Question 4
3
4. A 12-ohm resistor is connected to a voltage battery. If the voltage provided by the battery is
doubled, the current through the resistor is
A. doubled
B. halved
C. quadrupled
D. unchanged
Justification:

Answer:

The lack of sufficient water resources, including a lack of access t safe water supplies, to meet water needs within a region.

Explanation:

Radio waves traveling through the ionosphere at high latitudes experience quick and unpredictable oscillations, which is known as high-latitude scintillation.

The auroral border, or area of the ionosphere where the aurora borealis (northern lights) appear, is typically connected with scintillation. However, high-latitude scintillation can occasionally be seen equatorward of the auroral boundary depending on the circumstances. The cause of this phenomenon is the presence of ionospheric irregularities that go beyond the auroral oval, such as irregularities in plasma density brought on by equatorial spread F (ESF). ESF can produce significant ionosphere-wide anomalies that lead to scintillation at lower latitudes. This may occur when the sun is active more intensely or when particular ionospheric circumstances favor the production of these anomalies.

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Both Paula and Ricardo will have equal momentum after the push-off.

According to Newton's third law of motion, for every action, there is an equal and opposite reaction. When Paula and Ricardo push off from each other, they exert equal and opposite forces on each other. Since momentum is the product of mass and velocity (momentum = mass × velocity), the momentum of both skaters will be equal and opposite in direction. This is due to the law of conservation of momentum, which states that the total momentum of a closed system remains constant.

Despite Ricardo weighing more than Paula, both ice skaters will have equal momentum after the push-off, but in opposite directions. This is due to Newton's third law of motion and the conservation of momentum principle.

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Answer:

The new pressure will be 12 atm

A mechanical wave is a wave that requires a medium to travel through, such as sound waves or water waves. In everyday life, we experience mechanical waves when we hear sounds or see water waves in a pond.

Transverse Wave: A transverse wave is a wave that vibrates perpendicular to the direction of wave propagation, such as light waves or radio waves.

We use transverse waves every day when we use our phones to receive radio waves.

Longitudinal Wave: A longitudinal wave is a wave that vibrates parallel to the direction of wave propagation, such as sound waves or seismic waves.

We hear sound through longitudinal waves, and we feel earthquakes through seismic waves.

Wave Speed: Wave speed is the speed with which a wave propagates via a particular medium.

When we watch a wave on the beach, we can estimate the wave speed by observing how fast it moves across the sand.

Wavelength: Wavelength is the distance between two corresponding points on a wave, such as the distance between two crests.

We can measure the wavelength of light using a spectroscope.

Frequency: Frequency is the number of waves that pass a given point in a given amount of time, such as the number of waves passing a fixed point in one second.

We use frequency to measure the pitch of sound or the radio frequency of a station.

Amplitude: Amplitude is the maximum displacement of a wave from its resting position, such as the height of a wave from its crest to its trough.

The amplitude of a sound wave determines how loud the sound is.

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The youngest is Calliope.

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Answer:

The amount of electric current traveling per unit cross-section area

Explanation:

It is denoted in Amperes per square meter. The more the current is in a conductor, the higher the current density. The electric current generates a magnetic field

Answer:

Scientific Definition of Mass. Mass is the quantity of inertia (resistance to acceleration) possessed by an object or the proportion between force and acceleration referred to in Newton's Second Law of Motion (force equals mass times acceleration). In other words, the more mass an object has, the more force it takes to get it moving.

Explanation:

Answer:

Hello, I'm here to help you.

↬ 78%

Explanation:

↬ Think that about 70% of the area of the earth is covered by the ocean.

↬ So the precipitation that falls on it is a smiliar percentage.

The speed of the water at the lower level is 2.5 m/s. As we can see, the decrease in speed is due to the increase in cross-sectional area of the pipe, which allows the water to flow more slowly.

To solve this problem, we can use the principle of conservation of mass, which states that the mass of a fluid flowing through a pipe must remain constant. This means that the product of the cross-sectional area and the speed of the water must be constant throughout the pipe.
Let's denote the speed of the water at the lower level as v2. We can use the formula for the conservation of mass to find v2:
A1v1 = A2v2
Where A1 and v1 are the cross-sectional area and speed of the water at the higher level, and A2 is the cross-sectional area at the lower level.
Substituting the given values, we get:
(4.0 cm^2)(5.0 m/s) = (8.0 cm^2)(v2)
Simplifying, we get:
v2 = (4.0 cm^2)(5.0 m/s) / (8.0 cm^2) = 2.5 m/s
Therefore, the speed of the water at the lower level is 2.5 m/s. As we can see, the decrease in speed is due to the increase in cross-sectional area of the pipe, which allows the water to flow more slowly.

