three photons with wavelength 505 nm striking the retina of an eye. What is the total energy of the photons striking the eye

Answer:

8 meters

Explanation:

Frequency of waves =  5 waves / 4 s = 1.25 Hz

speed = frequency * wavelength

speed/ frequency = wavelength

  10 / 1.25 = 8 m

Answer:

\(0.62\:\mathrm{s}\)

Explanation:

Since the universal SI unit for velocity is meters/second, let's convert ft/s to m/s:

\(10\:\mathrm{ft/s}=3.048\:\mathrm{m/s}\)

We can use the following kinematics equation to solve this question:

\(v_f=v_i+at\)

What we know:

Solving for \(t\):

\(-3.048=3.048+(-9.8t),\\-6.096=-9.8t,\\t=\frac{-6.096}{-9.8}\approx \boxed{0.62\:\mathrm{s}}\)

Answer:

The mass number of carbon atom is 6+6=12

Answer:

It must be 225 J.

Explanation:

According to

Work done = Force × distance travelled

                    =  75      × 3

                    = 225 J

This answer is taken so since no angles are stated in the question.

When solar radiation is enters Earth’s atmosphere it absorbed or reflected as it travels to the earth's surface.

The electromagnetic radiation that the sun emits is known as solar radiation, sometimes referred to as the solar resource or just sunshine. With the use of various technologies, solar radiation may be absorbed and converted into usable forms of energy like heat and electricity.

When solar radiation penetrates the earth's atmosphere, it travels and collides with the ground. The earth absorbs some of the rays, while the remainder are reflected back into the atmosphere. A layer of gas called a blanket of greenhouse gases in the atmosphere absorbs some of the reflected rays, while a minute fraction escapes back into space.

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Answer:

The ability of a substance to dissolve into another, called the solvent.

Explanation:

That is why water is called "the universal solvent."

Because it can dissolve almost anything.

The speed and temperature have nothing to do with solubility.

Answer:

the ability of one substance to dissolve in another

Explanation:

Answer:

1100 kg

Explanation:

500 lb x 2.20lb (1kg) =1100kg

Answer:

C. tiny particles called charges flowing through the wires.

Explanation:

An electric current is a stream of charged particles, such as electrons or ions, moving through an electrical conductor or space. It is measured as the net rate of flow of electric charge through a surface or into a control volume.

Hope it helps!

Answer:

c

Explanation:

electric current is tiny particles called charges flowing through the wires
pls mark me brainliest :)

The mass-to-light ratio greater than one for a galaxy indicates that the galaxy contains a significant amount of non-luminous, or dark, matter in addition to the visible stars and gas. This high ratio suggests that the mass of the galaxy is dominated by dark matter, which does not emit or absorb light.

The mass-to-light ratio is a useful tool for astronomers to understand the composition and distribution of matter in galaxies. It is calculated by dividing the total mass of a galaxy by its luminosity. A ratio of much greater than one signifies that the mass of the galaxy is not entirely accounted for by its visible components, such as stars, gas, and dust. This additional mass is attributed to dark matter, a mysterious substance that makes up a significant portion of the universe's total mass. Dark matter does not interact with light, making it challenging to detect and study.

A high mass-to-light ratio in a galaxy has significant implications for our understanding of the cosmic structure and the nature of dark matter. It provides strong evidence for the existence of dark matter, as the excess mass cannot be accounted for by ordinary matter alone. Furthermore, it influences the formation, evolution, and stability of galaxies, as dark matter plays a crucial role in shaping the gravitational forces that hold galaxies together and drive their growth.

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Answer:

thatss deeeeepppp

Explanation:

xjdjdjfjd

Answer:

c 82.45 m

Explanation:

To solve this problem, we have to apply the right motion equation.

 Given parameter;

 Initial velocity  = 90mph

 So;

 Using;

      V²  = U² - 2gh ; we can solve this problem

 V is the final velocity = 0mph

U is the initial velocity

g is the acceleration due to gravity

h is the height

 Now insert the parameters and solve;

        We need to convert from mph to m/s

          1 mph  = 0.45m/s

          90mph  = 40.5m/s

    0² = 40.5² - (2 x 9.8 x h)

      0 = 1640.25  - 19.6h

    -1640.25 = -19.6h

           h  = 83.7m

Answer:

Havent seen this one before but the explanation should help you out :)

Explanation:

There are only three atomic bonds.

