Johanna is studying what happens to the energy as a ball rolls down a ramp. What is one form of energy that she is studying? gravitational potential energy electrical energy chemical energy elastic potential energy
Answers
Answer: gravitational potential energy
Explanation:
Gravitational potential energy is refered to as the potential energy that an object has due to its gravitational field, which in turn is being turned into a kinetic energy when there is a fall of such objects.
Since Johanna is studying what happens to the energy as a ball rolls down a ramp, the form of energy here is the gravitational potential energy.
Answer:
the answer is A
Explanation:
gravitational potential energy
Related Questions
what is the ionization constant at 25c for the weak acid (ch3)2nh2 , the conjugate acid of the weak base (ch3)2nh, kb
Answers
The ionization constant (Ka) at 25°C for the weak acid (CH3)2NH2, the conjugate acid of the weak base (CH3)2NH, is 2.27 x 10^-11.
The ionization constant for a weak acid, Ka, is related to the ionization constant for the conjugate base, Kb, by the equation Ka x Kb = Kw, where Kw is the ion product constant for water (1.0 x 10^-14 at 25°C).
Therefore, to find the ionization constant for the weak acid (CH3)2NH2 at 25°C, we need to first find the ionization constant for its conjugate base, (CH3)2NH, which is given as Kb = 4.4 x 10^-4.
Using the equation Ka x Kb = Kw, we can solve for Ka:
Ka x Kb = Kw
Ka = Kw / Kb
Ka = (1.0 x 10^-14) / (4.4 x 10^-4)
Ka = 2.27 x 10^-11
Therefore, the ionization constant (Ka) at 25°C for the weak acid (CH3)2NH2, the conjugate acid of the weak base (CH3)2NH, is 2.27 x 10^-11.
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What is the speed of a car that
accelerates at a rate of 10 m/s2 for a
total of 25 seconds?
Answers
Answer:
250 m/sExplanation:
The speed of the car can be found by using the formula
v = a × twhere
a is the acceleration
v is the speed
t is the time
From the question we have
v = 10 × 25
We have the final answer as
250 m/sHope this helps you
Which of Galileo's theories drew fire from the Catholic Church and led to his
house arrest?
Answers
Answer:
imma have to come back to you on that one
Answer:
The Sun is at the center of the solar system and the planets move around it.
Explanation:pluto/edmentum
In a calorimetry experiment, it was determined that the heat change of the surroundings (qsurroundings) was 4482 j. what is the heat change of the system (qsystem)?
Answers
The heat of the surroundings is - 4482 J.
What is the heat change of the system (qsystem)?A calorimeter is a device in which that is no exchange of heat between the device and the environment. In other words, there could only be exchange of heat when the a substance has been put inside the calorimeter.
We know that in a calorimeter;
Heat of the surrounding = Heat of the system
That implies that they are of the same magnitude but of opposite direction hence the heat of the system is - 4482 J.
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1. What are the components of vector A?
2. What are the components of vector C?
3. Find a magnitude and direction (the counterclockwise angle with the +x-axis) of a vector that is equal to A + C?
4. Find a magnitude and direction (the counterclockwise angle with the +x-axis) of a vector that is equal to A + B?
Answers
Answer:
The answer is 4
Explanation:
The direction angle—or direction, for short—is the angle the vector forms with the positive direction on the x-axis. The angle θA is measured in the counterclockwise direction from the +x-axis to the vector ((Figure))
Someone give me 3 paragraphs why professional athletes are getting paid too much (language arts)
Answers
Answer: some may argue that while teacher’s only provide service to a single classroom, superstar athletes are entertaining fans all around the world, enticing people with a feeling of relaxation and excitement. Obviously, what these individuals must not be aware of is the most important man in our nation, the president, who makes critical decisions that affect the entire world every day, only makes $400,000 a year. While President Obama is hard at work reviving the economy, the unproven rookie in the MLB is earning way over that figure. Furthermore, police officers, firefighters, and doctors save lives while risking their own for a fraction of what sports stars make. People in the military leave their families at home to defend and protect the country knowing they may never return. It's truly a pity that none of these true heroes are given the same recognition by society as athletes such as Brett Favre or Michael Jordan are given. While I do understand that making it into the pros is not an easy thing to do, and that it takes a tremendous number of hours of hard work and dedication every day to earn a job in professional sports, these people do nothing more than entertain the general public.
