Yes, the statement is true. When a train is slowing down, it's experiencing a form of acceleration known as negative acceleration or deceleration.
Explanation:
That's a great question about the concept of acceleration. The answer is True. Acceleration in Physics is defined as the rate of change of velocity per unit of time. This change in velocity could be either an increase (speeding up) or a decrease (slowing down). When a train is slowing down, it's indeed undergoing a type of acceleration called deceleration, which is a negative acceleration.
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When a train is slowing down, it is indeed accelerating, but in a negative direction. This is known as deceleration, and while it means the object is slowing down, it is technically still considered acceleration in physics.
Explanation:The statement is true; when a train is slowing down, it is indeed accelerating - but in a negative direction. Acceleration, in physics, is a change in velocity, which includes either a change in its magnitude or direction. When the train slows down, the change in velocity is negative, and we refer to this as negative acceleration or deceleration. Even though the term 'deceleration' can sometimes cause confusion, from a physics standpoint, it's still considered acceleration because acceleration is a vector and has a direction associated with it.
As an example, let's take a look at a train moving with an initial velocity of 20 m/s. After some time, its speed drops to 10 m/s. Here, there's a negative change in velocity, so the acceleration will also be negative.
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Craig used 60 joules of work to lift a weight in 5 seconds.how much power was used
Answer:
the answer is 12
Explanation:
the answer is 12 because u have to think about 5 times 12 which would look like this: 5 x 12 = 60 would have to divide 60 from 5 like it says in the question.
What is acceleration?
Change in velocity
Change in displacement
change in distance
Answer:
acceleration is the rate of change of velocity
ASAP pls will mark brainiest Pls
1.) a body's relative mass or the quantity of matter contained by it, giving rise to a downward force; the heaviness of a person or thing.
2.) Weight is the measure of the force of gravity on an object's mass, while mass is the measure of how much matter there is in an object.
3.) 110.231 pounds
Which of the following does not apply to a convex lens?
used in magnifying lenses
used in microscopes
used in reacting telescopes
used for correcting near-sightedness
Convex lenses are used for correcting farsightedness, in magnifying lenses, and microscopes but not for correcting near-sightedness; concave lenses are used for that purpose.
Among the options given on uses of a convex lens, the statement that does not apply is that they are 'used for correcting near-sightedness'. A convex lens is a converging lens and is typically used to correct farsightedness (hyperopia), as it causes light rays to converge, thereby shifting the focal point to the retina for those who have difficulty focusing on nearby objects. It is also true that convex lenses are used in magnifying lenses and microscopes to produce magnified, virtual, and erect images of objects placed within their focal length. However, for the correction of near-sightedness (myopia), a concave lens is used, which is a diverging lens that helps to extend the focal length, ensuring that images are focused onto the retina rather than in front of it. Telescopes, specifically refracting telescopes, also utilize convex lenses, but reflective telescopes often use concave mirrors due to benefits such as lack of chromatic aberration and the ability to gather more light.
Which is an example of a solution? A) sugar water B) muddy water C) sand and water D) cereal and milk
Sugar water (A) and salt water are solutions.
Muddy water, sand and water, cereal and milk, and vegetable soup are not solutions.
What is a radio interferometer? a device for correcting chromatic aberration in radio telescopes a device for absorbing and transmitting radio waves a network of several radio telescopes wired together a radio communication network joining several reflecting telescopes
Answer: a network of several radio telescopes wired together
Explanation:
A radio interferometer combines signals of several radio telescopes which are used in astronomical observations simultaneously to simulate a discretely-sampled single telescope of very large aperture
Interferometer, an instrument that uses the interference patterns formed by waves to measure certain characteristics of the waves themselves or of materials that reflect, refract, or transmit the waves. Interferometers can also be used to make precise measurements of distance.
A horse is running at 12m/s accelerated to 38m/s in 10 seconds. What is the horses acceleration.
Answer:
A horse is running at 12m/s accelerated to 38m/s in 10 seconds. What is the horses acceleration.
2.6m/s^2
When a horse is running at 12 m/s accelerated to 38 m/s in 10 seconds, the horse's acceleration is 2.6 m/s².
What is acceleration?Acceleration is the rate at which speed and direction of velocity vary over time. A point or object going straight ahead is accelerated when it accelerates or decelerates.
Even if the speed is constant, motion on a circle accelerates because the direction is always shifting. Both effects contribute to the acceleration for all other motions. Acceleration is a vector quantity since it has both a magnitude and a direction.
Initial speed of the horse = 12 m/s.
