3. Which resistor experiences a larger voltage drop across it?
A. The 10 ohm resistor
B. The 5 ohm resistor
C. Neither, both have the same voltage across
D. Unable to be determined
Justification:

Explanation:

The graphs show maximum gravitational potential energy for the pendulum and they correspond to positions #1 and #5.

Answer:

dichotomous key

Explanation:

because it is

Answer:

Q = C M ΔT    where C is specific heat in cal / gm*deg C

C (Fe) = .11

C (Al) = .22

obviously ΔT has to be twice as great for Iron (Fe) as for (Al) for the same amount of heat to be transferred

ΔT = Q /(C * M)      where ΔT is the change in temperature

a) iron would have the higher final temperature

Answer:

Conscience

Explanation:

Conscience refers to a person's moral sense to differentiate between right and wrong to judge one's behaviour.

Jerrold just broke up with his girlfriend and is describing his current feelings about the breakup to his friend.

So, he pull the information from the conscience of Jerrold's mind.

Answer:

Anything that has mass is made up of matter – an all-encompassing word for atoms and molecules that make up our physical world. We describe this matter as existing in states (sometimes referred to as phases). Most people are familiar with three states of matter – solids, liquids and gases – but there are two more that are less commonly known but just as important – plasmas and Bose-Einstein condensates

Answer:

C would be the correct answer

Answer:

It has to have a whistle device on the spout. When boiling occurs, water vapour displaces air above the water which has to escape through the whistle hence activating the required vibrations. Thereafter, the continuing supply of steam does the same job until the cook involves turns off the heat. The whistle is not made to exacting scientific standards and there is no doubt a range of pressures above which it will work it. It would be interesting to know how you observed the water boiling without using a transparent kettle.

Explanation:

hope it helps

The problem feature of the Milky Way's rotation that led to the proposal of dark matter is the observation that stars and gas in the outer regions of galaxies, including the Milky Way, are moving at unexpectedly high velocities, defying expectations based on visible matter alone.

The problem arises from the understanding of gravity and the laws of motion. Based on the visible matter observed in galaxies, such as stars and gas, the expected velocities of objects in the outer regions should decrease as their distance from the galactic center increases.

However, observations have shown that the velocities remain relatively constant or even increase, indicating the presence of additional mass not accounted for by visible matter.

To explain this discrepancy, scientists hypothesized the existence of dark matter, which is an invisible and as-yet-undetected form of matter that does not interact with light but exerts gravitational effects.

The presence of dark matter can explain the observed high velocities in the outer regions of galaxies, including the Milky Way, and reconcile them with our understanding of gravity and motion.

Therefore, the unexpected high velocities of stars and gas in the outer regions of galaxies, including the Milky Way, challenged expectations based solely on visible matter, leading to the proposition of dark matter.

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Answer:

Because of the heat that contains of the fire anf it make it boil because of the atmosphere that has form

Answer:

C. Thermal energy from the fire moves to the water in the form of heat.

Explanation:

The potential difference that stopped the electron is ΔV (to be calculated).

The initial kinetic energy of the electron is KE (to be calculated) in joules, which will be converted to electron volts (eV).

To determine the potential difference that stopped the electron, we can use the equation:

ΔV = -ΔE/q

where ΔV is the potential difference, ΔE is the change in electric potential energy, and q is the charge of the electron.

Since the electron is brought to rest, its initial kinetic energy is fully converted into electric potential energy.

The initial kinetic energy (KE) of the electron can be calculated using the equation:

KE = (1/2)mv²

where m is the mass of the electron and v is its initial speed.

The charge of the electron (q) is -1.6 x 10^(-19) C.

First, let's calculate the initial kinetic energy (KE) of the electron:

KE = (1/2)mv² = (1/2)(9.11 x 10^(-31) kg)(460,000 m/s)²

Next, let's calculate the potential difference (ΔV):

ΔV = -ΔE/q = -KE/q

Substituting the values into the equation, we have:

ΔV = -(KE/q) = -(KE/(-1.6 x 10^(-19) C))

Finally, we can convert the initial kinetic energy from joules to electron volts (eV) using the conversion factor 1 eV = 1.6 x 10^(-19) J.

The potential difference that stopped the electron is ΔV (to be calculated).

