Physics High School

Which best describes friction? A. a downward pull when objects fall through the air B. a constant force that acts on objects that rub together C. a downward pull on objects that roll on bumpy surfaces D. a constant force that pulls two objects toward each other
PLSSS I NEED HELP 20 POINTS!!!

Answers

Answer 1

Answer:

i believe its B

Explanation:

im taking physics and thats the only thing that makes sense to me haha

hope this is right and helps <3

Answer 2

Answer:

It's B: a constant force that acts on objects that rub together

Explanation:

Which Best Describes Friction? A. A Downward Pull When Objects Fall Through The Air B. A Constant Force

Related Questions

Describe a ways car manufacturers try to reduce drag and why.

Answers

Aerodynamic drag can be reduced by altering the density of the air and the vehicle speed, but these factors are not easily controlled. Instead, to reduce drag, car manufacturers can make the height and width of the front of the car smaller. ... This shape reduces drag and the forces that try to propel the car backwards

Aerodynamics is a way to reduce drag that uses car manufacturers.

What is aerodynamic ?

Aerodynamics is the motion of the air. airplane flies cause of aerodynamics.

Aerodynamics is the study of forces that are resulted by motion of the air.

To reduce the aerodynamic drag further, the manufacturers use character lines on the exteriors of the car's body right from its concept stage. These lines help the air to pass smoothly over the body and thus, reducing the air resistance.

cars have flat vertical face in front. When it moves through air, drag force directly proportional to the velocity applies on the car which opposes motion of the car. after studding aerodynamics when we make triangular like shape to the front body of the car, it cuts the air and front air goes from side of the car which reduces oppose to the motion, and car can have more speed.  

To know more about aerodynamic :

https://brainly.com/question/3800219

#SPJ3.


John and Susan find a penny, and Susan says, "I bet you can't tell me what is on the
penny". John thinks about it, and realizes he can't describe the penny. It appears that
John can't describe a penny because he never learned what one looked like in the
first place. John's inability to describe the penny is an example of
1) simply forgetting.
2) a failure to encode.
3) retroactive interference.
4) proactive interference.

Answers

Answer:

hey

Explanation:

hey

John and Susan find a penny, and Susan says, "I bet you can't tell me what is on the  penny". John's inability to describe the penny is an example of a failure to encode.

The ability to encode a piece of information is to be able to translate or explain the body of information at a later date or time. When John thinks about what is on the penny, he couldn't describe it because he never learned how to encode the information on the piece of the penny in the first place.

Retroactive interference is a process whereby fresh memories interfere with the recovery of old memories. This sort of interference has a retrograde impact rendering it more challenging to recall previously learned information.

On the other hand, proactive interference is a process whereby old memories interfere with the recovery of fresh new memories.

Therefore, we can conclude that since John has never learned what a penny looked like before, he doesn't have previous information about it. As such, the only correct option is (2)

Learn more about how to encode information here:

https://brainly.com/question/13963375?referrer=searchResults

The_____ of a substance is the temperature at which a solid begins to liquefy

Answers

Answer:

Melting point

Explanation:

when a solid turns to a liquid, it is melting

The melting point of a substance is the tempature at which a solid begins to liquefy

A dog walks 21 m north and then walks 35 m west to bury a bone. What is the displacement of the dog?

Answers

Answer:

40.8 m North West.

Explanation:

Please see attached photo for diagram.

In the attached photo, R represent the displacement of the dog.

The displacement (R) of the dog can obtained by using the pythagoras theory as illustrated below:

R² = 35² + 21²

R² = 1225 + 441

R² = 1666

Take the square root of both side.

R = √1666

R = 40.8 m North West.

Therefore, the displacement of the dog is 40.8 m North West.

The capitary action of water is caused the cohesion of water molecules to different types of molecules and the adhesion of water molecules with other water molecules true or false

Answers

yesssss brooooooooooo

what stresses you think of three things and describe what makes these situations stresssful how do they make you feel

Answers

Answer:

a lot stresses me out honestly like school work because we are virtual and it's hard cause you basically teaching yourself, secondly me maintaining to be happy i always put everybody's happiness before mine and it's just a lot for me, and lastly the thing that stresses me the most is me overthinking i ALWAYS overthink situations.

Explanation:

:/

write one general properties of non contact force​

Answers

Answer:    Gravitational force between the two masses does not depend on the medium separating two masses.

what is the property of medium

Answers

Answer:tension, density, temperature and elasticity

Explanation:

A water balloon is dropped from 196 meters above the surface of Earth, from an
airplane traveling at 98 m/s. What are the horizontal and vertical speeds of the balloon
when it hits the ground if it takes 6.3 seconds to drop to the surface of Earth?

Answers

Answerspeed = 0.0333333 meters per second

= 0.0333333 m/s

Explanation:

i'm not 100% sure but i think that's the answer

If I have 10 m 20 N how much work do I have

Answers

Answer:

200 joule

Explanation:

force= 20N

distance=10m

work= ?

we know,

work= force×distance

=20N×10m

=200Nm or joule.

