A van slows down as it travels up a steep hill. Its speed goes from 20m/s at the bottom of the hill to 12m/s when it reaches the top 8 seconds later. How far has the van travelled between the bottom and the top of the hill?

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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The electron configuration with the greatest stability is the one that follows the Aufbau principle and has completely filled energy levels or sublevels.

The electron configuration that has the greatest stability is one that follows the principle of filling up the energy levels and sublevels in a specific order. This principle, known as the Aufbau principle, states that electrons will fill the lowest energy levels and sublevels first before moving to higher energy levels and sublevels. Additionally, the electron configuration that has a completely filled sublevel or energy level is more stable due to the electron-electron repulsion being minimized.

For example, the electron configuration of the element neon (Ne) is 1s2 2s2 2p6. This configuration has a completely filled 2p sublevel and is considered more stable than a configuration with only partially filled sublevels.

Therefore, the electron configuration with the greatest stability is the one that follows the Aufbau principle and has completely filled energy levels or sublevels.

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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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Answer: The given statement is true.

Explanation:

A change that is observable is known as a stimuli. Every individual has their own way of thinking and interpreting things.

For example, Lisa got a chocolate as a reward for completing her homework whereas his elder brother gets upset with his mom because of this.

So, in this situation Lisa will be happy as she has got a reward whereas his brother is taking this thing in a negative way by getting jealous or upset about it.

Hence, we can conclude that the statement one's perception depends on the way the brain interprets the stimuli, is true.

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:

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:

In electric circuits, amperage (current) is the flow of charge, voltage is the potential that causes this flow, and power is the rate of energy consumption or conversion. Power is calculated with the formula P = VI, indicating the direct proportionality between voltage and current, and the inverse relationship with resistance.

The relationship between amperage, voltage, and power in electric circuits is fundamental to understanding electric power.

Amperage, or current (measured in amperes), is the flow of electric charge. Voltage (measured in volts) is the potential difference that causes current to flow through a circuit. The power (measured in watts) is the rate at which electrical energy is consumed or converted into another form of energy. According to Ohm's Law, the formula to calculate power is P = VI, where P represents power, V voltage, and I current.

There is a directly proportional relationship between voltage and current in ohmic devices, meaning that if the voltage increases, the current also increases proportionally, provided the resistance remains constant. Conversely, for a fixed voltage, the current will differ depending on the resistance of the material - the lower the resistance, the higher the current. Hence, if we have two lightbulbs with different wattages operating at the same voltage, the one with a higher power rating must have a lower resistance and consequently draw more current. Increasing voltage will also increase power, which explains why a lightbulb designed for a particular voltage will burn out if connected to a higher voltage.

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: 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 .

The resistance of an electric oven's heating element that produces 5.0 kW of heat when connected to a 220 V source must be 9.68 ohms.

To determine the resistance of the heating element that produces 5.0 kW of heat when connected to a 220 V source, we use the formula for electrical power (P): P = V^2 / R, where P is power, V is voltage, and R is resistance. Rearranging the formula for resistance gives us R = V^2 / P.

Substituting the given values, we get R = (220 V)^2 / (5.0 kW), which can be further simplified as R = 48400 V^2 / 5000 W = 9.68

Therefore, the resistance of the heating element must be 9.68 ohms.

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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