Explanation:
Answer:
Wouldn't it be great to make nearly $111 million a year simply to play a game? Tiger Woods, along with many other professional athletes, certainly think so. But do these athletes really deserve all that money?
In my mind, absolutely not. Professional athletes are making too much money in a society where salaries and wages are traditionally based on the value of one's work. In today's society, one should be paid according to the job’s economic importance and their value to society.
Teaching is one of the most economically important occupations because our future economy relies on the education of its youth, yet teachers are paid astronomically less than the average professional athlete is. In fact, each basket Kobe Bryant scores earns him equivalent to the average classroom teacher’s yearly salary.
However, some may argue that while teacher’s only provide service to a single classroom, superstar athletes are entertaining fans all around the world, enticing people with a feeling of relaxation and excitement.
Obviously, what these individuals must not be aware of is the most important man in our nation, the president, who makes critical decisions that affect the entire world every day, only makes $400,000 a year. While President Obama is hard at work reviving the economy, the unproven rookie in the MLB is earning way over that figure.
Furthermore, police officers, firefighters, and doctors save lives while risking their own for a fraction of what sports stars make. People in the military leave their families at home to defend and protect the country knowing they may never return. It's truly a pity that none of these true heroes are given the same recognition by society as athletes such as Brett Favre or Michael Jordan are given.
While I do understand that making it into the pros is not an easy thing to do, and that it takes a tremendous number of hours of hard work and dedication every day to earn a job in professional sports, these people do nothing more than entertain the general public.
Moreover, in my mind, if these athletes want to continue to be rewarded with the fame and fortune that is unfairly bestowed upon them, they must prove to the world that they are going to be positive role models for future athletes, and those who admire them.
Explanation:
found if off some website lol hope it helps! <3
Jeff was struggling with his agggressive behavior. Throughout high school he often found himself in fights. Five years after high school he became an Extreme Sports contender. He channeled his agression and is happily married with a calmer personality outside the ring.
Answers
Any action intended to hurt, harm, or cause suffering to another living thing or group of beings is considered to be aggressive.
What causes harm?Specifically, acts that injure someone physically. action that harms psychological health, such as that which instills apprehension, concern, or anguish.When you hurt your brother, you also hurt him. One way to damage someone is to hurt them physically.
Distress: What is it?People who are distressed could also believe that they are unable to handle or cope with alterations brought on by everyday activities or medical conditions like cancer. It is unfavourable, unhealthy, and discouraging. Stressors events that trigger the stress reaction in our bodies. A stressor is anything that creates stress.
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How long does it take a car to slow down from 52. 0 m/s to 6. 0 m/s if it
accelerates at a rate of -3. 0 m/s^2? *
Answers
According to the information it takes approximately 15.3 seconds for the car to slow down from 52.0 m/s to 6.0 m/s.
How to find the time the car takes to slow down?To find the time it takes for the car to slow down, we can use the kinematic equation:
vf = vi + atWhere:
vf = final velocity (6.0 m/s)vi = initial velocity (52.0 m/s)a = acceleration (-3.0 m/s^2)t = timeRearranging the equation to solve for time, we have:
t = (vf - vi) / aSubstituting the given values:
t = (6.0 m/s - 52.0 m/s) / (-3.0 m/s²)t = (-46.0 m/s) / (-3.0 m/s²)t ≈ 15.3 secondsAccording ot the information we can infer that it takes approximately 15.3 seconds for the car to slow down from 52.0 m/s to 6.0 m/s when it accelerates at a rate of -3.0 m/s².
