Answer:
3.75
Explanation:
F= m×a
F=m×(Vf-Vi)/t
10=8×(change in speed)/3
(10×3)÷8=3.75
What describes how the spring constant affects the potential energy of an object for a given displacement from an equilibrium position?
Answer:
The higher the spring constant, the greater the elastic potential energy.
Answer:
ITS C JUST FINISHED
Explanation:
Ken’s community is completely dependent on agriculture for their income. They cultivate and breed domestic species for their food. Ken lives in which society?
A.
hunter-gatherer
B.
modern
C.
primitive
D.
agrarian
Answer:
D. agrarian
Explanation:
The agrarian society is a society that is strictly revolving around the agriculture and animal farming for its survival. In this type of society, the people are only engaged in producing food, be it by planting and raising certain crops or breeding domesticated animals. The main purpose of this type of society is to be able to produce enough food for the whole year, so it is a self maintaining society that consumes as much as it produces. The situation described about Ken is a reflection of this type of society.
Answer: = D. agrarion
Why don’t you fall through the floor
Sarah is measuring the speed of sound through different states of water: water vapor, liquid water, and ice. What should she expect her findings to show? Explain your answer.
Answer: She should find that the speed of sound travels fastest in liquid water. It would travel slowest in water vapor.
In most substances, sound travels faster in solids than it does in liquids.
Water, however, is consisted of hydrogen bonds. These bonds cause water to expand when it is froze. So, water is actually less dense in solid form. In liquid form, water is denser than it is in solid form. Saying that, sound would travel fastest in liquid water because there are more molecules to oscillate and therefore conduct sound. This is all because water is denser in liquid form as opposed to solid form. Therefore, liquid water conducts sound better than solid water or water vapor.
The total power input to the solar cell is 2.4W when the efficiency is 0.20.
Calculate the useful power output of the solar cell using the following equation:
The useful power output of the solar cell using the following equation will be 0.48 W. Power rating is an efficiency perameter.
What is the power rating?The maximum power input allowed to pass through a piece of equipment is known as the equipment's power rating.
The power rating or the efficiency is found as;
[tex]\rm \eta = \frac{P_{OUT}}{P_{IN}} \\\\ P_{OUT}}= \eta \times {P_{IN} \\\\[/tex]
[tex]\rm P_{OUT}= 0.20 \times 2.4 \\\\ P_{OUT}= 0.48 \ W[/tex]
Hence, the useful power output of the solar cell will be 0.48 W
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When sunlight reflects from a horizontal surface horizontally polarized light reflects more strongly than the rest of the sunlight. This reflection produces?
An image
A mirage
Scattering
Glare
Answer:
The answer is Glare
Explanation:
When sunlight reflects from a horizontal surface, horizontally polarized light reflects more strongly than the rest of the sunlight. This reflection produces glare. To block the glare, polarized sunglasses have vertically polarized filters, which block the horizontally polarized light.
what is the deceleration of a bicycle that goes from 40m/s to 20m/s in 5 seconds
Answer:
[tex]-4 m/s^2[/tex]
Explanation:
The acceleration of the bycicle is given by:
[tex]a=\frac{v-u}{t}[/tex]
where
v = 20 m/s is the final velocity of the bike
u = 40 m/s is the initial velocity
t = 5 s is the time interval
Substituting numbers, we find
[tex]a=\frac{20 m/s-40 m/s}{5s}=-4 m/s^2[/tex]
and the acceleration is negative, which means that the bycicle is slowing down.
Oil ________.
A. Is a renewable resource
B. Releases more toxins than coal
C. Must mined from underground
D. Can be replenished
Oil must be mined from underground.
Look at the figure above. Which position of the earth represents an equinox?
A. End of summer
B. Beginning of winter
C. Beginning of autumn
D. Middle of spring
'A' and 'C' are the same point in time. When Summer ends, Autumn begins. An equinox occurs at that time.
The position of the Earth represents an equinox are A and C.
What is an equinox?Equinox means both of the twice every year (as about March 21 and September 23) when the Sun crosses the equator and day in and day out are wherever on earth of around equivalent length.
The end of summer and the beginning of autumn occurs at the same point in time. When Summer ends, Autumn starts. An equinox occurs at this time.
