What is the primary classification trait used to explain how scientists divide rocks into the three classification groups?
a. Composition
b. Formation
c. Location
d. Texture

Work done  if the crane lifts the ball from ground level to 50 ft in the air by drawing in the cable. is 67208.4Joule.

In material science, work is the energy moved to or from an item through the utilization of power along a dislodging. In its least complex structure, for a consistent power lined up with the heading of movement, the work rises to the result of the power strength and the distance voyaged. A power is said to accomplish positive work if when applied it has a part toward the removal of the place of utilization. A power accomplishes negative work on the off chance that it has a part inverse to the heading of the uproot.

So,here potential energy store in a wrecking ball is equal to work done by crane.

We know that potential energy is =mgh

Here m=1000-lb,h=50ft,g=9.8m/sec²

=>W=1000×50×9.8m/sec²

In 1lb=0.45kg and 1ft=0.3048m

Therefore,W=1000×0.45×50×0.3048×9.8=67208.4Joule.

Hence,work done by crane is 67208.4Joule.

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When the water balloon is thrown from the second floor window, it accelerates due to gravity and its velocity increases as it falls. At the moment the balloon hits the ground, it will be travelling at 12.0 m/s.

This is because the balloon has been subject to a constant acceleration of 9.81 m/s throughout its entire fall, and so its velocity at the point of impact will be the same as its initial velocity when it was first released.

Therefore, the balloon will be travelling at 12.0 m/s when it hits the ground. This figure can be expressed to three significant figures as 12.0 m/s.

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The velocity of ship A observed from ship B is approximately -0.958c, and the velocity of ship B observed from ship A is  0.958c.

To calculate the relative velocities of ship A and ship B, we can use the relativistic velocity addition formula:

v_rel = (v1 + v2) / (1 + (v1 * v2) / c²)

For ship A observed from ship B, let v1 = 0.687c and v2 = -0.863c (negative because they're moving in opposite directions):

v_A_from_B = (0.687c - 0.863c) / (1 + (0.687c * -0.863c) / c²)
v_A_from_B ≈ -0.958c

For ship B observed from ship A, let v1 = -0.687c and v2 = 0.863c:

v_B_from_A = (-0.687c + 0.863c) / (1 + (-0.687c * 0.863c) / c^²)
v_B_from_A ≈ 0.958c

So, the velocity of ship A observed from ship B is approximately -0.958c, and the velocity of ship B observed from ship A is approximately 0.958c.

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The final temperature of the water can be calculated using the formula Q = m x c x ΔT, where Q is the heat absorbed, m is the mass of the water, c is the specific heat capacity of water, and ΔT is the change in temperature.

First, we need to convert the volume of water to mass. The density of water is 1 g/ml, so 80.0 ml of water has a mass of 80.0 g.

Next, we can plug in the given values into the formula:

422 J = 80.0 g x 4.184 J/g°C x ΔT

Solving for ΔT, we get:

ΔT = 422 J / (80.0 g x 4.184 J/g°C) = 1.27°C

Therefore, the final temperature will be 1.27°C higher than the initial temperature. Without knowing the initial temperature, we cannot determine the exact final temperature. However, we do know that the temperature will increase by 1.27°C due to the absorption of 422 joules of heat.

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The evidence which is an indication that a chemical reaction has occurred is the formation of a precipitate and is denoted as option B.

This is the referred to as the type of change which occurs when a new substance is formed and it involves a chemical reaction. Physical change on the pother hand doesn't involve the production of a new substance.

Chemical change in this scenario is a precipitate forming because it depicts a new substance and chemical reactions took place before it occurred which is therefore the reason why option B was chosen as the correct choice.

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The property of a system that enables it to do something or make something happen, including the capacity to do work is called energy.

Energy is the ability of a system to perform work or bring about change is represented by the fundamental idea of energy in physics. It has magnitude but no direction because it is a scalar quantity.

The principle of energy conservation states that energy can be changed from one form to another and that the overall energy of a closed system stays constant. Energy can, however, be converted or transported across various systems or objects, enabling movement or changes to take place.

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the volume of this rectangular crystal is 3.354 × 10⁻⁴ m³.

Option b) 3.354 × 10⁻⁴ m³ is the correct answer.

Given the data in the question;

Length of the rectangular box \(=8.6 * 10^{-2} m\)

Width of the rectangular box \(=5.0 * 10^{-2} m\)

Depth of the rectangular box \(=7.8 * 10^{-2} m\)

Now, we know that formula for calculating the volume of a rectangular box or prism is;

Volume = Length × Width × Height or depth

So, we simply input our given values into this formula

\(Volume = ( 8.6 * 10^{-2}) ( 5.0 * 10^{-2}) ( 7.8 * 10^{-2})\)

\(Volume = 0.0003354 m\)

\(Volume = 3.354 * 10^{-4} m^3\)

Therefore, the volume of this rectangular crystal is 3.354 × 10⁻⁴ m³

Option b) 3.354 × 10⁻⁴ m³ is the correct answer.

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False.The seasons on earth are Not caused by its elliptical orbit around the sun.

The seasons on Earth are not caused by its elliptical orbit around the Sun. The seasons are primarily caused by the tilt of Earth's axis relative to its orbit around the Sun. Earth's axis is tilted at an angle of approximately 23.5 degrees, and as Earth orbits the Sun, different parts of the planet receive varying amounts of sunlight throughout the year.

During summer in a particular hemisphere, that hemisphere is tilted towards the Sun, resulting in longer days, more direct sunlight, and warmer temperatures. In contrast, during winter, that hemisphere is tilted away from the Sun, leading to shorter days, less direct sunlight, and cooler temperatures. The equinoxes, which occur in spring and autumn, are the times when the tilt of Earth's axis is neither towards nor away from the Sun, resulting in roughly equal lengths of day and night.

While Earth's elliptical orbit does contribute to slight variations in the intensity of sunlight received throughout the year, it is the axial tilt that is the primary cause of the seasons.

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The magnitude of the vector displacement is 15.65 m.

The resultant force acting on the object is calculated as follows;

\(F = \sqrt{F_x^2 + F_y^2} \\\\F = \sqrt{4^2 + 6^2} \\\\F = 7.21 \ N\)

The displacement of the vector is calculated as follows;

W = Fs cosθ

\(s = \frac{W}{Fcos(\theta)} \\\\s = \frac{106}{7.12 \times cos(18)} \\\\s = 15.65 \ m\)

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Answer:

its very easy

Explanation:

The substitution method is a quick and easy way to algebraically solve a set of linear equations and determine the variables' solutions.

Thus, According to what the name implies, this method entails determining the value of the x-variable in terms of the y-variable from the first equation and then substituting or replacing the value of the x-variable in the second equation.

One of the algebraic techniques for solving simultaneous linear equations is the substitution approach. It entails changing any variable's value from one equation to the other by substituting it in.

The cross multiplication method and the elimination method are the other two algebraic strategies for resolving linear equations and variables.

Thus, The substitution method is a quick and easy way to algebraically solve a set of linear equations and determine the variables' solutions.

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Answer:

a) Pascal is a derived unit because it is derived from the unit of force and area

b)Mass is a fundamental quantity because it doesn't depends upon others physical quantity and made up of only one unit

c) unit of power is a derived unit because they are dependent quantities

D) unit of length is a fundamental unit because it cannot be expressed in terms of another quantity.

Answer:

An object is considered to be accelerating if the object is changing its rate in speed, decreases in speed, or changes the object's direction

Answer:

B.

Goals are scored by kicking the ball through goalposts.

Explanation:

Answer:

5 m

Explanation:

formula,

speed = frequency x wavelength

speed / frequency = wavelength

sub in values

65/ 13 = wavelength

5 m = wavelength

hope this helps please mark

Answer:

The atomic number tells us the number of protons.

Explanation:

Hope this helps and I hope u have an Amazing day!!

Answer:

It is a Renewable Energy Source. It's Low Maintenance. It also saves you money in the future.

Disadvantage. Solar Energy Storage Is Expensive,Uses a Lot of Space. The initial cost of purchasing a solar system is fairly high

Explanation:

advantages

disadvantages

hope that helps :))

Answer:

Both graphs are linear with positive slopes, but the second graph has a steeper slope than the first graph. I just took the quick check so I know the answer from Connexus.

Explanation:

Since the first graph goes over 1 second and up 2 meter/s then that would mean it is less steep than the graph that goes over 1 second and up 4 m/s; so this rules out option A. Now for C and B, it says a constant "Horizontal line" which would be wrong for the case because the slopes are not going sideways, the slopes in the question are going in a slanted vertical constant motion. I hope this helps!  

Both graphs are linear with positive slopes, but the second graph has a steeper slope than the first graph, therefore the correct answer is option A.

The rate of change of the velocity with respect to time is known as the acceleration of the object. Generally, the unit of acceleration is considered as meter/seconds².

As given in the problem Suppose you are looking at two graphs of velocity vs time.

The first graph is of an object undergoing constant positive acceleration of 2 meters/second², and the second graph is of an object undergoing constant positive acceleration of 4 meters/second².

The second graph has a higher slope than the first, but both graphs are linear with positive slopes, thus option A is the right response.

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Different wavelengths of light result in various color perceptions. Whereas violet is perceived by the shortest wavelengths, red is perceived by the longest ones.

Frequency and wavelength are two important characteristics of a wave cycle. A further definition of "wavelength" is the distance between any two matching positions on adjacent waves. Frequency is another word for the number of waves that pass through a specific location in a specific amount of time.