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Determine the present value of the following single amounts (FV of $1, PV of $1, FVA of $1, PVA of $1, FVAD of $1 and PVAD of $1)
FV= $20,000 I=7% N=10 PV= ?
FV= $14,000 I=8% N=12 PV= ?
FV= $25,000 I=12% N=20 PV= ?
FV= $40,000 I=10% N=8 PV= ?
Answers
The present value of the following single amounts are as follows;
PV for FV = $20,000, I =7%, N =10 years is $10,155.84
PV for FV = $14,000, I =8%, N =12 years is $4,489.92
PV for FV = $25,000, I =12%, N =20 years is $2,590.11
PV for FV = $40,000, I =10%, N =8 years is $18,520.89.
Future value (FV) =$20,000,
Interest rate (I) =7%,Time (n) = 10 years
The present value (PV) can be calculated as follows;
PV = FV / (1 + i)n = 20000 / (1 + 0.07)10PV = 20000 / 1.96715PV = $10,155.84
Future value (FV) =$14,000,
Interest rate (I) =8%,
Time (n) = 12 years
The present value (PV) can be calculated as follows;
PV = FV / (1 + i)n = 14000 / (1 + 0.08)12PV = 14000 / 3.12159PV = $4,489.92
Future value (FV) =$25,000,
Interest rate (I) =12%,Time (n) = 20 years
The present value (PV) can be calculated as follows;
PV = FV / (1 + i)n = 25000 / (1 + 0.12)20PV = 25000 / 9.64632PV = $2,590.11
Future value (FV) =$40,000,Interest rate (I) =10%,Time (n) = 8 years
The present value (PV) can be calculated as follows;
PV = FV / (1 + i)n = 40000 / (1 + 0.1)8PV = 40000 / 2.15893PV = $18,520.89
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a monochromatic light beam is incident on a barium target that has a work function of 2.50 ev. if a potential difference of 1.00 v is required to turn back all the ejected electrons, what is the wavelength of the light beam? 355 nm 497 nm 744 nm 1.42 pm none of those answers
Answers
The wavelength of the light has beam 355 nm.
What is a wavelength?
A wavelength is the measure of a wave's distance from one peak to the next. It is the physical distance between two successive wave crests or troughs, and is usually measured in meters, nanometers, or micrometers. Wavelengths are an important aspect of light, sound, and other types of waves. Wavelengths are often used to describe the properties of these waves such as their color, pitch, and intensity. Wavelengths are also related to the frequency of a wave, with shorter wavelengths associated with higher frequencies and longer wavelengths associated with lower frequencies.
The wavelength of the light beam can be calculated using the equation λ = h/eV, where h is Planck's constant, e is the charge of an electron, and V is the potential difference in volts.
For this question, the wavelength of the light beam is therefore λ = (6.626 x 10-34 Js)/(1.602 x 10-19 C x 1 V) = 4.13 x 10-7 m or 355 nm.
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A cold duck slides down a snow covered hill inclined at an angle of 35° to the horizontal. If the ducks speed is a constant 5m/s, determine the horizontal and vertical components of its velocity.
Answers
Given data:
* The angle of the inclined plane is,
\(\theta=35^{\circ}\)* The speed of the duck along the inclined plane is v = 5 m/s.
Solution:
The diagrammatic representation of the given case is,
From the triangle ABO,
\(\angle ABO=180^{\circ}-\angle AOB-\angle OAB\)Substituting the known values,
\(\begin{gathered} \angle ABO=180^{\circ}-90^{\circ}-35^{\circ} \\ \angle ABO=55^{\circ} \end{gathered}\)Thus, the inclined plane makes an angle of 55 degrees with the negative of the y-axis.
Similarly, the angle of the velocity of the duck along the inclined plane with the negative y-axis is 55 degrees.
