E=mc2
Formula
E = energy
m = mass
c = the speed of light
What 2 materials are the planets in our solar system made of?
Please answer this quickly please please please please please please please
they are made up of rock and gas
Answer:
Hydrogen and Helium. 75% Hydrogen and 25% Helium.
Explanation:
What do you call the material or "stuff" that a wave travels through
A medium
B wave
C decibel
D doppler
what is meaning of phase
Answer:
phares
[tex]phares \\ \\ means \: a \: noun \: \\ \\ i \: thnk \: so \: \:[/tex]
It's a distinct stage in a process of change or dev't
a
plastic tube which has been rubbed with animal fur and gained 3.8x10 electrons.
What variables must be known to determine the observed frequency of a wave?
Answer:
The frequency, 'f', of a wave is given by the speed, 'v' of the wave and the wavelength, λ, of the wave
f = v/λ
The frequency, 'f', of a wave is also given by the inverse of the period, 'T', of the wave which is the time it takes the wave to complete an oscillation or a cycle
f 1/T
Therefore, the variables to be known to determine the frequency of a wave includes either, the velocity and the wavelength of the wave or the period of oscillation (the wave cycle) of the wave
Explanation:
What is the time it takes an object that moves at 25 m/min to travel 505 meters?
Answer:
25 meters = 1 minute
505 meters = ? minutes
Therefore, 505/25
Therefore, 101/5
Therefore, 2.2 minutes
It moves 505 meters in 2.2min
explain in 2-3 sentences how a genotype determines a phenotype!
Will give b to the best one
Answer:
Genotype can be determined by biological tests. Both the genotype and phenotype sounds similar but have differences. The phenotype is determined by an individual’s genotype and expressed genes or by visible trait, for instance, hair color or type, eye color body shape, and height. We are all unique. Even monozygotic twins, who are genetically identical, always have some variation in the way they look and act. This uniqueness is a result of the interaction between our genetic make-up, inherited from our parents, and environmental influences from the moment we are conceived.
The entropy of the substance seems to decrease as this substance freezes. Why is this not contradicting the second law of thermodynamics?
Answer:
See Explanation
Explanation:
While it is true that a version of the second law of thermodynamics stated with respect to entropy states that the entropy of a system only increases or remains the same. It never decreases!
It then appears to be a contradiction when the freezing of ice leads to a more ordered structure and a seeming decrease in entropy of the ice as water changes from liquid to solid.
This law of thermodynamics is not violated here because the entropy of the universe increases (freezing is an exothermic process). This outweighs the decrease in entropy of the system hence the change in entropy is positive and the second law of thermodynamics is not violated.
In an experiment, you test whether the number of times you rub a cloth against a balloon changes how long it will stick against the wall. You start by rubbing the balloon 10 times with the cloth and stick it to the wall. You repeat this three times and record your results in a table.
Observation
Number of Times Balloon is Rubbed by Cloth Trial #1 Trial #2 Trial #3
10 6 seconds 20 seconds 20 seconds
What statement best reflects why you should do repeated trials in an experiment? (2 points)
a
Rubbing the balloon against a cloth 10 times produces very different results each time it is repeated.
b
The first trial is right because it is done with new materials that give the best results.
c
The second and third trials were wrong because they were very different from the first trial.
d
You would make a wrong conclusion if it were based on the first trial in the experiment.
Use the drop-down menu to select the education or qualification best demonstrated in each example.
Maritza is friendly and polite to people who enter the store where she works.
✔ customer-service skills
Darren stays calm and does not get frustrated when dealing with an angry customer.
✔ patience
Yelena is able to lift heavy items on high shelves.
✔ physical strength
Maritza is friendly and polite to people who enter the store where she works. She has customer-service skills.
What is the qualification?Qualification is a special skill or experience that makes someone suitable for a certain job. It shows the level of education. Everyone gets a job according to their qualification. It is formal documentation someone gets after completing the education.
Darren stays calm and does not get frustrated when dealing with an angry customer. He has patience.Yelena is able to lift heavy items on high shelves. She has physical strength.Maritza is friendly and polite to people who enter the store where she works. She has customer-service skills.Thus, these are the qualification or skills of Maritza, Darren, and Yelena.
Learn more about qualifications, here:
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The noble gas neon is used for filling neon signs. Like other noble elements, it has a full octet (complete outer energy level) of electrons, which makes the gas A. freeze at room temperature. B. react with other gases in the air. C. unlikely to combine with other elements. D. solidify at standard pressure and temperature, chiny pray-colored solid at room
Answer:
C. unlikely to combine with other elements.
Explanation:
In Chemistry, electrons can be defined as subatomic particles that are negatively charged and as such has a magnitude of -1.
Valence electrons can be defined as the number of electrons present in the outermost shell of an atom. Valence electrons are used to determine whether an atom or group of elements found in a periodic table can bond with others. Thus, this property is typically used to determine the chemical properties of elements.
Noble gases are chemical elements with eight valence electrons and as such have a full octet. Some examples are argon, neon, etc.
Hence, the full octet makes the gas (neon) unlikely to combine with other elements.
Find the wavelength of a transverse wave the frequency of the wave motion is 3 Hz and the wave travels with a velocity of 48 m/s .
Answer:
16 m
Explanation:
Does the polarity of the rocks in the Aragorn Sea suggest that it is currently expanding? Explain. Thanks This is the last question
The answer is no. Hope this helps
A string 1.30 meters in length is oscillating in its first harmonic. The frequency of
oscillation is 7.80 Hz. What is the wavelength of the first harmonic?
Answer:
2.6m
Explanation:
The formula for calculating the wavelength is expressed as;
λ = v/f
v is the velocity
f is the frequency of vibration
Given
f = 7.80Hz
We need to get the velocity
For string;
f = V/2L
7.80 = V/2(1.3)
7.80 = V/2.6
V = 2.6 * 7.8
V = 20.28m/s
Get the required wavelength
λ = v/f
λ = 20.28/7.80
λ = 2.6m
Hence the wavelength of the first harmonic is 2.6m
Two point sources are simultaneously creating waves with a wavelength of 6 cm. Point X lies between the two sources. It is 9 cm from one source and 15 cm from the other. What wave heights do you expect at point X? A. The waves will never get very high or low. B. The waves may get very high, but will never get very low. C. The waves may get very low, but will never get very high. D. The waves will sometimes get very high and very low.
Answer:
OPTION D (The waves will sometimes get very high and very low) is the answer.
Explanation:
Wavelength = velocity ÷ frequency
As the frequency which measures the number of waves per unit of time is inversely proportional to the wavelength, point X which lies between two sources, and one source is shorter than another, the wave heights at point x will vary as the distances from point X vary too. This means that waves at point X depending on the wave type and source will get very high at times and very low.
A 188 W motor will lift a load at a rate of 0.065 m/s. How heavy of a load can the motor
lift at this rate?
Answer:
2892.31 N
Explanation:
Applying,
P = F×v................ Equation 1
Where P = power of the motor, F = Weight of the load the motor can lift, v = velocity
make F the subject of the equation
F = P/v.............. Equation 2
Given: P = 188 W, v = 0.065 m/s
Substitute into eequation 2
F = 188/0.065
F = 2892.31 N
Hence the weight of the load is 2892.31 N
Which descriptions refer to cumulus clouds? Select three options.
are fluffy
form layers
are usually gray
form 1–1.5 miles above Earth
can extend up to 10 miles into the sky
Answer: are fluffy
form 1-1.5 miles above Earth
can extend up to 10 miles into the sky
Explanation:
Cumulus clouds are referred to as the clouds that have have flat bases and its appearance resembles that of floating cotton.
Cumulus clouds simply shows a fair weather. Cumulus cloud also forms 1-1.5 miles above Earth and can also extend up to 10 miles into the sky.
Answer:
Answer: are fluffy
Explanation:
13. How much work does a 35 N force do to lift a potted plant from the floor to a shelf 6 m high?
F = 35N
Id=6m
Wa
Answer:
W= 210 N
Explanation:
Just use work = Fparallel*d
W= 35*6
W= 210 N
If a machine increases force it must apply the force over a long distance? True or false
Answer: The machine must apply the force over a shorter distance. That's because a machine doesn't change the amount of work and work equals force times distance. Therefore, if force increases, distance must decrease
FALSE
HOPE THIS HELPS
Neutrons have a
charge______.
Answer here
Answer:
neutral
Explanation:
the nearest star to our planet other than the sun , is 4.4 light year away.One light-year is the distance light travels in a year.
* HOW LONG DOES IT TAKE FOR TO REACH US?
* SUGGEST WHY LIGHT-YEAR IS USED AS THE UNIT FOR MEASURING THE DISTANCE BETWEEN DISTANT STARS AND OUR PLANET, RATHER THAN THE UNIT 'KILOMETER,
Answer:
1606
The main reason for using light years, however, is because the distances we deal with in space are immense. If we stick to miles or kilometers we quickly run into unwieldy numbers just measuring the distance to the nearest star: a dim red dwarf called Proxima Centauri that sits a mere 24,000,000,000,000 miles away!
Explanation:
Can anyone plz send me the solved questions this is Energy chapter
Answer:
34' jhm
Explanation:
Part G Assume that friction causes the car to lose 37,800 joules of energy as it travels from the top of the first hill to the bottom.
What's the car's velocity at the bottom of the first hill? Use your answer from part C (416,500) and the formula v= to determine the answer.
(This formula is the kinetic energy formula, rearranged to find v.) 2KE
Answer:
29.9 m/s
Explanation:
answer on edumentum
Answer:
Because energy is conserved, the kinetic energy at the bottom of the first hill is the potential energy at the top of the hill, minus energy lost from friction:
KE = 416,500 J – 37,800 J = 378,700 J
To find the velocity of the car, plug the values for KE and m into the formula and solve:
The roller coaster car has a velocity of about 29.9 meters/second at the bottom of the first hill.
Explanation:
edmentum
A lens with f = 35.0 cm is held
42.0 cm from an object. Where
does the image form?
Answer: 210 cm
Explanation:
Look up Thin Lens Equations Calculator- it helps!
examples for each different examples force affects
Explanation:
Examples for effect of force - example
1) Can change the state of an object(rest to motion/ motion to rest):For example, pushing a heavy stone in order to move it. 2) May change the speed of an object if it is already moving. ... 3) May change the direction of motion of an object.
A 500N car is pulled up to 20m plank to a flat form 5m above the ground by an effort of 150N parallel to the plank. Calculate Velocity Ratio?
Answer:
4
Explanation:
Velocity ratio is the ratio of distance moved by effort to the ratio of distance moved by load
Velocity ratio = Distance moved by effort / Distance moved by load
Distance moved by effort = 20m
Distance moved by load = 5m
20m / 5m = 4
a water bomber flying with a horizontal speed of 85m/s at a height of 3000m drops a load on a fire below. How far in front of the target fire should the load be released?
Answer:
2081.65 m
Explanation:
We'll begin by calculating the time taken for the load to get to the target. This can be obtained as follow:
Height (h) = 3000 m
Acceleration due to gravity (g) = 10 m/s²
Time (t) =?
h = ½gt²
3000 = ½ × 10 × t²
3000 = 5 × t²
Divide both side by 5
t² = 3000 / 5
t² = 600
Take the square root of both side
t = √600
t = 24.49 s
Finally, we shall determine the distance from the target at which the load should be released. This can be obtained as follow:
Horizontal velocity (u) = 85 m/s
Time (t) = 24.49 s
Horizontal distance (s) =?
s = ut
s = 85 × 24.49
s = 2081.65 m
Thus, the load should be released from 2081.65 m.
* science*Name the two types of neutron stars.
Answer:
Radio pulsars and Recycled pulsars
Explain how tangential speed depends on distance.
PLEASE HELP ASAPPPP!!!!!
Katrina replaced the batteries in her camera with rechargeable ones. Later as she was recharging the batteries, Katrina told her mother “I am creating energy so that I can use these batteries again!” What was Katrina actually doing?
removing energy
destroying energy
transforming energy
repairing energy