in ohms. The resistance of a battery can be calculated using the following formula;

V = IR

Where;

According to this question, a current of 23A flows through a circuit and the battery produces a potential difference of 9V. The resistance can be calculated as follows:

R = V/I

R = 9/23

R = 0.39ohms

Therefore, 0.39ohms is the resistance of the battery.

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Answer:

has more energy, has a greater amplitude, has a higher frequency

Explanation:

The total time, in minutes, of a car that traveled 60km at a speed of 20km/hr is 3 hours.

Average speed is the rate of motion or action or specifically the magnitude of the velocity.

The average speed of a body can be calculated by dividing the distance moved by the time taken as follows:

Average speed = Distance/time

According to this question, a car traveled 60 km at a speed of 20 km/hr. The time taken can be calculated as follows:

Time = 60km ÷ 20km/hr

Time = 3hr

Therefore, the total time, in minutes, of a car that traveled 60km at a speed of 20km/hr is 3 hours.

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Answer:

F = 32.2 m

Explanation:

F = ma

F = m * 32.2

Answer:

Displacement = 7 meters

Explanation:

Given that,

Jaune moves North 15 meters, South 5 meters, then North 8 meters. We need to find the displacement of Jaune.

The attached figure shows the motion of Jaune.

We know that, Displacement = final position - initial position

Initially, Jaune traveled 15 meters due North and finally, he travel 8 meters North.

Displcement = 15 m - 8 m

Displacement = 7 m

So, the displacement of Jaune is 7 meters.

To determine the magnitude and direction of the magnetic field produced by a current-carrying wire in Investigation 1, you can use Ampère's Law and the right-hand rule. Ampère's Law relates the magnetic field around a closed loop to the electric current passing through that loop.

In the case of a straight wire, the magnetic field forms concentric circles around the wire, with the field's strength decreasing as you move farther from the wire.

To calculate the magnitude of the magnetic field, you can use the formula B = (μ₀ * I) / (2 * π * r), where B represents the magnetic field strength, μ₀ is the permeability of free space (4π x 10⁻⁷ Tm/A), I is the current through the wire, and r is the distance from the wire to the point where the magnetic field is being measured.

For determining the direction of the magnetic field, you can use the right-hand rule. If you point your thumb in the direction of the current and curl your fingers, your fingers will wrap around the wire in the direction of the magnetic field. This means that if the current flows upward, the magnetic field will rotate clockwise around the wire when viewed from above.

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Answer:

Explanatioit cn: