A car of mass 1167 kg accelerates on a flat highway from 10 m/s to 28.0 m/s. How much work does the car's engine do on the car?
Answers
Answer:
Workdone = 465766038 Joules.
Explanation:
Given the following data;
Mass = 1167
Initial velocity = 10m/s
Final velocity =28m/s
To find the workdone;
We know that from the workdone theorem, the workdone by an object or a body is directly proportional to the kinetic energy possessed by the object due to its motion.
Mathematically, it is given by the equation;
W = Kf - Ki
W = ½MVf² - ½MVi²
Substituting into the equation
W = ½(1167)*28² - ½(1167)*10²
W = ½ * 1361889* 784 - ½ * 1361889 * 100
W = 533860488 - 68094450
Workdone = 465766038 Joules.
Related Questions
How can you tell there is only one atom of oxygen in H2O?
Answers
Answer:
For H2O, there is one atom of oxygen and two atoms of hydrogen. A molecule can be made of only one type of atom. In its stable molecular form, oxygen exists as two atoms and is written O2. to distinguish it from an atom of oxygen O, or ozone, a molecule of three oxygen atoms, O3.
Explanation:
You hold a shiny tablespoon at arm's length and look at the front side of the spoon.
(a) Is the image you see of yourself upright or inverted?
upright / inverted
(b) Is the image enlarged or reduced?
enlarged / reduced
(c) Is the image real or virtual?
real / virtual
Answers
(A) The image you see of yourself in the shiny tablespoon is inverted.
(B) The image you see of yourself in the shiny tablespoon is reduced.
(C) The image you see of yourself in the shiny tablespoon is virtual.
A) When you look at the front side of the spoon, the light rays reflecting off your face or any other object get reflected by the curved surface of the spoon. This reflection follows the laws of reflection, resulting in an inverted image. Therefore, the image you see of yourself in the spoon is inverted.
B) In this case, the shiny tablespoon acts as a concave mirror. Concave mirrors can produce reduced images depending on the position of the object relative to the mirror's focal point. When the object is held at arm's length, the image formed in the spoon is smaller in size compared to the actual object. Hence, the image you see of yourself in the spoon is reduced.
C) A virtual image is formed when the light rays do not physically converge at the location of the image. In the case of a spoon, the reflected rays from the curved surface do not intersect to form a real image that can be projected onto a screen. Instead, your eyes perceive the apparent image formed by the reflected rays, which is known as a virtual image. Therefore, the image you see of yourself in the spoon is virtual.
Option (A) inverted, (B) reduced, and (C) virtual are the correct answers.
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Can you take your phone in a tanning bed?
Answers
No, you cannot take your phone in a tanning bed. Tanning beds use ultraviolet (UV) light to help people achieve a dark, even tan. However, this light can damage electronic devices, such as cell phones.
The heat generated by the bulbs and the strong UV radiation can damage the phone’s internal components and cause the phone to overheat. This can lead to short circuits and permanent damage to the phone.
In addition to the damage caused by UV light, the high temperatures of the tanning bed may cause the phone to overheat, leading to further damage, such as battery failure. Overheating may also cause the phone to shut down or restart unexpectedly, resulting in data loss and further damage.
Finally, taking your phone into a tanning bed may be a distraction. Tanning beds require the user to remain still and relaxed in order to achieve optimal results. Having your phone in the bed may disrupt this process and lead to a less effective tanning session.
For all of these reasons, it is not recommended to take your phone into a tanning bed. Doing so may cause irreparable damage to the device and may disrupt the tanning process.
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speed refers to the number of people that pass a given reference point in a time frame.
T/F
Answers
Answer:True
Explanation:
Need help big time plz help
Answers
Answer: hmm
Explanation:
hmmm
are you more likely to be able to walk at constant velocity
Answers
When you walk, you are more likely to be able to walk at a constant velocity. Your walking speed varies as you walk in real-life scenarios, but you aim to maintain a steady pace or velocity. This is how you can keep track of time and distance traveled.
When you walk at a constant velocity, you move forward with a steady speed and direction. The velocity is defined as the rate at which an object's position changes with respect to time. When you walk, you typically aim to move forward with a constant velocity, which is the speed at which you walk and the direction you walk. In certain situations, a constant velocity is ideal, such as when you are traveling long distances and want to arrive at your destination at a certain time. To ensure that you walk at a constant velocity, you need to maintain a steady pace by keeping your stride consistent and avoiding unnecessary stops or changes in direction. Walking with a constant velocity involves maintaining a steady speed and direction. It is possible to achieve this by maintaining a constant pace, keeping your stride consistent, and avoiding any unnecessary stops or changes in direction.
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Which of the following does not illustrate a complete circuit?
Answers
Answer:
I think A
Explanation:
because it dosn't have enough tools
two long ideal solenoids (with radii 20 mm and 30 mm respectively) have the same number of tunrs of wire per unit length. the smaller solenoid is mounted inside the larger, along a common axis. it is observed that there is zero magnetic field within the inner solenoid. the current in the inner solenoid must be
Answers
The fact that there is zero magnetic field within the inner solenoid implies that the magnetic field generated by the larger solenoid cancels out the magnetic field generated by the smaller solenoid at its center. This means that the current flowing through the inner solenoid must be equal and opposite in direction to the current flowing through the outer solenoid.
We know that the magnetic field inside a solenoid is directly proportional to the current flowing through it, and inversely proportional to its radius. Since the two solenoids have the same number of turns of wire per unit length, their magnetic fields at a given distance from their centers will be proportional to their radii. Therefore, we can conclude that the current flowing through the inner solenoid must be less than the current flowing through the outer solenoid, since its radius is smaller.
To determine the exact ratio of the currents, we can use the fact that the magnetic field at the center of a solenoid is proportional to the product of its current and the number of turns of wire per unit length. Equating the magnetic fields of the two solenoids at the center of the inner solenoid, we can solve for the ratio of the currents. This gives us the exact value of the current in the inner solenoid that is required to cancel out the magnetic field of the outer solenoid at its center.
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for two objects in space with very different masses, the gravitational force causes:
A.
the two objects to remain stationary.
B.
the less-massive object to orbit the more-massive object.
C.
the more-massive object to orbit the less-massive object.
D.
the two objects to both orbit a central point together.
Answers
Explanation: The more massive the object, the larger its gravitational pull.
Example: the moon orbits the earth because the moon’s mass is smaller than earth, earth orbits the sun because the earth’s mass is smaller than the sun..
Glass does not transmit ultraviolet radiation. Suggest what happens to ultraviolet radiation when it is incident on glass. (1 mark)
Answers
Answer:
Most of UV radiation is stopped by glass & this is why you will not get sunburns behind a glass. The glass simply filters out the UV radiation that is responsible for the sunburns & protect your skins from these energetic & somewhat harmful radiation
Explanation:
feature detectors a cause the lens to change its curvature in response to incoming light waves. b are nerve cells in the brain's visual cortex that fire in response to specific edges, lines, and angles. c are retinal cells that allow you to see in dim light and are located in the periphery of the eye. d are primarily located in the fovea. e combine to form the optic nerve, which sends visual information to the brain.
Answers
These are nerve cells in the visual cortex of the brain that cause the lens to adjust its curvature in response to incoming light waves.
brain nerve cells that react to certain characteristics of the stimuli, such as form, angle, or movement a neuron whose activity spikes when the retina is presented a certain pattern. specialized neurons that combine lines, edges, angles, etc. in the visual cortex of the occipital lobe using data from individual retinal ganglion cells. The principal area of the brain responsible for receiving, integrating, and processing visual information received from the retinas is known as the visual cortex. It is located in the most backward part of the brain, in the primary cerebral cortex's occipital lobe.
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How does the mass of an object affect its acceleration?
Answers
Answer:
the mass + the 1 constant g-force = the speed without adding air resistance
Explanation:
osmium it the most tightly packed alloy in the world so for that it will have a faster acceleration
Which of the following statements are true about conduction? Select all that apply. *
-In most solids, conduction takes place as particles vibrate in place.
-Matter is transferred great distances during conduction.
-Thermal energy is transferred without transfer of matter.
-Conduction can occur between materials that are not touching.
Answers
Answer:
Matter is transferred great distances during conduction. (t think i'm not truly sure)
Explanation:
The direct transfer of energy from one molecule to another is known as conduction. Conduction occurs in solids, liquids, and gases, but it is most effective in solids. Heat transfer by radiation, unlike conduction or convection, does not require any matter.
hope this helps
According to the concept of conduction,matter is transferred great distances during conduction.
What is conduction?Conduction is defined as a process as a means of which heat is transferred from the hotter end of the body to it's cooler end.Heat flows spontaneously from a body which is hot to a body which is cold.
In the process of conduction,heat flow is within the body and through itself.In solids the conduction of heat is due to the vibrations and collisions of molecules while in liquids and gases it is due to the random motion of the molecules .
When conduction takes place, heat is usually transferred from one molecule to another as they are in direct contact with each other.There are 2 types of conduction:1) steady state conduction 2) transient conduction.According to the type of energy conduction is of three types:
1) heat conduction
2) electrical conduction
3)sound conduction
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Suppose a spectral line of hydrogen, normally at 500 nm when measured in a lab on Earth, is observed in the spectrum of a star to be at 500.3 nm. This is called a red shift because the wavelength is longer (and red is on the long-wavelength side of the visible spectrum). How fast is the star moving away from Earth? Give your answer in m/s. Hint: follow example 5.6. Compare in particular to the "Check your learning" calculation, and note that larger Δλ means larger speed.
Answers
The star is moving away from Earth at a velocity of 1.8 x 106 m/s.
The Doppler Effect describes the shift in wavelength of a wave when the source is moving in relation to the observer. The shift can be observed in sound waves, light waves, and other waves.
The Doppler Effect can be used to determine the velocity of objects moving away from an observer, as in the case of stars moving away from Earth.
The velocity of a star moving away from Earth can be determined using the equation:
v = Δλ/λ x c, Where v is the velocity of the star, Δλ is the shift in wavelength of the spectral line, λ is the wavelength of the spectral line measured in the lab on Earth, and c is the speed of light (3.00 x 108 m/s).
In this case, the shift in wavelength of the spectral line is Δλ = 500.3 nm - 500 nm = 0.3 nm.
The wavelength of the spectral line measured in the lab on Earth is λ = 500 nm.
Plugging in these values to the equation above: v = Δλ/λ x cv = (0.3 nm / 500 nm) x (3.00 x 108 m/s) = 1.8 x 106 m/s.
Therefore, velocity of star 1.8 x 106 m/s.
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what can i about charges that were made against me but dropped by the pwerson who made them but are still on record
Answers
If you have charges that were made against you but were dropped by the person who made them but are still on record, you can still take steps to address the situation. It is important to note that having charges on your record can have negative effects on your life, such as hindering your ability to secure employment and housing.
To address this situation, you may need to seek legal advice or the assistance of a criminal defense attorney. They will be able to guide you through the process of getting the charges removed from your record, or having them expunged. This will involve filing a petition to the court, providing evidence that the charges were dropped, and demonstrating that you meet the eligibility criteria for expungement or record sealing
. The process may vary depending on your location and the type of charges you faced, so it is important to seek guidance from a legal professional.To summarize, if you have charges that were made against you but were dropped by the person who made them but are still on record, you can seek legal advice or the assistance of a criminal defense attorney to have the charges removed from your record through a petition to the court.
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Adjust the frequency to 100% so the bulb is always "on."With the electromagnet still just to the left of the pickup coil, how does the average brightness of the light bulb depend on the number of loops of the pickup coil? (You can change the number of loops in the Pickup Coil properties box at bottom right.)
Answers
Adjusting the frequency to 100% will cause the bulb to always be on because the high frequency will not allow the bulb to turn off.
As for the average brightness of the light bulb with the electromagnet to the left of the pickup coil, it depends on the number of loops of the pickup coil. The more loops there are, the higher the brightness will be because there is more electromagnetic energy being transferred to the coil, which in turn produces a stronger magnetic field that powers the bulb. So, increasing the number of loops in the Pickup Coil properties box will result in a brighter light bulb. The average brightness of the light bulb will depend on the number of loops of the pickup coil in that the more loops there are, the greater the output of the coil.
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you can prevent a mask from fogging under water by lowering the _____ of the water.
Answers
You can prevent a mask from fogging under water by lowering the surface tension of the water.
Surface tension is the measure of how strongly the molecules of a liquid are attracted to each other at the surface.
When the surface tension of water is high, it causes water molecules to form a cohesive layer, which can trap air and lead to fogging on surfaces like a diving mask. To prevent this, an anti-fog solution or spray can be applied to the inside of the mask's lenses.
These solutions work by reducing the surface tension of the water droplets that form on the lens, allowing them to spread out and form a thin, uniform layer that is less likely to fog up.
A well-fitting mask can also help prevent water from seeping in, which can contribute to fogging.
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select all of the following descriptions that match what happens when a ferromagnetic material is placed in an external magnetic field. a. the ferromagnetic material becomes magnetized. b. nothing, ferromagnetic materials do not interact with magnetic fields. c. the ferromagnetic material becomes negatively charged. d. the ferromagnetic material becomes positively charged. e. the external magnetic field induces magnetic poles in the ferromagnetic material. f. the ferromagnetic material rapidly cools.
Answers
A. The ferromagnetic material becomes magnetized: Ferromagnetic materials are strongly magnetic and become magnetized when placed in an external magnetic field. The magnetic domains within the material align themselves with the external field, resulting in a strong net magnetic moment.
E. The external magnetic field induces magnetic poles in the ferromagnetic material:The external magnetic field induces a magnetic moment in the ferromagnetic material, which causes it to behave as a magnet. The magnetic moment induced by the external field is much stronger than that of other materials, such as diamagnetic or paramagnetic materials.
Therefore, the correct statements are (a) and (e). Ferromagnetic materials are strongly magnetic and can be magnetized, unlike diamagnetic or paramagnetic materials, which are only weakly magnetic and do not become magnetized in an external magnetic field.
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As shown in the figure below, Louisa rushes 40 m toward her truck. She notices she forgot her bag and
returns back to the house. Her total travel time is 120 s.
40 m, 40 m
a) What is Louisa's average velocity over the 120 s period?
m/s
b) What’s is Louisa’s average speed over the 120 period?
Answers
Answer:i only have the second answer as i got that in a paper ages ago
Answer is 0.67 m/s thats for B btw
Explanation:hope that helped
The average velocity and average speed of Louisa are 0m/s and 0.67 m/s respectively.
To find the answer, we need to know about average velocity and average speed.
What is average velocity?Average velocity is the ratio of total displacement and total time of travel.It's a vector quantity.What is average speed?Average speed is the ratio of total distance travelled to total time taken. It's a scaler quantity.What are the average velocity and average speed of Louisa?Here, Louisa came back to her house, so her total displacement is zero. Therefore, the average velocity is 0.But, her total travelled distance is 40m + 40m=80m. So, average speed is 80/120= 0.67mThus, we can conclude that the average velocity and average speed of Louisa are 0m/s and 0.67m/s respectively.
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Ken received a 66 on his first math exam, which counted for 20% of his final grade; he now believes that he won't be able to pass the class. His conclusion best illustrates a pessimistic outlook. the fight-or-flight response. problem-focused coping. relative deprivation.
Answers
Answer:
His conclusion best illustrates a pessimistic outlook.
Explanation:
As seen in the question above, Ken got 20% of his final grade in the first test he did for this class, that is, there will be other tests that can provide him to reach the grade needed to pass the class. However, even if there are possibilities, he believes that he will not pass the class, he does not have a positive and optimistic view of his future in this class and is sure that he will fail. This negative view of the future is an example of a pessimistic outlook.
Which waves can
travel though space
Answers
Answer: Radio waves
Explanation:
Radio waves can travel through space. So, if you're wearing a space suit that contains a radio unit and one of your buddies sends you a radio message that there's pizza in the space station, you'd be able to hear it. That's because radio waves aren't mechanical -- they're electromagnetic. Electromagnetic waves can transmit energy through a vacuum.
What is the rate at which velocity changes called?
Answers
sam, a train engineer, blows a whistle that has a frequency of 4.0 *10^2 hz is the train approaches a station. if the speed of the train is 25 m/s, what frequency will be heard by a person at the station?
Answers
A person at the station would hear a frequency of 428.37 Hz.
To determine the frequency heard by a person at the station, use the formula for the Doppler effect:
f' = f × (v + v₀) / (v + vₛ)
Where:
f' is the frequency heard by the observer at the station
f is the frequency of the whistle (4.0 × 10² Hz)
v is the speed of sound in air (approximately 343 m/s)
v₀ is the speed of the train (25 m/s)
vₛ is the speed of the observer at the station (0 m/s, since they are stationary)
Substitute the values in the above equation:
f' = (4.0 × 10² Hz) × (343 m/s + 25 m/s) / (343 m/s + 0 m/s)
Simplifying the equation:
f' = (4.0 × 10² Hz) × (368 m/s) / (343 m/s)
f' = 428.37 Hz
Therefore, 428.37 Hz will be heard by a person at the station.
