except for solar cells and hydrokinetic buoys, which do all power-generation technologies use to generate electricity?
Answers
Turbine power-generation systems are used to produce energy, with the exception of solar cells and hydrokinetic buoys. The majority of electricity-generating methods use a type of turbine.
The turbine's blades are forced to spin by an external force, and that motion against a stationary generator produced energy. In a gas or steam plant, the gases drive the turbine's rotation. When a plant grows in water, the water pushes the blades (like in a dam). In a wind turbine, the wind is what propels the blades.
A solar cell, also known as a photovoltaic cell, is a technological innovation that uses the physical and chemical photovoltaic effect to transform light energy directly into electricity. Is called solar cells.
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Related Questions
An Object with a mass o 5.13kg placed on top of a spring compresses it by 0.25m (a) what is the force constant of the spring (b) How high will this object go when the spring releases its energy?
Answers
The force constant of the spring is 200.696 N/m & The height the object achieves when the spring releases its energy is 2.5087 m
The spring constant is the force needed to stretch or compress a spring, divided by the compressive or expansive distance. It's used to determine stability or instability in the spring, and therefore the system it's intended for. we know,
F = kx
Therefore,
k = F/x
We also know that the force being exerted on the spring is equal to the mass of the object. Hence, F = mg = 5.13 * 9.8 N = 50.174 N and we know compression due to the mass is 0.25m. Therefore,
K = 50.174/0.25 N/m
K = 200.696 N/m
Therefore, The Spring Constant is 200.696 N/m
On release, the spring potential energy gets converted to kinetic energy. Hence, on release, the height attained by the object is given by:
h = \(1/2 kx^{2}\)
We know that k=200.696 N/m and x=0.25 m. Therefore the height is:
h = \(1/2 (200.696 N/m)(0.25 m)^{2}\)
h = 2.5087 m
Therefore, the force constant of the spring is 200.696 N/m & The height the object achieves when the spring releases its energy is 2.5087 m
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Calculate the energy that 1.5 kg of mass contains
Answers
Answer:
\(4.5(10)^8\) joules
Explanation:
Mass–energy equivalence is the principle that says that anything that has mass has an equivalent amount of energy. Converse is also true.
The relation between energy and mass is given by \(E=mc^2\)
Here, E denotes energy, m denotes mass and c denotes speed of light
Mass \((m)=1.5\,\,kg\)
Speed of light (c) = 3 × \(10^8\) m/s
Therefore,
\(E=1.5(3)(10)^8=4.5(10)^8\) joules.
The S.I. unit of energy is joules which is equal to \(1\,\,kg\,\,m^2/s^2\)
Calculate the kinetic energy of a 9 kg watermelon being thrown at you with a speed of 12 m/s.
Answers
Answer:
648 JExplanation:
The kinetic energy of an object can be found by using the formula
\(k = \frac{1}{2} m {v}^{2} \\ \)
m is the mass
v is the velocity
From the question we have
\(k = \frac{1}{2} \times 9 \times {12}^{2} \\ = \frac{1}{2} \times 9 \times 144 \\ = 9 \times 72 \: \: \: \: \: \: \: \: \: \: \: \)
We have the final answer as
648 JHope this helps you
How does kinetic energy play a role in phase change?
Answers
During phase shift, the substance's molecules' average kinetic energy remains constant.
How does kinetic energy affect phase change?Simply put, molecules move more quickly as kinetic energy rises. Nevertheless, molecules change phases when potential energy rises. The molecule changes phases as a result of an increase in potential energy.
In a phase change, matter moves from one state to another either by gaining energy through heat and entering a more energetic state, or by losing energy through heat and entering a state with lower energy.
The energy supplied during phase change is only used to separate the molecules; none of it is used to boost the kinetic energy of the molecules. Therefore, since the molecules' kinetic energy is constant, its temperature won't increase.
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what is biodiversity
Answers
Answer:
Biodiversity is the variety and variability of life on Earth. Biodiversity is typically a measure of variation at the genetic, species, and ecosystem level. Terrestrial biodiversity is usually greater near the equator, which is the result of the warm climate and high primary productivity.
Explanation:
hope it helped <3
physics and chemistry is the study of what?
Answers
Explanation:
yan lng po Alam ko
the dimension of relative density and tension
Answers
Answer:
Relative density is proportional to the frequency of a material's density to its water density. Because both have had the same proportions, their proportion is also dimensionless.
Explanation:
The dimension of relative density:-
Relative Density of a Substance (R.D.) = Substance Density / Water Density.