Ionic bonding.

Covalent bonding.

Metallic bonding.

Answer:

3,000 m/s

Explanation:

3,000 m/s

Answer:

A vibration is the primary source of a sound.

Answer:

vibration

Explanation:

A sound is the result of a body vibrating in a medium that transmits the energy given off by the body. When a musician draws a bow across the strings of a violin, the strings vibrate and make a sound.

The absorbed dose from holding the Cs-137 source (7.05 x 10^-4 rem) is significantly higher than the average natural background radiation received in the same amount of time (3.5 x 10^-5 rem/hour).

To calculate how much radiation a person could receive in this lab, we need to use the formula: Radiation dose (in rem) = (Activity of the source in Ci) x (Exposure time in hours) x (Energy per decay in MeV) x (Conversion factor). First, we need to convert the activity of the source from μCi to Ci. We can do this by dividing 0.1 μCi by 1,000,000, which gives us 1 x 10^-7 Ci.

1. Activity conversion: 0.1 μCi * (3.7 x 10^10 decays/s per 1 Ci) = 3.7 x 10^6 decays/s 2. Total decays in 1 hour: 3.7 x 10^6 decays/s * 3600 s = 1.332 x 10^10 decays 3. Total energy released in 1 hour: 1.332 x 10^10 decays * (662 keV/decay) * (1.6 x 10^-19 J/eV) = 1.410 x 10^-5 J 4. Absorbed dose in rem:
(1.410 x 10^-5 J) / (2 kg) * (100 rem/J/kg) = 7.05 x 10^-4 rem

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Answer:

a = 7.5 [m/s²]

Explanation:

To solve this type of problem we must remember Newton's second law, which tells us that the sum of forces on a body is equal to the product of mass by acceleration.

∑F = m*a

where:

∑F = sum of forces [N]

m = mass = 0.1 [kg]

a = acceleration [m/s²]

Now replacing:

\(0.9-0.15=0.1*a\\a=7.5 [m/s^{2} ]\)

Answer:

4m/s²

Explanation:

Initial velocity (u) = 0 m/s

Final velocity (v) = 8 m/s

Time taken (t) = 2 sec

Acceleration (a) = ?

We know

\(a = \frac{v - u}{t} \\ = \frac{8 - 0}{2} \\ = \frac{8}{2} \\ = 4 \: m |s ^{2} \)

Hope it will help :)

Answer:

i hate thissssssss schoooool

Explanation:

Answer:

Your mass is the same no matter where you go in the universe; your weight, on the other hand, changes from place to place. Mass is measured in kilograms; even though we usually talk about weight in kilograms, strictly speaking it should be measured in newtons, the units of force

In summary, mass is a measure of how much matter an object contains, and weight is a measure of the force of gravity acting on the object. ... The amount of gravity is directly proportional to the amount of mass of the objects and inversely proportional to the square of the distance between the objects.

Explanation:

(a) The work done by tension is 0 J.

(b) The work done by gravity is -30.7 J.

(c) The work done by the normal force is 0 J.

(d) The increase in thermal energy of the crate and incline is 30.7 J.

(a) The tension in the rope is perpendicular to the displacement of the crate, so the work done by tension is zero. This is because work is defined as the dot product of force and displacement, and when the angle between the force and displacement vectors is 90 degrees, the work done is zero.

(b) The work done by gravity can be calculated by considering the component of the weight of the crate that acts along the incline. The gravitational force can be split into two components: one parallel to the incline (mg * sin θ) and one perpendicular to the incline (mg * cos θ). The work done by the component parallel to the incline is given by the formula W = force * distance * cos θ. Substituting the values, we get W = (-mg * sin θ) * distance * cos θ = -30.7 J.

(c) The normal force exerted by the incline is perpendicular to the displacement of the crate, so the work done by the normal force is zero.

(d) The increase in thermal energy of the crate and incline is equal to the negative of the work done by gravity. This is due to the conservation of mechanical energy. The work done by gravity is negative because the force of gravity acts opposite to the displacement of the crate. Therefore, the increase in thermal energy is 30.7 J.

It's important to note that the negative sign in the work done by gravity indicates that work is done against gravity, resulting in a decrease in the mechanical energy of the system. The increase in thermal energy represents the energy dissipated as heat due to friction between the crate and the incline.

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The correct answer is (B) No because the box of greater mass requires more force to reach the same acceleration.

According to Newton's second law of motion, the force exerted on an object is directly proportional to its mass and acceleration (F = ma). Therefore, when the same force is applied to two objects with different masses, the object with a greater mass will experience a smaller acceleration compared to the object with a smaller mass.

In this scenario, although both boxes appear to float at rest in the orbiting space station, they still have different masses.

Therefore, applying the same force to both boxes will result in different accelerations. The box with greater mass will require more force to achieve the same acceleration as the box with a smaller mass.

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Answer:the light from an astronomical source can consist of a continuous spectrum, an emission (bright line) spectrum, or an absorption (dark line) spectrum. Because each element leaves its spectral signature in the pattern of lines we observe, spectral analyses reveal the composition of the Sun and stars.

Explanation:

In general, the most prevalent ways of electrical wire bonding are:

Soldering, Wire nuts, Crimping, Terminal blocks, Heat shrink tubing.

Soldering is the process of melting a metal alloy, such as tin or lead, onto wires to form a permanent, low-resistance link. Soldering is frequently used to join fragile or thin wires.

Wire nuts are twist-on connectors that are often used for connecting wires. They are available in a variety of sizes to accommodate various wire gauges and may be quickly removed if necessary.

Crimping is the process of pressing a metal connection onto a wire using a specific tool to produce a strong bond. This technique is frequently utilised in automotive and maritime applications.

Terminal blocks are used to join together many wires. They are made up of a metal strip and screws that keep the wires in place.

Heat shrink tubing is a form of plastic tubing that contracts when heated. It is useful for insulating and protecting splices and connectors.

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The period of a pendulum is determined by its length and the acceleration due to gravity. According to the equation for the period of a simple pendulum:

T = 2π√(L/g)

where T is the period, L is the length of the pendulum, and g is the acceleration due to gravity.

If the length of the pendulum is decreased to half of the original length and the mass is doubled, the period of the pendulum will remain the same on Earth. This is because the effect of changing the length and mass of the pendulum cancels out each other's influence on the period.

However, it's important to note that this assumes the acceleration due to gravity remains constant. In reality, the acceleration due to gravity varies slightly with location on Earth, so there may be small variations in the period of the pendulum at different locations.

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After the switch is closed, the plate of the capacitor that eventually becomes positively charged depends on the configuration of the circuit. There are two possible configurations: series and parallel.

Therefore, in both series and parallel configurations, the plate connected to the positive terminal of the voltage source eventually becomes positively charged. The charge on the capacitor builds up gradually until it reaches its maximum value determined by the voltage source and the capacitance of the capacitor.

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The acceleration of the skydiver is approximately +5.4 m/s².

We can use Newton's second law of motion, which states that the net force acting on an object is equal to its mass times its acceleration:

Net force = mass x acceleration

In this case, the net force is the force due to gravity minus the force due to air resistance:

Net force = force due to gravity - force due to air resistance

So we have:

(700 N) - (322 N) = (70 kg) x acceleration

Simplifying this equation, we get:

378 N = (70 kg) x acceleration

To find the acceleration, we can divide both sides by the mass:

acceleration = 378 N / (70 kg)

acceleration = 5.4 m/s²

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(a) The minimum speed necessary for a spacecraft to escape the solar system if it starts at the Earth's orbit is about 42.1 km/s. (b) The speed of 34.7 km/s achieved by Voyager 1 is not enough to escape the solar system at any distance from the Sun.

(a) This speed is also known as the escape velocity, which is the velocity required for an object to overcome the gravitational pull of a celestial body. In this case, the escape velocity is the speed required for a spacecraft to escape the Sun's gravitational pull and continue on a trajectory out of the solar system.

(b) Voyager 1 achieved a maximum speed of 125,000 km/h or approximately 34.7 km/s. However, this speed alone is not enough to escape the solar system. The spacecraft needed additional gravitational assists from Jupiter and Saturn to reach a speed of about 61.2 km/s, which is sufficient to escape the solar system. Therefore, the speed of 34.7 km/s achieved by Voyager 1 is not enough to escape the solar system at any distance from the Sun.

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