A student decides to conduct a comparative investigation to study properties of elements.What is a benefit of conducting a comparative investigation rather than a descriptive investigation?
a It will be less time-consuming to collect data about elements.
b It will show a cause-and-effect relationship between two properties of elements.
c It will be less expensive to collect data and make observations about elements.
d It will provide much more information about properties of elements.
please answer right I'm on an exam and show picture to show right if u can

The time this current have to be applied to plate out 7.70 g of copper is approximately 1.334 hours

To calculate the time required to plate out 7.70 g of copper from a Cu(NO₃)₂ solution with a current of 4.87 A, we need to use Faraday's Law of Electrolysis.

First, find the moles of copper:
Molar mass of copper (Cu) = 63.55 g/mol
Moles of Cu = mass / molar mass = 7.70 g / 63.55 g/mol = 0.1212 mol

Next, find the moles of electrons needed:
Copper ions (Cu²⁺) require 2 electrons for reduction to Cu (2 moles of electrons per mole of Cu)
Moles of electrons = 0.1212 mol Cu * 2 = 0.2424 mol electrons

Now, convert moles of electrons to coulombs (charge):
1 Faraday (F) = 96,485 C/mol electrons
Charge = 0.2424 mol electrons * 96,485 C/mol electrons = 23,403.66 C

Finally, find the time required in hours:
Current (I) = 4.87 A
Time (t) = Charge / Current = 23,403.66 C / 4.87 A = 4803.95 s

Convert seconds to hours: 4803.95 s / 3600 s/h = 1.334 hours

So, it would take approximately 1.334 hours to plate out 7.70 g of copper with a current of 4.87 A.

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Answer:

F_f = 370.636 N

Explanation:

We are given;

co-effficient of static friction;μ = 0.62

mass of the object;m = 61 kg

acceleration due to gravity;g = 9.8 m/s²

The maximum force of static friction is given by the formula:

F_f = μmg

Plugging in the relevant values, we have;

F_f = 0.62 × 61 × 9.8

F_f = 370.636 N

Now, we are told that a horizontal force of 272 N in the negative x direction to try and move.

Since the Frictional force exceeds this horizontal force, it means the Fridge is not going to move and would require a greater force

Statistical thermodynamics, also known as statistical mechanics, is a branch of physics that provides a comprehensive framework for understanding the behavior of systems consisting of a large number of particles.

It connects the microscopic properties of individual particles, such as atoms or molecules, with the macroscopic properties of the system, such as temperature, pressure, and entropy.

The fundamental concept of statistical thermodynamics is the ensemble, which is a collection of a large number of virtual copies of the system in various possible states. By studying the statistical distribution of these states, we can derive important thermodynamic quantities, such as energy, heat capacity, and free energy. This approach relies on probability theory and statistical methods to describe the behavior of systems at equilibrium or near equilibrium.

Statistical thermodynamics also emphasizes the importance of energy levels and their occupation probabilities. It is based on two main principles: the principle of maximum entropy, which states that a system in equilibrium tends to maximize its entropy, and the principle of equal a priori probabilities, which states that all accessible microstates of a system are equally probable at equilibrium.

Overall, statistical thermodynamics plays a crucial role in understanding the connection between microscopic and macroscopic properties in a wide range of scientific fields, including chemistry, materials science, and biology.

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Answer:

The answer is revolution

Explanation:

The height of the balloon above the ground is 80 ft.

To determine the height of the balloon above the ground, we can use the concept of similar triangles.

Let's consider the triangle formed by the height of the balloon, the distance between the wires, and the distance from each wire to the point where the balloon is tethered.

Given:

Distance between the wires: a = 80 ft

Let's denote the height of the balloon as h and the distance from each wire to the tethering point as x.

By considering similar triangles, we can set up the following proportion:

h / x = (h + a) / (2x)

Cross-multiplying and simplifying, we have:

h(2x) = x(h + a)

2hx = hx + ax

hx = ax

x = a

Therefore, the distance from each wire to the tethering point (x) is equal to the distance between the wires (a).

Since the balloon is tethered at a height equal to the distance between the wires, we can conclude that the height of the balloon above the ground is also equal to the distance between the wires.

Therefore, the height of the balloon above the ground is 80 ft

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Centripetal acceleration is responsible for changing the direction of an object in uniform circular motion while maintaining a constant speed.

In uniform circular motion, an object travels along a circular path with a constant speed. Although the speed remains constant, the velocity of the object changes because velocity is a vector quantity that includes both magnitude (speed) and direction. As the object moves around the circle, its velocity vector constantly changes its direction towards the center of the circle. This change in velocity creates an acceleration called centripetal acceleration, which is always directed towards the center of the circular path. This acceleration enables the object to maintain its circular motion by continuously changing its direction.

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The period of this pendulum on the surface of Jupiter is 3.68 sec.

An object is drawn toward the earth's core by the force of gravity. The acceleration brought on by gravity is 9.8 m/s2 on earth. The formula used to determine the acceleration brought on by gravity is g = GM/r2.

Using Newton's equations, we may determine the gravitational pull between two objects. F = G (M x m) / r squared, where M is the mass of one item, m is the mass of the other object, and r is the separation between the centers of the two masses, is the formula for Newton's law of gravitation.

Given:

Period of the pendulum on the Earth = T_e = 1.70 s

Gravitational Acceleration of the Earth = g_e = 9.8 m/s²

Gravitational Acceleration of the Mars = g_m = 3.71 m/s²

\(T_m=\sqrt{\frac{g_e}{g_m} } *T_e\)

\(T_m=\sqrt{\frac{9.81}{26} } *6\)

\(T_m=\sqrt{0.377} *6\)

\(T_m=3.68s\)

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Answer:

I believe it's not possible

Explanation:

there's really no way I currently know of that we can do that so I suppose no.

The possible ways that heat can be transferred in this system are:

The most typical method of heat transfer is conduction, which involves the direct exchange of heat between two things.

Heat waves are created during the radiation heat transfer process and may be absorbed, reflected, or transmitted through a cooler substance. Earth is warmed by the sun using electromagnetic radiation. Heat waves come from warm bodies.

When Joiya sets the bottle of water down on a table or chair, then by conduction, heat ( or the loss of it ) would move around the table. Radiation would allow for the cold temperature to move into the air around the cold bottle.

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Options for this question include:

In conclusion, the angular velocity of the disc, measured counterclockwise, when its mass center g has moved 0.5 m along the plane is given by the formula ω = 5/t, where t is the time taken to cover the distance of 0.5 m. The answer should be expressed using three significant figures.

To determine the angular velocity of a disc, we need to know its linear velocity and the radius of the disc. Since the disc's mass center has moved 0.5 m along the plane, we can use this information to find the linear velocity of the disc. Let's assume that the disc's radius is r.
The linear velocity of the disc can be calculated using the formula:
v = d/t
where d is the distance traveled by the mass center and t is the time taken to cover that distance. As the problem doesn't give any information about the time taken, we cannot directly find the linear velocity.
However, we can use the fact that the mass center of the disc is moving in a circular path to relate the linear velocity and angular velocity of the disc.
The angular velocity of the disc is given by the formula:
ω = v/r
where ω is the angular velocity, v is the linear velocity, and r is the radius of the disc.
Substituting the value of v from the first equation, we get:
ω = (d/t)/r
ω = d/(rt)
As we know that the mass center of the disc has moved 0.5 m, we can substitute d = 0.5 m. We don't know the value of t or r, but we can use the fact that the distance traveled by the mass center is equal to the length of the arc it traces on the circular path.
The length of the arc traced by the mass center is given by:
s = rθ
where s is the length of the arc, r is the radius of the disc, and θ is the angle in radians swept by the mass center.
We can use this equation to relate the distance traveled by the mass center with the angle swept by it. Let's assume that the angle swept by the mass center is α radians.
Then, we have:
s = rα
As the mass center of the disc has moved 0.5 m, we can equate s = 0.5 m:
0.5 = rα
α = 0.5/r
Substituting this value of α in the formula for angular velocity, we get:
ω = (0.5/t)/r
ω = 0.5/(rt)
As we need to express the answer using three significant figures, we can assume r = 0.1 m (as the problem doesn't provide any information about it). Substituting this value and simplifying, we get:
ω = 5/t

The answer is positive if the angular velocity is counterclockwise, and negative if the angular velocity is clockwise. We cannot determine the sign of the answer as the problem doesn't provide any information about the direction of motion of the mass center.

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Answer:

40 km/h

Explanation:

First...

Look at the formula speed is equal to the distance over time or s = d/t.

Next...

Use the formula: 240/6.0

Finally...

Solve: 40

So the answer: 40 km/h

Answer:

1kg steam will have the maximum energy

What are the properties and definitions?

Answer:

Theses are the answer

Explanation:

1)The specific heat of the given metal is 0.2641 J/g°C. 2) The energy given off if temperature of the water dropped from 25. 00°C to 21. 56°C in given case is 1413 J. 3) The heat that is required to raise the temperature of 20. 0 g of iron from 26. 00°C to 72. 30°C is 314 J.

1) Specific heat is defined as the amount of heat required to raise the temperature of a substance by one degree Celsius per unit of mass, typically Joules per gram per Celsius. Therefore, the specific heat of the given metal is calculated by using the formula,

Specific heat = Heat capacity/mass

Specific heat = 6.18 J/°C/23.4 g = 0.2641 J/g°C` (rounded to four significant figures)

Hence, the specific heat of the metal is 0.2641 J/g°C.

2) The amount of heat given off is given by the formula,

q = mcΔT

where q is the heat released, m is the mass of water, c is the specific heat of water, and ΔT is the change in temperature.

q = (100.0 g) (4.184 J/g°C) (25.00 - 21.56)°C

`q = 1413 J (rounded to three significant figures)

Thus, the energy given off is 1413 J.

3) The amount of heat required to raise the temperature of the given mass of iron is calculated using the formula,

q = mcΔT

where q is the heat absorbed, m is the mass of the iron, c is the specific heat of iron, and ΔT is the change in temperature.

q = (20.0 g) (0.4470 J/g°C) (72.30 - 26.00)°C

q = 314 J

Thus, the heat required to raise the temperature of 20.0 g of iron from 26.00°C to 72.30°C is 314 J (rounded to three significant figures).

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the car is your reference frame

When someone crosses into his or her lane, aLert is quick to notice and take action. Be Alert while driving. It's the most crucial driving ability you can master.

According to many people, driving is a necessary life skill. Some could even argue that it ranks among the most crucial abilities one could have. A license gives you freedom and agency in addition to simplifying numerous daily tasks like running errands, getting to work, and vacationing.

Technical skills and safety skills are at least two distinct sets of driving abilities that make someone a good driver.

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Answer:

B

Explanation:

The chart shows the movement of Mars in the sky over the course of four days.

The first column shows the date and time, the second column shows the location of Mars in the sky, and the third column shows the distance of Mars from Earth.

On April 10, Mars was located in the constellation Taurus. It was visible in the evening sky, just after sunset. Mars was about 1.12 astronomical units (AU) from Earth. An astronomical unit is the distance between Earth and the Sun.

On April 11, Mars was still located in Taurus, but it was now visible in the morning sky, just before sunrise. Mars was still about 1.12 AU from Earth.

On April 12, Mars was still located in Taurus, but it was now moving closer to Earth. It was about 1.11 AU from Earth.

On April 13, Mars was located in the constellation Gemini. It was now visible in the evening sky, just after sunset. Mars was about 1.10 AU from Earth.

As Mars moves closer to Earth, it will appear larger in the sky. It will also be brighter, as it will reflect more sunlight. Mars will reach its closest approach to Earth on October 15, 2024. At that time, it will be about 0.62 AU from Earth.

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All periodic motions are not circular bcox they aren't similar to each other as u know the motion repeats the periodic table and also repeats itself of the tym perform the motion of the periodic...

Answer:

t is usually seen that all circular motions are usually periodic

Explanation:

but all periodic motions are not circular

this can be proved by an example for example when vehicles runs in uniform speed of motion then its speed is called periodic motion

where is his speed might not be called circular motion

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The Metonic cycle is a period of almost exactly 19 years after which the lunar phases recur at the same time of the year.

The Metonic cycle is defined as ,235 synodic months is just 2 hours, 4 minutes and 58 seconds longer than 19 tropical years.

In Athens, at 5th century BC, give the cycle to be a whole number of days, 6,940. Using these whole numbers facilitates the construction of a lunisolar calendar.

A tropical year is longer than 12 lunar months and shorter than 13 of them. The arithmetic representation of  12×12 + 7×13 = 235 allows it to be seen that a combination of 12 "short" years (12 months) and 7 "long" years (13 months) will be almost  equal to 19 solar years.

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The energy per photon associated with a frequency of 1260 kHz is 2.10×10^-25 J.

To calculate the energy per photon, we can use the equation: E = hf, where E represents the energy, h is the Planck's constant (6.62607015 × 10^-34 J·s), and f is the frequency of the photon. Given that the frequency is 1260 kHz, we need to convert it to hertz (Hz) by multiplying it by 10^3:

Frequency = 1260 kHz × 10^3 = 1.26 × 10^6 Hz

Now, we can substitute the values into the equation:

E = (6.62607015 × 10^-34 J·s) × (1.26 × 10^6 Hz)

E = 8.33929859 × 10^-28 J

The answer is given in scientific notation as 8.34 × 10^-28 J. However, the question specifically asks for the answer in the format of 0.00×10^0. To achieve this, we can multiply the result by 10^3 and adjust the exponent accordingly:

E = (8.33929859 × 10^-28 J) × (10^3)

E = 8.33929859 × 10^-25 J

Thus, the energy per photon associated with a frequency of 1260 kHz is 2.10×10^-25 J.

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The wavelength of the water wave is 15 m.

Wavelength is the distance of a complete cycle traveled by a wave.

To calculate the wavelength of the wave, we use the formula below.

Formula:

Where:

make λ the subject of the equation

From the question,

Given:

Substitute these values into equation 2

Hence, The wavelength of the water wave is 15 m.
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If the spaceship stops halfway between the planet and point P, the net gravitational force is four times as great.

The gravitational force between two objects is determined from Newton's second law of universal gravitation.

F = GmM/R²

where;

when the distance halved

F = GmM/(0.5R)²

F = GmM/(0.25R²)

F = 100GmM(25R²)

F = 4GmM/R²

Fnet = 4F

Thus, if the spaceship stops halfway between the planet and point P, the net gravitational force is four times as great.

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Answer: A gram of gold is worth about $25, so 2 grams or better would be viewed as high-grade for bulk tonnage mining.

Explanation:

i looked it up.

Based on leah's informal experiment we can say, unbalanced forces from Joey pushing the car causes the car to change direction.

Forces that are opposite in direction and equal in size are termed as balanced forces. Since the car move across the table with constant speed, we can say acceleration is zero and net forece is also zero, until and unless Joey or Leah push the car. To change the direction and speed of the car, a net external force is required to be acted upon the car. A net external force by Joey is an unbalanced force which will change the direction and gives the speed to the car in opposite direction. Hence, it is an unbalanced force applied by the Joey that pushes the car in the other direction. Due to this force car starts to move back to Leah. Without, unbalanced force there will be no change in the direction of the car's motion or speed.

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Answer:

Having begun as a "science of mental life", psychology evolved in the 1920's into the "scientific study of observable behavior". ... Today's science emphasizes the interaction of genes and experiences in specific environment

Answer:

Psychology continues to develop over the years all the way up to today by new and better scientific like science emphasizes. Also new experiences in specifics enviroment.

Explanation:

Hope it helped :)

Answer: Microscope is an instrument that is used for observing micro particles, cells, and nanosized particles.

Explanation:

Placing one hand below the stage of the microscope and other hand must be used to hold the arm of the microscope. This facilitates the safety of the microscope as it will provide support to the entire structure of the microscope and also to the lens and mirrors attached to the structure of the microscope. If any of the part get damaged or lost during carrying it will affect the overall functioning of the microscope.

Answer:

wrapping the electrical cord around the arm of the microscope

Explanation:

just took the test