The initial kinetic energy of the electron is KE (to be calculated) in joules, which will be converted to electron volts (eV).

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The work done by the crane on the load is positive. As the load was initially at rest, the crane had to apply a force greater than the weight of the load to lift it up against gravity. This means that the crane did work on the load by transferring energy to it in the form of gravitational potential energy.

The work done is equal to the product of the force applied by the crane and the distance over which the force was applied.

Once the load reaches the top of the tower, the work done on the load is zero. This is because the load is no longer moving and is not experiencing any change in potential energy or kinetic energy. The crane is also not applying any force on the load at this point.

As the crane gently sets the load down, the work done on the load is negative. The crane is applying a force that is less than the weight of the load, and the load is moving in the opposite direction to its initial motion. This means that the crane is transferring energy out of the load, resulting in a decrease in the load's potential energy. The work done is equal to the product of the force applied by the crane and the distance over which the force was applied, which is in the opposite direction to the direction of motion.

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the distance of Venus from the Sun in kilometers is: 107,708,467 km

One astronomical unit (au) is approximately equal to 149.6 million kilometers. Therefore, Venus orbits the sun at a distance of approximately 224.4 million kilometers (1.5 x 149.6 million km) from the sun.
Hi! Venus orbits the Sun at a distance of approximately 0.72 AU (not 1.5 AU). To convert this distance to kilometers, you can use the following formula:

1 AU (Astronomical Unit) = 149,597,870.7 km

So, the distance of Venus from the Sun in kilometers is:

0.72 AU × 149,597,870.7 km/AU ≈ 107,708,467 km

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Answer:

Both energies are equal when the rock has fallen 20 m or equivalently when it is at a height of 20 m.

Explanation:

Potential and Kinetic Energy

The gravitational potential energy is the energy an object has due to its height above the ground. The formula is

\(U=mgh\)

Where:

m = mass of the object

g = acceleration of gravity (9.8~m/s^2)

h = height

Note we can also use the object's weight W=mg into the formula:

\(U=Wh\)

The kinetic energy is the energy an object has due to its speed:

\(\displaystyle K=\frac{1}{2}mv^2\)

Where v is the object's speed.

Initially, the object has no kinetic energy because it's assumed at rest.

The W=30 N rock falls from a height of h=40 m, thus:

\(U=30*40=1,200 J\)

Since the sum of the kinetic and potential energies is constant:

U' + K' = 1,200 J

Here, U' and K' are the energies at any point of the motion. Since both must be the same:

U' = K' = 600 J

U'=Wh'=600

Solving for h':

\(\displaystyle h'=\frac{600}{W}=\frac{600}{30}=20~m\)

Both energies are equal when the rock has fallen 20 m or equivalently when it is at a height of 20 m.

For moving an object from one side of a room to the other side of the room a force is needed to be applied to the object and the position of the object must be known. Thus, A and D are the correct options.

Motion is a phenomenon in which an object changes its position with respect to time. It is the distance or displacement covered by an object in a particular time period.

Newton's first Law states that a body at rest will stay at rest and a body in motion will remain in motion unless and until an external force is applied on it. Force is responsible for the displacement of an object from one place to another.

Direction is equally important in motion as force applied in the direction opposite to the motion can stop the motion while the force in the direction of motion can accelerate the motion.

Therefore, correct options are A and D. The force and position are important factors for the motion of an object.  

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The Ka of an acid is determined by the Henderson-Hasselbalch equation, which is 3.162 x 10⁵.

Acid is a compound that releases hydrogen ions (H+) when dissolved in water. Acids have a sour taste, a corrosive reaction when in contact with some metals, and have a pH of less than 7. Some common acids include hydrochloric acid, sulfuric acid, acetic acid, citric acid, and nitric acid. Acids are used in many industrial processes, such as metal plating, leather tanning, and dyeing. Acids are also essential to the biological functions of living organisms like digestion, respiration, and metabolism. In addition, acids are used to produce medicines, cosmetics, and other products.

The Ka of an acid is determined by the Henderson-Hasselbalch equation, which is given as:
pH = pKa + log([base]/[acid])
In this case, we can rearrange the equation to solve for Ka:
Ka = 10\(^{(pH - pKa)\)
Since the pH is 6.50 and the amount of base added is 15.0 ml, we can calculate the Ka as follows:
Ka = 10\(^{(6.50 - pKa)\)
Ka = 10\(^{(6.50 - pKa)\)
Ka = 10\(^{(6.50 - 15.0/15.0)\)
Ka = 10\(^{(6.50 - 0.5)\)
Ka = 10⁵.⁵
Ka = 3.162 x 10⁵

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Answer:

2.66 m/s² .

Explanation:

Initial velocity , u = 0 m/s

Final Velocity , v = 8 m/s

Time Taken , t = 3 s

So , Acceleration = (v-u)/t = (8 m/s - 0 m/s) /3 sec . = 8/3 m/s² = 2.66 m/s²

Answer:

x =

\( - 15 \times \frac{ \sqrt{3} }{2} \frac{m}{s} \)

y = 7.5m/s

Answer:

E: None of the above

Explanation:

Since the force on the wire F = ∫idL × B where i = current in wire = 2.0 mA = 2.0 × 10⁻³ A, dL = vector length of wire = dyj and we integrate from y₁ = 0 m and y₂ = 0.25 m, and B = magnetic field = (0.3y)i + (0.4y)j

So, F = ∫idL × B

and we integrate from y₁ = 0 m and y₂ = 0.25 m

F = 2.0 × 10⁻³ A∫₀⁰°²⁵[dyj m × (0.3y)i + (0.4y)j]

F = 2.0 × 10⁻³ A∫₀⁰°²⁵[dyj m × (0.3y)i + dyj m × (0.4y)j]

F = 2.0 × 10⁻³ A∫₀⁰°²⁵[(0.3y) × dy(j × i) + 0.25 × (0.4y)(j × j)]

F = 2.0 × 10⁻³ A∫₀⁰°²°⁵[(0.3ydy(-k) + 0.1y)(0)]

F = 2.0 × 10⁻³ A∫₀⁰°²⁵(-0.3ydy)k

F = 2.0 × 10⁻³ A[-0.3y²/2]₀⁰°²⁵k

F = -2.0 × 10⁻³ A[0.3(0.25)²/2 - 0.3(0)²/2]k

F = -2.0 × 10⁻³ A[0.3(0.0625)/2 - 0]k

F = -2.0 × 10⁻³ A[0.3(0.0625)/2]k

F = -1 × 10⁻³[0.01875]k N

F = -[0.01875 × 10⁻³]k N

F = -[1.875 × 10⁻⁵]k N

Since the answer is not contained in the options, the answer is E.

 Arrows in the inbound methodology circle represent the direction that your business should spin to keep the flywheel moving and to achieve sustainable growth.

The inbound methodology and the concept of a flywheel are closely related as they both focus on the process of attracting, engaging, and delighting customers to drive business growth. The inbound methodology is a strategy that uses content and digital marketing techniques to attract potential customers, convert them into leads, close sales, and delight them as customers. The flywheel, on the other hand, is a metaphor for the circular process of creating momentum in your business by continually attracting, engaging, and delighting customers. The inbound methodology represents one part of the flywheel, as it helps to attract and convert leads, but the entire process of the flywheel requires ongoing efforts to delight customers and turn them into promoters. Therefore, the arrows in the inbound methodology circle represent the direction that your business should spin to keep the flywheel moving and to achieve sustainable growth.

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No, the sun cannot explain global warming. Global warming is a phenomenon in which the temperature of the Earth's surface and atmosphere is rising continuously due to human activities such as deforestation, burning of fossil fuels, and industrialization.

This increase in temperature cannot be explained only by an increase in solar radiation.There are several factors which contribute to global warming, including greenhouse gases such as carbon dioxide, methane, and water vapor. These gases trap heat in the Earth's atmosphere, which causes the planet's temperature to rise. The sun's radiation does contribute to global warming, but it is not the main cause.

i) To calculate the increase in solar radiation that would cause the Earth to warm up by 1 K, we can use the following formula:ΔS = ΔT / αWhere ΔS is the increase in solar constant, ΔT is the increase in temperature, and α is the Earth's albedo (reflectivity).α = 0.30 is the standard value used for the Earth's albedo.ΔS = ΔT / αΔS = 1 K / 0.30ΔS = 3.33 W/m2So, to explain the increase in temperature of 1 K over the last hundred years, the solar constant would need to increase by 3.33 W/m2.

ii) The observed fluctuation of the solar constant over the past 400 years has been around 0.1% to 0.2%. This is much smaller than the 3.33 W/m2 required to explain the increase in temperature of 1 K over the last hundred years. Therefore, it is unlikely that the sun is the main cause of global warming.

