5. The planet Mars has a mass about one-tenth the mass of Earth. Even though Mars has two moons, their tidal forces have a much weaker effect on Mars than Earth's moon does on Earth. Why do you think this is ? Use the data in the tables to support your prediction

Answer: False

Explanation:  

Answer:

Increased atmospheric pressure will increase the boiling point of water

Water vapor has liquid phase and a vapor phase

As pressure is increased vapor particles will return to the liquid phase

An oversimplified view is to consider the activity of individual molecules of water - when molecules of water are heated they are more active and more likely to escape from the liquid phase to the vapor phase

a) The magnitude of the net magnetic force that acts on the particle is 2.18 x 10-6 N.
b) The angle that the net force makes with respect to the x axis is 63.8°.

A magnetic field is a vector field that describes the magnetic influence on moving electric charges, electric currents, and magnetic materials. A moving charge in a magnetic field experiences a force perpendicular to its own velocity and to the magnetic field.Magnetic Field is the region around a magnetic material or a moving electric charge within which the force of magnetism acts. A pictorial representation of the magnetic field which describes how a magnetic force is distributed within and around a magnetic material.

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Explanation:

when a force works in a same direction as a body moves,the entite force acts on the body..... subtract the angle between force and the resulant vector you want to calcuate from 90. if for instance a force acts for 30 degree angle from the object direction of motion then,90-30=60

Answer:

force on brake shoes is 10 N

Explanation:

for the master cylinder;

force applied = 140 N

diameter = 14d

for brake cylinder;

force applied on the brake shoe by the brake cylinder f = ?

diameter = d

The pressure will be transmitted undiminished from the master cylinder to the brake cylinder according to pascals pressure law.

pressure = force/area

but cross sectional area is proportional to diameter of the cylinder

therefore

\(\frac{140}{14d } = \frac{f}{d }\)

the diameters will cancel out, and we're left with

force on brake shoes = 10 N

Galileo's observation offered direct proof of a planet orbiting the Sun is the phases of Venus.

Thus, the correct answer is the phases of Venus (B).

By observing the phаses of Venus, Gаlileo wаs аble to conclude thаt Venus must be orbiting the Sun. This is becаuse the phаses of Venus cаn only be explаined if Venus is closer to the Sun thаn Eаrth аnd if it is orbiting the Sun. This observаtion provided direct evidence for the heliocentric model of the solаr system, in which the plаnets orbit the Sun, rаther thаn the geocentric model, in which the plаnets orbit the Eаrth.

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Answer:

The anomalous expansion of water is an abnormal property of water whereby it expands instead of contracting when the temperature goes from 4o C to 0o C, and it becomes less dense.

Explanation:

The density is maximum at 4 degree centigrade and decreases below that temperature as shown in graph.

Kirk's use of math skills in organizing, analyzing, and presenting data is essential for the success and integrity of his scientific investigation.

The correct answer is option B.

Kirk is using his math skills to organize and present his data (Option B). Math skills are integral to the scientific investigation process, particularly when it comes to data analysis, interpretation, and visualization. Here's an explanation of how Kirk is using math skills in his investigation:

1. Organizing Data: Kirk likely collects raw data during his investigation, such as measurements, observations, or experimental results. To make sense of this data, he needs to organize it systematically. This involves using math skills to categorize, sort, and arrange the data in a structured manner, such as in tables or spreadsheets.

2. Analyzing Data: Once Kirk has organized his data, he needs to analyze it to draw meaningful conclusions. This often involves applying various mathematical techniques, such as calculating averages, percentages, standard deviations, or performing statistical analyses. These calculations help identify patterns, trends, and relationships within the data, enabling Kirk to make informed interpretations.

3. Presenting Data: Kirk uses his math skills to visually represent his data through graphs, charts, or diagrams. By selecting appropriate types of graphs (e.g., bar graphs, line graphs, scatter plots), he can effectively communicate the relationships and trends observed in the data to others. Additionally, he may employ mathematical principles, such as scaling the axes, determining appropriate intervals, and using labeling or legends, to ensure accurate and clear representation.