Final speed of the horse = 38 m/s.
Time interval = 10 seconds.
Hence, the horse's acceleration is = change in speed/time interval
= (final speed - initial speed)/time interval
= ( 38 m/s - 12 m/s)/10 s
= 26/10 m/s²
= 2.6 m/s².
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Which of the following statements is TRUE in regards to Signal #2?
1) Signal #2 is a digital signal that transmits signals continuously.
2) Signal #2 is a digital signal that transmits signals in segments/intervals.
3) Signal #2 is an analog signal that transmits signals continuously.
4) Signal #2 is an analog signal that transmits signals in segments/intervals.
Answer:
2) Signal #2 is a digital signal that transmits signals in segments/intervals.
Explanation:
Signals are form of information propagating from the source to a display unit for appropriate interpretation. It can be either in a digital or analogue form.
A digital signal is a definite signal which is discrete in time and amplitude. It is mostly in the form of codes obtained from set of values. Graphically it transmits in the form of 1 and 0, showing a point of maximum amplitude (1) and minimum amplitude (0).
Analog signal is continuous signal describing the variation of two variables with respect to time.
Crust describes the outermost shell of a terrestrial planet. Earth’s crust is relatively thin, just 40-kilometers (25-miles) deep. Earth's crust can be divided into two types: continental and oceanic. How do these two types of crust differ? All BUT ONE could apply.
Answer:
?
Explanation:
The part of the electromagnetic spectrum that the human eye can detect is divided into ultraviolet light, visible light and infrared light.
True
False
Answer:
false
Explanation:
we can only see wavelengths on the visible light spectrum. everything else is invisible to us
The part of the electromagnetic spectrum that the human eye can detect is divided into ultraviolet light, visible light and infrared light. This is false statement.
What is electromagnetic radiation?Electromagnetic waves, which are synchronized oscillations of the electric and magnetic fields, are the traditional form of electromagnetic radiation. The electromagnetic spectrum is created at various wavelengths depending on the oscillation frequency. Electromagnetic waves move at the speed of light, typically abbreviated as c, in a vacuum.
The oscillations of the two fields create a transverse wave in homogeneous, isotropic media when they are perpendicular to each other, perpendicular to the direction of energy and wave propagation, and perpendicular to each other.
Hence, the part of the electromagnetic spectrum that the human eye can detect is visible light.
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The table below describes 100 offspring of the same two parents. What are the most likely genotypes of the parents?
Data table
A. Ff Ee and ff ee
B. ff Ee and ff ee
C. Ff Ee and Ff Ee
D. FF EE and ff ee
Answer:
A. Ff Ee and ff ee
Explanation:
The table shows approximately equal numbers of black-fur and white-fur offspring, as well as approximately equal numbers of black-eyed and red-eyed offspring. If one parent is Ff Ee and the other is ff ee, the second parent will only contribute recessive genes (f and e) to the offspring. The first parent will contribute F alleles to about half of its offspring, and f alleles to the rest, resulting in similar numbers of black fur (Ff) and white fur (ff) offspring. The same logic applies to eye color. Of the remaining answers, B is not possible because all of the offspring of these parents will have white fur. D is not possible because all of the offspring will inherit an F and an E from the first parent, so all will have black fur and black eyes. Choice C is a possible answer, but that parent combination should result in about 3/4 black-fur offspring, and 3/4 black-eye offspring.
If you were doing a research study on sleep and student achievement, which
of the following might be the hypothesis?
O
A. Students get enough sleep to be effective.
O
B. Memory is affected for students.
O
C. Achievement isn't dependent upon sleep.
O
D. The amount of sleep a student gets affects student achievement.
The hypothesis for a research study on sleep and student achievement would be that the amount of sleep a student gets affects student achievement. Option D. is correct.
Explanation:The hypothesis for a research study on sleep and student achievement would be D. The amount of sleep a student gets affects student achievement. This hypothesis suggests that the amount of sleep a student gets has an impact on their academic performance.
To support this hypothesis, the study would collect data on students' sleep duration and analyze their academic achievements, looking for any correlation between the two.
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If the current at a certain point is 2.0 A, then _______ C of charge flow past that point in 10 seconds.
6 points
5 C
20 C
12 C
0.2 C
Final answer:
If the current at a certain point is 2.0 A, then 20 C of charge flow past that point in 10 seconds, as current is the flow of charge per unit time.
