the relationship between frequency and wavelength is:

a. direct
b. inverse
c. not related

Answer: A

Wavelength and frequency of light are closely related. The higher the frequency, the shorter the wavelength. Because all light waves move through a vacuum at the same speed, the number of wave crests passing by a given point in one second depends on the wavelength.

When you drop something, first of all it accelerates.
The faster it falls, the bigger the force of ______ that acts on it.
choose from the list to complete the sentence:
friction gravity air pressure

note: apparently the answer is friction but it doesn't make sense to me so please explain.

The work input = _____.

F i ÷ d i
F o ÷ d o
F o × d o
F i × d i

Which of the following is the primary function of groundwater?

A. fighting fires
B. supplying homes with drinking water
C. irrigating crops
D. mining

Which effect is created when two sound waves that are close in pitch
interact?
O A. Echoes
O B. Loudness
C. Beats
O D. Intensity

Two pine cones are falling from a pine tree. Both pine cones are falling at the same speed.
If Pine Cone 1 has LESS MASS than Pine Cone 2, which pine cone has more kinetic energy?

A meteor falls toward Earth's surface. Given that the acceleration due to
gravity is 9.8 m/s^2, what is the meteor's potential energy if it has a mass of 10
kg at an altitude of 400 m?
O A. 408 J
O B. 7,840,000 J
O C. 2J
O D. 39,200 J

Please Help Me!!!!!!

Lab Report
Motion and Forces
It’s time to complete your Lab Report. Save the lab to your computer with the correct unit number, lab name, and your name at the end of the file name (e.g., U4_ Lab_MotionAndForces_Alice_Jones.doc).
Introduction
What was the purpose purpose of the experiment?
The purpose of the experiment is to test the hypothesis.
What were the independent, dependent, and control variables in your investigation? Describe the variables for each part of the experiment.


Write a hypothesis based on observations and scientific principles.
Type your answer here:
Experimental Methods
What tools did you use to collect your data?
Questionnaires and observations.
Write your procedure. List each step so that another student could follow the procedure and repeat your experiment.
Type your answer here:
Data and Observations
Record your observations.
Type your answer here:
Conclusions
What conclusions can you draw about how the sum of forces acting on an object affect its motion? Write an evidence-based claim.
Type your answer here:
Which mass, A, B, or C, was the greatest? Use the observations from your experiment and your knowledge of Newton’s laws of motion to write an evidence-based claim.
Type your answer here:
Make a model that shows the forces acting on two blocks on a flat, frictionless surface:
A 1 N block at rest
A 1 N block with 2 N of force applied in one horizontal direction
Include arrows to represent the forces and labels to indicate the magnitude of each force. Use your model to compare and explain the motion of each block.
Type your answer here:

How will the total energy change as the car moves from point A to B to C? Assume that none of the energy is lost as friction or heat energy.

A The total energy will increase as the kinetic changes to potential and back again.

B Kinetic energy will change into potential energy and back again, but the total energy will stay the same.

C The total energy will decrease because the potential energy will change into kinetic energy.

D The total energy will decrease since it is losing potential energy at point E.

According to the law of conservation of energy, which changes would
decrease the total energy of a system?
A. An addition of 500 J of thermal energy and a loss of 250 J of
thermal energy
O B. An addition of 300 J of kinetic energy and a loss of 250 J of
thermal energy
O C. An addition of 400 J of GPE and a loss of 350 J of thermal energy
O D. An addition of 200 J of thermal energy and a loss of 350 J of
kinetic energy

Although two identical objects may have the same mass and the same weight (meaning that the force of gravity is the same for both), they may not fall to Earth at the same rate. This is because of air resistance. Any object that is falling has friction, or resistance, from the air. The larger the object, the more resistance it has as it falls.

Get two identical pieces of paper. Crumple one up into a ball, but leave the other one a flat sheet. Drop both pieces of paper off a high place at the same time. What happens? Which falls faster? Record your observations and make a conclusion, using the terms “mass,” “weight,” “force,” “resistance,” and “gravity.”

MUST BE AT LEAST 4 sentences and include the terms weight, force, resistance, and gravity.

Sam moves a box with a with a force of 400N a distance of 5 meters. How long did it take him to move the box if 20 Watts of power was used?

Which of these statements describe friction? Check all that apply. Friction allows objects to slide over each other without any resistance. Friction resists motion. Friction is a force that acts from a distance. Friction is a contact force. Friction is caused by microscopic bumps and ridges on surfaces.


i'll give you a brainlest!

What type of circuit is this in the picture? (Lesson 4.07)

A: Parallel
B: Open
C: Ac
D: Series

Aviation:


Calculate the x-component of the Drone Vector:


Calculate the y-component of the Drone Vector:


Calculate the x-component of the Wind Vector:


Calculate the y-component of the Wind Vector:


What is the Total x-component of the combined Drone + Wind vectors?:


What is the Total y-component of the combined Drone + Wind vectors?:


What is the Total Magnitude of the combined Drone + Wind vectors?:


What is the Total Angle of the combined Drone + Wind vectors?:

Trees, birds, and bacteria are all similar because they are all formed from —

Discuss one component of your school's recycling system that could be automated and predict the economic impact.

The transfer of energy by electromagnetic


#A. Radiation


#B. Convection


#C. Conduction


#D. Thermal energy

Which of these is an advantage of using models to study tectonic plate movements?

Actual plate movements can be stopped.
Actual plate movements can be made less frequent.
Models of the exact material as original can be made.
Observations can be made from outside the system.
I need an actually correct answer not some guessing game

How do we know there has not been an increase in the number of earthquakes? Officials from the U.S. Geological Survey, the government agency that keeps track of earthquakes, point to statistics. On average, there have been no more earthquakes so far in 2010 than there were in previous years.

What Happens During Earthquakes?

In reality, it's not the number of quakes that has gained our attention, but the devastating impact quakes can have. Earthquakes are very natural—it's inevitable that they'll happen because of the way the planet works. The earth's surface is made up of tectonic plates that fit together like puzzle pieces and are always moving past each other. When two of the plates' edges get caught, stress builds up at the fault line—the crack between the plates. When the plates are finally able to break free of each other, the stress is released, and an earthquake occurs. Earthquakes of varying strengths happen every day, usually at fault lines. Some of these quakes have a high magnitude, while others are relatively weak. But it's often where an earthquake takes place that determines whether it will be something that goes largely unnoticed, or a disaster that affects thousands of people.

What Is Changing?

In the past, earthquakes were not as much of a problem because Earth's population was smaller, and cities were less populated.

"Look at some of the big [earthquakes] recently," said Debarati Guha-Sapir of the World Health Organization. Guha-Sapir cited some earthquakes that took place in areas where the population had increased in recent years, making the quakes more serious. "Had the Izmit or Bhuj quakes [of 1999 and 2001] happened 30 years ago, the events would have been relatively insignificant, as the [populations] of these cities were a third of what [they were when the earthquakes happened]. Increasing population density makes a small event into a big one."

Some of the earthquakes that took place in early 2010 occurred in highly populated areas, as well. More people are moving into megacities that happen to be built on fault lines—and many cities are on fault lines. Of the 130 cities with more than one million people, more than half are in earthquake zones, making them more prone to earthquakes.

In many of these cities, officials have drawn up laws requiring that buildings be designed and constructed to endure earthquakes. But some cities, particularly those in developing countries, lack the resources to do this. There, people are rapidly putting up substandard buildings that can't withstand the force of the shaking earth. For example, the Haiti earthquake took place near the nation's crowded capital. There was a great deal of destruction because there were "too many people crammed into a city that wasn't meant to have that many people and have an earthquake," said University of Miami geologist Tim Dixon.

Another reason quakes seem worse is that we're paying more attention. Everyone noticed when the Haiti earthquake was quickly followed by the Chile earthquake. Many people watched the news and the Internet for updates on these disasters, unable to believe that they were seeing two major earthquakes in such a short period of time. But eventually, the earth will have a period when earthquakes are minor or in unpopulated areas. Then people won't notice quite so much anymore.

"People are paying attention to the violent planet we've always lived in," said Dennis Mileti, a seismic researcher. "Come back [at a time when] there have been no [noticeable] earthquakes, [and] most people will have forgotten [about them] again."

According to the article, what is one reason why it seems as if the world is experiencing more earthquakes than usual?

What is the Eiffel Tower made of?

Which skill is least needed in space creation?
Flexibility
Cardiovascular Endurance
Agility
Strength

Volcanos are a geologic phenomenon that occurs at tectonic plate boundaries.Which provides the best evidence for the theory that faults and volcanoes are results of tectonic plate interactions?
a. Faults on tectonic plates are in constant motion, but volcanoes may not erupt for many
years
b. Tectonic plates that have many faults do not usually have volcanoes.
a. Faults and volcanoes existed long before there were tectonic plates.
b. Faults and volcanoes are often found at tectonic plate boundaries.

Your science teacher gives you three liquids to pour into a jar. After pouring all of them into the jar, the liquids layer as seen in the image. What property of matter prevents the three liquids from mixing together? answers: density texture color mass

How does energy travel through a wave in a medium?
Plz help!

Which characteristics is common to the four outer planets in out solar system ?
A. Low Mass
B. Gaseous Composition
C. High density
D. Fast Revolution

25 POINTS! Q1) A cinder block is pulled 0.50 meters to the right in 3 seconds. What is the block's average speed to the nearest hundredth of a meter per second (m/s)?
Q2) A skateboarder starts at the top of a halfpipe ramp, skates through the middle, and up the other side. Match the following to describe what is happening at each of the three points in the skater's movement.


Middle


End


Beginning

1.
Maximum kinetic energy

2.
Potential and kinetic energy is equal

3.
Maximum potential energy

For each of the following four topics, write a paragraph answering the questions below each topic. This exercise should help you decide which topic on which you would prefer to write.

1.Compare and contrast a sport that is played in two different parts of the world. Describe how differently it is played in the two regions, and the impact it has on the two societies.

a. What interests you about this topic?
b. What sport and regions do you think you would choose and why?
c. How would you go about getting information on this topic?

How would the seasons be different if Earth were not tilted on its Axis?

help me pls i need the answer