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Answer:

Inclined Plane - A ramp, for example a wheelchair ramp to help move to another level.

Wheel & Axle - On lawnmowers and wheelbarrow.

Lever - A seesaw

Pulley - adjustable clothesline (think from back then when you would put clothes out to dry them)

Screw - the bottle caps you screw on or off

The machine is far less efficient because work output is much less than work input.

The major importance of engines is to help ensure that the work output is far greater than the work input. Thus a small  amount of energy ought to be used to achieve an enormous amount of work.

In this case, a smaller output is recorded for every energy energy input meaning that the machine is not efficient.

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Thermal system is used on some electric and hybrid vehicles to cool the power electronics and charger modules.

What is thermal system?

An isolated system has no interaction with the rest of the physical universe, a closed system can only exchange heat and work, and an open system can also exchange mass. In thermodynamics, a system is the portion of the physical universe that the observer chooses to analyse separately from the rest.

A thermal system, on the other hand, is a complex assembly of coupled components, some of which are thermal, that exhibits a common structured behavior  for instance, a refrigerator consists of pipes, a compressor, an electric motor, heat exchangers, valves, insulation, a casing, doors, a lamp, and other components that interact to achieve the internal goal of producing cold.

The interior space or the refrigerant are thermodynamic systems, whereas a refrigerator is a thermal system. While large thermal systems, like a refrigerated store, are constructed on the job site, small thermal systems, like a refrigerator, typically come fully installed from the manufacturer (although a straightforward split-air-conditioning system needs installation). Thermal systems often require services such as fuel supply, flue stack, water intake and exit, air intake and exit, and electrical supply (for power or at least for control).

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Explanation:

Which of the following statements describe an object in equilibrium?

III. The net external force on the object is zero

I hope this helps

Answer:

The answer is B.

Explanation:

It is clear that the substance will be in liquid state above its melting point and below its boiling point.

A) This is incorrect. The substance is above the melting point but it is also above the boiling point (0 is greater than -183)

B) This is your correct answer. The substance is above the melting point and also below the boiling point.

C) This is incorrect. The substance is below both the melting point and the boiling point.

D) This is incorrect. The substance is drastically below the melting and boiling point.

Therefore , the only correct answer for this question would be B.

The bulk modulus is a measure of the resistance of a material to compression and is an important parameter for understanding the behavior of seismic waves in the Earth's crust during earthquakes.

The speed of longitudinal waves (P-waves) in a solid is given by:

v = √(K/ρ)

where v is the velocity of the wave, K is the bulk modulus, and ρ is the density of the medium.

Rearranging the above equation, we get:

K = ρ * v^2

Substituting the given values, we get:

K = 2,900 kg/m^3 * (5,000 m/s)^2

K ≈ 7.25 x 10^10 N/m^2

Therefore, the average bulk modulus of Earth's crust is approximately 7.25 x 10^10 N/m^2. This value is consistent with the bulk moduli of various types of rocks that make up the Earth's crust, which typically range from 5 x 10^9 N/m^2 to 100 x 10^9 N/m^2.

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Answer:

C. it makes vegetation grow out of control

Explanation:

please mark this answer as brainliest

Explanation:

The stage in which the sales of a service start to lessen is called the Decline stage.

Answer: 34

Explanation:

34

Answer: i think its a bullfrog forgive me if im wrong i dont exactly know

Explanation:

Answer:

that is an African bullfrog

The property of sound that refers to how long a musical sound lasts is called "duration."

Duration describes the length of time a sound is audible, Duration describes the length or time span of a sound, specifically the time it takes for the sound to decay or fade away after it is produced. In music, duration is an important element that contributes to rhythm and the overall structure of a composition.

Duration is a fundamental aspect of sound and refers to the length of time that a sound or musical note is audible. It is often described in terms of its temporal length, such as seconds, milliseconds, or any other relevant unit of time. Duration plays a crucial role in shaping the rhythm, pacing, and overall structure of music.

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Hi, you did not enter the text about the Suarez family, which makes it impossible for this question to be answered accurately. However, from the context of your question, it is possible to see that you want to know two positive and negative points that the Suarez family would observe when starting a planting of organic agriculture.

