Answer:
conduction if i hold a hot cup the cup is giving heat which comes in contact with my hands warming my hands
A biologist studied the trees in a nature preserve. She found that there were 4 different types of trees—pine, pecan, maple, and oak. The table below shows how many of each type of tree she found. Which circle graph is correct for the data in the table?
Help me please it’s urgent
Answer:
I Think A But Im Not Sure About It
Scientists discovered how to use x-rays over 100 years ago. They found that x-rays
could pass through soft parts of the human body but were stopped by hard body
parts. How do doctors use x-rays today?
A.to find injuries
B.to cure diseases
C.to prevent illnesses
D.to protect body parts
How are both electromagnetic and mechanical waves used when people communicate with each other?
Electromagnetic and mechanical waves used when people communicate with each other, this done by an antenna(sender & receiver)
What is antenna ?An antenna is a metallic structure that produce or/and receives electromagnetic waves it is available in different shapes. There are different types of antennas which are Short Dipole antenna, Dipole antenna, Loop antenna, Monopole antenna.
when input of the Dipole antenna is connected to the electric signals having certain frequency. Due to change in the electric signal, there is fluctuation in polarity of dipoles in dipole antenna and that change in the dipole produces electromagnetic wave.
when electromagnetic wave is received by the dipole antenna, dipoles in the antenna get affected by electromagnetic waves, dipoles fluctuate at frequency of received electric signals and produces electric signals of same frequency as electromagnetic wave.
Sound wave is mechanical wave. sound wave is converted in electric signals by using microphone, it gets amplified and given to to input of the antenna(Transmitter). This antenna converts Electric signal into electromagnetic wave. This converted electromagnetic wave is received by another antenna(receiver). this antenna converts electromagnetic wave into electric signals, this signals are amplified and given it to the speaker.
Hence this is how people use electromagnetic and mechanical waves for communication.
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How does freezing and evaporation affect salinity?
Choose ALL that apply
Select 3 correct answer(s)
Question 1 options:
When that water melts in the spring, the salinity decreases.
none of the choices
When ocean water evaporates, the salinity increases.
When ocean water freezes, the salinity of water increases.
Why are there variations of traits within a population?
Answer:
The variation and distribution of traits in a population depend on genetic and environmental factors. Genetic variation can result from mutations caused by environmental factors or errors in DNA replication, or from chromosomes swapping sections during meiosis.
Explanation:
Hope this helps!
Answer:
The variation and distribution of traits in a population depend on genetic and environmental factors. Genetic variation can result from mutations caused by environmental factors or errors in DNA replication, or from chromosomes swapping sections during meiosis.
Explanation:
What is the thermal energy of an object?
Question 2 options:
Its average temperature
Its ability to conduct heat.
The amount of radiation it emits.
The total kinetic and potential energy of its particles
please include explanation
Answer:The total kinetic and potential energy of its particles
Explanation:
using this link, https://www.explorelearning.com/index.cfm?method=cResource.dspView&ResourceID=1053
Observe: Click Reset. Select Lights on and turn off Show rulers. Select Longitudinal waves. Check that the Amplitude is 10.0 cm, the Frequency is 1.00 Hz, and the Tension is 2.0 N. Set the Density to 1.0 kg/m, and click Play.
What is the motion of the hand?
Turn the lights off. What is the motion of the green dot?
Follow the motion of a single compression of the wave. How does the compression move?
Answer:
1 The hand is moving at a steady up and down motion.
2 The green dot is moving in a trait up and down motion
3 It is moving in a waving and calming motion
Explanation:
Apple juice in a bottle has a volume of 475 cubic centimeters and a mass of 494 grams .Calculate its destiny
please help me eseghgtrhj
The correct answer is C.
Look in the comments. I d a r e y o u
Answer:
Where is the comments??