Therefore, R.D. Is just a ratio or a number. There are no units or dimensions to it.
For example:- The density of iron is 8.5 GM's/cm^3 & the density of water is 1 gm/cm^3 (in cgs units).
Tension:- Surface tension is the propensity of the new worlds and infographics to reduce to the particle size which is least appropriate. Atmospheric pressure helps insects (e.g. water striders) can travel or move and on a water surface, typically object is sensed rather than water.
Help Please!
Think about how you can get the color white from using light versus how you can get the color white from using paint or dye. Now, think about how you can get the color black from using light versus from paint or dye. Using this, explain why we call coloring from light “additive” and coloring from paint or dyes “subtractive”.
Answers
Answer: Subtractive colors absorb OR subtract some lights causing it to reflect, and creating white.
Explanation:
Subtractive colors are created by completely or partially absorbing (or subtracting) some light wavelengths and reflecting others.
6.P.2.1 Matter: Properties and Changes Notes
The Theory ______
of Conservation
of
states:______
cannot be
or!____________
height
is anything that has
(weight) and height
(takes up space).
A
is the
in an object.
is the
an object takes
to add speaker notes
Answers
Answer:
The __law__ conservation
of state that either energy may produced nor destroyed
The speed and wavelength of coastal water waves are 4.0 m/s and 6.0 m respectively. When the waves enter a shallower region, the speed decreases to 1.7 m/s. What is the wavelength in the shallower region?
Answers
Answer:
v=4m/s
wavelength=6m
f=v/∧
f=0.67Hz
now, v= 1.7 m/s
f=0.67Hz
∧=v/f
∧=1.7/0.67
∧=2.54m
Explanation:
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2.54m is the wavelength in the shallower region.
What is wavelength?Wavelength exists the distance between identical points (adjacent crests) in the adjacent cycles of a waveform signal propagated in the area or along a wire. In wireless systems, this length exists usually specified in meters (m), centimeters (cm), or millimeters (mm).
Wavelength can be represented as the distance between two successive crests or troughs of a wave. It exists calculated in the direction of the wave.
v=4m/s
wavelength=6m
f=v/λ
f=0.67Hz
now, v= 1.7 m/s
f=0.67Hz
λ=v/f
λ=1.7/0.67
λ=2.54m.
Hence, 2.54m is the wavelength in the shallower region.
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An object is accelerating at -6.2 m/s? It comes to a stop after 2.0 seconds. What was its initial velocity?
A. -2.7 m/s
B. 2.7 m/s
C. 12.4 m/s
D. -12.4 m/s
NEED ASAP.
WILL GIVE BRAINLIEST.
Answers
Answer:
C. 12.4 m/s
Explanation:
Acceleration (a) = -6.2 m/s²
Final velocity (v) = 0 m/s (Comes to rest)
Time taken (t) = 2.0 s
By using equation of motion, we get:
\( \bf \longrightarrow v = u + at \\ \\ \rm \longrightarrow 0 = u + ( - 6.2)(2.0) \\ \\ \rm \longrightarrow 0 = u - 12.4 \\ \\ \rm \longrightarrow u - 12.4 = 0 \\ \\ \rm \longrightarrow u + 12.4 - 12.4 = 0 + 12.4 \\ \\ \rm \longrightarrow u = 12.4 \: m {s}^{ - 1} \)
\( \therefore \) Initial velocity (u) = 12.4 m/s
What are some of the objects found in space and their characteristics?
Answers
Answer:
meteor
Explanation:
big rock or metal maybe
a 190-lb man carries a 20-lb can of paint up a helical staircase that encircles a silo with radius 15 ft. if the silo is 80 ft high and the man makes exactly four complete revolutions, how much work is done by the man against gravity in climbing to the top?
Answers
The work done by the man against gravity in climbing to the top is 9,480 foot-pounds.
To calculate the work done by the man, we need to determine the total change in potential energy as he climbs up the helical staircase that encircles the silo. The potential energy can be calculated using the formula PE = mgh, where m represents the mass, g represents the acceleration due to gravity, and h represents the height.
In this case, the mass of the man is 190 lb, and the height of the silo is 80 ft. Since the man makes exactly four complete revolutions around the silo, we can calculate the circumference of the helical staircase. The circumference of a circle is given by the formula C = 2πr, where r represents the radius. In this case, the radius of the silo is 15 ft.
To find the work done against gravity, we need to multiply the change in potential energy by the number of revolutions. The change in potential energy is obtained by multiplying the mass, the acceleration due to gravity (32.2 ft/s²), and the height. The number of revolutions is four.
Therefore, the work done by the man against gravity in climbing to the top can be calculated as follows:
Work = 4 * m * g * h
= 4 * 190 lb * 32.2 ft/s² * 80 ft
= 9,480 foot-pounds.
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how does the relatrinihip between temprature and destiny help to explain why the drop in pressure betweem 2 km and 4km was greater at fairbanks than at key west
Answers
The drop in pressure is greater at Fairbanks than at Key West between 2 km and 4 km. This can be explained by the relationship between temperature and density.
The relationship between temperature and density can be described as follows: as temperature increases, the density of a substance decreases. The same is true in reverse: as temperature decreases, the density of a substance increases. This relationship between temperature and density helps to explain why the drop in pressure between 2 km and 4 km was greater at Fairbanks than at Key West.
This is because Fairbanks is located in a colder climate than Key West. Therefore, the air is colder in Fairbanks than in Key West. Since the air in Fairbanks is colder, it is denser than the air in Key West. As a result, when the air in Fairbanks rises to a higher altitude, it expands and cools, causing it to become even denser. This increase in density results in a greater drop in pressure between 2 km and 4 km at Fairbanks than at Key West.
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what is the constant for gravity
Answers
Answer:
G = 6.673 x 10-11 N m2/kg2
Explanation:
The Gravitational constant has been measured in three ways: The measurement with a laboratory balance of the attraction of Earth upon a test mass. The comparison of the pull of a large natural mass with that of Earth
\(9.81m/s^{2}\)
Gravity is 9.81 meters per second square, on the surface of the earth, because of the size of the earth and the distance we are on its surface from its center.
In Newtons's law, it is the proportionality constant connecting the gravitational force between two bodies with the product of their masses and the inverse square of their distance.
In the Einstein field equation, it qualifies the relation between the geometry of space-time and the energy-momentum tensor.
G is Newton's gravitational constant and gives the constant of proportionality in Newton's Universal law of gravitation.
Therefore,
the constant for gravity is 9.81 meters per second square. (\(9.81m/s^{2}\)).
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What causes magnetic stripes on the seafloor ?
Answers
Answer:
The striped magnetic pattern develops because, as oceanic crust pulls apart, magma rises to the surface at mid-ocean ridges and spills out to create new bands of ocean floor. Later, after the planet’s magnetic field flips again, the next stripe of new ocean floor aligns its polarity.
Explanation:
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sort the facts into the category that they best describe sound waves and electromagnetic waves
Answers
Answer:
Sound waves have a low speed of 330 m/s
Sound waves are mechanical waves
Electromagnetic waves have a greater speed of 3.0×10^8 m/s
Electromagnetic waves are due to disturbance of electromagnetic objects.
Question 1 options:
60 miles
1 mile
60 miles per hour
Trick question. You can't go 60 miles if an hour has 60 minutes
Answers
Answer:
Explanation:
You can drive at 60 miles per hour
D = 60 miles
t = 1 hour
Speed:
V = D / t = 60 / 1 = 60 mph
What is meant by the term weight of an object? A. the gravitational field acting on the object B. the gravitational force acting on the object C. the mass of the object multiplied by gravity D. the object's mass multiplied by its acceleration.
Answers
Answer:
In science and engineering, the weight of an object is the force acting on the object due to gravity. ... Some standard textbooks define weight as a vector quantity, the gravitational force acting on the object. Others define weight as a scalar quantity, the magnitude of the gravitational force.
Explanation:
Your answer!!The density of water is 1.00 g/mL. This means if a rock has a density of 0.87 g/mL, it will ____in water.
a) float
b) sink
Answers
Answer:
Float
Explanation:
It is given that,
The density of water is 1 g/mL
The density of a rock is 0.87 g/mL
It can be seen that the density of water is more than that of rock. The density of an object is calculated from its mass and volume.
If the density of liquid in which it is placed, is more that that of the object, it will float at the top.
Hence, in this case the rock will float.
what is the highest btu air conditioner for 110 volts
Answers
The highest BTU air conditioner for 110 volts is typically around 14,000 BTUs.
This is because 110 volts is a standard household voltage and cannot support higher BTU units without causing potential electrical issues. However, there are some models that claim to have higher BTUs for 110 volts, but it is important to carefully check the product specifications and consult with a professional electrician before purchasing. It is also important to consider the size of the room you will be cooling and other factors such as insulation and outdoor temperature when choosing an air conditioner.
