A box sits on a table. A long arrow labeled F subscript P = 22 N points right. A short arrow labeled F subscript f = ? N points left. A man pushes on the box from the left. The net force acting on the box is 18 N. What is the force of friction?
–22 N
–4 N
4 N
22 N

Answer:

b -4 N

may the force be with you

Answer:

b-4 N

Explanation:

I think thats right

Which describes the ability to do work or to cause change?


physical change

matter

temperature

energy

Because of surface tension, a liquid _____.


resists flowing

forms a crystalline solid

takes the shape of its container

forms droplets

Every chemical or physical change in matter includes a change in _____.


temperature

mass

energy

chemical formula

Which of the following is the correct formula for calculating potential energy?

PE = mass x gravity
PE = mass/gravity
PE = mass x gravity x height
PE = mass + gravity + height

PLEASE HELP RIGHT ANSWER WILL GET THE BRAINLY..

PLEASE ANSWER ASAP!!!
what from Democritus' atomic model was wrong?

Want brainly?? Answer this question correctly and I got you.

20 points Scince HHEELLPP
What are the different types of tropism?
Chemotropism –

Geotropism-

Hydrotropism-

Heliotropism-

Phototropism-

Thermotropism-

Thigmotropism-

Earth's layers. I really need this by tomorrow and I don't have the mental energy to do it..

Colin is conducting an experiment about static electricity. To start his experiment, he has two balloons. He rubs one of the balloons on his head and then places both balloons close to the wall. What is the control in his experiment?

Both balloons in the experiment

The balloon he does not rub against his head

The balloon he rubs against his head

The wall he uses to test static electricity

Read the excerpt from "The Monkey's Paw.”

"It had a spell put on it by an old fakir," said the sergeant-major, "a very holy man. He wanted to show that fate ruled people's lives, and that those who interfered with it did so to their sorrow. He put a spell on it so that three separate men could each have three wishes from it."

His manner was so impressive that his hearers were conscious that their light laughter jarred somewhat.

"Well, why don't you have three, sir?" said Herbert White, cleverly.

The soldier regarded him in the way that middle age is wont to regard presumptuous youth. "I have," he said, quietly, and his blotchy face whitened.

"And did you really have the three wishes granted?" asked Mrs. White.

"I did," said the sergeant-major, and his glass tapped against his strong teeth.

"And has anybody else wished?" persisted the old lady.

"The first man had his three wishes. Yes," was the reply; "I don't know what the first two were, but the third was for death. That's how I got the paw."


Which event does the excerpt foreshadow?


A. the sergeant-major's return to India and the resulting tragedy

B. the sergeant-major obtaining the paw and the resulting tragedy

C. Mr. White's refusal of the paw and the resulting tragedy

D. Mr. White accepting the paw and the resulting tragedy

can a magnet attract a pure substance?

The number of dots near hydrogen and helium are the same as in the energy
level chart. Why?

pls helpp asapppppppppp

science is hard sometimes help please!

Earth's magnetic field is generated by the outer core. Which characteristics of this layer create that phenomenon? How do you think scientists pinpointed the cause of the magnetic field as the outer core?

Usa test prep- Look at the picture below to answer. If u answer correctly i will mark you as brainliest!

(06.01 MC)

A student made the following observations about astronomical bodies.

Observation 1: The sun rises and sets.
Observation 2: The stars move daily across the sky.

Which observation(s) can be explained using the geocentric model?

Select one:
a. Only observation 1
b. Only observation 2
c. Both observation 1 and observation 2
d. Neither observation 1 nor observation 2

Which involves a chemical change?


filtering sand from water

distilling pure water from salt water

separating hydrogen and oxygen from water

evaporating sugar from sweetened water

75 POINTS AND BRAINLY

Select the correct answer.
The formula for calculating power is work divided by time (power = work ÷ time). What are two ways of stating the same relationship?

A. work = power ÷ time
B. work = power × time
C. time = work ÷ power
D. time = work × power
E. power = work × time

PLEASE HELP VERY URGENT
1.
a) All of the balloons should be moved to the center of the floor.
b) Each balloon should be inflated more so that they are all increasing in size.
c) Each balloon should be deflated so that there is more distance between the surface of each balloon.
d) All of the balloons should be moved away from each other so there is more distance between them.
2.
a) All matter and energy were contained inside the small point.
b) Matter and energy came from dark areas of the universe and were attracted to the small point.
c) Matter and energy fell into the small point the same way a black hole attracts matter and energy.
d) Matter was condensed into a single point until energy was attracted to the matter from dark areas of the universe.

Please help quick! 3 questions if you answer all I will give brainliest

1. Identify at least two tools scientists use to study stars and galaxies, then explain how the tools you chose assist scientists in their work.

2. Name at least three properties of stars revealed by spectral characteristics

3. In 3-5 sentences, explain how a star is formed.

Both the cell membrane and the cell wall act to protect the organelles within a cell. Which of the following best describes how the cell membrane is different from the cell wall?

Mike rides his bike 30 km in 150 minutes. What is his average speed in kilometers per hour?

Pleasee help me pwease

in the upper mantle (lithosphere) our journey guide states that "movement of molten material between the crust and mantle" causes islands, volcanos, and ocean trench. what is this movement? describe how it works

When a customer in Japan was quoted a price of .39 cents a pound he thought he was being charged .39 a kilogram. He was shocked when he go the bill – since he ordered 100kg. How much was the bill?

Which is the best unit of measurement to investigate the weight of rabbits?

a: inches b: tons c: ounces d: feet
HELP DUE TODAY!

A physics teacher performed a demonstration for a science class by pulling a crate across the floor and measuring the force with a spring scale. While she pulled, a student measured the acceleration of the crate with a handheld electronic device. The results of three trials are shown below. The teacher asked the class to calculate the acceleration of the crate based on the crate’s mass and the force she applied. What conclusion can be made about the difference between the CALCULATED acceleration and the ACTUAL acceleration that occurred in the trials?

need help with these science questions!!!