Explanation:
The solution goes as follows: If the current at a certain point is 2.0 A, then the amount of charge that flows past that point in 10 seconds can be calculated using the relationship between current (I), charge (Q), and time (t), which is given by the formula I = Q/t. Therefore, to find the charge, Q, we rearrange the formula to Q = It. Plugging in the given values, we get Q = 2.0 A × 10 s = 20 C. This means that 20 coulombs of charge flow past the point in 10 seconds.
What role does voltage play in the formation or use of an electromagnet?
Answer: did you try using socratic?
Explanation:
Describe what happens to the energy of a wave if the frequency decreases and the frequency increased
"As frequency increases, wavelength decreases. Frequency and wavelength are inversely proportional. This basically means that when the wavelength is increased, the frequency decreases and vice versa. Wavelength is described as the distance between a trough to a trough or a crest to a crest."
I'd recommend paraphrasing it tho.
Physics is explicitly involved in studying which of these activities?
A.
the mixing of metals to form an alloy
B.
the metabolic functions of a living organism
C.
the motion of a spacecraft under gravitational influence
D.
the depletion of the atmospheric ozone layer due to pollutants
E.
the killing of cancerous cells by radiation therapy
How do fission nuclear reactions differ from fusion nuclear reactions? Fission reactions involve the conversion of matter into energy, but fusion reactions do not. Fusion reactions involve the conversion of matter into energy, but fission reactions do not. Fission reactions are used to generate electricity for consumers, but fusion reactions are not. Fusion reactions are used to generate electricity for consumers, but fission reactions are not.
How do fission nuclear reactions differ from fusion nuclear reactions?
A. Fission reactions involve the conversion of matter into energy, but fusion reactions do not.
B. Fusion reactions involve the conversion of matter into energy, but fission reactions do not.
C. Fission reactions are used to generate electricity for consumers, but fusion reactions are not.
D. Fusion reactions are used to generate electricity for consumers, but fission reactions are not.
Answer:
C
Explanation:
Both fission and fusion are nuclear reactions that produce energy, but their applications differs.
Fission is the splitting of a large (heavy, unstable) nucleus into smaller ones, and fusion is the process where nuclei of small atoms are combine together to form the nuclei of larger atoms releasing vast amounts of energy.
The correct answer is c. Fission reactions are used to generate electricity for consumers, but fusion reactions are not.
The physics of fusion is the process that makes the sun shine, and that makes the hydrogen bomb explode.
Each alveolus is surrounded by a network of _____.
capillaries
arteries
veins
cilia
In the diagram, each charge is
-2.35*10^-6 C. What is the net force on
q3? Include a + or - sign to indicate the
direction of the force.
Answer:
Quick maths
First you find the fafarick and the lalickc and the caprisum and the joinnt
When a wire loop is connected to a battery, what is produced in the loop?
Answer:
magnetic field
Explanation:
Answer:
magnetic field
Explanation:
Calculate the equivalent resistance of the circuit below.
Answer:
30Ω
Explanation:
To calculate the equivalent resistance in the circuit, do the following:
Step 1:
10Ω and 20Ω are in series connection. Therefore their equivalent is: 10 + 20 = 30Ω
Step 2:
The equivalent resistance (30Ω) obtained from the above is in parallel connection with 30Ω resistance shown in the diagram above.
Therefore their equivalent is given by:
1/30 + 1/30 = 2/30 = 1/15.
Now invert to obtain the equivalent
Therefore, the equivalent is 15Ω
Step 3:
Determination of the overall equivalent of the resistance of the circuit.
The new equivalent resistance 15Ω obtained above is in series connection with 15Ω resistance in the diagram above.
Therefore their equivalent is given by:
15Ω + 15Ω = 30Ω
Therefore, the equivalent resistance in the circuit is 30Ω
what is potential energy
Answer:
potential energy is energy that is being stored that is going to go into motion. Hope that helps a little
Explanation:
Answer:
Potential energy is the stored energy in an object.
Explanation:
When a roller coaster is going up it is gaining potential energy. When the roller coaster is at the highest point it has the most potential energy, stored energy.
look at it just look at it
Answer:
90 degrees
Explanation:
Answer: oh my goodness that is the epitome of laziness
Explanation:
When Missourians carve their initials into the bark of a tree, the damage leaves the tree open to ____________________.
Answer:
Disease and insects
Explanation:
Carving into tree bark opens the tree to risks such as insect infestation, diseases like Dutch elm disease and chestnut blight, and environmental stress factors.
When Missourians carve their initials into the bark of a tree, the damage leaves the tree open to insects, disease, and other environmental stresses. The tree's bark is a protective barrier, and when it's damaged, harmful organisms and factors can penetrate and cause various kinds of damage. For instance, small mammals like rodents may chew the bark further, insects such as borers can burrow into the tree's cambium, and fungal diseases can infect the tree leading to potential decay or even the tree's death.
In more severe cases, this kind of damage might enable more aggressive pathogens such as the ones responsible for Dutch elm disease or chestnut blight to enter the tree. These diseases have had a significant impact on tree populations in the U.S., causing economic and aesthetic losses. Additionally, damage to the bark can increase the likelihood of environmental stress impacts, such as damage from freezing temperatures or physical injury from larger mammals.
Order the sounds made by these sources from highest to lowest pitch.
telephone, piano, motorcycle, lawn mower
lawn mower, motorcycle, piano, telephone
motorcycle, telephone, piano, lawn mower
lawn mower, piano, telephone, motorcycle
The order of the sounds made by these sources from highest to lowest pitch is motorcycle, telephone, piano, lawn mower. So, the third option is correct.
What is meant by pitch of a sound ?Pitch of a sound is defined as the characteristic of sound that helps us to sense the shrillness of a sound according to the frequency of vibration of the sound.
Here,
The various instruments given are considered as some sources of sound. Among them, the motorcycle is the sound source having the highest pitch.
Then comes the telephone that has second highest pitch.
The sound source that has the third highest pitch is the piano.
Among all the instruments, the lawn mower have the least pitch.
Hence,
The order of the sounds made by these sources from highest to lowest pitch is motorcycle, telephone, piano, lawn mower.
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A ray of light strikes a mirror with an angle of incident of 48º. Calculate: i) the angle of reflection and ii). the angle of deviation. please i really need help in answering this question if anyone answers i will mark you profile as brainliest
Answer:
I) angle of reflection = 48 degrees
II) angle of deviation = 0
Explanation:
Given that the:
angle of incident = 48º.
According to law of reflection which state that the angle of incident is equal to the angle of reflection.
I.) Therefore,
angle of reflection = 48º.
II.) There can only be deviation if the mirror has a diffused surface. But for a smooth plane mirror, there can never be any deviation.
Therefore ,
The angle of deviation = 0
5. Electromagnetic radiation travels at a speed of 3.0 x 10^8 m/s.
a) What is the wavelength of a radio wave that has a frequency of 3.5 x 10^5 Hz? b) What is the frequency of an X-ray that has a wavelength of 2.5 x 10^-10 m?
Answer:
a=805714*10^2
b=1.2*10^18
Explanation:
a) v=lf
Where l is wavelength sorry can't draw it
3*100000000=l*350000
L=8. 5714*10^2
b) v=lf
300000000=0.00000000025f
f=1.2*10^18
How are magnetic force and distance from an object related
Answer:
Magnetic force obeys an inverse square law with distance
Explanation:
I NEED THIS FAST
Which of the following is true of real machines?
o work output is less then work input
o work output equals work input
o work input is decreased because of friction
o work output is greater than work input
Answer:
Work output is less than work input.
Explanation:
Work output can never be greater than work input. Machines allow force to be applied over a greater distance, which means that less force will be needed for the same amount of work. When a machine changes the size of the force, the distance through which the force is exerted must also change.
Brainliest???
Consider two circular metal wire loops each carrying the same current I as shown below. In what r... Consider two circular metal wire loops each carrying the same current I as shown below. In what region(s) could the net magnetic field B be equal to zero? III IV .RS O None of them O 1, III, and v O III only O II and IV Submit Answer Tries 0/1
Answer:
1, III, and v
Explanation:
The will be repulsion of magnetic field at that region since the direction of magnetic field is perpendicular to the direction of current.
In regions symmetrically located between two circular wire loops with current flowing in opposite directions, it is possible for the net magnetic field to be zero.
The question involves finding the regions where the net magnetic field could be equal to zero when two circular metal wire loops each carry the same current I. According to physics, particularly the study of magnetism and Ampere's Law, the magnetic field around a current-carrying wire forms concentric circles. If two such loops carry current in the same direction, their magnetic fields at a point between them will add together. Contrarily, if the loops carry currents in opposite directions, the magnetic fields may cancel each other out at some point between them, resulting in a net magnetic field of zero.
Such a scenario is depicted in the provided example where two loops are shown with their respective magnetic fields acting in opposite directions at point P, yielding a net magnetic field of zero. Therefore, to answer the student's question, it is likely that the net magnetic field could be zero in a region that lies symmetrically between the two loops if the currents are flowing in opposite directions.