Thus, the vertical component of the velocity is,
\(\begin{gathered} v_y=-v\cos (55^{\circ}) \\ v_y=-5\times\cos (55^{\circ}) \\ v_y=-2.88\text{ m/s} \end{gathered}\)The horizontal component of the velocity is,
\(\begin{gathered} v_x=v\sin (55^{\circ}) \\ v_x=5\sin (55^{\circ}) \\ v_x=4.096\text{ m/s} \end{gathered}\)Thus, the horizontal component of velocity is 4.096 meters per second, and the vertical component of velocity is -2.88 meters per second.
The wall of the bulb of a thermometer is made thin why?
Answers
The wall of the bulb of a thermometer is made thin beause allow the heat from sample being measured to reach the liquid quickly for fast response and quick reading (improves the quickness of response by the thermometer). ... — has a vacuum above the liquid column so there is no resistance to the expanding liquid.
A circuit with 0.7 A running through the battery and two 16 Ω resistors in parallel. What is the voltage of the battery?
Answers
Answer:
Below
Explanation:
The two PARALLEL resistors equal: 1 / (1/16 + 1/16) = 8 Ω
V = IR = .7 (8) = 5.6 v
if the train is accelerating and the bisicle is traveling at a constant velocity, what do you know about their speed?
Answers
what is the weight of a 3.67kg ball?
Answers
Answer:
mass 3.67 kg, density 600 kg/m3) is fitted
with lead (density 1.14 * 10^4 kg/m3) so that it floats in water with
0.900 of its volume submerged. Find the lead mass if the lead is fitted
to the block’s (a) top and (b) bottom.
In lab, a radiation detector was used to calculate the background radiation. The
readings taken every minute were recorded in the table below. What is the reason
that the readings are not the same every minute?
Answers
the scores of players on a golf team are shown in the table. the teams combined score was 0 what was travis's score?
Answers
Answer:
what table?
Explanation:
Answer:
-5
Explanation:
two parallel plates of area 0.0248 m^2 have equal and opposite charges of 3.07*10^-10 C placed on them. what is the electric field between the plates
Answers
Answer:
1400
Explanation:
Correct on acellus
Answer:
1400
Explanation:
acellus
Starting from rest, a freely falling object falls 125 meters in?
Answers
Answer:
5.05 sec
Explanation:
h = 1/2gt²
solve for t:
t² = (2h)/g
t = √(2h)/g = √((2)(125 m)) / (9.8 m/s²) = 5.05 s
Find the altitude of the triangle in the figure
below.
50˚
12 m
Answer in units of m.
Answers
9.19m
the altitude of the triangle in the figure below. 50˚ and 12 m
As per figure,
AD is the altitude of the triangle
also AD is perpendicular to BC
so TRIANGLE ABD is a right angled triangle
sin50° = AD/AB = AD/12
AD = 12sin50°
AD = 9.19m
A triangle is said to be right or right-angled if any angle between any two of its sides is 90 degrees or a right angle.One of the most significant geometrical constructions is the right triangle. Base, height, and hypotenuse are the three angles that make up a right triangle. The hypotenuse, or side opposite the right angle, is where the height and base meet at a 90° angle. Since a triangle's interior angles add up to 180 degrees, and one of those angles is 90 degrees, the total of the other two angles must likewise be 90 degrees. The triangle is referred to as an isosceles right triangle if the two angles are equal and 45° each.To know more about right angled triangle visit : https://brainly.com/question/12381687
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an electron is in the plane that bisects a dipole. what is the direction of the electric force on the electron
Answers
The direction of the electric force on the electron in the plane bisecting a dipole is towards the positive charge of the dipole. This is due to the attractive force from the positive charge being stronger than the repulsive force from the negative charge.
Let's define some terms:
- Electron: A negatively charged subatomic particle found outside the nucleus of an atom.
- Dipole: A pair of equal and opposite electric charges or magnetic poles separated by a distance.