Thus, the correct option are A and C.
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which phrases describe this plate boundary? check all that apply.
•may occur in oceans
•may form rift valleys
•is a type of transform boundary
•is a region where earthquakes occur
Answer:
A region where all earthquakes occur
Explanation:
Answer: Option (3)
Explanation: In the given image, the plate boundary that is being shown is a transform plate boundary, in which the two plates are moving, slide passing one another. Here neither plate destroys nor creates. For example, The San Andres fault.
The areas that are included in this transform plate boundary are very prone to earthquakes and tsunamis. Earthquake generates when the plates rubs one another, releasing energy that causes seismic waves to propagates. This causes an earthquake of varying intensity.
Thus, the correct answer is option (3).
1. How does potential energy differ from kinetic energy?
Answer:
Read Below for answer
Explanation:
Kinetic energy is the kind of energy present in a body due to the property of its motion
Potential Energy is the type of energy present in a body due to the property of its state
Final answer:
Potential energy is stored energy due to position or state, able to have both positive and negative values, while kinetic energy, always positive, refers to the energy of motion. Energy can transition between these two states, and kinetic energy correlates directly with the speed of an object.
Explanation:
Potential energy differs from kinetic energy in that it represents the energy stored within an object due to its position or state, whereas kinetic energy is the energy of motion. An essential distinction between potential energy and kinetic energy is that potential energy can have a negative value when it implies a release of stored energy, leading to it being lower than the initial state.
Conversely, kinetic energy is always a positive value because it is directly correlated with motion—it increases as the speed of the object increases.
An example of potential energy is a stretched bow, whereas a revolving wheel illustrates kinetic energy. Energy can transition between potential and kinetic; for instance, when a ball reaches the peak of its bounce and begins to fall, its potential energy converts to kinetic energy.
The different types of potential energy, such as elastic, gravitational, and chemical, have unique sources and characteristics but share the common feature of being stored energy that can be converted to kinetic energy under the right circumstances.
Starting from rest, the distance a freely-falling object will fall in 0.50 second is?
Answer:
1.23 m
Explanation:
The vertical distance covered by a free-falling object starting from rest in a time t is
[tex]y=\frac{1}{2}gt^2[/tex]
where
g = 9.8 m/s^2 is the acceleration due to gravity
In this problem, we have
t = 0.50 s
So the distance covered is
[tex]y=\frac{1}{2}(9.8 m/s^2)(0.50 s)^2=1.23 m[/tex]
the reason lines on the bottom of a swimming pool can look wavy when seen from above is that
Answer:
it is under water
Explanation:
Lines on the bottom of a swimming pool look wavy from above due to refraction, the bending of light as it moves from water to air. Reflection can also distort underwater images. The apparent shortening of waded legs in water is similarly caused by light refraction.
The reason lines on the bottom of a swimming pool can look wavy when viewed from above is due to the optical phenomenon known as refraction. When light passes from one medium to another, for instance, from water to air, it changes speed and is bent at the boundary between the two mediums. This bending of light rays can make straight lines on the pool bottom appear distorted or wavy to an observer looking from above the water.
As described in the reference, the image of a swimmer or other objects can look different because of both reflection and refraction. Total internal reflection can cause images to be reflected back into the water, while refraction at the water's surface can make the bottom of the pool look shallower than it truly is. The illustrated example of how objects can change position and shape due to wave motion further underlines the role of water's dynamic surface in distorting underwater images.
In addition, the phenomenon that makes a person's legs appear very short when wading in a pool is also explained by the refraction of light. A ray diagram would illustrate how light from the feet travels through water, bends as it exits the water, and then reaches the observer's eyes, causing a visual distortion of the legs' length and position in the water.
What would happen if the producer population were wiped out completely?
A First level consumers would obtain energy from second level consumers.
B There would be no energy available for consumers.
C First level consumers would increase in number
D There would be more energy available for consumers.
Answer:
B. There would be no energy available for consumers
Explanation:
The producers are the basis and foundation of all ecosystems. If something dramatic happens to the populations of producers and they are wiped out, then the ecosystems will crumble and nothing will be left of them. The reason for this is that the producers are the ones that produce the energy, and they are the ones that are the food source, thus energy source for the consumers. Once they are gone, the organisms that consumed the producers will starve to death. The predators will have lot of food from the dying prey, but that will only last for a couple of weeks, and after that they will starve to death as there will be no more food left for them.
( Image is 6 C carbon with the numbers 12.011 under it ) According to the image, the atomic mass of carbon is 12.011. How is the atomic mass of carbon, or any other element, determined? A. By adding the number of protons and the number of electrons B. By adding the number of protons and the number of neutrons C. By adding the number of protons, the number of neutrons, and the number of electrons D. By identifying the number of protons
Answer:
B. By adding the number of protons and the number of neutrons
Explanation:
The atomic mass is determined by adding the number of protons and neutrons in an atom. An atom is made up of three fundamental particles: Electrons, Protons and Neutrons.
The protons and neutrons occupy a central region in an atom known as the nucleus. The nucleus is positively charged and mass concentrated.
If we compare the relative masses of the subatomic particles, the masses of protons and neutrons would be 1 and that of an electron would be 1/1840. This shows that the mass of electrons are negligible.
In order to ascertain atomic mass, we therefore add the number of protons and neutrons together. This is how we arrive at 12.011 as the value of the atomic mass of C and for other elements.
The atomic mass is also known as the mass number.
The atomic mass of an element including carbon is determined by adding the number of protons and neutrons in its most common atomic form. Electrons do not appreciably contribute to the atomic mass due to their extremely small mass.
Explanation:The atomic mass of carbon, as presented in the image, is 12.011. This is determined by the sum of the number of protons and neutrons in most common form of an atom of an element. For example the most common isotope of carbon, Carbon-12, has six protons and six neutrons for a total of 12 subatomic particles in its nucleus. This means the mass number of Carbon-12 is 12.
Note that electrons, while they are part of the atom, do not appreciably contribute to the mass of an atom because their mass is exceedingly small. Thus, in response to the question the atomic mass of an element is determined by B 'By adding the number of protons and the number of neutrons' .
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What is an anion? Is it an ion?
Answer:
Yes, an Anion is an ionic species, which has a negative charge.
Explanation:
Hope my answer has helped you!
Sound waves are mechanical waves. Which statement is true for this type of wave?
Answer:
Electromagnetic waves do not require a medium in order to transport their energy. Mechanical waves are waves that require a medium in order to transport their energy from one location to another. ... Sound is a mechanical wave and cannot travel through a vacuum.
Sound waves are mechanical waves that require a medium to travel through, and consist of longitudinal pressure waves, exhibiting features like frequency which determines pitch. They transfer energy, not mass, and the speed of sound depends on the medium's properties.
Explanation:Sound waves are mechanical waves, which means they require a medium, such as air, water, or solid materials, to transmit energy. Unlike electromagnetic waves, mechanical waves cannot travel through a vacuum; they need a physical medium to propagate. Sound waves, specifically, are longitudinal pressure waves which means they consist of compressions and rarefactions in the medium. Within these waves, energy is transferred from one location to another, but not mass itself. The speed at which sound waves travel depends on the physical properties of the medium they move through.
Additionally, sound waves have characteristics like amplitude, wavelength, period, and frequency. Frequency is particularly significant as it determines the pitch of the sound; higher frequencies result in higher pitches, while lower frequencies result in lower pitches. The frequency of sound is measured in hertz (Hz), which represents the number of waves that pass a point per unit of time. Humans typically hear frequencies between 20 and 20,000 Hz, and this range decreases with age. Animals, however, can perceive higher frequencies than humans, such as dogs hearing up to about 40,000 Hz and dolphins up to 150,000 Hz.
Explain the difference between rotation and revolution.
Answer:
When an object turns around an internal axis (like the Earth turns around its axis) it is called a rotation. When an object circles an external axis (like the Earth circles the sun) it is called a revolution.
Rotation: Earth’s rotation is why we have day and night (it turns on its axis)
Revolution: Earth’s revolution is what we base our years after (the Earth revolving around the sun)
Identify the part of a wave shown here
IMAGE BELOW
The bottom of this wave is called the Trough.
Select all the correct answers.