Explanation:
Answer:
ok
Explanation:
You should have drawn the coaster following a straight line after it slipped off the track. Since that is the path it would take without the track, there must be an unbalanced force causing it to accelerate (turn) around the bend. What direction is that force pointing? Draw a top-view sketch of the force vectors below.
Answer:
uhhh... cool story bro?
Explanation:
The table below shows the characteristics of three components of the solar system labeled A, B, and C. Which choice identifies the components in the correct order?
A Made of ice, rocks, gas, and dust
Revolves around a star
Has a tail of dust and gas
B Revolves around a star
Smaller than a plane
revolves around a star
C Revolves around a star
Rotates on its axis
large body of rock or gas
1. Comet, asteroid, planet
2. Comet, planet, star
3. Planet, asteroid, moon
4. Star, planet, comet
Answer:
1
Explanation:
The gravity of Earth is attracting a person towards the center with 500N of gravitational force. The person is exerting a reactionary force on the Earth with how much force? Explain your thinking behind this.
Answer:
500n
Explanation:
PLEASE HELP ME ASAP
Identify the method of heat transfer that takes place in each illustration. Some illustrations may show more than one form of heat transfer.
Answer:1,3,5,7,8,10,11 is conduction while 2,4,6,9 is radiation
Explanation:
Which of the following metals is most reactive?
A. aluminum
B. sodium
C. copper
D. calcium
Answer:
A. aluminum
Explanation:
Aluminium is soft, lightweight and ductile with excellent thermal and electrical conductivity. It is highly reactive, though the metal is protected by a surface layer of inert transparent oxide (Al2O3) that forms rapidly in air, providing excellent corrosion resistance.
The pressure on an iceberg is greatest at the top of the iceberg. Question 2 options: True False
Answer:
false
Explanation:
The density of a substance equals its mass divided by its volume. Talia listed the density of some common materials at 20 °C.
Material
Density (g/cm3)
gasoline
0.70
mercury
13.6
milk
1.03
water
0.998
If Talia has 10 grams of each material, which material has the greatest volume?
Show your work below.
Answer:
mercury
Explanation:
What is the average kinetic energy of an object's particles?
Question 3 options:
Heat
Thermal Energy
Thermodynamics
Temperature
please include explanation
What is the average kinetic energy of an object's particles?
the answer is temperature
Based on Newton’s 3rd Law of motion, if an archer shoots an arrow at the target, the action force is the bowstring against the arrow. Explain where the reaction force can be found.
Answer: the reaction force is the arrows push against the bow sting
Explanation:the two objects must react the same , bowstring and arrow.
The most thrilling roller coasters usually contain vertical loops. What keeps the riders in their seats when they go upside-down?
HElP thank you pLeAsE
Answer:
Cell membrane
Explanation:
I've done this before
Mike is doing a project for science class. He is making an analogy of a cell and relating it to the structure and function of a city. He is looking for a building to represent the mitochondria. Which building in a city has a similar function and would best represent the role of the mitochondria in the cell?
Answer: Mitochondria are organelles that make energy for a cell; they are inherited from ... In this chapter, we will look at the structure and function of the eukaryotic cell. ... to functions of a city to emphasize that all parts are needed. ... We begin by looking at ... cell, as he peered through a primitive microscope of his own construction.
PLEASE HELP!!!!
An object with a weight of 42 N is placed in a pool. The object displaces 37 N of water. The object will:
a) sink
b) be buoyed up
c) stay in place
Which object has the most Kinetic Energy, and why?
A giant rock slowly rolling down a hill
A giant rock quickly rolling down a hill
A small rock slowly rolling down a hill
A small rock quickly rolling down a hill
I MOST IMPORTANTLY NEED AN EXPLANATION
Answer:A giant rock quickly rolling down a hill can I have brainlis?
Explanation:
15. Astronomers use different types of telescopes to observe different parts of the
electromagnetic spectrum. This allows astronomers to study objects in space. Some
electromagnetic waves are blocked by Earth's atmosphere, making it difficult for
astronomers to focus the energy into a viewable image. Instead of actually viewing
the energy, astronomers have learned to view the interactions of the energy with
the atmosphere. These faint interactions with the atmosphere allow them to study
highly energetic objects such as pulsars and black holes.
