Answers
Answer:
The answer for this question is
D
Related Questions
Drag the tiles to the correct boxes to complete the pairs.
Match the organisms to the descriptions.
scorpion
starfish
octopus
bird
lacks colored blood
had a soft, unsegmented body
is a vertebrate
lacks antennae
Answers
The correct matching of the organisms to their descriptions is given below:
Starfish - lacks colored bloodBird - is a vertebrateOctopus - has a soft, unsegmented bodyScorpion - lacks antennaeWhat is an Organism?Any organic, living system that performs as an independent unit is referred to as an organism. Cells comprise all living things. Multicellular mammals, plants, and fungi are examples of multicellular creatures. Unicellular microorganisms include bacteria and archaea.
All kinds of creatures can have the capacity for procreation, growth and development, maintenance, and to some extent, stimulus-response. Multicellular organisms such as beetles, tetrapods, mushrooms, and vascular plants grow a variety of tissues and organs.
Read more about vertebrates here:
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Gizmo seasons why do we have them answer key
Answers
The Earth’s ________________ on its ________ causes day and night.
Answers
Answer:
1. rotation. 2. axis
Explanation:
The Earths rotation on its axis causes day and night
Which of the following statements is true?
Solar eclipses are safe to look at without special equipment.
The International Date Line runs through Greenwich, England.
New days begin at 180° longitude.
Earth's orbit is a perfect circle.
Answers
Answer:
New days begin at 180° longitude.
Explanation:
what the difanshon of mass?
Answers
Answer:
Mass is a measure of the amount of matter in an object.
Explanation:
what does 1N equal? It happens to be one of the questions on my "Newton's Laws of Motion Exercises" paper.
Answers
Which two statements describe reasons a solar cell must contain semiconductors?
A. Semiconductors form a path for the electrons that are released by the photoelectric effect.
B. Semiconductors reflect all forms of electromagnetic radiation.
C. Semiconductors serve as a source of electrons to form an electrical current.
D. Current flows from the positively charged semiconductor to the air above the glass covering
Answers
Two statements describe reasons a solar cell must contain semiconductors :
A. Semiconductors form a path for the electrons that are released by the photoelectric effect.
C. Semiconductors serve as a source of electrons to form an electrical current.
What is Photoelectric effect?Photoelectric effect, phenomenon in which electrically charged particles are released from or within a material when it absorbs electromagnetic radiation.
When the semiconductor is exposed to light, it absorbs energy and transfers it to the material, due to which energy reaches to negatively charged particle (electron), which allows the electron to flow in the material as electric current .
hence , correct option will be :
A. Semiconductors form a path for the electrons that are released by the photoelectric effect.
C. Semiconductors serve as a source of electrons to form an electrical current.
learn more about photoelectric effect
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someone help me with this please
Answers
Answer: are u single
Explanation:
Can someone help me please, thanks.
Answers
Answer:
rotation
Explanation:
Im pretty sure. Please heart and mark brainliest
Answer:
cycle
Explanation:
either rotation or cycle. I would think.
Why is a computer considered technology and not pure science
Answers
Answer:
They aren't considered a type of science, they are machine and they are used by produced electricity so they are a type of technology like our cell phones
Explanation:
based on the information given, which part of inverstigation 2 is most likely the independent variable
Answers
Answer:
The independent variable is the variable that is changing.
Explanation:
I gave you this because you did not give us the work for use to see.
Which quantity is a vector?
displacement
distance
Answers
What is the potential energy of a 2 kg plant that is on a windowsill 1.3 m high
Answers
Answer:
25.506J
Explanation:
Ep = mgh
given that ,
m = 2kg
h =1.3m
g = 9.81 m/s^2
Ep= 2 × 1.3 × 9.81
Ep= 25.506J
Remi travels 160 meters in 4 seconds. What was Remi's initial speed if her final velocity was 6.9 m/s?
Answers
Answer:
73.1 m/s
Explanation:
Given:
Δx = 160 m
v = 6.9 m/s
t = 4 s
Find: v₀
Δx = ½ (v + v₀) t
160 m = ½ (6.9 m/s + v₀) (4 s)
v₀ = 73.1 m/s
An object is dropped from 20. meters above the moon. The acceleration due to gravity on the moon is 1.62 m/s^2
a. How long does it take for the object to impact the moon?
b. At what speed does it impact the moon?
Answers
Answer:
a. Approximately 3.21 seconds
b. Approximately 5.196 m/s
Explanation:
a. The height from which the object is dropped = 20 meters
The location of the occurrence = The moon
The acceleration due to gravity on the moon = 1.62 m/s²
The time it took the object to to impact the moon is given by the equation of free fall as follows;
h = 1/2·a·t²
Where;
h =The height from which the object is allowed to freely fall = 20 meters
a = The acceleration due to gravity on the moon = 1.62 m/s²
t = The time of motion of the object
Substituting the values, gives;
20 = 1/2 × 1.62 × t²
t² = 20/(1.2 × 1.62) ≈ 10.23 s²
t = √ 10.23 ≈ 3.21 s
The time in motion of the object before impact, t = 3.21 seconds
b. The final speed, v is given from the equation for speed under free fall, which is presented as follows;
v = u + a·t
Where
u = The initial vertical velocity = 0
Substituting the values gives;
v = 0 + 1.62 × 3.21 ≈ 5.196 m/s
The final speed, v with which the object impacts the moon ≈ 5.196 m/s
5.Projectile motion is free fall with an initial horizontal velocity. True or false
Answers
Explanation:
One of the interesting things about projectile motion is that the horizontal motion is independent of the vertical motion. Recall that in freefall, an object continually experiences a downward acceleration of 9.80ms2 but has no horizontal acceleration.
Dos masas de 8kg es tan unidas en el extremo de una varilla de aluminio de 400mm de longitud. La varilla está sostenida en su parte media hora en círculos y solo puede soportar una tensión máxima de 800 N ¿cuál es la frecuencia máxima de revolución
Answers
Answer:
The maximum frequency of revolution is 3.6 Hz.
Explanation:
Given that,
Mass = 8 kg
Distance = 400 mm
Tension = 800 N
We need to calculate the velocity
Using centripetal force
[tex]F=\dfrac{mv^2}{r}[/tex]
Where, F= tension
m = mass
v= velocity
r = radius of circle
Put the value into the formula
[tex]800=\dfrac{8\times v^2}{200\times10^{-3}}[/tex]
[tex]v^2=\sqrt{\dfrac{800\times200\times10^{-3}}{8}}[/tex]
[tex]v=4.47\ m/s[/tex]
We need to calculate the maximum frequency of revolution
Using formula of frequency
[tex]f=\dfrac{v}{2\pi r}[/tex]
Put the value into the formula
[tex]f=\dfrac{4.47}{2\pi\times200\times10^{-3}}[/tex]
[tex]f=3.6\ Hz[/tex]
Hence, The maximum frequency of revolution is 3.6 Hz.
Determine which wave carries the greater
amount of energy. explain
Answers
What are the relationships between the different wave properties (frequency, wavelength, wave speed, period, amplitude)
Ex) As ___ increases, ___ increases/decreases/remains the same.
Answers
Answer:
As frequency (cycles per second) increases the wavelength decreases.
As frequency increases the period also decreases
If wave speed or velocity increases, so too does the frequency
Amplitude of a wave is totally independent of frequency, period etc. So it remains the same as frequency shifts. Like FM radio the amplitude remains the same as the frequency of the broadcast modulates.
Explanation:
F= 1/t Frequency is inversely proportional to time (wavelength)
Period is the time it takes for one wave cycle to complete Period is 1/f
++++++++++++++++++++++++++++++++++++
vw=λT Speed of propagation vw= wavelength x T time
vw=fλ Knowing frequency multiply times wavelength to get wave speed.
++++++++++++++++++++++++++++++++
Amplitude varies only as the energy applied varies. Like transmission power, in a 60 hz power feed the amplitude can be 120, 230, 460 volts (note these nominal amplitudes are RMS root mean squared or .707 of the peak of the waveform).
See link below, images are much easier to process, than plain text of course. Hope this helps.
Oops not allowed to post a link, it appears. so try the snippet of URL as attached.
Answer:
Im no expert buh its Wave length. :)
Explanation:
Im taking a test about it hope it helps.
A portable electric saw is used to cut through a wooden log. What happens to the pitch of the sound from the saw as the blade cuts farther into the log? Why?
Answers
APPLYING MAIN IDEAS
How did Bartolomé de Las Casas attempt to help Native Americans?
a.
He petitioned for shortening their workday in the mines.
b.
He convinced Spanish merchants to sell Native American goods around the world.
c.
He asked the king of Spain to enact laws prohibiting their enslavement.
d.
He convinced the Spanish government to grant encomiendas to settlers.
Answers
Typically, people think of a lava flow when they think of volcanoes. However, some eruptions are mostly ash and steam released into the atmosphere. This type of volcanic eruption is blamed for causing what is referred to as a "Little Ice Age" starting in the 13th century. The ash and steam blocked the sun's rays causing extreme cold and agricultural difficulty which lead to massive decreases in populations.
Describe how the energy from the sun is vital to life. In your response, be sure to include:
1. The form(s) of energy that the sun provides to the Earth.
2. How energy from the sun is transformed on the Earth.
3. At least two ways humans depend on the sun's energy for survival.
Answers
Answer:
number 2
Explanation:
please type any energy transformation it will help a lot i would really appreciate it
prize: brainliest
Answers
Answer:
in electric lamp
Electric Energy to Heat and Light Energy
Explanation:
Answer:
Ex: an electric fan transforms electric energy to kinetic energy
Or
Chemical energy to heat and light energy
Explanation:
Hope this helps
A student stands on a spring scale. The scale reads that her weight is 600
Newtons. What is the student's approximate mass?
Answers
Answer:
61.2
Explanation:
F=g.m
<=> 600 = 9.8m
<=> m = 61.224489...
The North American Plate moves at 2.5 cm per year. How many mm does it move in 1 year? Millimeters per day?
Answers
I really hope this is correct :)
The cat quickly hopped from the floor onto the couch.
is an example of what? position, motion, speed, velocity or acceleration
Answers
Answer: Motion
Explanation:
what are some hack that I can use to heal up my eyes?
Answers
Answer:
All 7 Dragonballs
Explanation:
the dragonball Summon shenron which will then grant you a wish
A car traveling around a corner
A. position
B. speed
C. velocity
D. acceleration
Answers
THE ANSWER IS D THERE YOU GOO
a child riding a bicycle at 15 meters per second accelerates at -3,0 meters per second? for 4.0 seconds. What is the child's speed A at the end of this 4.0-second interval? (with work, all steps))
Answers
Answer:
27m/sExplanation:
Given data
initital velocity u=15m/s
deceleration a=3m/s^2
time t= 4 seconds
final velocity v= ?
Applying the expression
v=u+at------1
substituting our data into the expression we have
v=15+3*4
v=15+12
v=27m/s
The velocity after 4 seconds is 27m/s
True or False
The ecological niche of a species is the place where its members live.
Answers
Answer:
true
Explanation: