“Will the real atomic model please stand up?,” why did J.J. Thomson experiment with cathode ray tubes?

A hot air balloon is ascending at speed of 7.5 m/s when a passenger drops a camera. If the camera is 25 m above the ground when it is dropped, it will take the object 3.15 seconds to reach the ground.

The speed of an object is the magnitude of the change of its position over time or the magnitude of the change of its position per unit of time; it is thus a scalar quantity.

The time it takes for an object to reach a certain level given the distance and the initial velocity can be calculated through the equation,

   d = V₀t + 0.5*gt²

Where d is the distance, V₀ is the initial velocity, g is the acceleration due to gravity and t is time. Substituting the known values from the given above,

  25 = (-7.5)(t) + 0.5(9.8 m/s²)(t²)

The value of t from the equation 3.15 s

A hot air balloon is ascending at speed of 7.5 m/s when a passenger drops a camera. If the camera is 25 m above the ground when it is dropped, it will take the object 3.15 seconds to reach the ground.

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Oceanic, Crust, Geolific, techtonic are the four layers of oceanic crust from top to bottom.

Oceanic crust is nothing but the part of the Earth's crust which makes up the seafloor which is  thinner, denser, and simpler in structure than the continental crust; it is  younger, on average; from its birth at a mid-ocean ridge to its end at a subduction zone.

The oceanic crust fragments are sometimes become stranded high and dry on top of a continent; both Continental Crust together  constitute the Earth Crust, yet they are completely distinct in composition, thickness and geological history.

The Oceanic Crust exists at the bottom of all Oceans, filling the spaces between the portions of Continental Crust, its density and thickness, plunges below the edge of the continental plate into the subduction zones.

This causes formation of  a new ocean plate to accommodate displacement of continents and replace the plate that is destroyed by subduction.

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Reducing CO2 emission to maximum extent and saving energy

The present energy policy of UK is set out in the Energy White Paper of May 2007 and Low Carbon Transition Plan of July 2009. It was led by the Department of Energy and Climate Change, and after that headed by Amber Rudd. The current focus of policy are on the reformation of electricity market, rolling out smart meters and improving the energy efficiency of the UK building stock through the Green Deal in which CO2 emission is on top priority.

Answer:

C. Protons have an electrical charge, but neutrons have no charge.

Explanation:

Protons and neutrons both are parts of nucleus and they stay inside the nucleus due to large nuclear force between them

Mass of proton and mass of neutron is almost same or in more precisely we can say that neutrons are slightly heavy than protons

mass of neutrons is 1.008 amu while mass of protons are 1.007 amu.

the main different between them is that protons are positively charged and their charge is same as that of charge of electron

[tex]q_{proton} = 1.6 \times 10^{-19} C[/tex]

while neutrons are electrically neutral and they do not have any charge on them.

so correct answer will be

C. Protons have an electrical charge, but neutrons have no charge.

Answer:

c

Explanation:

Answer: Strong Nuclear Force is responsible for making fusion possible in the sun .

Explanation:

Fusion reaction is basically the result of the interplay of two opposing forces

1. Attractive Strong Nuclear Force

2. Repulsive coulomb force

Strong nuclear force is a short range force while its magnitude is much greater than the coulomb force . When two nuclei approach each other coulomb force of repulsion between the nuclei (proton-proton repulsion) acts between the nuclei but due high speed as the nuclei come closer strong nuclear force of attraction come into play which has magnitude much more larger than the coulomb force .

             The strong force grows rapidly once the nuclei are close enough, and the fusing nucleons can essentially "fall" into each other and the result is fusion and net energy produced. Thus it is the presence of Strong Nuclear Force which makes the fusion possible .

Extrinsic motivation is not a characteristic of a creative person. Hence, option (B) is correct.

The psychological phenomena in which people engage in particular behaviors as a result of rewards from outside sources is known as "extrinsic motivation."

The practice of operant conditioning, a method of behavior modification that makes use of extrinsic motivators—or stimuli like rewards and punishments to motivate particular actions and their repetition, is based on this idea. Both intangibles and extrinsic motivators are possible.

Examples of extrinsic motivation are :

Therefore, the extrinsic motivation is not a characteristic of a creative person. So, option (B) is correct.

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Answer:

B. The time for both of the balls to reach the ground was the same.

Explanation:

Galileo showed that objects fall at the same time regardless of their weight, it is a matter of their resistance to air that arrives or not before. In a system where there is no air and therefore no friction, the objects fall at the same time and that has been demonstrated many times.

The hint in this problem is in the word "about" or approximately how many pounds.

So we could find the solution by estimation through rounding off.

We know that almonds cost about 3.50 per pound and a bag costs about $7.00.

Dividing 7 by 3.50 per pound, will give us $7 ÷ $3.50 = 2 pounds.

The answer is 2 pounds.

Answer:2 pounds of almonds are in the bag.

Explanation:

According to question ,pounds of almonds in $3.49 = 1 pound

Then pound of almond for $1 = [tex]\frac{1}{3.49} pounds[/tex]

Pounds of almond which cost $6.95:

[tex]\frac{1}{3.49}\times 6.95 pounds=1.9914 pounds\approx 2 pounds[/tex]

2 pounds of almonds are in the bag.

Answer: Option (C) is the correct answer.

Explanation:

Nucleus of an atom consists of protons and neutrons. Whereas electrons revolve around the nucleus of the atom.

Protons are positively charged, neutrons have no charge and electrons are negatively charged. So, like charge of protons tend to oppose each other and as a result, electrostatic force of repulsion occurs.

This electrostatic force of repulsion is overcome by strong nuclear force which helps in binding of protons and neutrons into the nucleus.

Thus, we can conclude that the force that is most responsible for the stability of the atomic nucleus is strong nuclear force.

Answer:

readily accept electron flow."

Explanation:

As we know that electric current is defined as rate of flow of electric charge which is basically due to flow of electrons

So here we can say that

[tex]i = \frac{dq}{dt}[/tex]

now we know that conductors are defined as good conductors when they do not resist the flow of charge

which means a good conductor will easily conduct the electric current through it.

So here correct answer will be

readily accept electron flow."

The acceleration of gravity on the surface of a planet can be calculated using the mass and the radius of the planet. In this case, the question asks for the acceleration of gravity on Jupiter's surface, given the mass and radius of a moon on Jupiter relative to the earth. A formula is provided to calculate the acceleration of gravity on Jupiter's surface using the known mass and radius of the earth.

The acceleration of gravity on the surface of a planet is directly proportional to its mass and inversely proportional to the square of its radius. In this case, the moon on Jupiter has 1/8 the mass of the earth and 1/2 the radius. Therefore, the acceleration of gravity on Jupiter's surface can be calculated as follows:

Acceleration of gravity on Jupiter's surface = (Mass of Jupiter) / (Radius of Jupiter)^2

Since the mass of the moon is 1/8 the mass of the earth and the radius is 1/2 the radius of the earth, we can substitute these values into the equation:

Acceleration of gravity on Jupiter's surface = (1/8 * Mass of Earth) / (1/2 * Radius of Earth)^2

Simplifying the equation gives:

Acceleration of gravity on Jupiter's surface = (1/8 * Mass of Earth) / (1/4 * Radius of Earth)^2

Assuming the mass and radius of the earth are known, you can substitute the values and calculate the acceleration of gravity on Jupiter's surface.

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