If the waves that are being observed have a frequency of 1022, what type of wave is
being observed?
A.gamma rays
B.ultraviolet
C.microwave
D.radio waves
At the frequency of 1022, the radio waves will be observed.
What is an electromagnetic spectrum?The complete range of electromagnetic radiation, classified by frequency or wavelength. Despite the fact that all electromagnetic waves have a wide range of frequencies, wavelengths, and photon energies, they all move at the speed of light in a vacuum.
The range of all electromagnetic radiation is represented by the electromagnetic spectrum, which also includes numerous subranges, also known as portions, such as visible light and ultraviolet radiation.
The various parts have different names based on variations in the emission, transmission, and absorption of the corresponding waves as well as on the various practical uses for which they are put to use.
At the frequency of 1022, the wave observed will be a radio wave.
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What is a main difference between Mars and Saturn?
1. Mars has a relatively longer distance from the sun and many more moons than Saturn.
2. Mars has a relatively shorter year and a higher atmospheric temperature than Saturn.
3. Saturn has many more rings and a relatively higher atmospheric temperature than Mars.
4. Saturn has many more rings and a relatively shorter year than Mars.
Answer:
2
Explanation:
mars has a shorter year because when it revolves around the sun, it takes less time than, saturn who is millions of miles away from mars, longer. Also, mars is closer to the sun than saturn
The main difference between Mars and Saturn is Mars has a relatively shorter year and a higher atmospheric temperature than Saturn. Hence B option is correct.
What is Mars ?One of our solar system's most studied planets is Mars. Mars is the fourth planet from the sun and features two peculiar moons in addition to a distinctive rusty red look.
Inside our solar system, there is a frigid, arid planet called the Red Planet. While it has a relatively thin atmosphere, the dusty, (as far as we can tell) dead planet is everything from boring.
Extreme dust storms may cover the whole planet, the atmosphere's carbon dioxide can get so frigid that it turns straight into snow or ice, and marsquakes—a Mars-version of earthquakes—regularly rumble the surface. Consequently, it is not surprising that scientists are still fascinated by this little red pebble.
Hence option B is correct.
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The moon orbits around the earth, which rotates on its own axis. As a result,
A)
we get different seasons.
B)
moonrise and moonset are unpredictable.
C)
the moon rises almost one hour later each day.
D)
the moon is seen in the sky for roughly 12 hours.
b is it
Explanation:
ok thx byehhhhheeehheeee
the purpose of a nuclear power plant is to transform nuclear energy to electricity. this is done in steps starting with a nuclear reaction which generates heat to produce steam. the steam in turn is used to turn a generator which finally produces electricity. which answer best illustrates these energy transformation.
A. nuclear --> mechanical --> chemical --> electrical
B. thermal --> nuclear --> mechanical --> electrical
C. mechanical --> thermal --> nuclear ->electrical
D. nuclear --> thermal --> mechanical --> electrical
Energy order is nuclear --> thermal --> mechanical --> electrical.
What is thermal energy?The energy present in a system that determines its temperature is referred to as thermal energy. Thermal energy flows as heat. Thermodynamics is a whole field of physics that studies how heat is transmitted across various systems and how work is performed in the process.
Mechanical energy, also known as kinetic energy or potential energy, is the energy that an object possesses when it is in motion or the energy that an object stores due to its position. Renewable energy is also fueled by mechanical energy.
Energy order is nuclear --> thermal --> mechanical --> electrical.
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John throws a baseball from a standing position. Which of the three possible paths will the ball follow?
Path A
Path B
Path C
Answer: C
Explanation:
Bro this is common sense. Throw something across the room and watch it. It isnt going to be repulsed and fly up. It also isnt going to continue on forever. It will clearly fall and hit the ground