4. Drawing Conclusions: Kirk's mathematical skills are crucial in drawing conclusions from his data. He may use mathematical models, equations, or formulas to analyze the data and test hypotheses. By applying mathematical reasoning, Kirk can determine if his data supports or contradicts his initial hypotheses or research questions.

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Answer:

Evaporation increases with an increase in the surface area

If the surface area is increased, then the amount is of liquid that is exposed to air is larger. More molecules can escape with a wider surface area.

Explanation:

Answer:

30MPH

Explanation:

30/5 = 6 x 5 = 30 mph

This question involves the concepts of the law of conservation of energy and kinetic energy.

The correct option is "A. Yes, the total KE the tires need to transfer out of the system is less than 5,000 J".

According to the law of conservation of energy:

Loss in Kinetic Energy = Work done by the tires

\(\frac{1}{2}mv^2=W\)

where,

W = work done by tires = ?

m = mass of the truck = 1000 kg

v = speed of the truck = 3 m/s

Therefore,

\(W=\frac{1}{2}(1000\ kg)(3\ m/s)^2\)

W = 4500 J

Since the failure limit of work done by the tire is 5000 J, which is greater than the actual work done by the tire in this scenario. Hence, the tire will not fail in this case.

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The attached picture explains the law of conservation of energy.

Answer:

2 1 3

Explanation:

Answer:

the answer is 3,1,2

edg2020

Explanation:

Answer:

The efficiency of the constuction is 9.0

Explanation:

Answer:

  C

Explanation:

Most discussions of refraction will have a diagram similar to that of C.

The angle of incidence is measured from the normal to the boundary, as is the angle of refraction. The product of the sine of the angle and the index of refraction is the same for the media on either side of the boundary.

  n₁·sin(θ₁) = n₂·sin(θ₂)

For media, such as optical fiber, that has an index of refraction greater than 1, the angle of refraction will be smaller in that media than the angle of incidence coming from air.

Figure C applies.

Answer:

5

Explanation:

because you do math and like, yeah

The body's acceleration when the velocity is zero can be found by evaluating the derivative of the velocity-time graph at those points. The acceleration at each instance when the velocity is zero will give the body's instantaneous acceleration at that particular moment.

When the velocity of a body is zero, it means that the body is momentarily at rest. In such cases, we can analyze the body's motion by examining its velocity-time graph.

The points on the graph where the velocity is zero correspond to the instances when the body changes its direction of motion or comes to a temporary halt.

To find the body's acceleration at those instances, we need to calculate the derivative of the velocity-time function. The derivative gives us the rate of change of velocity with respect to time, which represents acceleration.

By evaluating the derivative at the points where the velocity is zero, we can determine the body's acceleration at those specific moments.

It's important to note that the body's acceleration when the velocity is zero can vary depending on the shape of the velocity-time graph and the specific behavior of the body's motion.

The acceleration may be positive if the body is decelerating, negative if it's accelerating in the opposite direction, or zero if the body maintains a constant velocity.

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Answer:

The sailboats average speed was 13 mph.

Explanation:

To calculate the speed of the boat first calculate the total ammountof hours it took the boat to get to its destination. Then divide 144 by that number which comes out to 13.

The average speed of the sailboat is determined as 12 miles per hours.

The average speed of an object in motion is obtained by dividing the total distance traveled by the object with the time spent in the entire journey.

v = total distance/total time

where;

v = 144/12

v = 12 mph

Thus, the average speed of the sailboat is determined as 12 miles per hours.

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Answer:

Explanation:

Group 8A — The Noble or Inert Gases. Group 8A (or VIIIA) of the periodic table are the noble gases or inert gases: helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon (Rn). The name comes from the fact that these elements are virtually unreactive towards other elements or compounds.

Both E and B as 1/\(r^{8}\) so with distance from dipole, they will be changing in same manner. Hence far from the source of the magnetic field they will have same pattern.

An item known as a magnetic dipole generates a magnetic field that is analogous to the field produced by a pair of north and south magnetic poles. Several events can produce a magnetic dipole. North/South pole pairs, such as in permanent magnets, closed current loops, like in solenoids, and naturally occurring magnetic dipoles, like electrons, are examples of magnetic dipoles. These processes all produce magnetic fields that are thought to act like magnetic dipoles and have very similar magnetic field line patterns. The magnetic field lines for north/south pole pairs are roughly the same as those produced by a bar magnet.