Function of bones in the body?

Answers

Any of the pieces of hard whitish tissue making up the skeleton in humans and other vertebrates.

The calcified material of which bones consist

NEED HELP PLEASE. What are the reactions for the following?

Answers

Happy because he jumped off the bridge

Electron dot diagrams help you predict how an atom will bond with other atoms.

True or false?

Answers

true the answer is true

Why is speed a scaler quantity​

Answers

Answer:

Speed is a scalar quantity it is the rate of change in the distance travelled by an object, while velocity is a vector quantity  it is the speed of an object in a particular direction.

Cool down math
Which line has a slope of 1?

Answers

The line that goes up by 1 and right/left by 1. Hope this helps

please helpp meee write the analysis and then answer the next pic

Answers

25.) 5m
26.) during the second 5 seconds the object does not travel any distance
27.) the object travels 10 more meters reaching the 15m mark
28.) during the fourth 5 seconds the object does not travel any distance
29.) 15 meters backwards

What causes a gravitational field around an object?
density
mass
shape
volume

Answers

Answer:  It is mass

Explanation: It is caused by a bending of space-time.

Answer:

B - Mass

Explanation:

Edg

what are three effect of force​

Answers

Answer:

1. Can change the state of an object(rest to motion/ motion to rest)

2. May change the speed of an object if it is already moving.

3. May change the direction of motion of an object.

Explanation: A force acting on an object causes the object to change its shape or size, to start moving, to stop moving, to accelerate or decelerate.

The ___ of the element always start with capital letter.​

Answers

iekeiieurk384k3irkrurj484jr

Planets A and B have the same size, mass, and direction of travel, but planet
A is traveling through space at half the speed of planet B. Which statement
correctly explains the weight you would experience on each planet?
A. You would weigh the same on both planets because their masses
and the distance to their centers of gravity are the same.
B. You would weigh less on planet B because it is traveling twice as
fast as planet A.
C. You would weigh the same on both planets because your mass
would adjust depending on the planet's speed.
D. You would weigh more on planet B because it is traveling twice as
fast as planet A.

Answers

Answer: A

Explanation:

Answer:

A. You would weigh the same on both planets because their masses and the distance to their centers of gravity are the same.

Explanation:

A pe x :)

I’ve already figured out A. I just need help with B and C.

Answers

Answer:

595433.00

1456543.00

Explanation:

With the arrangement of colors of ROYGBIV, what is its arrangement based on its energy?

Answers

Answer:

red,orange,yellow,green,blue,indigo,violet

Explanation:

Answer:

Longest to shortest wavelength or Highest to lowest frequency

Which statement best describes the purpose of the vacuum inside a thermos?
A. It prevents particles from transferring thermal energy between the inner and outer bottles.
B. It increases heat loss through conduction between the outer and inner bottles.
C. It prevents heat loss through radiation, which requires matter to transfer energy.
D. It allows for more collisions between the particles that make up the outer and inner bottles.

Answers

Answer:

I think its a.

Explanation:

At lunch, the babysitter gives Tanya and Damien each a chocolate candy. Tanya puts her candy on her plate. Damien saves his candy in his pocket. After lunch, Damien discovers his candy has melted. Which statement accurately compares the atoms in the two candies?
The atoms in Damien’s candy have less energy.
The atoms in Damien’s candy are vibrating faster.
The atoms in Damien’s candy are unable to move.

Answers

The atoms in Damien’s candy are vibrating faster.

When the atoms in something are going at rapid speeds they create heat.

Answer:

The atoms in Damien’s candy are vibrating faster.

When the atoms in something are going at rapid speeds they create heat.

difference between acceleration and decceleration short notes​

Answers

Answer:

Acceleration is considered to describe an increase or positive change of speed or velocity. On the other hand, deceleration is considered to describe a decrease or negative change of speed or velocity.

o be useful in science, a hypothesis must be *
A. measurable
B. observable
C. testable
D. correct

Answers

Answer:

the answer is c testable

answer: C the hypothesis must be testable

1. Sally rides her bike to school which is 8.0 km from her house. If it takes 15 minutes for her
to reach her destination, what is her average speed in km/hr?

Answers

The answer could be 1.875?

erson jogs 3.5 kilometers in 35 minutes, then 1.5 kilometers in 20 minutes, and finally 1.2 kilometers in 22 minutes. What is the jogger's average speed in km/min?

Answers

Answer:

3.5+35

1.5+1.2

20+22

42 + 16

= 58 ¹²

Your Cardiovascular system is made up of what three body parts?

Question 1 options:

Heart


Lungs


Blood vessels


Blood


Muscles

Answers

Answer:

heart, lungs, blood vessels

Explanation:

Which mineral is commonly found in igneous rocks?
A. halite
B. feldspar
C. gypsum
D. talc

Answers

Answer:

d

Explanation:

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