According to Newton’s law of universal gravitation, which statements are true?
As we move to higher altitudes, the force of gravity on us decreases.
As we move to higher altitudes, the force of gravity on us increases.
As we gain mass, the force of gravity on us decreases.
As we gain mass, the force of gravity on us increases.
As we move faster, the force of gravity on us increases.
Reset Next
According to the law of gravitation given by Newton, higher the altitudes, less the force of gravity experienced.
Answer: Option A.
Explanation:
The law of gravitation given by Newton, said that the gravity force is experienced more when close to the Earth. Therefore, increase in altitude, means that the individual or the object has gone much above the sea floor, and as the distance increases the force decreases. The force of gravitation is “inversely proportional to distance”.
According to Newton’s law of universal gravitation, the statements which are true are "As we move to higher altitudes, the force of gravity on us decreases "and "As we gain mass, the force of gravity on us decreases".
Newton’s law of universal gravitation:
According to this law, every particle of matter is said to pull towards every other particle with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers.
It can be expressed as:
F = (G × m1 × m2) / r²
F: gravitational force between two objects,
G: gravitational constant
m1 and m2: masses of the two objects
r: distance between the centers of the two objects.
The force of gravity weakens with increasing distance from the center of the Earth. As we move to higher altitudes, the distance between us and the Earth's center increases, resulting in a decrease in the force of gravity.The force of gravity is directly proportional to the mass of the objects involved. Therefore, by gaining mass, the force of gravity between us and other massive objects increases.Therefore, the correct statements are: As we move to higher altitudes, the force of gravity on us decreases "and "As we gain mass, the force of gravity on us decreases".
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Around how many miles is a light year
Answer:
5,878,625,373,183.6 miles
Water moves to the top of tall trees because of _____.
capillary action
surface tension
capillary action and evaporation
vapor pressure
Answer:
capillary action and evaporation
Explanation:
The pulling effect of evaporating water from the leaves and other parts of plants provides the driving mechanism for water to reach greater parts in a plant. Evaporation of water during a hot day would cause water to rise through conduit-like pipes in plants which leads to rise of water from the root to areas that lacks them.
This process is even made much more easier by capillary action which is the unaided movement of water or fluid in a narrow tube as a result of its own pressure. Evaporation would facilitate the process of capillary action and together, they both drive water to greater reaches of plants from the root.
I lean against a wall, applying force. Which could be described as the “reaction force?”
A. My force against the wall
B. The walls force against me
C. The force of gravity
D. No reaction
E. Not enough information
The answer is B The Wall Force Against Me
Which choice correctly ranks these items from smallest to largest?
carbon atom
comma
E. coli bacteria cell
electron
quantum dot
electron - carbon atom - quantum dot - E. coli bacteria cell comma
comma - carbon atom - E. coli bacteria cell - quantum dot - electron
carbon atom - electron - E. coli bacteria cell - quantum dot comma
electron - carbon atom -- comma - E. coli bacteria cell - quantum dot
Answer:
your answer is: electron → carbon atom → quantum dot → E. coli bacteria cell → comma
Explanation:
Answer:
A.
Explanation:
Edge 2021
Help please? Thanksssss
Answer:
250 N
Explanation:
The acceleration of the 50 kg cart under 750 N of force is:
F = ma
750 N = (50 kg) a
a = 15 m/s²
To accelerate from 13 m/s to 17 m/s takes:
v = at + v₀
17 m/s = (15 m/s²)t + 13 m/s
t = 4/15 s
To accelerate in 3 times as many seconds (t = 4/5 s):
17 m/s = a (4/5 s) + 13 m/s
a = 5 m/s²
So the force is:
F = ma
F = (50 kg) (5 m/s²)
F = 250 N
You could also have reasoned this without the calculations. 3 times the time means 1/3 the acceleration which means 1/3 the force.
HELP ASAP! GIVING BRAINLIEST!!
How could you give a pendulum more energy?
Answer:
swinging it with more force
Explanation:
swinging it hardly with more energy
Answer: You have to push it.
Explanation: Since you are pushing the pendulum, the energy from your hand transfers to the pendulum and the pendulum gains more kinetic energy. If you are writing an essay, change this a bit so you won't be caught plagiarizing. Please give a brainliest so I can continue giving answers like this.
