A car of mass 800 kg travels over a hill of height h. By travelling to the top of the hill, the car gains 40000 J of gravitational potential energy. The gravitational field strength g is 10 N /kg
[tex] \sf\huge{\underline{\underline{\overbrace{Answer}}}} [/tex]
The height of the hill is 5m.
Explanation:
Given :-⠀
Mass of the car (m) = 800kg
Height of the hill (h) = ?
Gravitational field strength (g) = 10N/kg
Potential energy (P.E.) = 40,000J
⠀
To find :-⠀
The height of the hill
⠀
Solution :-⠀
▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃
⠀⠀⠀ ⠀⠀■ NoteThe gravitational potential energy is the energy acquired by the object when the mass of the object is under the gravitational pull of the earth. It is directly proportional to mass and height of the object. If the mass or the height of the object increases the potential energy also increases.
⠀
⠀⠀⠀⠀⠀□ ExampleIf we keep a book on the table and if we push the book from the table. This will result in the falling of the book on ground due to gravitational pull of the earth of it's mass and height.
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⠀
⠀
While formula to find potential energy is
⠀
[tex] \tt{\Large {P.E. = mg}}h[/tex]
But we need to find 'h'
so the formula for 'h' will be
⠀
[tex] \bold{\Large {h = \frac{P.E. }{mg} }}[/tex]
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⠀
⠀
Now substituting the required values.
⠀
[tex] \sf \hookrightarrow h = \frac{40000}{800 \times 10} \\ \\ \\ \sf \hookrightarrow h = \frac{40 \cancel 0 \cancel 0 \cancel 0}{8 \cancel 0 \cancel 0 \times \cancel{10}} \\ \\ \\ \sf \hookrightarrow h = \frac{ \cancel{ 40} \: \:{ \small{5}}}{ \cancel 8} \\ \\ \\ \boxed {\hookrightarrow h = 5m}[/tex]
I NEED HELP!!!!
The three areas of discipline are ________.
isolation
instruction
punishment
admonition
nurture
Answer:
Instruction, admonition, nurture
Explanation:
the practice of training people to obey rules or a code of behavior, using punishment to correct disobedience:Complete the paragraph to describe the characteristics of the Sun and Rigel, a blue-white supergiant.
Rigel and the Sun have similar characteristics, but they also differ in some ways. Rigel and the Sun are spheres of gas that use nuclear fusion to produce energy. Rigel is
the Sun. Rigel has
the Sun. Rigel has a surface temperature of about
.
The Rigel is more warmer and brighter as compared to the sun due to its high temperature.
Describe the characteristics of the Sun and Rigel?The Rigel is more warmer and brighter as compared to the sun due to its high temperature and its brightness is about 47,000 times more than that of the Sun. Because of its high temperature, the Rigel is white as compared to the sun.
So we can conclude that the Rigel is more warmer and brighter as compared to the sun due to its high temperature.
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A student picks up four books from the floor, walks across the room through some distance with the book
at the same height and then keeps these books at the new place. In which of these sequence of actions
work is said to be performed ?
Work is performed while initially lifting books off the floor. The work is due to gravity.
Describe the electric and magnetic fields of an electromagnetic wave.
A small car of mass 450kg is pushing a large truck of mass 980kg due east on a level road. The car exerts a horizontal force of 1520N on the truck. What is the magnitude of the force that the truck exests on the car
F = 1520N
explanation:
by newton third law of motion every action has equal and opposite reaction so truck exert on it so F = 1520N
that's my answer
An ideal pendulum is often discussed when studying simple harmonic motion. what are the conditions needed for an ideal pendulum? check all that apply. gravitational force acts to pull the pendulum’s mass down. the mass of the rod of the pendulum is evenly distributed along the rod. the pivot on which the pendulum swings is frictionless. the pendulum swings through its equilibrium position as a result of inertia. tension acts downward on the pendulum’s mass.
The conditions needed for an ideal pendulum are;
The mass of the rod of the pendulum is evenly distributed along the rod. The pivot on which the pendulum swings is frictionless. The pendulum swings through its equilibrium position as a result of inertiaWhat is an ideal pendulum?An ideal pendulum is a type of pendulum that satisfies the following conditions,
The mass of the pendulum rod should be evenly distributed throughout the rod.The pendulum must move in a frictionless medium.The pendulum must move from the equilibrium position.Thus, the correct statements are second, third and the fourth.
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Answer:
b, c and d are correct ;)
Explanation:
The atomic number of an element whose atoms have 12 protons and 10 neutrons is
what is the difference between reflection and refraction? What changes and what does not change.
Answer:
Reflection involves a change in direction of waves when they bounce off a barrier. Refraction of waves involves a change in the direction of waves as they pass from one medium to another.
Explanation:
2. What would be the acceleration of the clown at 5 s? (A) 1.6 m/s2 (B) 8.0 m/s2 (C) 2.0 m/s2 (D) 3.4 m/s2 3. After 12 seconds, how far is the clown from her original starting point? (A) 0 m (B) 10 m (C) 47 m (D) 74 m
Which field of science gives us the idea that spacetime is not just a flat grid but is
itself a physical entity that can be bent and molded?
A: General Relativity
B: Time dilation
C: quantum mechanics
D: gravitational physics
The field of science that gives us the idea that spacetime is not just a flat grid but is itself a physical entity that can be bent and molded is known as quantum mechanics. Thus, the correct option for this question is C.
What is Quantum mechanics?Quantum mechanics may be defined as a fundamental theory in physics that significantly provides a detailed description of the physical properties of nature at the scale of atoms and subatomic particles. It is basically the branch of physics that deals with the behavior of matter and light on a subatomic and atomic level.
