I need help please; I'll mark you brainliest​

I Need Help Please; I'll Mark You Brainliest

Answers

Answer 1

Answer:

Its number 1.

Explanation:

Speed, being a scalar quantity, is the rate at which an object covers distance. The average speed is the distance (a scalar quantity) per time ratio. ... Velocity is the rate at which the position changes. The average velocity is the displacement or position change (a vector quantity) per time ratio.

Answer 2

Answer:

It’s both I and II

Explanation:

Speed refers to how fast something goes by using the equation distance/time. So it only uses distance and time.

On the other hand velocity is basically speed, so it uses distance/time, but the only difference is velocity uses direction.


Related Questions

A tall tree has more chance to break during the storm, why?​

Answers

because the top part become weaker

Explanation:

Unfortunately, all trees have some potential to fail during heavy winds or other harsh elements, such as snow and ice. ... In these incidences, the tree trunk acts as a lever and the force applied to the roots and trunk increases with height and mass. Taller trees are more susceptible to windthrow.

"Windthrow" is a phenomenon that uproots a tree because the trunk acts as a lever applying force to the roots. ... Trees are more likely to uproot during strong winds especially if the tree is top-heavy which can also result in tearing, splitting and limb breakage

which are considered noble gases

Answers

Answer:Argon

Neon

Helium

Krypton

Xenon

Any of the seven chemical elements that make up Group 18 (VIIIa) of the periodic table. The elements are helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), radon (Rn), and oganesson (Og)

Hope this helps! Have a great day :)

Connie flew from Phoenix to flagstaff, a distance of 180 miles at a constant speed of 180 miles per hour. She then returned to the same airport at a stand speed of 90. Miles per hour. What was Connie average speed in miles/ hour

Answers

Answer:

120 miles/hour

Explanation:

The average speed is the ratio of total distance covered by an object or a body to the total time taken to cover the distance.

Mathematically,

    Average speed = total distance covered/total time taken

In the case of Connie:

total distance = 180 + 180 = 360 miles

In order to calculate the time for each trip

speed = distance/time

  time = distance/speed

From Phoenix to flagstaff:

  time = 180/180 = 1 hour

From flagstaff back to Phoenix:

  time = 180/90 = 2 hours

total time taken = 1 + 2 = 3 hours

Average speed = 360/3 = 120 miles/hour

Hence, the average speed is 120 miles per hour.

what type of energy is mowing a lawn ? quick pleaseeeeeeeeeeeeeeeeeeeee

Answers

Answer:

Movement is mechanical energy. When someone drives a car or runs a gas powered lawn mower, the gasoline burns in the engine. The engine transforms the chemical energy of the burning gasoline into mechanical energy to move the car or mower.

From: Sciencetimego.com

Answer:

mechanical energy

Explanation:

Which two actions could you take to weaken an electromagnet?
A. Use a wooden core instead of a steel core.
B. Replace a 9 V battery with a 3 V battery.
O C. Decrease the length of the connecting wires in the circuit.
D. Increase the number of wraps of wire around the core.
E. Include an ammeter in the circuit.

Answers

Answer:

a and b

Explanation:

first one breaks it and second one directly makes it weaker

Answer:

A and B

Explanation:

took the test

at the instant shown in the diagram, the car's centripetal acceleration is directed

Answers

Answer:

At the instant shown in the diagram, the car's centripetal acceleration is directed is discussed below in detail.

Explanation:

The direction of the centripetal acceleration is in a circular movement is forever towards the middle of the roundabout pathway. In the picture displayed, the East direction is approaching the center. So, the course of the car's centripetal acceleration is (H) toward the east.

A net force of 12.0 N causes an object to increase its speed from 15.0 m/s to 18.0 m/s during a 2.0 second interval. What is the mass of the object?

Answers

Answer:

Mass of object = 8kg

Explanation:

Since a= change in v/ change in t, a= (18-16)/2

= 1.5

And F=ma Force =12a= 1.5m=?

You can now solve for your unknown value of mass.

A net force of 12.0 N causes an object to increase its speed from 15.0 m/s to 18.0 m/s during a 2.0 second interval. The mass of the given object 8 Kg.

What is force?

A force is an effect that can alter an object's motion according to physics. An object with mass can change its velocity, or accelerate, as a result of a force. An obvious way to describe force is as a push or a pull. A force is a vector quantity since it has both magnitude and direction.

Since a = change in v/ change in t,

a = (18-16)/2

a = 1.5

Force, f = ma

mass, m = F/a

          m = 12/1.5

          m = 8 Kg.    

