Which force requires contact?

A. The force of attraction between two masses
B. The force produced by interactions between electrically charged objects
C. The force exerted by air as an object moves through it
D. The force produced by interactions between magnetic objects

I personally think it’s D but I’m not too sure

Answers

Answer 1

Answer:

I think its D too

Explanation:

Answer 2

Answer:

It’s C bruh

Explanation:


Related Questions

What forces come in pairs? Give an example help ASAP

Answers

Action and reaction forceZ

Which scientist's idea what "gases are formed from tiny particles so small you can't see them. The particles are spread out into a certain area and move when people walk through them."

Answers

Answer:

Bernoulli

Explanation:

Hello! I took the k12 science quiz!  I hope you get an A!

Have a blessed day! :)

Bernoulli was the scientist who gave the idea that "gases are formed from tiny particles so small you can't see them. The particles are spread out into a certain area and move when people walk through them."

What is an ideal gas?

It is an imaginary gas for which the volume occupies by it is negligible, this gas does not exist in a practical situation and the concept of an ideal gas is only the theoretical one,

Bernoulli was the scientist who gave the idea that "gases are formed from tiny particles so small you can't see them. The particles are spread out into a certain area and move when people walk through them."

The kinetic molecular theory of gases is stated via Bernoulli's principle. The hypothesis states that gas particles are tiny and separated from one another. But when things travel through them, they change from their position as a result of fluid dynamics.

Learn more about ideal gas from here,refer to the link;

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Ina shoots a large marble (Marble A, mass: 0.08 kg) at a smaller marble (Marble B, mass: 0.05 kg) that is sitting still. Marble A was initially moving at a velocity of 0.5 m/s, but after the collision it has a velocity of −0.1 m/s. What is the resulting velocity of marble B after the collision? Be sure to show your work for solving this problem along with the final answer.

Answers

Answer:

2.4 m/s

Explanation:

Momentum is conserved.

m₁u₁ + m₂u₂ = m₁v₁ + m₂v₂

(0.08 kg)(0.5 m/s) + (0.05 kg)(0 m/s) = (0.08 kg)(-0.1 m/s) + (0.05 kg) v

0.04 kg m/s = -0.08 kg m/s + (0.05 kg) v

0.12 kg m/s = (0.05 kg) v

v = 2.4 m/s

WHO CAN ANSWER BOTH 14 and 15 WITH UNITS ILL PUT U AS BRAINLEST!

Answers

Answer:

14. V=8

15. V=40

Explanation:

simplifying:

14. 4 32/8

V=8

15. 20 1000/50

V=40

____________ occurs when heat is transferred into an object through motion or movement; an example would be boiling water. a conduction b convection c radiation d heat

Answers

Its a Conduction NO FOR REAL ITS A

Answer:

c, convection

Explanation:

edge 2020

a chemical reaction a temperature change may occur because of the breaking or formation of chemical bonds that release excess energy. Since there is a change in temperature why wouldn't this reaction be considered a physical change instead of a chemical change ?

Answers

Answer:

well, a chemical change will have to have something about its physically feature to be changed and it cannot be undone, say you burned wood, thats a chemical change as you cannot unburn it or remove the markings of the burn

:

Select ALL that apply.The displacement method of measuring volume:
A. is the only way to measure volume.
B. can be used to measure the volume of solids.
C. can yield inaccurate results.
D. is always accurate.
E. is not affected by solubility.

Answers

Answer:

Explanation:

C. Can be used to measure the volume of solids

If I was of help mark as brainliest I am 1 short

Answer:

is not always accurate and may yield incorrect results if the matter is soluble in liquid.

               

7
Select all the correct answers.
The distance from Earth to the moon is 384.400 kilometers. What is this distance expressed in scientific notation?

Answers

Answer:

3.844 x 10 to the 5th power

Explanation:

The law of____suggests that the orbit of planets is not circular but____.

Answers

The law of planetary motion suggests that the orbit of planets is not circular but elliptical.

Position-Time Graph
30
Position (m)
10-
8)
Time (s)
The graph above represents the motion of a car. Based on the graph, the car is most
likely-
A) driving up a steep hill
B) speeding up
C) driving at constant speed
D) decelerating

Answers

Answer:

Option (C)

Explanation:

From the graph attached,

Position of a car is changing with time.

Let the two points (1, 5) and (2, 10) define the positions of a car at the different moment of time.

Since, speed = [tex]\frac{\text{Distance traveled by the car}}{\text{Time taken}}[/tex]

                      = [tex]\frac{10-5}{2-1}[/tex]

                      = 5 meter per second

Speed of the car = slope of the line on the graph

Since slope of the line is constant, speed of the car will be constant.

Therefore, Option (C) will be the answer.

Mrs. Ernest wants to know how much light her daisies need. She places one pot of daisies under a sunlamp and another pot of daises on a windowsill. Each day she gives both plants the same amount of water. Which term BEST describes the amount of water given to the plants each day?

Answers

Answer:

Control Variable

Explanation:

A control variable is a variable that is held constant throughout the cause of an experiment, in order to test accurately the relationship between the dependent and the independent variables. The control variable, which is amount of water needed by the plants in this case, has the property of affecting the growth of the daisies, hence if it is not held constant, the result of the experiment might not be accurately attributed to the light source alone.

Therefore, to say with certainty that the difference seen in both categories of plants was from the difference in lighting alone, other variables (amount of water, type of soil, temperature etc.) has to be held constant

A stunt man projects himself horizontal from a height of 60m. He lands 150m away from where he was launched. How fast was he launched?
A.) 54.87 m/s
B.) 43.98 m/s
C.) 47.46 m/s
D.) 42.87 m/s

Answers

Answer:

D) 42.87 m/s

Explanation:

First, find the time it takes him to land.  Given in the y direction:

Δy = 60 m

v₀ = 0 m/s

a = 9.8 m/s²

Find: t

Δy = v₀ t + ½ at²

60 m = (0 m/s) t + ½ (9.8 m/s²) t²

t = 3.5 s

Next, find the speed needed to travel the horizontal distance in that time.  Given in the x direction:

Δx = 60 m

a = 0 m/s²

t = 3.5 s

Find: v₀

Δy = v₀ t + ½ at²

150 m = v₀ (3.5 s) + ½ (0 m/s²) (3.5 s)²

v₀ = 42.87 m/s

The atomic mass tells us how many______
and _______
an element has.

A. protons and electrons
B. protons and neutrons
C. electrons and neutrons

Answers

Answer:

A

The atomic mass tells us how many protons and electrons an atom has.

The answer is A.

A ball rolling down a ramp accelerates from 0 m/s to 40 m/s in 10 seconds. What is its acceleration?

Answers

Answer:

4

Explanation:

you have to divide the velocity by time so 40 divided by 10 and the answer should be 4

Answer:

Its acceleration is 4 m/s^2.

1. what is the displacement of the car between 0s and 24 s?
2. what is the distance of the car between 0s and 24s?

Answers

Answer:

1). Displacement = 24 m

2). Distance = 28 m

Explanation:

We will use the concept that distance is a scalar quantity and displacement is a vector quantity.

1). Displacement of the car between 0 s and 24 s

  Displacement = distance between origin (0, 0) and a point on x - axis (24, 0)

                          = 24 - 0

                          = 24 meters

2). Distance traveled by the car = Distance traveled by the car on the ramp

    = Distance traveled on the tracks (AB + BC + CD)

    AB = [tex]\sqrt{6^2+8^2}[/tex]

          = [tex]\sqrt{36+64}[/tex]

          = [tex]\sqrt{100}[/tex]

          = 10 m

    BC = 16 - 8

          = 8 m

    CD = [tex]\sqrt{8^2+6^2}[/tex]

          = 10 m

     Therefore, distance traveled by the car = 10 + 8 + 10

                                                                        = 28 m

Answer:

1). Displacement = -12 m

2). Distance = 12 m

Explanation:

what are the factors on which pressure exerted by a liquid depend​

Answers

[tex]\huge\mathfrak\red {Answer:}[/tex]

Pressure within a liquid depends only on the

density of the liquid, the acceleration due to gravity, and the depth within the liquid.

The pressure exerted by such a static liquid increases linearly with increasing depth.

[tex]\mathfrak\purple {Hope\: this\: helps\: you...}[/tex]

What are a few questions Civics can help you answer?

Answers

Answer:

go on Quizlet they mosly have answers for civics

Explanation:

HEY CAN ANYONE HELP ME OUT IN DIS RQ!!!!!!

Answers

Answer:

40 laps

Explanation:

400/10

40

PLS MARK ME AS THE BRAINLIEST

In scientific notation 674.3mm equals

Answers

Answer:

6.743 x 10² mm

Explanation:

(01.06 LC)

When is equilibrium reached? (5 points)

a

When supply is greater than demand

b

When demand equals supply

С

When supply is less than demand

d

When demand and supply both change

Answers

Answer:

Equilibrium is reached when demand equals supply.

Explanation:

Demand is the amount that consumers want and can buy of a certain product or service in a specific period of time and at a certain price. On the other hand, the supply is the amount that producers want and can sell of a certain product or service in a specific period of time and at a certain price.

In market equilibrium, the quantity demanded of the product or service equals the quantity supplied, so the price also equals. In other words, when market equilibrium is reached, demand and supply are the same, with their corresponding equilibrium price and quantity.

Two situations can occur:

When the quantity demanded is greater than the quantity supplied, the market is in a situation of excess demand. On the other hand, it may happen that the price at which the products are being offered is greater than the equilibrium price and the quantity supplied is greater than the quantity demanded. Then there is an excess supply.

Equilibrium is reached when demand equals supply.

Calculate the volume of a 5-g sample of pure gold

Answers

Answer:

≈ 0.26 cm³

Explanation:

Hi there !

Gold is a metal with a very high density.

The density of gold is higher than that of lead.

Density(gold) = 19300 kg/m³ = 19.3 g/cm³

19.3 g ............ 1 cm³

5 g ..................x cm³

x = 5g×1cm³/19.3g = 0.2590 cm³ ≈ 0.26 cm³

Good luck !

A student planted bean seeds in two cups and placed the cups on a sunny windowsill. One cup was given 10 mL of water and the other cup was given no water. What are two things that should be kept constant in this experiment?

Answers

Answer: The water and sun.  

   Please hit that brainlist button and hoped it helped you out.

Why is the handle made of a different material than the rest of the pot?

Answers

Answer:

Hi there!

Your answer is:

The handle is made from a different material than the rest of the pot because you want to be able to safely move & touch the handle without getting burnt. The pot is made of conductors, like metal, to help it get hot quickly and cook evenly. You need to be able to touch the handle without being in danger, so the handle is made of an insulator, like wood, which doesn't get hot easily

I hope this helps!

Answer: the handle is made up of different material than the rest of the pot because the handle can conduct heat into your hand if its the same material.

How can rocks reveal a places history

Answers

Answer:

the rocks have different layers to them which can contain fossils and different kinds of rocks

This protects the surrounding environment, human beings, and the
reactor itself from radiation,

Answers

Answer:

renewable sources

Explanation:


Which of the following did the doll experiment not suggest?
A. African Americans attributed more positive characteristics to the white dolls.
B. African Americans had feelings of inferiority because of school segregation.
C. African Americans preferred to play with the white dolls when given a choice.
D. African Americans felt more secure and positive because of school segregation.

Answers

Answer: I do believe the answer is D if not then sorry and let others know in the comment section

The doll experiment did not suggest the African Americans felt more secure and positive because of school segregation. The correct option is D.

What is school segregation?

School segregation in the United States is the segregation of students based on their colors and caste. An institution can be predominantly owned by the black and only black students can study into it.

The Americans who are black belonged to the African continent. They felt more safety and secure by studying into this segregated school.

Thus, the correct option is D.

Learn more about school segregation.

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A jogger runs at a constant rate of 10.0 m every 2.0 seconds. The jogger starts at the origin and runs in the positive direction for 3600.0 seconds. Hint: Draw a position- time graph.
a. Where is the runner at time t= 5.0 s?
b. Where is the runner at time t= 15.0 s?

Answers

Answer:

(a) 25 m

(b) 75 m

Explanation:

Given that the jogger runs at a constant rate of 10.0 m every 2.0 seconds.

So, the speed of the jogger,

[tex]v=\frac{10}{2}=5m/s\;\cdots(i)[/tex]

Let d be the distance covered by him in time, t s.

As distance=(speed) x (time)

So, [tex]d=vt[/tex]

From equation (i)

[tex]\Rightarrow d=5t\;\cdots(ii)[/tex]

As the jogger starts from origin, so, the distance, [tex]d[/tex], also represents the position of the jogger at the time [tex]t[/tex] s.

The position-time graph has been shown.

(a) From equation (ii), for t=5.0 s

[tex]d=5\times 5=25 m[/tex]

So, the jogger is at a distance of 25 m from the origin.

(b) Similarly, for t=15.0 s

[tex]d=5\times 15=75 m[/tex]

So, the jogger is at a distance of 75 m from the origin.

Explain what major mistake producers made when editing the battle scenes for the movie Star Wars

Answers

Answer: Air

Explanation:

Roffns dn b bdd

Describe what happens to the water molecules as heat energy is added and the water changes from solid to liquid to gas​

Answers

Answer:

Explanation:

Adding heat can cause ice (a solid) to melt to form water (a liquid). Removing heat causes water (a liquid) to freeze to form ice (a solid). When water changes to a solid or a gas, we say it changes to a different state of matter. Even though the water's physical form changes, its molecules stay the same.

A ball is released from rest at the top of a ramp and rolls with an acceleration of 0.5 m/s2 for 10 seconds. How far does it travel during this time?

Answers

Answer:

the ball travels 0.85 miles per second

Explanation:

Answer:

0.85

Explanation:

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