- Electric force: The force experienced by a charged object due to the presence of other charged objects.
Understand the dipole setup:
- The dipole consists of a positive charge and a negative charge at a fixed distance apart.
- The plane bisecting the dipole is a plane that cuts the dipole in half, such that the positive and negative charges are equidistant from the plane.
Determine the direction of electric force on the electron:
- In the plane bisecting the dipole, the electron will experience electric forces from both the positive and negative charges of the dipole.
- The force due to the positive charge will attract the electron, while the force due to the negative charge will repel the electron.
- Since the electron is in the plane bisecting the dipole, these forces will act along the same line but in opposite directions.
Analyze the net electric force:
- The net electric force on the electron is the vector sum of the attractive force (due to the positive charge) and the repulsive force (due to the negative charge).
- Since the electron is negatively charged, it will experience a stronger force towards the positive charge and a weaker force away from the negative charge.
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we have two waves of light, a and b. wave a has a higher frequency than wave b. then wave b must have:
Answers
We have two waves of light, a and b. wave a has a higher frequency than wave b. then wave b must have a longer wavelength than a.
What is Wavelength ?Wavelength is a measure of the distance between consecutive peaks (or troughs) of a wave. It is a fundamental property of a wave that determines its character and behavior. In the case of light, wavelength is the distance between consecutive peaks or troughs of the electromagnetic wave, and it determines the color of light.
Longer wavelengths correspond to red light, while shorter wavelengths correspond to blue and violet light. The entire range of visible light spans from violet with the shortest wavelength to red with the longest wavelength.
If wave "a" has a higher frequency than wave "b", then wave "b" must have a lower frequency than wave "a". The frequency of a wave is defined as the number of oscillations or cycles of the wave that occur in a given amount of time, usually measured in Hertz (Hz).
So if wave "a" has a higher frequency than wave "b", this means that wave "a" is oscillating more times in a given period of time than wave "b". This also means that wave "a" has a shorter wavelength than wave "b".
Therefore, We have two waves of light, a and b. wave a has a higher frequency than wave b. then wave b must have a longer wavelength than a.
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what is the main cause of temperature changes in the atmosphere
Answers
Answer:
The main driver of climate change is the greenhouse effect. Some gases in the Earth's atmosphere
Work, Power, and Energy
A 3 kg ball falls from a height of 45 meters to a height of 32 meters. Calculate the amount of work done by gravity.
When writing your answer, please include the formula you used! Thank you!
Answers
Answer:
383.2
Explanation:
W=m×g(9.8)×(change in height)
=3×9.8× (45-32)
=3×9.8×13
=383.2
An electron and a proton are both released from rest, midway between the plates of a charged parallel-plate capacitor. The only force on each of the two particles is the force from the uniform electric field due to the capacitor. Each particle accelerates until striking one of the plates of the capacitor. (There is no gravity in this problem and we ignore the small force between the electron and the proton.) How do the final kinetic energies and final speeds (just before striking a plate) compare
Answers
Answer:
Explanation:
Let the potential difference between the middle point and one of the plate be ΔV .
electric potential energy will be lost and it will be converted into kinetic energy .
Electrical potential energy lost = Vq , where q is charge on charge particle .
For proton
ΔV× q = 1/2 M V² ( kinetic energy of proton )
where M is mass and V be final velocity of proton .
For electron
ΔV× q = 1/2 m v² ( kinetic energy of electron )
where m is mass and v be final velocity of electron . Charges on proton and electron are same in magnitude .
As LHS of both the equation are same , RHS will also be same . That means the kinetic energy of both proton and electron will be same
1/2 M V² = 1/2 m v²
(V / v )² = ( m / M )
(V / v ) = √ ( m / M )
In other words , their velocities are inversely proportional to square root of their masses .
PLEASE HELP!!! GIVING BRAINLIEST!! ill also answer questions that you have posted if you answer this correctly!!!! (80pts)
Answers
Answer:
HOPEFULLY i am correct but i say its D. Hopefully I helped!✨
Answer: It can be A or B
Explanation: In physics, motion is the phenomenon in which an object changes its position over time. Motion is mathematically described in terms of displacement, distance, velocity, acceleration, speed, and time.
Which statement is a description of Charles's law?
The temperature and volume of a gas are directly proportional when pressure is constant.
• The temperatung and volume of a gas are inversely proportional when pressure is constant.
The volume and pressure of a gas are directly proportional when temperature is constant.
O The volume and pressure of a gas are inversely proportional when temperature is constant.
Answers
Answer:
the temperature and volume
the coil of a moving coil galvanometer has 50 turns and its resistance is 10ω. it is replaced by a coil having 100 turns and resistance 50ω . find the factor by which the current and voltage sensitivities change.
Answers
The current sensitivity of the first coil is 0.5 times that of the second coil. The voltage sensitivity of the first coil is 2.5 times that of the second coil.
What is current and voltage sensitivity?Current sensitivity can be determined as how much a galvanometer will deflect on flowing some current through it. Voltage sensitivity can be determined by how much the galvanometer will show deflection when a potential difference is developed across its ends.
Current sensitivity is directly proportional to the number of turns while voltage sensitivity is the ratio of the number of turns of the coil to the resistance.
The number of turns in the first coil, n₁ = 50
The number of turns in the second coil, n₂= 100
The current sensitivity:
\(\frac{CS_1}{CS_2}= \frac{50}{100}\)
C.S₁ = 0.5 C.S₂
The current sensitivity of the first coil is 0.5 times that of the second coil.
Given the resistance of the first coil = 10 ohm
The resistance of the second coil = 50 ohm
The voltage sensitivity of coils:
\(\frac{V.S_1}{V.S_2} =\frac{50/10}{100/50}\)
V.S₁ = 2.5 V.S₂
The voltage sensitivity of the first coil is 2.5 times that of the second coil.
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What is the velocity of an object accelerating at 7.0 m/s² after 4.0s when it is initially moving at 3.0 m/s? Value
Answers
Answer:
31.0 m/s
Explanation:
Given:
\(\vec a=7.0 \ m/s^2\\\\t=4.0 \ s\\\\\vec v_0 = 3.0 \ m/s\)
Find:\(\vec v_f=?? \ m/s\)
\(\boxed{\left\begin{array}{ccc}\text{\underline{The 4 Kinematic Equations:}}\\\\1. \ \vec v_f=\vec v_0+\vec at\\\\2. \ \Delta \vec x=\frac{1}{2}(\vec v_f-\vec v_0)t\\\\3. \ \Delta \vec x=\vec v_0t+\frac{1}{2}\vec at^2\\\\ 4. \ \vec v_f^2=\vec v_0^2+2\vec a \Delta \vec x \end{array}\right}\)
Using the first kinematic equation:
\(\vec v_f=\vec v_0+\vec at\\\\\Longrightarrow \vec v_f=3.0+(7.0)(4.0)\\\\\Longrightarrow \vec v_f=3.0+28.0\\\\\therefore \boxed{\boxed{\vec v_f=31.0 \ m/s}}\)
Thus, the objects final velocity is found.
David is 60 years old, has moderate financial health, a short time horizon, and a low risk tolerance.
Answers
David's investment strategy should reflect his financial goals, time horizon, and risk tolerance.
David is a 60-year-old individual with moderate financial health, meaning he has a stable financial situation but may have some debt or other financial obligations. He has a short time horizon, which suggests he may need his funds in the near future for retirement or other expenses.
He has a low risk tolerance, indicating that he is unwilling to take significant risks with his investments and may prefer safer, more conservative options. Based on these factors, David may want to consider investments that prioritize capital preservation, such as bonds or fixed-income securities. He may also want to work with a financial advisor to create a diversified portfolio that balances his need for stability with potential returns.
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