                     

A net force of 12.0 N causes an object to increase its speed from 15.0 m/s to 18.0 m/s during a 2.0 second interval. The mass of the given object 8 Kg.

To learn more about force refer to the link:

brainly.com/question/13191643

#SPJ2

What happens whenever energy is transformed from one form to another?

Answers

Answer:

Energy transformation is when energy changes from one form to another – like in a hydroelectric dam that transforms the kinetic energy of water into electrical energy. While energy can be transferred or transformed, the total amount of energy does not change – this is called energy conservation.

Explanation:

Hope This Helps!!

God Bless!!

~DuffyDuck~

How massive is a frisbee if it accelerates at 12 m/s/s when a force of 6 newtons is applied to it?

Answers

F=ma
M=f/a
M=6/12
M=0.5 kg

What is the Nervous System made up of?

Answers

Answer:

Hope this helps you mate.

Explanation:

Nervous system consists of brain,spinal cord and nerves.

Help please 20 points ? ASAP

Answers

Answer:

21: Mass

22: Unbalanced Force

23: Friction

24: Balanced

Explanation:

Which of the following statements best describes an electromagnetic wave with a short wavelength?
A.)It has a low frequency and can travel in a vacuum (space)
B.)It has a high frequency and can travel in a vacuum (space
C.)It has a low frequency and can only travel in a medium
D.)It has a high frequency and can only travel in a medium

Answers

it’s probably d or b

Electromagnetic wave has a high frequency and can travel in a vacuum or space.

It has a high frequency and can travel in a vacuum or space is the statement which best describes an electromagnetic wave having shorter wavelength because electromagnetic waves having shorter wavelength has high frequency and it can propagate through space means need no medium for propagation.

The transmission of electromagnetic waves does not require a medium and they are able to travel through vacuums or space. Ultraviolet light, X-rays, and gamma rays are the examples of electromagnetic waves so we can conclude that electromagnetic waves having shorter wavelength has high frequency and it can propagate through space.

Learn more: https://brainly.com/question/19354446

if i want an thrilling job witch should i chose im stuck beetween,
1. horse rider
2. drawer
3. photographer

Answers

Answer:

horse rider

Explanation:

it will help in the future  and its fun

Which best explains why the shape of a liquid can change? (1 point) a The particles have just enough energy to move past each other. b The particles are charged. c The particles move at very high speeds at all times. d The particles are highly compressible.

Answers

Answer:

The particles have just enough energy to move past each other.

Answer:

A

Explanation:

Solid's particles cannot move past each other and are stuck in place. Liquid's particles are able to slightly move past each other. And gas's particles move freely.

Hope this helps!

30 POINTS PLS ANSWERRRR
For each of Newton’s three laws of motion, compare hitting a 500-g croquet ball with a mallet to hitting a 56-g tennis ball with the same mallet and the same amount of force.

Answers

Answer:The croquet ball velocity v will be 56/500 the tennis ball velocity V after the impulse.

The second law (force = mass*acceleration) says that the same force will accelerate the balls by the inverse of their mass. That is, the force will continuously change the momentum:

f = 500a = 56A

Therefore a = f/500 and A = f/56

and a/A = 56/500.

The croquet ball will accelerate less, for whatever time or distance you apply the force.

The third law: for every action, there is an equal and opposite reaction. So, if in fact you apply the same force to strike each ball, you will feel the same reaction. That’s probably easier to do for a quick strike (the impulse case above) than for a long, smooth acceleration over distance, because the balls have very different elastic response. The body can tell how equally you applied force!

Explanation:

Why does the law of conservation of energy limits the efficiency of any machine.

Answers

Answer: Because machines cannot create new energy themselves, they merely change its direction, its form, the amount applied, or the distance it is applied over. Therefore, although it may seem like machines make things easier, in reality they just convert one form of energy into another, and cannot multiply energy or work.

Explanation:

6. A sled traveling at a speed of 3.0 m/s slows to a stop 4.0 m from the point where
its passenger rolled off. What is the magnitude of the horizontal net force that
slows the 110 N sled? (Assume ag = 10m/s2)
D​

Answers

Answer:

-12.38 N

Explanation:

This question requires you to first find the acceleration then apply Newton's 2nd law of motion to find the force.

To find deceleration use the formula;

v²= u²+2ad ---where

v= final speed = 0 m/s

u= initial speed = 3.0 m/s

a= acceleration { in this case , deceleration} = ?

d= distance from the point where its passenger rolled off= 4.0 m

therefore ;

[tex]a=\frac{v^2-u^2}{2d}[/tex]

[tex]a=\frac{0^2-3^2}{2*4} =\frac{-9}{8} m/s^2[/tex]

Mass of the sled is calculated from its weight force.

Weight force = mg

mass of sled = weight force / g  where g= 10 m/s²

mass of sled = 110/10 = 11kg

The magnitude of horizontal net force will be : F= ma  where ;

m= mass of sled = 11 kg

a= deceleration = -9/8 m/s²

F = 11 * -9/8 = -12.38 N

Force is acting on the opposite direction of the initial motion of the sled.

The magnitude of the horizontal net force acting on the sled is 12.375 N.

Given data:

The initial speed of sled is, u = 3.0 m/s.

The final speed of sled is, v = 0 m/s.

The distance covered before stopping is, s = 4.0 m.

The weight of sled is, W = 110 N.

Using the Newton's second law, the net horizontal force acting on the sled is given as,

F = ma

here,

m is the mass of sled.

a is the acceleration of sled.

Mass is calculated from the weight as,

W = mg

110 = m (10)

m = 11 kg.

Now, using the second kinematic equation of motion to obtain the acceleration of sled as,

[tex]v^{2}=u^{2}+2(-a)s\\\\0^{2}=3^{2}+2(-a)4\\\\8a=9\\\\a=1.125 \;\rm m/s^{2}[/tex]

Then the magnitude of net horizontal force is,

[tex]F = ma\\\\F = 11 \times 1.125\\\\F = 12.375\;\rm N[/tex]

Thus, we can conclude that the magnitude of the horizontal net force is 12.375 N.

Learn more about the Newton's second law here:

https://brainly.com/question/19860811

What is KBr (periodic table) def

Answers

Answer: Answered already

Explanation:

Set-up: Set initial speed at 15 m/s. Set the height of the cannon to 0 meters. Be sure that air resistance is NOT checked.
B. 2. Our independent variable in this simulation will be the launch angle. Keeping the speed at 15 m/s, vary the launch angle as indicated in the table below. Drag the crosshairs marked with time and range to the spot where the object landed. Then drag the crosshairs to the top of the parabola to find max height. Fill in the table below with the values.

Answers

Answer:

tatti kha le

Explanation:

What is the distance a shark can cover while swimming at a speed of 15.25 m/s for 18 seconds?

Answers

Answer:

274.5

Explanation:

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This means you will complete all work in a word processing document (e.g. Microsoft Word) and attach the file using the Submit Text Step 1: Find Some Physical ArtStart by thinking about all the places in your home, school, town, and general vicinity that you might come across physical art. Maybe there are various sculptures lining the streets in your town or perhaps there is a local museum that you enjoy visiting to admire the physical art. Or maybe you have various works of physical art right in your own home!Start exploring the physical art around you and choose a piece of physical art that you will use as inspiration for your digital art creation. Visit this piece of physical art with your camera in hand and take as many photographs as you possibly can from all angles and directions. You may even find it useful to bring a small notepad to jot down any observations that you make while viewing this art in person so it remains fresh in your memory.After you have fully locked all the details of this physical art piece into your mind (and into your camera/camera phone), you are ready to move on to the next step!Step 2: Research Software OptionsTake some time to explore online and learn about the various ways that digital art is created. What types of programs are used? Are there free websites or apps that might be helpful? What skills or tools will you need to call upon to create this digital art masterpiece?Make a list of the possible software tools and options that you find in your research that are available to help you create your digital art piece. Identify the program(s) or tool(s) that you plan to use for this lab.Step 3: Make a PlanNext, map out a loose plan for your digital art. This can be as simple as typing up some notes in a word processing document using bullet points to create a plan of action for how you will approach this digital creation.Some questions to consider:How will you capture the essence of the physical art digitally?What are some key aspects that you need to pay attention to?What components of the physical art are you apprehensive to re-create digitally?Are there any aspects of the physical art that you want to change when you re-create it digitally?It is important to note that while you should be able to recognize and see the resemblance between the physical art piece that you choose and your digital re-creation, you do have some creative ownership in this processafter all, youre the artist! That means that you have the creative freedom to shift or slightly change some aspects of the physical art that you want to while re-creating it digitally in order to truly make it your own!After exploring the possible programs or tools available to you to create your digital art and mapping out a plan, it is time to get started!Step 4: Create!Using whatever program or tools you decided on, jump right in to re-creating your physical piece of art in a digital medium.While you are creating your digital art, keep in mind that you will be submitting the photos of your physical piece of art along with your digital re-creation, and the resemblance should be evident. It is certainly okay for various details to be different based on your creative ideas and instincts, but make sure that the most defining and dominant features of the original piece of physical art are evident in your digital re-creation.Step 5: ReflectThe final piece in this lab is to compose a brief reflection/explanation of your digital re-creation. 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