The wavelength is the space between successive crests, whereas the frequency is the quantity of crests that impact the beach per second. The only distinction is that we do so when discussing light rather than water.

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Balloon A is positively charged, and balloon C is negatively charged. If balloon A approaches balloon C, there will be an electrostatic force of attraction between them.

When two objects carry opposite charges, they exert an attractive force on each other. This force is known as the electrostatic force and follows Coulomb's law. According to Coulomb's law, the magnitude of the electrostatic force between two charged objects is directly proportional to the product of their charges and inversely proportional to the square of the distance between them. In this scenario, since balloon A is positively charged and balloon C is negatively charged, they have opposite charges. Therefore, the electrostatic force between them will be attractive. The magnitude of the force depends on the charges of the balloons and the distance between them. It is important to note that without specific information about the charges of the balloons and their distance, it is not possible to determine the exact magnitude of the force. To calculate the force, you would need the values of the charges and the distance between the balloons.

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Answer:

1st is magnetic waves. second one is air.

A laser beam passes from air into a 25% glucose solution at an incident angle of 37°.

We can use Snell's Law to solve both parts of this question.

Part 1

Snell's Law states that

n1 sinθ1 = n2 sinθ2

Where n1 and n2 are the indices of refraction of the two media, θ1 is the incident angle, and θ2 is the refracted angle.

In this case, n1 = 1 (for air) and n2 = 1.33 (for the 25% glucose solution). We are given θ1 = 37°. Solving for θ2, we get

sinθ2 = (n1/n2) sinθ1

sinθ2 = (1/1.33) sin(37°)

sinθ2 = 0.516

θ2 = 31.7°

Therefore, the direction of the light in the glucose solution is at an angle of 31.7° relative to the normal.

Part 2

In this case, we are going from ethyl alcohol to air, so n1 = 1.36 and n2 = 1. We are given θ1 = 12°. Solving for θ2, we get

sinθ2 = (n1/n2) sinθ1

sinθ2 = (1.36/1) sin(12°)

sinθ2 = 0.188

θ2 = 11.0°

Therefore, the angle of the refracted beam in air is 11.0°.

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Answer: 1000 Hz · 0,5 m = 500 m/s

Explanation: speed = frequency · wavelength

The final momentum of the skater is 3.77 m/s.

Momentum is the product of mass and acceleration. Recall that the principle of conservation of linear momentum states that total momentum before collision must equal the total momentum after collision.

Thus;

(50 Kg × 0 m/s) + (55Kg ×  7.2m/s) = (50 Kg + 55Kg) v

v =  (55Kg ×  7.2m/s)/(50 Kg + 55Kg)

v = 396/105

v = 3.77 m/s

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Answer:

\(4ms^{-2}\)

Explanation:

F = ma

Rearrange to get acceleration on its own:

a = \(\frac{F}{m}\)

Substitute 20 for F and 5 for m:

a = \(\frac{20}{5}\) = 4 meters/second/second

Hence, the acceleration will be 16 m/s²

According to Newton's second law of motion, acceleration of an object is directly proportional to the net force acting on it keeping the mass of the object constant.

Mathematically,

F ∝ a

It means that when there is no net force acting on the body, there is no acceleration. A force is a push or a pull, and the net force ΣF is the total force, or sum of the forces exerted on an object in all directions. When the net force is increased or decreased by a factor of X, then acceleration also increased or decreased by a factor of X respectively according to Newton's 2nd law of motion.

F = ma

(-2)F = 4x8 N

(-2)F = 32 N

So, acceleration = 16 m/s²

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When a transparency sheet is rubbed with a tissue and the transparency and tissue are then held at rest a short distance apart the two objects exert electric forces on each other because electrons are rubbed off of one and onto the other. The correct option is "the two objects exert electric forces on each other, because electrons are rubbed off of one and onto the other."

When a transparency sheet is rubbed with a tissue, the two objects develop electric charges. The tissue becomes negatively charged as a result of this rubbing because electrons are transferred from the transparency sheet to the tissue.

As a result, the transparency sheet becomes positively charged. These charges create electric forces that cause the two objects to be attracted to one other.

As a result, they exert electric forces on each other. Therefore, the most appropriate answer to the given question is that the two objects exert electric forces on each other because electrons are rubbed off of one and onto the other.

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The angular frequency of this motion is 5.46 rad/s.

The oscillation of spring is an example of Simple Harmonic Motion(SHM).

The general equation of an SHM is given by the formula.

X = Acos(wt)

Here A is the amplitude

ω is the angular frequency

T is the time

Comparing the above equation with the given condition,

X = 17.4 cm cos(5.46t)

A = 17.4 cm

ω = 5.46 rad/s

T = 1 s

Hence, the angular frequency of this motion is 5.46 rad/s.

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