The sun cannot explain global warming. While the sun's radiation does contribute to global warming, it is not the main cause. The main cause of global warming is human activities, particularly the burning of fossil fuels, which release large amounts of greenhouse gases into the atmosphere.

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The ability to see the world in three dimensions is called depth perception. It is the visual ability to perceive the relative distance of objects in space and to see them in three dimensions.

Depth perception is an important aspect of vision that allows us to accurately judge distances, perceive spatial relationships, and interact with our environment.

It is the result of the brain processing information from both eyes to create a single, three-dimensional image.

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Answer: Air resistance is "pushing" the ball upwards.

Explanation:

a. (ii) Savery engine - The boiler could not withstand the steam pressure needed to lift water beyond 6 m.

b. (i) Gun powder engine - The engine had no mechanism to move the piston back to complete a cycle.

c. (iii) Newcomen engine - The continual reheating needed after each cooling of the engine cylinder required a tremendous amount of thermal energy.

d. (iv) Watt engine - This engine was large and massive and less efficient than thought possible.

Explanation:

a. Creating a lower vacuum in Savery engine causes more water to evaporate and limits the pressure differential. Practically, Savery's device was limited to 20-25 feet of suction (20 feet = 6 m).

b. The explosion of gun powder, in the gunpowder engine, forces the piston upwards for the gas to escape from the tube. Gravity and air pressure then pull the piston back. It then lifts another weight when it reaches the bottom, it explodes again and the cycle restarts.

c. The Newcomen engine operates by condensing steam drawn into the cylinder, thereby creating a partial vacuum which requires continual reheating after each cooling and a tremendous amount of thermal energy.

d. Watt's engine was able to convert around 2% of the thermal energy in steam to work. Later, the efficiency of this engine was increased to approximately 17%.

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The term you are looking for is "chemical battery". Chemical batteries work by converting chemical energy into electrical energy through a series of chemical reactions. These reactions take place within the battery's cells, which are composed of two electrodes and an electrolyte.

When the battery is connected to a circuit, the chemical reactions produce an electrical current that can be used to power devices. Chemical batteries are widely used in many applications, including consumer electronics, electric vehicles, and renewable energy systems. They are a crucial component of our modern technological society, and ongoing research is focused on developing more efficient and sustainable battery technologies to meet growing energy demands.

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Explanation:

"The concentration of a solution is a measure of the amount of solute that has been dissolved in a given amount of solvent or solution. A concentrated solution is one that has a relatively large amount of dissolved solute. A dilute solution is one that has a relatively small amount of dissolved solute."

The acceleration of the baseball is 500 m/s².

A force is an influence that has the power to alter an object's motion. An object with mass can change its velocity, or accelerate, as a result of a force. An obvious way to describe force is as a push or a pull.

The mass of the baseball, m = 0.2 kg

The force acting on the baseball is 100 N.

By Newton's second law of motion,

F = ma

Substituting the values in the above equation,

100 N = 0.2 kg × a

a = 100 / 0.2

a = 500 m/s²

The total mass when the baseball and baseball bat are in contact is:

m = 0.2 + 0.94 = 1.14 kg

Then the acceleration will be:

F = ma

100 = 1.14 × a

a = 87.7 m/s²

The acceleration of the ball after the contact is 500 m/s².

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Answer:

it is b

Explanation:

yuh

Answer:

C. Q = +50 J, W = -50 J

Explanation:

I was struggling with this one for a while, but I ended up getting it right!

It's Q = +50 J and W = -50 J, with Q representing the heat absorbed and W representing the work done ON the system. I'm not sure why this is correct, but it is. :)

Answer:

This downward force and acceleration results in a downward displacement from the position that the object would be if there were no gravity. The force of gravity does not affect the horizontal component of motion; a projectile maintains a constant horizontal velocity since there are no horizontal forces acting upon it