A woman standing on the ground watches an airplane fly by a mountain on a clear summer day. Her reference point for the moving plane would be:

a. There is no reference point
b. The ground
c. The mountain
d. A person in the plane

Answers

Answer 1
D I THINK Hope I helped hav ea good day anjajsgbsnsba

Related Questions

hello! Someone please help me with this.

Answers

Explanation:

VT= 10 v

IT = V/R = 10/5= 2 A

RT= 5 ohm

PT = 20w

[tex] {i}^{2} \times r = {2}^{2} \times 5 = 20watts[/tex]

The particles of a substance can have kinetic energy (KE) and potential energy (PE). Which equation best summarizes the internal energy (U) of the substance?​

Answers

Answer:

The internal energy of a substance is equal to the total amount of potential energy and kinetic energy of ALL the particles in the substance.

For example, when the temperature increases (more temperature means more energy), the kinetic energy of the particles in the substance increases.

And when we reach a point near a change of phase (like near fusion point) there is energy used to break the bonds between the particles, then we have an increase in potential energy.

Then we could write the internal energy as:

U = ∑(KEₙ) + ∑(PEₙ)

Where ∑(KEₙ) and ∑(PEₙ) are the sums of the kinetic energy and potential energy of all the particles in the substance.

The equation that best summarizes the internal energy (U) of a substance that has both kinetic and potential energy is U = ∑(KEₙ) + ∑(PEₙ).

WHAT IS INTERNAL ENERGY:The internal energy of a substance is equal to the total amount of potential energy and kinetic energy of all the particles in the substance.

According to this question, the particles of a substance can have kinetic energy (KE) and potential energy (PE).

This means that the internal energy is the sum of the kinetic energy and potential energy of all the particles in the substance.

Therefore, equation that best summarizes the internal energy (U) of a substance that has both kinetic and potential energy is U = ∑(KEₙ) + ∑(PEₙ).

Learn more about internal energy at: https://brainly.com/question/11278589

Surfactants, or wetting agents, are chemicals that are used in detergents. These chemicals interfere with hydrogen bonding between water molecules to allow water to more easily penetrate the small spaces between the fibers in cloth.


If an accident released these substances into a pond, what danger would they most likely pose to living things in the pond?


A)The water in the pond would warm and cool more easily.

B)Plants on the bottom of the lake would die because ice would sink.

C)Insects would have trouble walking on the water.

D)The water would be able to dissolve fewer nutrients.

Answers

Answer:

D)  Insects would have trouble walking on the water.

Explanation:

If you go to Mars would you be heavier or lighter

Answers

Answer:

I mean you could just look it up... but here the answer for you ,so you know it's right...

Explanation:

:)

when a chemical reaction occurs, chemical bonds ______ break and new chemical bonds form to create the __________

Answers

Answer:

a) reactant

b) product

Explanation:

During a chemical reaction, the reactants interact among themselves in a specific temperature, pressure, pH, enzyme etc. Due to various intra and inter molecular and atomic interactions, the chemical bonds in the reactants break down. Formation of new chemical product is governed by the formation of new bond (ionic, covalent, hydrogen vander waal etc. )

Go to your backyard or to your high school’s basketball court or tennis court and try out this experiment to see if you can predict motion and inertia accurately. Bring a friend or classmate. Take along a ball.

Select two spots roughly 10 meters apart. Mark each of them clearly. The first spot will be the starting point and the second will be the target.
Ask a friend to run as fast as possible (sprint) carrying the ball from the starting point to the target. Have your friend release the ball when he or she is immediately over the target trying NOT to swing arms when dropping the ball.
Record the results in the table below.
Repeat the sprint at least five times. Record where the ball lands each time.
Next, ask your friend to jog to the target with the ball and drop it. In the table, again record where the ball lands. Do two trials.
For the final test, ask your friend to walk to the target and drop the ball. Also record these results in the table. Do two trials

Answers

Answer:1 Sprint 54 cm Beyond

2 Sprint 41 cm Beyond

3 Sprint 68 cm Beyond

4 Sprint 32 cm Beyond

5 Sprint 44 cm Beyond

6 Jog   31 cm Beyond

7 Jog         22 cm Beyond

8 Walk 17 cm Beyond and left

9 Walk 6 cm Beyond

Explanation:

Answer:

1 Sprint 54 cm Beyond

2 Sprint 41 cm Beyond

3 Sprint 68 cm Beyond

4 Sprint 32 cm Beyond

5 Sprint 44 cm Beyond

6 Jog 31 cm Beyond

7 Jog 22 cm Beyond

8 Walk 17 cm Beyond and left

9 Walk 6 cm Beyond

Explanation: edmentum sample answer

___is the process that exchanges gases between body and the outside air.

Answers

Answer:

Breathing.

Explanation:

Breathing is the process that exchanges gases between body and the outside air.

of the following states of motion, the one which requires balanced forces is:
A: a decrease in speed in a straight line
B: an increase in speed in a straight line
C: constant speed in a straight line
D: a change in the direction of the motion

Answers

I believe it would be D a change in direction of motion

A balanced force is required for a change in the direction of the motion.

What is a force?

According to Newton's second law of motion, the force applied to a body is directly proportional to the product of mass and acceleration of the body.

Balanced forces

Balanced forces are those that are opposite in direction and equal in size. When forces are balanced there is no change in direction.

Thus, when there is change in direction, a balance force can be applied to cancel the change in direction of motion.

Learn more about balanced forces here: https://brainly.com/question/485828

please help! this is timed!

Answers

Answer:

convection because it's not a conductor nor does it have radiation.

Equation of motion description is v=20+2t.How big is the initial speed,acceleration?

Answers

Answer:

the initial velocity is 20 m/s   and  the acceleration is 2 m/s²

Explanation:

Given equation of motion, v = 20 + 2t

If V represents the final velocity of the object, then the initial velocity and acceleration of the object is calculated as follows;

From first kinematic equation;

v = u + at

where;

v is the final velocity

u is the initial velocity

a is the acceleration

t is time of motion

If we compare  (v = u + at)   to     (v = 20 + 2t)

then, u = 20    and  

         a = 2

Therefore, the initial velocity is 20 m/s   and  the acceleration is 2 m/s²

A 40kg box of junk food is being pushed along a wooden floor with a force of 100N. If the coefficient of friction is 0.2, what will be the acceleration of the box? Remember to show the equation you are using, then substitutions, then final answer.

Answers

Is there a picture to go with this?

_____________________ show how many atoms of each element are in the compound.

Answers

Answer:

2 or more

Explanation:

yes yes yes yes yes yes yes

A pendulum bob swings along its characteristic arc as shown. Rank the gravitational potential energy of the pendulum bob at the three marked locations

Answers

Answer:

Gravitational potential energy is the maximum at point C and lowest at point A

Explanation:

The image for the question is provide in the attached file

The energy of pendulum is governed by mechanical energy. Mechanical energy is the sum of potential energy and kinetic energy

Potential energy increases with increasing height. Thus, when the pendulum bob is at maximum height, then its potential energy is also the highest.

Thus, At point C, the gravitational potential energy is the highest

At point A, the  gravitational potential energy  is substantial but lower than that of gravitational potential energy at point C

AT point A, gravitational energy is the lowest

A rock is lifted by a machine to a height of 10m. If it has a mass of 22 kilograms

Answers

Answer:

2156J

Explanation:

Given parameters:

Height of lift  = 10m

Mass  = 22kg

Unknown:

Work done by the machine  = ?

Solution:

Work done is the force applied to move a body through a certain distance.

So;

        Work done  = Force x distance

Here;

       Work done  = mass x acceleration due to gravity x height

      Work done  = 22 x 9.8 x 10  = 2156J

Explain the motion of a car as the wheels spin

Answers

I'm a bit late, but here's an answer

The motion of a car and the wheel is kinda interesting, actually. If the wheel is turned right, the wheels will turn right. If it's left, the wheels will go left, you get the idea. The car will move that direction if it's in motion, though.

Answer:

In space, rockets zoom around with no air to push against. ... Rockets and engines in space behave according to Isaac Newton's third law of motion: Every action produces an equal and opposite reaction. When a rocket shoots fuel out one end, this propels the rocket forward — no air is required.

Explanation:

:p

- 0utc8st

HELP PLS MARKING BRANLIST 100 Pts TAKING TEST RN


A train moved at a constant speed of 63 m/s. How far will it travel in 120 seconds?

1.90 m

0.50 m


57 m

7.560 m

Answers

Answer:

It will travel 7,560 m

Explanation:

63 x 120 = 7,560 m

Answer:

A. 1.90

I divided 63 by 60 and got 1.05

I multiplied 1.05 by 2 (120 seconds = 2 minutes) and I got 2.1

1.90 is the closest answer.

A 55-kg box rests on a horizontal surface. The coefficient of static friction between the box and the surface is 0.30. A 140-N force is applied to the box. What is the frictional force on the box?

Answers

Answer:

161.7N

Explanation:

Given parameters:

Mass of the box  = 55kg

Coefficient of friction  = 0.3

Applied force  = 140N

Unknown:

Frictional force on the box = ?

Solution:

The frictional force on the box is a force that opposes the motion of the box.

To find the value of this force;

        Fr  = u m g

u is the coefficient of static friction

m is the mass

g is the acceleration due to gravity

 So;

     Fr  = 0.3 x 55 x 9.8  = 161.7N

Which is a disadvantage of storing data digitally?
A.The parts of devices that store data are unstable compared to analog storage.
B. Other people can access personal data when a virus is copied with the data.
C. Noise makes digital data unreliable when copied.
D. The quality of copies stays the same as more copies are made.

Answers

Answer:

I thinks it’s b sorry if it didn’t help

Explanation:

One of the disadvantage of storing data digitally  is that,  other people can access personal data when a virus is copied with the data. Hence, security of data cannot be ensured.

What is digital storing?

Nowadays there are many technological ways to store our credentials and essential documents. These data can be stored in virtual space such as in computers phones like electronic gadgets.

Compared to the conventional storage methods or paper format, digital storage is easy and fast easily accessible from anywhere in any format and can be shared. These data cannot damaged as paper document.

However, the digital storing have some drawbacks. Sometimes these data goes insecure and other people can access personal data when a virus is copied with the data.

Find more on digital storage:

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Give an example of speed making a difference in the amount of kinetic energy. Tell how you know that kinetic energy amount is different in your example.

Please help this is due today

Answers

Answer:

1. A car moving 40 mph has four times as much kinetic energy as one moving 20 mph, while at 60 mph a car carries nine times as much kinetic energy as at 20 mph. Thus a modest increase in speed can cause a large increase in kinetic energy.

PLZ MARK BRAINLIEST THANK AND FIVE STAR:)

Answer:

a car moving 40mph has four times as much kinetic energy as one moving 20 mph, while at 60 mph a car carries nine times as much kinetic energy as at 20 mph.

if you need any more info just dm me

A tire rotates 50 times in 2.5 seconds what is its period?​

Answers

Answer:

0.05s

Explanation:

Given parameters:

Number of rotations  = 50times

Time taken  = 2.5s

Unknown:

Period  = ?

Solution:

The period is the time taken for a body to make one complete rotation. It is mathematically expressed as;

     Period  = [tex]\frac{time taken}{number of rotation}[/tex]  

    Period = [tex]\frac{2.5}{50}[/tex]    = 0.05s

Mass is 56.8 g and the volume is 10 mL what is the density

Answers

Answer: 5.68g/ML.

Explanation; Divide the mass of the unknown substance and the volume of the unknown substance and you will have your answer.

Hope this helps! ^^ if you can pls mark me brainiest!

HELP PLS 100 POINTS TAKING TEST RN


Suppose you are in a car that is going around a curve. The speedometer reads a constant 30
miles per hour. Which of the following is NOT true?

You and the car are accelerating.

Your speed is constant.

Your velocity is constant.

Your acceleration is constant.

Answers

Answer:

sorry I hate when people press your question and answer with a fake answer for points, however you said it was 100 points and it's not even close lol but it is "your speed Is constant" that is not true

answers please and thank you​

Answers

Answer:

W

Explanation:

its high in mass object and volume object

Which step(s) of the greenhouse effect are being most affected by the increases in greenhouse gases, leading to an increase in heat?

1. Solar radiation enters the Earth system and is reflected and absorbed.
2. Absorbed energy is released into the atmosphere as heat.
3. Heat is absorbed by the atmosphere.
4. The atmosphere re-releases heat, warming Earth’s surface and lower atmosphere.

Answers

Answer:

1, 2, and 3

Explanation:

The heat of the solar radiation is absorbed by the atmosphere then the atmosphere re-releases heat, warming Earth’s surface and lower atmosphere. Therefore, option (3), (4) are correct.

What is the greenhouse effect?

The greenhouse effect can be described as a process that happens when energy heats the planet's surface, but greenhouse gases in the atmosphere stop some of the heat from returning directly to space and warm the planet.

The natural greenhouse effect keeps the earth from having the below-freezing temperature that it would freeze if there were no greenhouse gases. Additionally, human activities increase greenhouse gases and trap greater amounts of heat, which cause the Earth to grow warmer over time.

The Sun sends most of its energy as visible and near-infrared light, while Earth's average surface temperature emits longer-wavelength infrared, radiant heat. These greenhouse gases emit radiant heat in all directions, passing heat to the air and warming other greenhouse gases.

Learn more about the greenhouse effect, here:

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An elephant kicks a 2.5 kg rock that is initially at rest. The

net force on the rock varies with time as shown below.

What is the rock's change in momentum between 0 ms

and 20 ms?

Answers

0.20Answer:

Explanation:


A freely falling object is dropped from rest, what is its speed after falling 1 second? 2 seconds? 3 seconds? 10 seconds?

Answers

Answer:

You can use the formula: X= Vinitial.t + [tex]\frac{1}{2}[/tex] g[tex]t^{2}[/tex]

where: X: distance, which the question wants.

V initial = Zero

t= 1,2,3,10 sec.

g: is the acceleration due to gravity = 9.8 m/[tex]s^{2}[/tex]

A car moving on a straight level road changes its speed from 3.5m/s to 4.5m/s in 5.00 seconds. Find it’s acceleration

Answers

Answer:

0.2m/s2

Explanation:

acceleration= change in velocity ( in this case speed)/ change in time.

4.5-3.5=1m/s

change in time=5-0 =5

1m/s divided by 5 seconds acceleration as the result

A squirrel starts at rest and accelerates at 2.3 m/s^2 for 5.22 seconds. What is it's final velocity?

Please provide the variable, number, and unit e.g., a= 1.34 m/s^2

Answers

Answer:

12.259 m/s

Explanation:

An object starting at rest and accelerating at a constant acceleration a for t seconds has a velocity of

[tex]v=at[/tex]

If we substitute in the values a = 2.3 m/s² and t = 5.22 s, we get a velocity of

[tex]2.3(5.22)=12.259[/tex] m/s

The force of attraction that holds two atoms together within a molecule is

Answers

Answer: Chemical bond

Explanation:  This force is of an electric nature, and the attraction between electrons of one atom to the nucleus of another atom contributes to what is known as chemical bonds.

The time for a sound wave to travel between two people is 0.80 s,
The people are 256 m apart
Calculate the speed of sound in air.

Answers

Answer:

Explanation:

Using the below formula

Speed of sound = ( distance between observers) *2/(total time taken)

Now putt the given values ,

time taken = 0.80 sec

distance = 256 m

hence

V of sound= 256*2/0.80

V of sound = 640 m/sec

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