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Answer:

a little to late

Explanation:

srry

The duration of the light pulse measured by the pilot of the spaceship is approximately 34.0 μs.

What is light pulse?

A light pulse refers to a brief and localized disturbance or packet of electromagnetic radiation that propagates through space. It is a short-duration burst or wavefront of light energy.

Light pulses can be produced by rapidly changing or modulating a light source, such as a laser. By controlling the duration and intensity of the light emission, one can generate pulses of light with specific characteristics.

According to the theory of special relativity, time dilation occurs when an observer is in relative motion with respect to another observer.

The time dilation factor is given by γ = 1 / √(1 - (v²/c²)), where v is the relative velocity between the observers and c is the speed of light.

In this scenario, the spaceship is moving past Mars with a speed of 0.985c relative to the planet's surface. Since the signal light blinks on and off while the spaceship is directly overhead, the duration of the light pulse observed by the pilot can be calculated using the time dilation formula.

Given that the duration of the light pulse measured by the observer on Mars is 70.0 μs, we need to divide it by the time dilation factor to obtain the duration measured by the pilot:

Δt' = Δt / γ = 70.0 μs / (1 / √(1 - (0.985)²)) ≈ 34.0 μs

Therefore, the duration of the light pulse measured by the pilot of the spaceship is approximately 34.0 μs.

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Answer:

False

Explanation:

Middle of crest to middle of NEXT CREST is wavelength

A piece of steel sinks in water because steel is denser than water. However, a steel ship is a hollow object made of steel and contains a lot of air in it. Due to presence of a lot of air in it, the average density of the ship becomes less than the density of water. Hence a ship floats in water.

Answer:

Cause its a steel block

Explanation:

thats like putting a brick in the water and expecting it to float

To calculate the jumper's speed at this instant, we need to know the tension in the cords, the mass of the jumper, the acceleration at this instant, the initial velocity (which we can assume to be zero), and the time elapsed. Once we have these values, we can plug them into the equation v=u+at to calculate the speed of the jumper.

Assuming we are talking about a jumper who is attached to cords and is currently being pulled upwards, the speed of the jumper at the instant when the tension in the cords is greatest can be calculated using basic physics equations. When the tension in the cords is greatest, it means that the force acting on the jumper is at its maximum. We can use the equation F=ma (force equals mass times acceleration) to calculate the acceleration of the jumper at this instant.
Once we have the acceleration, we can use the equation v=u+at (final velocity equals initial velocity plus acceleration times time) to calculate the speed of the jumper. We will need to know the initial velocity of the jumper, which we can assume is zero if they were stationary before being pulled up by the cords. We will also need to know the time elapsed from the instant when the tension in the cords was greatest.
Therefore, to calculate the jumper's speed at this instant, we need to know the tension in the cords, the mass of the jumper, the acceleration at this instant, the initial velocity (which we can assume to be zero), and the time elapsed. Once we have these values, we can plug them into the equation v=u+at to calculate the speed of the jumper.

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Answer: 24

Explanation: because my brain said..

From the given options let's select the example which shows a conceptual model.

A conceptual model can be said to be a model which shows an abstract representation of any concept which can be visualized or imagined than other models.

It is a model which the designers want users to understand.

From the list, the best option which is an example of a conceptual model is a mental image of gas molecules as tiny balls.

Let's say, for example, you imagine or have a mental picture of gas molecules using your imagination, it helps to understand how a vacuum system works and you can easily solve the problem if something goes wrong.

Therefore, the example of a conceptual model is:

A mental image of gas molecules as tiny balls.

• ANSWER:

A. mental image of gas molecules as tiny balls

The common cause for gas pump fires  is  static electrical discharge.

Static electricity is an imbalance of electric charges within or on the surface of a material or between materials.

In petrol pumps,

During refueling, many petroleum products become electrically charged when they flow through pipes and hoses, including gasoline, kerosene, petrol, diesel etc. which are poor electrical conductors.

Charge remains until it is able to move away by means of an electric current or electrical discharge which causes the static spark that can ignite gasoline vapors, causing a flash fire.

Hence, static electrical discharge is common cause of gas pump fires.

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