A copper sphere was moving at 25 m/s when it hit another object. This caused all of the KE to be converted into thermal energy for the copper sphere. If the specific heat capacity of copper is 387 J/(kg ⋅ C°), what was the increase in temperature?
0.23 C°
0.81 C°
1.3 C°
2.1 C°
Answer:
[tex]\Delta T = 0.81 ^oC[/tex]
Explanation:
As we know by energy conservation
All its kinetic energy will convert into thermal energy to raise its temperature
[tex]\frac{1}{2}mv^2 = ms\Delta T[/tex]
now divide both sides by mass of the object
[tex]\frac{1}{2}v^2 = s\Delta T[/tex]
so change in temperature is given as
[tex]\Delta T = \frac{v^2}{2s}[/tex]
[tex]\Delta T = \frac{25^2}{2\times 387}[/tex]
[tex]\Delta T = 0.81^oC[/tex]
To calculate the increase in temperature for the copper sphere, one needs to equate its kinetic energy to the heat gained by the copper and solve for the temperature increase using the copper's specific heat capacity. Without knowing the mass of the sphere, the calculation cannot be completed.
Explanation:Understanding the Increase in Temperature of a Copper Sphere
When a copper sphere moving at 25 m/s hits another object and all its kinetic energy (KE) is converted into thermal energy, the increase in temperature can be calculated using the equation for kinetic energy and the formula for heat transfer involving specific heat capacity:
KE = ½ * m * v2
Where m is the mass of the sphere and v is the velocity. Once the kinetic energy is known, his is linked to the thermal energy (ΔQ) gained by the copper sphere:
ΔQ = m * c * ΔT
Here, c is the specific heat capacity of copper, and ΔT is the temperature increase we need to find. Given that the entire KE is converted to thermal energy, we set ΔQ equal to KE and solve for ΔT, which directly gives us the increase in temperature of the copper sphere.
Without the mass of the copper sphere, we cannot determine the exact temperature increase from the information provided. However, if we have the mass, we can use the above equations to find the numerical value of the increase in temperature.
Kendall does 30 Newton-meters of work pushing her sofa halfway across the living room. Her living room is 10 meters
long. How much force did Kendal use?
30 Newtons
10 Newtons
3 Newtons
unknown
Answer:
3 Newtons
Explanation:
The work done by Kendall is given by:
[tex]W=Fd[/tex]
where
F is the force
d is the displacement of the sofa
In this problem, we know
W = 30 Nm = 30 J
d = 10 m
So we can solve the formula for F to find the force used by Kendal:
[tex]F=\frac{W}{d}=\frac{30 J}{10 m}=3 N[/tex]
Final answer:
To find the force Kendall used to push her sofa, we divide the work done (30 Nm) by the distance (5 m), which equals 6 Newtons. However, since this answer is not among the options, the force Kendal used is unknown.
Explanation:
The question asks how much force Kendall used to push her sofa halfway across her living room when she did 30 Newton-meters of work. Since work equals force times distance (Work = Force x Distance), we can rearrange the formula to solve for force (Force = Work / Distance). In this case, Kendall pushed the sofa 5 meters (halfway across a 10-meter room), so the force she exerted can be calculated as follows:
Force = Work / Distance
Force = 30 Nm / 5 m
Force = 6 Newtons
However, this value does not match any of the options provided in the question. Therefore, based on the given answer choices, the force Kendal used is unknown.
Please Help!! 50 points!
Answer first question then the question for the 2nd one " name the first 8 planets in order.
Thank you so much!
Answer:
2.Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune
Explanation:
1. I do not understand what is being asked.
If you could comment with more understandable question ill do my best to help. (:
Answer:
Star y is closer
Explanation:
The brighter the star appears the closer it is to the earth. That is why the sun seems like the biggest and brightest star but in reality it is just closer than other stars.
Mercury, venus, earth, Mars, Jupiter, Saturn, Uranus, and Neptune
How much potential energy does a 20-kg barrel have when it is in the truck whose floor is 5.0 m above the ground? P.E. = J
Answer:
980J
Explanation: