9. a soap bubble is 100 nm thick and illuminated by white light incident perpendicular to its surface. what wavelength and color of visible light is most constructively reflected, assuming the same index of refraction as water?

The force between charged objects decreases as distance increases and increases as distance decreases, following the inverse square law.

The magnitude of the force between two charged objects changes according to Coulomb's Law, which states that the force is directly proportional to the product of the charges and inversely proportional to the square of the distance between them.

As you increase the distance between the charged objects, the force between them decreases, and when you decrease the distance, the force increases.

This relationship is called the inverse square law because the force is inversely proportional to the square of the distance between the objects.

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Answer:

By nuclear fission

Explanation:

The sun generates enormous energy through the process of nuclear fusion.

The core or the innermost part of the sun is characterized by high temperature and pressure. These two factors cause the separation of nuclei from electrons and the fusion of hydrogen nuclei to form a  helium atom.

During the fusion process, energy is released.

The theoretical value of the free-fall acceleration experienced by the cart (at sin q = 1) is 9.8 m/s².

Free-fall acceleration, also known as the acceleration due to gravity, is the acceleration experienced by an object in free-fall near the surface of the Earth. The theoretical value of this acceleration is 9.8 m/s², which is often rounded to 10 m/s² for simplicity.

When sin q = 1, this means that the angle q is 90 degrees, or that the cart is in a vertical free-fall. In this case, the cart will experience the full force of gravity, which is equal to the theoretical value of the free-fall acceleration, 9.8 m/s².

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Answer:

p=I×B

Explanation:

If a current 'I' flows through a given element in your circuit, losing voltage 'V' in the process, then the power 'P' dissipated by that circuit element is the product of that current and voltage.

Answer:

Accurate at 99.9999746%

Explanation:

First of all, let's calculate how many seconds we have in a year which has 365 days.

1day = 24 × 60 × 60 seconds = 86400 s

Thus, for 365 days, we have;

86400 × 365 = 31536000 seconds

Now, since 1 year has 31536000 seconds, let's find the ratio of efficiency.

We are told that the watch manufacturer claims that its watches gain or lose no more than 8 seconds in a year. Thus, efficiency is given by;

Efficiency = (8/31536000) × 100% = 0.00002536783 %

Thus, it will be be accurate at;

100% - 0.00002536783% ≈ 99.9999746%

A train has an initial velocity of 44meter per second and an acceleration of 4meter per second.The final velocity after 10 seconds is 84m/s.

As we know,

Acceleration= Final velocity-Initial velocity /time.

where acceleartion = a=4m/s².

Initial velocity= u= 44m/s

let final velocity be v

Time =t = 10seconds.

Therefore, the equation is:

a=v-u/t

Substituting the values in the given equation, we get:

4=v-44/10

Now cross multiplying,

4×10 = v-44

40=v-44

40+44=v

v=84m/s

Therefore, the final velocity after 10 seconds is 84m/s.

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Answer:

horse

Explanation:

we have p=m.v

cheetah: p1=50.80=4000

horse: p2=500.80=40000

elephant: p3=5000.0=0

The 500 kg horse also running at 80 km/h  would have more momentum than others'.

The sum of a particle's mass and velocity is called momentum. Being a vector quantity, momentum possesses both magnitude and direction. According to Isaac Newton's second equation of motion, the force acting on the particle equals the time rate of change of momentum.

According to the question:

Momentum of 50 kg cheetah running at 80 km/h is = 50×80 kg.km/h

= 400 kg.km/h .

Momentum of a 500 kg horse running at 80 km/h is =  500×80 kg.km/h

= 4000 kg.km/h .

Momentum of a  5000 kg elephant at rest =  50×0 kg.km/h

= 0 kg.km/h .

Hence, The horse would have more momentum.

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The correct predictions are: "The angular momentum of disk X immediately after the collision is greater than the angular momentum of disk X immediately before the collision." and "The angular momentum of the disk X-disk Y system immediately after the collision is equal to the angular momentum of the system immediately before the collision." So, options A and D are correct.

To analyze the angular momentum of disk X and disk Y before and after the collision, we need to consider the conservation of angular momentum.

According to the law of conservation of angular momentum, the total angular momentum of an isolated system remains constant if no external torques act on it.

Before the collision:

- Disk X has an initial angular velocity of two, which means it has an initial angular momentum.

- Disk Y is held at rest, so its initial angular momentum is zero.

During the collision:

- When disk Y is lowered onto disk X, they come into contact and rotate together. In this process, there is no external torque acting on the system.

- Since no external torques are present, the total angular momentum of the system (disk X and disk Y) remains constant.

After the collision:

- As the disks rotate together with a common angular velocity, their individual angular momenta add up to form the total angular momentum of the system.

Based on the conservation of angular momentum, the correct predictions are:

A) The angular momentum of disk X immediately after the collision is greater than the angular momentum of disk X immediately before the collision.

D) The angular momentum of the disk X-disk Y system immediately after the collision is equal to the angular momentum of the system immediately before the collision.

These predictions are consistent with the principle of conservation of angular momentum, which states that the total angular momentum of an isolated system remains constant in the absence of external torques.

So, options A and D are correct.

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The space station's mass and the pull of its gravitational field on the planet(D)

Astronaut is a term for a person who has travelled to space that is derived from the Greek words for "star" and "sailor." More specifically, space travellers from the United States, Canada, Europe, and Japan are referred to as "astronauts" in the West. An astronaut is a person who has received specialised training in order to travel to space. A spaceship's astronauts may do a variety of tasks. Typically, a commander and a pilot collaborate to lead the mission. Other positions could be science pilot, mission expert, payload commander, and flight engineer.

The astronaut does highly significant scientific research on Earth to advance technological advancement in addition to gathering samples, performing tests, and making minor repairs on spaceships and space stations. The study of space and even all the efforts made to escape the gravity of Earth have led to the production of items that we use every day as well as scientific theories that have altered our perceptions of space and our understanding of the origins of life on Earth.

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The speed of the treadmill changes by 1.34 m/s after 5.6 min.

First we can use the kinematic equation:

v_f = v_i + aΔt

where

First, we need to convert the time interval to seconds:

Δt = 5.6 min × 60 s/min = 336 s

Now we can plug in the values and solve for v_f:

v_f = 0 + (0.0040 m/s^2)(336 s) = 1.34 m/s

Therefore, the speed of the treadmill changes by 1.34 m/s after 5.6 min.

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Answer: 1000 Hz · 0,5 m = 500 m/s

Explanation: speed = frequency · wavelength

Answer: I don't understand

Explanation:

study and pay attention

Answer:

It will be doubled

Explanation:

F = ma

Let's consider m = 1 (the mass of the cart is not changing so it is constant),

F = 2, and a = 4.

2 = 1 x 4

When doubling force we need to maintain equality so acceleration should double too. To understand it better find the ratio of force and acceleration 2/4 = 1/2. The ratio of force to acceleration should always equal half in all scenarios, this way we can see how equality is maintained.

2x2 = 1 x (4x2)  

4 = 1 x 8, and the ratio of force to acceleration is 4/8 = 1/2.

The evidences that the Earth is a sphere not flat.

The Earth we know, is a sphere that rotates on its axis for about 24 hours. It also revolves around the Sun for about 365 days. Like other celestial bodies, researchers say that the Earth is round, a sphere.

There are many evidences that the Earth is a sphere. Some of them are as explained above.

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In 15 seconds, the car has travelled a distance of  270 meters.

The three equations of motion are -

Given is a car at rest which begins accelerating at 2.4 m/s² for 15 s.

From the given data, we can write -

[u] = 0 m/s

[a] = 2.4 m/s²

[t] = 15 s

We will use the second equation of motion to find how far the car has gone.

S = ut + 1/2at²

Substituting the values, we get -

S = 0 x 15 + 0.5 x 2.4 x 15 x 15

S = 0.5 x 2.4 x 15 x 15

S = 270 meters

The car has travelled 270 meters.

Therefore, in 15 seconds, the car has travelled a distance of  270 meters.

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Answer:

4/3 kg

Explanation:

KE = (1/2)mv^2

6=0.5*m*(3)^2

m=4/3

Answer:

Explanation:

I'll do this in both meters and feet, since you don't specify which you need. Since we are only dealing in the y-dimension:

Δx = ???

a = -9.8 m/s/s

v₀ = 0

t = 16 sec

In the equation:

Δx = v₀t + \(\frac{1}{2}at^2\) we fill in accordingly:

Δx = \(0(16)+\frac{1}{2}(-9.8)(16)^2\) which simplifies to

Δx = \(\frac{1}{2}(-9.8)(256)\) so

Δx = -1300 m. Now in feet, it's the same equation but the acceleration is -32 ft/s/s:

Δx = \(\frac{1}{2}(-32)(256)\) which is

Δx = -4100 ft (the negative signs here just indicate direction: the penny is this distance below the point from which it was dropped. So, obviously, to answer the question regarding the height of the building, you would say it was 1300 m high or 4100 feet high. The negative would be significant if we were asked instead "How far did the penny fall?" which would be the same answer to a slightly different question.)

When a drawn bow of potential energy 40 joules is fired, ideally the arrow will have a kinetic energy of 40 joules.

Energy that is stored in an object and is yet to be used by the object is known as potential energy. When the object moves, it gains kinetic energy. Kinetic energy is the energy acquired from the motion of an object.

There is also what is known as mechanical energy, which is the sum of the potential energy and the kinetic energy. Ideally, especially in a closed system, the potential energy of an object is equal to the kinetic energy of the object.

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Answer:

a=4,32m/s^2

Explanation:

Fnet = F1 - F2

= 12-1.2

= 10.8N

m=2.5kg

Fnet =ma

10.8=2.5a then divide both sides by 2.5 to get acceleration

Answer:

A microwave

Explanation:

Car

Lightbulb is a really good one

Same with the sun. That one has Chemical as well

Answer:

A stove

Explanation:it transfers heat

Answer:

79.38 J

Explanation:

W = mgz = 4.5*9.8*1.8 (with g = 9.8 m/s^2)

= 79.38 K

The magnitude of the final velocity, V, is independent of the angle of θ, and it is equal to the initial velocity, v0

If V is the magnitude of the velocity of the rock just before it strikes the ground, then:

Final kinetic energy = initial kinetic energy + potential energy lost

(1/2)mV^2 = (1/2)m(v_0)^2 + mgh

V^2 = (v_0)^2 + 2gh

V = sqrt[(v_0)^2 + 2gh]

This is because the only force acting on the rock is gravity and it acts vertically, so the horizontal component of the velocity doesn't change, and the vertical component is transformed into kinetic energy, which is then conserved.

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Answer:-50 J

Explanation:

Answer: -50 N

Explanation:

Answer:

I hope this helps ^^

Explanation:

If more factories start using large tanks of bacteria to remove carbon dioxide from the atmosphere, it would likely lead to a decrease in the overall amount of carbon dioxide in the atmosphere. Carbon dioxide is a greenhouse gas that contributes to the greenhouse effect, trapping heat in the Earth's atmosphere and causing global warming.

With a decrease in the amount of carbon dioxide, the total amount of energy in the Earth system would be affected. Carbon dioxide acts as a blanket, trapping heat from the sun and preventing it from escaping back into space. When the concentration of carbon dioxide decreases, less heat is trapped, resulting in a reduction of the total energy within the Earth system.

As for the global average temperature, the decrease in carbon dioxide levels would have a cooling effect on the planet. Since carbon dioxide is a major contributor to the greenhouse effect, its reduction would reduce the overall warming impact. This could lead to a decrease in the global average temperature, potentially slowing down or mitigating the rate of global warming.

However, it's important to note that the relationship between carbon dioxide levels, energy balance, and global temperature is complex and influenced by various factors. The impact of reducing carbon dioxide through bacteria tanks would depend on the scale of implementation, the effectiveness of the technology, and other factors that affect the Earth's climate system.

Answer:

Explanation:

always accerelation it measures in m/second sguared.

Answer:

Velocity (v) is a vector quantity that measures displacement (or change in position, Δs) over the change in time (Δt), represented by the equation v = Δs/Δt. Speed (or rate, r) is a scalar quantity that measures the distance traveled (d) over the change in time (Δt), represented by the equation r = d/Δt.

Explanation:

hope this helps a little bit sorry if i got it wrong