What are graphs used for? Select all that apply.

analyzing what data means
forming experiments
diagram showing the correlation between two quantities
predicting outcomes and patterns

The correct answer is C. Velocity is a vector and requires a direction.

Explanation:

In physics both speed and velocity are used to study the motion of a body; however, they are slightly different. In the case of speed, this describes the rate of change in position based on distance and time, because of this, speed is based on a magnitude or quantity. On the other hand, velocity is a vector because it does not only includes a change of position but the direction of motion usually based on a specific location reference.

Considering this, it can be concluded the difference between speed and velocity is that "velocity is a vector and requires a direction" because velocity includes both the distance and time (speed) along with the direction while speed focuses only on time and distance.

The difference between speed and velocity is that C) velocity is a vector and requires a direction

Vector is a quantity that has a value and direction

Vector can be symbolized in the form of directed line segments

[tex]\large {\boxed {\bold {\overrightarrow{A}}}[/tex]

while the length of the vector is denoted by | a |

Vectors can be written in the form of sequential pairs which shows their coordinates in the Cartesian plane: a (a₁, a₂)

with length

[tex]\large {\boxed {\bold {|a|=\sqrt{a_1^2+a_2^2}  }}[/tex]

If the direction of the vector is reversed, we get the vector -a which has the same length but in the opposite direction

Operations on vectors include addition and subtraction. Addition of vector a and vector b can be done in a triangular way where the base point of vector b coincides with the endpoint of vector a

The sum of the two is obtained by pulling the line segment from the base point of the vector a to the endpoint of the vector b which results in a new vector c

So a + b = c

If vector a is added by inverse b (-b) then the sum becomes a + (- b) = a-b

If a vector is multiplied by a scalar number (eg denoted by k) then the new vector becomes k | a |.

If k> 0, the new vector is in the direction of vector a, but if k <0 it will be in the opposite direction

A vector has a direction and a magnitude, while a scalar has only a magnitude.

Examples of scalars are: length, mass, time, speed

Examples of vectors are: force, acceleration, velocity

the average velocity

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resultant velocity

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the coin velocity

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Keywords: vector, speed, velocity

Im not sure about this one but the one i will go for is a.

Answer:

the acceleration will be 10 m/s^2

Explanation:

the force applied to an object and the acceleration of the object are directly proportional, as Newton's second law states:

[tex]F=ma[/tex]

where

F is the net force applied to the object

m is the object's mass

a is the object's acceleration

in the first example, a force F=45 N is applied to the object, giving it an acceleration of a=5 m/s^2. Therefore, the mass of the object is

[tex]m=\frac{F}{a}=\frac{45 N}{5 m/s^2}=9 kg[/tex]

In the second example, the force is doubled, so it will be F=90 N. The mass is still m=9 kg, so the acceleration will be

[tex]a=\frac{F}{m}=\frac{90 N}{9 kg}=10 m/s^2[/tex]

i believe it is element or compound

Answer:

d

Explanation:

Light waves coming from the sun can be converted into electricity though the solar cell. Hence, option D is correct.

A solar cell, also known as a photovoltaic cell, is any apparatus that directly converts light energy into electrical energy using the photovoltaic effect. The vast majority of solar cells are made of silicon, which can be found in amorphous (noncrystalline), crystalline, and crystalline (single crystal) forms, with varying degrees of efficiency and cost.

Solar cells do not use redox energy or require fuel to generate electricity, making them unlike batteries. They also do not include any moving parts, making them unlike electric generators.

Arrays, which are big collections of solar cells, are possible. These arrays, made up of thousands of individual cells, can serve as central electric power plants, converting solar energy into electrical energy and distributing it to consumers in the industrial, commercial, and residential sectors.

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The color reflected by a red object is red itself. Red color absorbs all colors but reflect red only. Hence, the bike painted red color will appear red only.

Reflection is the phenomenon of waves traveling through a medium when hit on a transparent object return, back in a straight line.  Reflection of light waves make the transparent object gleaming.

Different colors absorbs from different wavelengths. White light absorbs all colors and reflect all of them. That's why it appears as the mix of all colors white. Black color absorbs all color but reflect nothing. Thus appears black.

Red and green colors absorb all colors but, reflect the particular color only. Therefore, the bike painted red color will reflect red and appears red only.

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The color of light reflected by a bike painted red is red because the paint absorbs other colors and reflects red wavelengths. The perceived color of an object is determined by the specific wavelengths of light it reflects due to its pigments.

If your new bike is painted so that it looks red, then the color of light reflected by the paint is red. This is because the paint absorbs other wavelengths of light and only reflects the red wavelengths to your eyes. The principle behind why objects have color can be explained by absorption and reflection of light. When white light (which is a mixture of all visible wavelengths) hits an object, certain wavelengths are absorbed, and others are reflected. The reflected light is what we perceive as the color of the object.

Therefore, for a red bike, the paint contains pigments that specifically absorb most of the other colors in the light spectrum but reflect red light. Similarly, a blue object would reflect blue light and absorb other colors, which answers why a blue section of a color wheel looks blue. Likewise, a yellow section appears yellow because it reflects red and green light, which together make yellow, and absorbs blue light.

Instantaneous velocity is the rate of change of an object's displacement at a specific instant or point in time, as opposed to over an extended period.

The instantaneous velocity of an object is the rate of change of the object's displacement with respect to time at a specific instant. Unlike average velocity, instantaneous velocity considers not the total distance and total time but the position of the object at a particular instant. For example, if a car moves with different speeds and you want to know the velocity of the car at the 5th second, you would be looking for the car's instantaneous velocity at that specific time.

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The object is at rest.

This is due to the fact hwen two forces act upon each other on opposite sides, the movement of the object does not change due to the net force equaling 0.

Blueberries is the correct answer

There are no accurate descriptions on the list of choices you provided.

Answer:

The SI System, Which is based on the metric has been more widely adopted than the english system and is harder to use.

Explanation:

initial speed by which Hilary is walking = 1.3 m/s

Now the rate of increase in her speed that is her acceleration is given by

[tex]a = 0.090 m/s^2[/tex]

now we need to find her final speed after t = 10 s

so here we can use the kinematics equation in order to find the final speed

[tex]v_f = v_i + at[/tex]

now plug in all data in the above equation

[tex]v_f = 1.3 + (0.090 * 10)[/tex]

[tex]v_f = 1.3 + 0.90[/tex]

[tex]v_f = 2.2 m/s[/tex]

so here the final speed will be 2.2 m/s after she accelerates

Your answer is 40 degrees Celsius

104f in celsius is 40c

Answer:

When a physical change occurs, the mass of the substance is conserved. This means that the total mass of the substance remains the same from beginning to end. The physical properties of the substance, such as size and shape, may change, but the amount of matter in the substance does not change.

Explanation:

The mass is conserved during a physical change is observed by the fact that the amount of matter in the substance does not change.

According to the principle of conservation of mass, a mass can neither be created or destroyed. It can only be converted into another form.

When a physical change occurs, the mass of the object is constant. The initial mass of the object is equal to the final mass of the object. The physical change like size and shape may occur, but the mass of the object does not change.

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To determine how far from the base of the dorm Allison should stand to catch the ball, principles of projectile motion are applied using the known angle, speed, and vertical distance. The time of flight for the vertical motion is calculated first, then used to find the horizontal distance where Allison should be positioned.

To solve the problem of where Allison should stand to catch the ball thrown by Emily, we need to apply the principles of projectile motion. The ball is thrown at an angle of 30° below the horizontal with a speed of 14 m/s, and it falls a vertical distance of 4.0 m. We can use these parameters to calculate the time of flight for the vertical motion and then apply that time to the horizontal component of motion to find how far from the base of the dorm Allison should stand to catch the ball.

First, we calculate the time taken for the ball to drop 4.0 m using the equation of motion: s = ut + (1/2)gt², where u is the initial velocity in the vertical direction, g is the acceleration due to gravity (approximated as 9.8 m/s²), and s is the vertical displacement.

Since the vertical component of the initial velocity (u_y) is negative in this case (as the ball is thrown below the horizontal), we must consider u_y = 14sin(-30°) = -7 m/s. The vertical displacement is -4.0 m (downwards). Plugging these values into the equation, we can solve for t.

Once we've found the time t, we then calculate the horizontal distance using the horizontal component of the initial velocity (u_x): u_x = 14cos(30°). The horizontal distance (x) can be found using the equation: x = u_x * t.

Through these calculations, we will be able to determine the distance at which Allison should stand to catch the ball.

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Answer:

False

Explanation:

When the object hits the water, it's not adding weight to the object, but is changing the force of the waves in the water. They wouldn't be balanced and this wouldn't determine if the object would stop. However, with more informational variables with precise measurements the answer may alter.

  a₁=2.9 m/s^2          t₁=8 s

   v₁=a₁*t₁= 2.9*8 m/s

  a₂=-1.7 m/s^2          t₂=2.7 s

   v₂=v₁-a₂*t=2.9*8-1.7*2.7 m/s

Answer:

Water is a simple compound.

Explanation:

Water, from first glance, is a simple compound. This is because it is made up of two atoms - hydrogen and oxygen. This gives the formula:

[tex]H_{2}O[/tex]

In the simple compound, one atom of oxygen is bound to two hydrogen atoms like this:

[tex]H - O - H[/tex]

The bonding in water is hydrogen bonding.  This is a bonding that takes place between the oxygen atom and a hydrogen atom of the next water molecule.

This makes the water molecule an interesting molecule.

Answer:

Weight of the dog on surface of earth is 140.14 Newton.

Given:

mass of the dog = 14.3 kg

To find:

Weight of the dog = ?

Formula used:

Weight of the dog is given by,

W = mg

Where, W = weight of the dog

m = mass of the dog

g = acceleration due to gravity

Solution:

Weight of the dog is given by,

W = mg

Where, W = weight of the dog

m = mass of the dog = 14.3 kg

g = acceleration due to gravity

W = 14.3 × 9.8

W = 140.14 Newton

Weight of the dog on surface of earth is 140.14 Newton.

The dog weight on Earth is 140.14 N.

To calculate the weight of an object on Earth, we use the formula:

Weight (N) = Mass (kg) × Gravitational Acceleration (m/s²)

On Earth, the gravitational acceleration is approximately 9.8 m/s². Given that the mass of the dog is 14.3 kg, we can find its weight as follows:

Now, multiplying these values:

Weight = 14.3 kg × 9.8 m/s² = 140.14 N

Therefore, the dog's weight on Earth is 140.14 Newtons (N).

'6' is the angle of incidence.

'7' is the angle of reflection.

The right option is (C).

The potassium-40 is the isotope of potassium which has the half-life of 1.251×109 years to reduce its half quantity. There are rare elements present on earth which follow the two type of beta decay. Potassium-40 is one of them which can decay as beta decay to convert into Ca-40 or electron capture decay to convert into the Ar-40. In this second decay, they also emit gamma rays. So, the right option is (C) which wrong regarding the transmutation.

In the examples given, the transmutation process either involves the emission of particles or the bombardment with neutrons, which leads to a change in the atomic number and transforms the element into a different one. The exception is option C) where Potassium-38's release of a beta particle results in its transformation into Argon-40, not Argon-38 as stated.

Transmutation in chemistry refers to the process wherein an atom of one element is changed into an atom of another element through a nuclear reaction. Of the options provided: A) Uranium-238 emitting an alpha particle to form Thorium-234, B) Uranium-238 being bombarded with a neutron to produce Uranium-239, and D) Plutonium-239 bombarded with two neutrons to produce Americium-241 and a beta particle, are all examples of transmutations. These include the emission of particles or bombardment with neutrons leading to change in the atomic number and forming a different element. However, option C) Potassium-38 releasing a beta particle to form Argon-38 is not an example of a transmutation. In this case, Potassium-38 release of a beta particle results in a change in atomic number from 19 to 18, transforming into Argon-40, not Argon-38 as stated.

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Sound waves  are a change of pressure that moves through matter. (C)

Mass is the amount of matter that an object contains. Don't understand the question.. 100 grams of something is an amount of matter with a mass of 100 grams. I'm guessing composition

It's the old-but-important concept:  "Speed" depends on who's measuring it and how THEY're moving.  Different observers may very well observe different speeds, and they're all correct.  There's no such thing as "the REAL speed".

When you were a little kid, did you ever get on a moving escalator or walkway, and when you got to the middle, you turned around and walked the opposite way, so that somebody watching you from the outside would see you not moving at all ?

Say you're on a school bus that's driving 10 mph along the street pavement, and you get up out of your seat and run forward up the aisle at 10 mph.  Somebody outside the bus sees you passing them at 20 mph !

If instead, you run toward the BACK of the bus at 10 mph, somebody outside the bus sees you bobbing up and down but not moving forward or backward at all.

All this  problem is saying is:  The bus is driving along at 15 m/s.  A passenger on the bus puts his little baseball down on the floor on its little feet, and it runs backwards down the aisle, toward the back of the bus, at 15 m/s.  Somebody is standing outside looking into the bus as it passes by and the little baseball is scurrying toward the back of the bus.  How will HE describe the motion of the baseball ?    

Have you got it now ?

"Relative to the Earth" just  means how fast an object is passing the stores and telephone poles and people standing still ... things that are attached to the Earth.  "Relative to the bus" would mean how fast an object is passing by people sitting on the bus.

depends on the speed limit

the same speed. its only sneezing.

Answer: motion energy : energy related to an object’s movement

thermal energy : energy of motion of particles in a substance  

gravitational potential energy :  energy related to height

chemical energy :stored energy related to positions of atoms within molecules

nuclear energy : energy released when a nucleus splits or combines

sound energy : energy generated by vibration of a string

Explanation: Motion energy is also called as kinetic energy and it is defined as the energy possessed by an object due to its motion.

Thermal energy is the measure of total kinetic energy of the particles in a substance. The greater the motion of particles, the higher is the temperature of the substance and thermal energy.

Potential energy is defined as the energy possessed by an object due to its position or height.

Chemical energy is the energy stored in the bonds of the molecules.

Nuclear energy is the energy possessed in the form of binding energy which held the protons and neutrons together in the nucleus.

Sound energy is  the energy possessed by an object by virtue of vibration of matter.

Answer:

The answers are:

Stored energy related to positions of atoms within molecules: Chemical energy

Energy released when a nucleus splits or combines: Nuclear energy

Energy related to an object’s movement: Motion energy

Energy related to height: gravitational Potential energy

Energy generated by  vibration of a string: Sound energy

Energy of motion of particles in a substance: Thermal energy

Explanation:

I took the test and got this question right.

Zero latitude gets the most direct sun all year around. That's the equator.

The picture you attached has nothing to do with this question.

The Equator (0 degrees latitude) receives the most direct rays of the sun year-round due to being at the midpoint of the Earth's surface. As we move towards poles, the sunlight becomes less direct.

The latitude that receives the most direct rays of the sun year-round is 0 degrees, also known as the Equator. The rays of the sun hit the equator directly because it is the midpoint of the Earth's surface. As you move away from the Equator, either towards the North or South Pole (which are 90 degrees latitude), the sun's rays hit the Earth's surface at increasingly oblique angles, resulting in less direct sunlight. Hence, options B, C, and D (30 degrees, 60 degrees, 90 degrees respectively) receive less direct sunlight compared to the Equator (0 degrees).

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(45 km/hour west) · (0.5 hour) =

(45 · 0.5) · (km · hour west/hour) =

22.5 km west

The friction force is equal to 120 N. This is based on Newton's First Law. The friction force balances the pushing force, thus keeping the box stationary.

When you push on a large box with 120 N of force and it does not move, it means that the friction force opposing your push is equal to the pushing force. This is based on Newton's First Law of Motion which states that an object in motion tends to stay in motion and an object at rest tends to stay at rest unless acted upon by an unbalanced external force. Friction is the resisting force that occurs between two surfaces in contact when one or both of the surfaces are moved or attempt to move. In this case, the friction force is 120 N because it precisely offsets the applied force, keeping the box stationary.

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Any object which is in state or rest is made to change its by applying the external force. An object is made to move or stay still due to its inertia.

Mass is the measure of inertia . Greater the mass, greater will be the inertia.

Inertia is the opposition caused to the motion of an object whether it is still or moving. It is a tendency to do nothing or remain unchanged.

Hence, Inertia causes an object to move or stay still.

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Objects move or stay still based on Newton's first law of motion or the law of inertia, which states that an object will continue its current state of rest or constant motion unless an external force acts upon it.

What causes objects to move or stay still can be explained by Newton's first law of motion, also known as the law of inertia. This law states that every object will continue to be in a state of rest or move at a constant speed in a straight line unless it is compelled to change by an outside force. For example, if you slide a book on a table, it eventually stops because of the friction (an outside force) between the book and the table.

Similarly, an object moving in an elliptical path, such as a planet, must be subjected to a constant force that keeps changing its direction. Newton proposed this force to be gravity. So, if you throw a ball (a small scale example), it eventually drops to the ground because of the gravitational pull of the earth.

Therefore, without an external force, a stationary object stays put, and a moving object keeps moving at the same speed and in the same direction.

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