Which person has the most kinetic energy?
O A. A person sitting in a chair
OB. A person sitting at the top of a slide
O C. A person riding a bicycle
O D. A person walking
Answers
A person riding a bicycle has the most kinetic energy among the given options, therefore the correct option is C.
What is mechanical energy?Mechanical energy is the combination of all the energy in motion represented by total kinetic energy and the total stored energy in the system which is represented by total potential energy.
The expression for total mechanical energy is as follows
ME= PE+KE
Where ME is the mechanical energy
PE is the total potential energy
KE is the total kinetic energy
The kinetic energy is the body depends on the mass as well as the speed of the object and is given by the mathematical expression as follows
K.E = 1/2*m*v²
where K.E is the kinetic energy of the object
m is the mass of the object
v is the velocity of the object
For the given problem and the options provided for the person riding the bicycle has the most kinetic energy among all, therefore the correct option is C.
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Related Questions
A 1.70 m long string has a standing wave with 2 loops at a frequency of 38.4 Hz. What is the speed of the waves in the string? (Unit = m/s)
Answers
Answer:65.28
Explanation:
A long string has a standing wave with 2 loops at a frequency. The speed of the waves in the string is 65.28 m/s
What is frequency?The frequency is the number of cycles completed per second.
Given the length of the string l = is 1.70 m, no of loops n =2, frequency of wave f =38.4 Hz, then the speed of the waves is
f = nv /2l
Substitute the following values, we get
v = 38.4 x 2 x 1.70 / 2
v =65.28 m/s
Thus, the speed of the waves in the string is 65.28 m/s.
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Internal injuries can include which of the following? HELP ASAP (EDG ANATOMY 2020)
fractured rib
neck sprain
contusion
ear avulsion
ruptured organ
torn tendon
cheek laceration
Answers
Answer: fractured rib, neck sprain, ruptured organ, torn tendon
Explanation: I just did it
Answer:
fractured rib
neck sprain
ruptured organ
torn tendon
Explanation:
edge - got 100%
A mass-spring system can oscillate once every 2.5s when a 750 grammass is attached to it. What must the spring constant be to allow thisvibrational period?
Answers
Answer:
4.737 N/m
Explanation:
The period of a mass-spring system is calculated as
\(T=2\pi\sqrt{\frac{m}{k}}\)Where m is the mass and k is the spring constant. Solving for k, we get
\(\begin{gathered} \frac{T}{2\pi}=\sqrt{\frac{m}{k}} \\ \\ (\frac{T}{2\pi})^2=\frac{m}{k} \\ \\ \frac{T^2}{4\pi^2}\cdot k=m \\ \\ T^2\cdot k=m(4\pi^2) \\ \\ k=\frac{m(4\pi^2)}{T^2} \end{gathered}\)Then, replacing m = 750 g = 0.75 kg and T = 2.5s, we get:
\(k=\frac{0.75\text{ kg }\cdot4\cdot\pi^2}{(2.5\text{ s\rparen}^2}=4.737\text{ N/m}\)Therefore, the spring constant must be 4.737 N/m
Place the types of radiation in order of INCREASING mass.
Answers
Answer & explanation:
Gamma Radiation (γ): Also called gamma rays. Gamma radiation is made of electromagnetic waves, has zero charge and mass, continuously emits heat and has the ability to ionize air and make it conductive of electric current. Beta radiation (β): Beta rays or beta particles, are electrons, negative particles with charge - 1 and mass number 0.Alpha radiation (α): Also called alpha particles or alpha rays, are particles charged by two protons and two neutrons. They have positive charge +2 and mass number 4.A toy car sits motionless at the top of a ramp. What will happen to the car if a balanced force acts upon it?
Answers
Answer:
kinetic energy because when the car moves again it will be faster then it was before
Help 100 points ixl! Need it due in 10 minutes!
Answers
She travelled in one third of time=160km
Total distance=160×3=480km
Time=6h
\(\\ \bull\tt\dashrightarrow Velocity=\dfrac{Displacement}{Time}\)
\(\\ \bull\tt\dashrightarrow Velocity=\dfrac{480}{6}\)
\(\\ \bull\tt\dashrightarrow Velocity=80km/h\)
Answer: 160km
Explanation:
A speaker produces 1\text{W}1W of acoustical power. If the speaker projects sound uniformly in all directions, at what distance from the speaker will the loudness of the sound be 84.0 dB
Answers
If it projects sound uniformly in all directions, the loudness of the sound produced by the speaker will be 84.0 dB at a distance of approximately 158.5 meters from the speaker.
The loudness of a sound is determined by its intensity level, which is measured in decibels (dB). The intensity level is directly proportional to the logarithm of the power of the sound wave. In this case, the speaker produces 1W of acoustical power, which is equivalent to 0 dB.
To determine the distance at which the loudness of the sound will be 84.0 dB, we need to use the inverse square law, which states that the intensity of sound decreases as the square of the distance from the source.
Let's assume that the speaker projects sound uniformly in all directions. At a distance of 1 meter from the speaker, the intensity level will be:
IL1 = IL0 - 20 log (d1/d0)
IL1 = 0 dB - 20 log (1/1)
IL1 = 0 dB
At a distance of x meters from the speaker, the intensity level will be:
ILx = IL0 - 20 log (dx/d0)
We need to solve for x when ILx = 84.0 dB:
84.0 dB = 0 dB - 20 log (x/1)
4.2 = log (x/1)
x/1 = 10^4.2
x = 158.5 meters
Therefore, the loudness of the sound produced by the speaker will be 84.0 dB at a distance of approximately 158.5 meters from the speaker if it projects sound uniformly in all directions.
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You are sitting in a room doing the Phys 230 final exam. Although you may not have noticed, which of the following electromagnetic waves could be around you? (a) Radio Waves and Microwaves (b) Infrared waves and Visible light (c) Ultraviolet light and Gamma rays (d) All of above (e) None of above
Answers
The correct option is (d) All of the above.
Electromagnetic waves span a wide range of frequencies and wavelengths, and all of the options listed consist of different types of electromagnetic waves. Radio waves, microwaves, infrared waves, visible light, ultraviolet light, and gamma rays are all part of the electromagnetic spectrum, each with its own unique properties and applications. Therefore, it is possible that all of these waves could be present in the room during the Phys 230 final exam.
(a) Radio Waves and Microwaves:
- Radio waves have long wavelengths and low frequencies, typically used for communication purposes, such as radio broadcasting and telecommunications.
- Microwaves have shorter wavelengths and higher frequencies than radio waves. They are commonly used for cooking (microwaves in ovens), wireless communication (Wi-Fi), and radar systems.
(b) Infrared Waves and Visible Light:
- Infrared waves have longer wavelengths and lower frequencies than visible light. They are often associated with heat and are used in various applications such as thermal imaging, remote controls, and certain types of communication.
- Visible light is the portion of the electromagnetic spectrum that is visible to the human eye. It consists of different colors with varying wavelengths and frequencies, ranging from red (longer wavelengths) to violet (shorter wavelengths).
(c) Ultraviolet Light and Gamma Rays:
- Ultraviolet (UV) light has shorter wavelengths and higher frequencies than visible light. It is emitted by the sun and can cause effects such as sunburn and tanning. UV light also has various applications, including sterilization, fluorescence, and some types of medical treatments.
- Gamma rays have the shortest wavelengths and highest frequencies in the electromagnetic spectrum. They are highly energetic and can penetrate through matter easily. Gamma rays are emitted by radioactive materials and nuclear reactions and are used in medical imaging and cancer treatments.
Remember, electromagnetic waves are all around us, and different types have different applications and properties.
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A man is driving through his neighborhood
when a boy on a bike comes out of a driveway.
The driver skids to a stop in an attempt to avoid
hitting the biker, but ends up knocking the boy
off of his bike. The biker has minor injuries and
his parents file a lawsuit against the driver,
claiming that the car was going over the speed
limit at the time. The drag of the road is 0. 75
Answers
You might need to slow down because, generally speaking, a bicycle moves more slowly than other vehicles.
What sort of vehicle can a driver encounter on a slow-moving road? You might need to slow down because, generally speaking, a bicycle moves more slowly than other vehicles.Before overtaking a bicycle in a lane that is too small to share, wait until there is a clear section of the road.Before opening your automobile door into a traffic lane or a cycling lane, look out for passing bicycles.I'd like to outline three fundamental ideas that, in my opinion, form the basis of this skill set, despite the fact that defensive and professional driving entail many specific techniques:1) fault vs. avoidability; 2) following distance; and 3) detachment from other driversYour following distance should be extended.The interior and outside mirrors, as well as a head check, can be used to assess the mirror blind spots by the driver.
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This is primarily in reference to the "Seasons and Earth-sun relationship" video (view around 3:52) as well as the first half of the readings: a) Why does the equator receive equal day and night (12 hours each) regardless of the day of the year? Mention the circle of illumination. b) On December 22nd, within which range of latitudes is 24 hours of day-light experienced? Why?
Answers
a) Answer: On the equator, the Circle of Illumination divides the earth into two equal parts, with each part receiving 12 hours of daylight and 12 hours of darkness.
The equator receives an equal day and night (12 hours each) regardless of the day of the year due to the Circle of Illumination, which is a line that separates the day side of the earth from the night side of the earth. The Circle of Illumination separates the sunlit and dark sides of the earth. The earth's axis is at a 23.5-degree angle to the plane of its orbit around the sun, causing different latitudes to receive different amounts of sunlight throughout the year. On the equator, the Circle of Illumination divides the earth into two equal parts, with each part receiving 12 hours of daylight and 12 hours of darkness.
b) Answer: The earth's axis is tilted at 23.5°, and during the December solstice, the North Pole is tilted away from the sun, causing the Arctic Circle and areas beyond it to experience a full day of daylight because the sun is above the horizon for 24 hours.
On December 22nd, between the latitudes of the Tropic of Cancer (23.5°N) and the Arctic Circle (66.5°N), 24 hours of daylight is experienced. This occurs because the earth's axis is tilted at 23.5°, and during the December solstice, the North Pole is tilted away from the sun, causing the Arctic Circle and areas beyond it to experience a full day of daylight because the sun is above the horizon for 24 hours.
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2. Which of the outer planets is MOST like Earth? How?
Answers
Answer:
uranis
Explanation:
Answer:
Saturn
Explanation:
Saturn is most like earth because it has moons and the atmosphere is denser like Earth.
How does the Samsung Galaxy Z Fold 4 impact human life at work, in travel, and the game?
If Samsung Galaxy Z Fold 4 is a commanding device, how can you change it to a disposable device?
How does the Samsung Galaxy Book Pro 360 laptop impact human life at work, in travel, and the game?
If Samsung Galaxy Book Pro 360 is a commanding device, how can you change it to a disposable device?
Answers
When your phone is halfway folded, Flex Mode enables apps to realign themselves to match the screen so you can use one half of the screen to view a video and the other half to browse (see image above). Simply hold down an empty spot on your home screen and tap the + sign to create more home screens.
To access your various home screens, swipe right and left, then tap the one you want to use right now. Your most-used business and personal apps can have their own spaces thanks to this strategy. It includes one of Intel's latest P-series CPUs for ultraportable computers, the 13th-Gen i7-1360P. Given that there is no dedicated GPU, it is not the best laptop for gaming.
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Name the following ionic compounds: BeCl2
Answers
Answer:
Beryllium chloride
Explanation:
I hope this helps!
Can I get branliest?!
List the benefits of studying rocks and fossils?
Answers
Por que la papa criolla se cocina mas rápido que la papa agria?
Answers
Answer:
huh english plssss bc I didn't understand
The moment the skateboard starts moving (after skateboarder pushes it). Which of Newton's laws is most relevant to this action?
Answers
Answer:
The law of gravity
Explanation:
Within 4. 0 s of liftoff, a spacecraft that is uniformly
accelerating straight upward from rest reaches an altitude
of 4. 50 X 102 m [up).
(a) What is the spacecraft's acceleration?
Answers
The spacecraft's acceleration can be found using the equation: a = (v-u)/t = 4.50 x 10^2 m / 4.0 s = 11.25 m/s^2.
Can you explain the concept of uniformly accelerating motion?Uniformly accelerating motion refers to an object that is moving at a constant rate of acceleration. This means that the velocity of the object is changing at a constant rate, but the acceleration remains the same throughout the motion. An example of this type of motion is an object that is accelerating from rest at a constant rate. The motion of the object can be described mathematically by the equations of motion, such as distance = initial velocity * time + 1/2 * acceleration * time^2. The graph of uniformly accelerating motion is a parabola, with velocity on the y-axis and time on the x-axis. This type of motion is different from non-uniform acceleration, where the acceleration changes during the motion.
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A spacecraft that is uniformly accelerating straight upward from rest reaches an altitude of 4. 50 X 102 m [up) with acceleration of 11.25 m/s².
Evaluating :The spacecraft's acceleration can be found using the equation:
a = (v-u)/t
= 4.50 x 10² m / 4.0 s
= 11.25 m/s².
Uniformly accelerating motion :Uniformly accelerating motion refers to an object that is moving at a constant rate of acceleration. This means that the velocity of the object is changing at a constant rate, but the acceleration remains the same throughout the motion. An example of this type of motion is an object that is accelerating from rest at a constant rate.
The motion of the object can be described mathematically by the equations of motion, such as distance = initial velocity × time + 1/2 * acceleration × time². The graph of uniformly accelerating motion is a parabola, with velocity on the y-axis and time on the x-axis. This type of motion is different from non-uniform acceleration, where the acceleration changes during the motion.
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Determine the internal resistance of the capacitor.
Answers
Answer:
The equivalent series resistance of a capacitor is the internal resistance that appears in series with the capacitance of the device. Almost all capacitors exhibit this property at varying degrees depending on the construction, dielectric materials, quality, and reliability of the capacitor.
Explanation:
Hope this helps
What class lever is a
1.Pencil Sharpener
2.Tennis racket
3. Hole puncher
4. Can opener
Answers
should be 1
Explanation:
because what do you use in class and has a lever
Two spheres A and B are placed in the arrangement shown below.
(a) If mA = 2m and mB = 7m, where on the dashed line should a third sphere C of mass 7m be placed so that the net force on it is zero? (Select 1)
-between A and B, closer to B
-at the midpoint between A and B
-to the left of B
-to the right of A
-between A and B, closer to A
(b) If the distance between the two spheres A and B is 500 cm, find the location for the third sphere C so that the net force on it is zero.
Answers
a. The third sphere must be placed between A and B, closer to A.
b. the third sphere must be placed at 175 cm from the first sphere.
a. If mA = 2m and mB = 7m, where on the dashed line should a third sphere C of mass 7m be placed so that the net force on it is zero?
Since
mA = 2 kg,mB = 7 kg and mC = 7kg,Using Newton's law of universal gravitation, the net force on the first sphere on the third sphere is F = mAmC/x² where x = distance between sphere C and A
Also, the Force of attraction between there second sphere and the third sphere is F' = mBmC/(R - x)² where R = distance between mA and mB and x = distance between mA and mC.
Since the net force must be zero, then
F = F'
mAmC/x² = mBmC/(R - x)²
So, (R - x)²/x² = mB/mC/mAmC
(R - x)²/x² = mB/mA
Substituting the values of mA and mB into the equation, we have
(R - x)²/x² = 7/2
(R - x)²/x² = 3.5
(R - x)/x = √3.5
(R - x)/x = 1.87
R - x = 1.87x
R = x + 1.87x
R = 2.87x
x = R/2.87
x = 0.35R
Since x = 0.35R, the third sphere must be placed between A and B, closer to A.
b. If the distance between the two spheres A and B is 500 cm, find the location for the third sphere C so that the net force on it is zero.Since the position of the third sphere is
x = 0.35R and R = 500 cmSo, x = 0.35 × 500 cm
x = 175 cm
So, the third sphere must be placed at 175 cm from the first sphere.
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A force of 2700 N is exerted on a car by a tow truck. The car accelerated at a rate 1.63 m/s? What is the mass of the car?
Round the the 2nd decimal places!
Answers
Answer:
1656.44 kgExplanation:
The mass of the car can be found by using the formula
\(m = \frac{f}{a} \\ \)
f is the force
a is the acceleration
From the question we have
\(m = \frac{2700}{1.63} \\ = 1656.4417...\)
We have the final answer as
1656.44 kgHope this helps you
can yall answer this? (for class) whats the diffrentce between drug addict and acoholic?
Answers
Answer:none
Explanation:
Protons have a _____ charge and are held together by ______.
Answers
By definition, protons are charged particle with positive charge. Protons are held toguether at the atomic nuclues do the strong nuclear force.
Then, you have:
Protons have a positive charge and are held toguether by the strong nuclear force.
how does fabric softener help prevent static electricity?
Answers
Answer:
Dryer sheets stop static cling by absorbing static electricity formed by different fabrics during your dryer cycle. The fabric softeners that coat dryer sheets are positively charged ions to balance the electrons and ions that cause static cling, leaving you with soft clothes without the static.
Explanation:
After bambard an nuetron on boron atomic amss of boron
Answers
When a neutron is bombarded onto the atomic mass of boron, a process known as neutron capture occurs.
During neutron capture, the neutron is absorbed by the boron nucleus and the boron atom becomes unstable. The unstable boron nucleus then undergoes a series of nuclear reactions, resulting in the production of two high-energy alpha particles and lithium-7. This reaction is commonly known as the boron neutron capture therapy (BNCT) and is used to treat certain types of cancer. In BNCT, boron-10 is used instead of natural boron as it has a high neutron capture cross-section, meaning it has a high probability of capturing a neutron. When boron-10 captures a neutron, it becomes unstable and undergoes nuclear reactions, resulting in the release of high-energy alpha particles which can penetrate tissues and destroy cancer cells.
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A force of 450 N moves a body through 300 cm in the direction of force. Calculate the work
done by the force.
Answers
Answer:
150J
Explanation:
Formula : Work done
Force x distance
work done = force x distance
Distance should be measured in meters
300÷100=3m
work done = 450 x 3
=150J
A light bulb consumes 1800 watt-hours per day. How long does it take to consume 8100 watt-hours? days
hours X 5
Answers
It 4.5 hours for the light bulb to consume 8100 watt-hours of power.
The energy consumed by the light blub = 8100 watt-hours.
Let the time taken be t hours.
We know that;
Energy = power × time
Energy (E) = 8100 watt-hours
Power (P) = 1800 watt
Time (t) =?
8100 = 1800 × t
= 8100 / 1800
= 4.5 hours
The time taken by the light bulb is 4.5 hours.
Therefore, it could take 4.5 hours for the light bulb to consume 8100 watt-hours.
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How much force does it take to move a 35Kg box at an acceleration of 1.5 m/s2?
Answers
Answer: Fa = 52,5N
Explanation: The force that causes an object to move is called Force of application which is calculated by the formula Fa = m × a (Force of application = mass multiplied by the acceleration)
=> Fa = m × a
Fa = 35kg × 1.5m/s²
Fa = 52.5N
what would happen to the pressure of gas particles suddenly stopped moving
Answers
If the gas particles suddenly stopped moving, the pressure of the gas would drop to zero.
Pressure is caused by the collisions of gas particles with the walls of a container. When gas particles are moving, they collide with the walls of the container and exert a force on them, creating pressure. If the gas particles suddenly stopped moving, they would no longer collide with the walls of the container and the pressure would drop to zero.
However, it is important to note that in reality, it is impossible for gas particles to suddenly stop moving. This is because gas particles are always in motion due to their kinetic energy. If the gas particles were to stop moving, they would need to lose all of their kinetic energy, which is not possible according to the laws of thermodynamics.
2. Look again at the image. Let's now assume that it depicts a girl hugging her father before he
leaves for a tour of duty overseas. How could you use science to study the impact of her father's
departure on her family? (2 points)
Answers
Assume for the moment that it shows a young child embracing her mother before he departs for a tour of service abroad. How would you employ science to analyse her effects.
What subjects does science study?What in physics is an energy?
The definition of energy is ability to do work," which is the capacity to apply a force that causes an item to move. organismal biology the study of sentient creatures Social science is the study of people and society.
How does science benefit you as a learner?photo of How might science be used for research,Students who study science get the chance to learn more about how and how things work. Children can learn about the environment they live in through science.
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Answer: The science I would use to study the impact of the father’s departure from her family would be interpretive sociology.
Explanation: The reason I chose this science is because it focuses on the cause of people’s actions.