Among the negative points, we can say that organic agriculture has a high cost, as the techniques used in it require a greater number of resources, which can make not only the service more expensive, but also the product. A second negative point is that the techniques used in organic agriculture are more difficult than the techniques used in conventional agriculture, since all management of organic crops must be carried out without the application of chemical products.

Among the positive points, we can say that the growing number of consumers of organic products can increase the profit that the family will have from the sale of these products. In addition, the family will have healthier, less polluted and more productive land.

Answer:

Sample response: Organic farming would have higher costs, and would be more complex than conventional farming. However, the Suarez family could charge a higher price for organic produce. This type of farming also would be better for the land.

Explanation:

Answer:

141 J  

Explanation:

The lowest sig digits in a calculation determine the sig dig of the answer

The temps are listed with 3 significant digits and the spec heat is 3 sig digits  (the mass has 4 sig digs) .....so answer will need 3 digits

31.91 g   * .903 J/g-C  *  (26.1 - 21.2 C) = 141 J   (three sig dig)

The velocity of the sinusoidal wave decreases when it travels from string 1 to string 2 because the linear density of string 2 is different, causing the wave to slow down. Thus, Option C holds the truth.

When a sinusoidal wave travels from one string to another with a different linear density, its velocity changes due to the change in tension and mass per unit length of the string. The velocity of the wave is proportional to the square root of the tension divided by the mass per unit length.

If the linear density of string 2 is higher than that of string 1, the wave will slow down as it travels across the boundary because the increased mass per unit length will result in a decrease in velocity. Conversely, if the linear density of string 2 is lower, the velocity of the wave will increase as it travels across the boundary.

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The potential energy of the arrow when it is 30.0 m above the ground is 45.57 J.

The potential energy (PE) of an object at a height h is given by the formula:

PE = mgh

Where m is the mass of the object, g is the acceleration due to gravity ( 9.8m/s²), and h is the height.

Given that:

m = 0.155 kg

v = 31.4 m/s

h = 30.0 m

g = 9.81 m/s² (acceleration due to gravity)

Use the formula for potential energy to find the potential energy of the arrow at a height of 30.0 m:

PE = mgh

PE = 0.155 × 9.8 × 30.0

PE = 45.57 J

Therefore, the potential energy of the arrow is 45.57 J.

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Of the following options, a thunderstorm would be considered a Meso-Scale atmospheric circulation.

A mesoscale circulation is a collection of small-scale atmospheric phenomena that take place over a horizontal distance of 2-200 km and have a lifetime of several hours. These circulations are created by airflows that are disrupted by terrain, such as mountains, or by other factors like fronts or thunderstorms, and result in wind changes or weather systems. Meso-scale circulations are frequently classified into three categories: mountain/valley winds, sea/land breeze systems, and convective storms.

A thunderstorm is one of the most prevalent types of mesoscale convective systems (MCS). They can last anywhere from a few minutes to several hours and can span up to 50 miles in diameter. They generate heat, moisture, and momentum, all of which help to sustain the storm and alter atmospheric conditions.

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Answer:

.5 J

Explanation:

KInetic Energy of the rocket  = 1/2 mv^2   = 1/2 .023 * 6.6 = .5 J

the work of friction has to equal this   .5 J

The weight of a girl would be 294 N on Earth with a mass of 30 Kg.

Arithmetic operations can also be specified by the addition, subtract, divide, and multiply built-in functions.

+ Addition operation: Adds values on either side of the operator.

For example 4 + 2 = 6

- Subtraction operation: Subtracts the right-hand operand from the left-hand operand.

for example 4 -2 = 2

* Multiplication operation: Multiplies values on either side of the operator

For example 4*2 = 8

The weight on Earth of a girl would be the product of the mass and acceleration due to gravity on Earth

So the required solution would be:

⇒ weight  = mass × acceleration due to gravity on Earth

⇒ weight  = 30 × 9.8

⇒ weight  = 294 N.

Hence, the weight of a girl would be 294 N on Earth with a mass of 30 Kg.

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The vector force exerted by the seat on the rider is 749.12j N or (0 , 749.12 , 0).

The full question is in the attachment. At the bottom of the ride forces that work on the seat.

In y-axis

N - w = Fc

N - mg = mω²R

N - mg = mω²R
N - (56 × 9.8) = 56 × 0.598² × 10

N - 548.8 = 560 × 0.358

N = 200.322 + 548.8

N = 749.122 Newton

In vector

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