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structure of conductor and insulator
Answers
Insulator: A material with a substantial gap between the valence and conduction bands. Because no electrons can travel up to the conduction band, the valence band is filled. As a result, the conduction band is completely vacant.
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Conductor: The valence bands of a conductor are not complete, hence the conduction band is continuous with the valence band. Electrons in the valence band will migrate to the conduction band, leaving a positive charged vacancy known as a hole behind.
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Insulator Defintion:
Energy band Theory:
According to this theory the overlapping of valence band and conduction band tells us about the conductivity of a substance, in insulators the valence band and the conduction band both are separated to a large distance which will cannot be over lapped by applying small energy. If conduction band and valence band don't overlap there would be no exchange of electrons and in that case the material cannot conduct electricity or heat.
Presence of Free Electrons:
The conductivity of a element is wholly and solely dependent upon the presence of free electrons which which can move freely and conduct electricity . In insulators there are no free electrons and in that case it cannot conduct electricity.
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Conductor Definition:
A conductor is an object or kind of material in physics and electrical engineering that permits charge (electric current) to travel in one or more directions. Metal materials are common electrical conductors. The materials or substances that allow electricity to flow through them are referred to as conductors. Furthermore, conductors allow heat to pass through them. Metals, the human body, the Earth, and animals are all examples of conductors. The human body is an excellent conductor.
If a force of 220N is used to shoot a cannonball out of 2.4 m long how much kinetic energy will the cannonball gain? What kind of energy is being created?
Answers
The kinetic energy of the ball is 528 J.
The Energy created is Mechanical Energy.
This is the energy of a body due to motion.
The Kinetic energy of the ball can be calculated using the formula below.
Formula:
E = Fd................. Equation 1Where:
E = Kinetic energy of the ball F = Force on the balld = DistanceFrom the question,
Given:
F = 220 Nd = 2.4 mSubstitute these values into equation 1
E = 220(2.4)E = 528 JHence, The kinetic energy of the ball is 528 J.
The Energy created is Mechanical Energy.
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What is the weight of the body under the influence of a force of 10N reaches a speed of 1.5 m / s in 3s?
Answers
Answer:
Explanation:
F=ma
F=10N
A=v-u upon t
=1.5-0 upon 3
=0.5m per second squared
Then do force divided by. Accelaration and multiply by gravity.
A car driving at a constant velocity of 15 m/s has what acceleration? PLEASE HELP
Answers
Answer:
32
Explanation:
A rigid body consists of three masses fastened as follows: m at (a, 0, 0), 2m at (0, a, a), and 3m at (0, a, -a). (a) Find the inertia tensor I. (b) Find the principal moments and a set of orthogonal principal axes.
Answers
(a) The inertia tensor I for the rigid body is given by I = diag(I_xx, I_yy, I_zz), where I_xx = (2m*a² + 6m*a²), I_yy = (m*a² + 6m*a²), and I_zz = (m*a² + 2m*a²).
(b) The principal moments are I_xx, I_yy, and I_zz, and the orthogonal principal axes are x-axis, y-axis, and z-axis.
(a) To calculate the inertia tensor I, we compute the components I_xx, I_yy, and I_zz, which represent the moment of inertia around the x, y, and z axes, respectively. For each mass, we apply the formula for moment of inertia: I = m*r², where m is the mass and r is the perpendicular distance from the axis of rotation.
(b) We sum the moments of inertia for each mass and find the diagonal matrix with the resulting values. The principal moments are simply the diagonal elements of the inertia tensor, and since the off-diagonal elements are zero, the principal axes coincide with the coordinate axes.
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What is the thermal energy of an object?
Question options:
the total potential temperature of its particles
the total potential energy of its particles
the total kinetic energy of its particles
the total kinetic and potential energy of its particles
Answers
Answer:
the total kinetic and potential energy of its particles
Explanation:
The energy contained in the small motions of the object's molecules can be broken up into a combination of microscopic kinetic energy and potential energy.
Which argument best explains the charge of an atomic nucleus
Answers
Answer:
An atomic nucleus is positively charged because it is composed of protons.
Explanation:
define protons, match it up.