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Ра:
5. Mass of the earth is 6x10-kg and its radius is 6400km. What is the
mass of a man weighting 977N?
(99.99kg)
ma
Orth
be
Answers
Answer:
what do u need help with
Explanation:
Pа: 5. Mass of the earth is 6x10-kg and its radius is 6400km. What is the mass of a man weighting 977N? (99.99kg) ma. Orth be.
Since 1901, global surface temperatures have risen at an average rate of 0.13oF every ten years. In which way could the average increase in global temperatures influence Earth?
Answers
Answer:
The correct answer is "By increasing the amount of flooding because of rising sea levels".
Explanation:
The global temperature chart reflects an approximation across the whole planet's atmosphere. Owing to relatively stable entertain as well as the difficult-to-predict wind but instead, weather patterns structures, the temperature changes we perceive domestically as well as in brief periods could vary dramatically.Doubling the volume of floods due to rising water levels might also significantly affect the ordinary increase in energy consumption on Earth.How was space travel made possible through the invention of transistors?.
Answers
Transistors themselves did not directly enable space travel, their invention revolutionized electronics, paving the way for the development of compact, efficient, and reliable electronic systems that played a vital role in making space travel a reality.
The invention of transistors itself did not directly make space travel possible, but it played a crucial role in the development of the technology that made space travel feasible.
Transistors are fundamental components of electronic devices and are widely used in various fields, including aerospace engineering.
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Draw lines to match the wave terms with the correct description.
Answers
Amplitude - Highest line
Trough - Lowest point
Crest - Distance between top and rest position
Oscillate - Back and forth motion
Amplitude - Distance between top of crest and rest position
Frequency - Number of waves per second
Wavelength - Distance between two crest or troughs
Compression - Where particles are close together
Rarefaction - Where particles are farthest apart
Incident wave - The wave that moves towards an object
Reflected wave - The wave that moves off an object
Superpose - When waves add or cancel out
Reflect - When a wave bounces off an object
What are the terms that describe waves?A wave is a disturbance that travels through a medium, carrying energy from one place to another without the permanent transfer of matter.
The terms that are used to describe a wave are;
Amplitude
Wavelength
Frequency
Period
Velocity
Crest
Trough
Polarization
Interference
Diffraction.
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Tamsin strikes a golf ball so that it flies off with a speed of 60 m/s. The golf ball has a mass of 45 g. Calculate the kinetic energy of the golf ball.
Answers
81 joule is the kinetic energy of the golf ball.
K.E= mv²/2
K.E=0.045×60×60÷2
K.E=81 joule
Kinetic energy is a particular kind of power that is present in moving particles or objects. An object gains kinetic energy when work, which involves the transfer of energy, is done on it by exerting a net force. Kinetic energy is a property of motion that depends on the mass and speed of an object or particle. Motion is any combination of vibration, axis rotation, translation, and movement (along a path from one location to another). A body's translational kinetic energy, which is determined by multiplying its mass, m, by the square of its speed, v, is equal to 1/2mv2.
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1. In a
wave, the particles of the
medium move in the same direction as the
wave motion.
Answers
Answer:
Yes, true
Explanation:
In a wave, especially in longitudinal waves, the particles move in the same direction as the wave is moving which means they are parallel.
a certain lens focuses light from an object 1.35 m away as an image 48.3 cm on the other side of the lens. what is its focal length?
Answers
One lens concentrates light from an object 1.35 m away as an image 48.3 cm away on the other side of the lens at a distance of 1.31 m. An optical system's focal length is a gauge of how powerful it is.
which is the opposite of the optical power of the system, converges or diverges light. A system's focal length is either positive or negative; a positive focal length denotes light convergence. The focal length (f) measures the separation between the lens and the point of focus.
A series of components make up an optical system, including lenses, mirrors, light sources, detectors, projector screens, reflecting prisms, dispersing apparatuses, filters and thin films, and fiber-optic bundles. Are called optical system.
1/f=1/v+1/u
1/f=1/48.3+1/1.35
f=1.31m
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PLEASE HELP ASAP WILL GIVE 10 PTS
Which item is made from a synthetic material?
A. cotton pants
B. leather jacket
C. tissue paper
D. wicker basket
Answers
Answer: A. Cotton Pants
Explanation:
Answer:
A
Explanation:
Which of the following objects has the most inertia
A. A pen
B. A ping pong ball
C. A bowling ball
D. A car