Time dilation in the theory of special relativity is the “slowing down” of a clock as determined by an observer who is in relative motion with respect to that clock.
General relativity is the theory of gravity. The basic idea is that instead of being an invisible force that attracts objects to one another, gravity is a curving or warping of space. The more massive an object, the more it warps the space around it.
Therefore, quantum mechanics is the field of science that gives us the idea that spacetime is not just a flat grid but is itself a physical entity that can be bent and molded. Thus, the correct option for this question is C.
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Two students, Jordan and Taylor, are talking about light. Jordan says that light behaves as a stream of particles. Taylor declares that light behaves as a wave. Which student is correct?
Answer:
"Both students are correct. When light is traveling through small openings, solids, liquids, gases, or a vacuum, it behaves like a wave. When it interacts with matter, it acts like a stream of particles."
Explanation:
just got it right
The speed of light traveling through an unknown material is 1.98×108 m/s. Given that the speed of light in a vacuum is 3.00×108 m/s, what is the dielectric constant of the unknown material?
The dielectric constant of the unknown material is 2.3.
What is dielectric constant?Dielectric constant is referred as a relative permittivity or amount of charge required to produce one unit of electric flux in a given medium.
Given the speed of light in vacuum c =3 x 10⁸ m/s and the speed of light through an unknown material v = 1.98 x 10⁸ m/s.
The dielectric constant is related to the velocity by the following relation,
v = c/√K
Rearranging for dielectric constant, we get
K = (c/v)²
Substitute the value into the expression ,we get
K =(3 x 10⁸ / 1.98 x 10⁸)²
K = 2.3
Thus, the dielectric constant of the unknown material is 2.3.
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50 POINTS! I PROMISE BRAINLIEST IF PLEASEEE I NEED HELP!
A newly developed military robot has a sense of self-preservation and can also make decisions for itself in warfare. what form of ai is this?
the robot exhibits signs of
ai, which is a sub-form of
ai
The type of artificial intelligence used in the area of military operations is deep learning artificial intelligience.
What is artificial intelligence?
The term artificial intelligence has to do with the simulation of the decision making ability of the brain in machines.
This has also been experimented in the area of military operations. This type of artificial intelligence is called deep learning artificial intelligience.
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what is weight?how can we measure it
Answer:weight is a vector.
Explanation: It is measured in Newtons (N) and has direction
Answer:
total gravity of mass on earth. it can measured by Newton
Explanation:
I think it will help you. follow me ok .
An object weighing 6 kg moving at a speed of 12 m / s was stopped by a force of 18 newton. At what time does the subject accelerate?
Answer:
F ΔT = Δ(M V)
Change in momentum is equal to applied force* time
Δ(M V) = 6 kg * 12 m / s = 72 kg-m / s
ΔT = 72 kg-m/s / 18 kg-m/s^2 = 6 s after 6 sec it will tend to rebound
which statement best describes the position of the image of an object viewed in a plane mirror?
A). the image is a different distance from the mirror but on the same side of the mirror as the original object
B). the image is the same distance from the mirror and on the same side of the mirror as the original object
C). The image is a different distance from the mirror and on the other side of the mirror as the original object.
D). the image is the same distance from the mirror but on the other side of the mirror as the original object.
The statement D best describes the position of the image of an object viewed in a plane mirror, The image is the same distance from the mirror but on the other side of the mirror as the original object.
What is the image?When light beams from an object reflect off a mirror, they intersect with the picture of that thing, called an image. Real and virtual images are the two sorts of images.
The following parameters can be used to describe an image:
1. It is possible for an image to be real or virtual.
2. Left-right reversal is possible or not.
3. The image can be inverted or upright.
4. The image can be enlarged, shrunk, or made the same size as the object.
Plane mirrors provide virtual images that are upright, inverted left-right, the same distance from the mirror as the item, and the same size as the thing.
As a result, the best description of image production by a plane mirror is “a virtual picture is produced behind the mirror.”
The statement D best describes the position of the image of an object viewed in a plane mirror, The image is the same distance from the mirror but on the other side of the mirror as the original object.
Hence, option D is correct.
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What is the acceleration of a 25 kg box that has 50 N of force applied to the right?
1. 2m/s/s
2. 10m/s/s
3. 1,250m/s/s
Answer:
1. 2 m/s/s
Explanation:
Formula
Force = Mass x Acceleration
50 N = 25 kg x (a)a = 50/25a = 2 m/s/sexplain what uncertainty is and how you would calculate the uncertainty of a mean result
Answer:
https://stats.stackexchange.com/questions/454120/how-can-i-calculate-uncertainty-of-the-mean-of-a-set-of-samples-with-different-u
Explanation:
A box on a spring is pushed to point A and allowed to oscillate. Describe the motion of the box at points A, B, and C. Be sure to use the words maximum velocity, minimum velocity, maximum displacement, minimum displacement, maximum acceleration, minimum acceleration, equilibrium, and restoring force where appropriate.
As the box begins to oscillate, it will have minimum velocity at maximum displacement and maximum velocity at minimum displacement.
Oscillation of the box
The force applied to box will cause a displacement of the box from equilibrium position to maximum position which increases as the applied force increases.
Therefore, as the box begins to oscillate, it will have minimum velocity at maximum displacement and maximum velocity at minimum displacement.
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Can someone please answer this, ill give you brainliest Would be very appreciated.
Answer:
leaf margins
Explanation:
Scientists study ice cores and leaf margins to learn about the past climates.
Further explanation :
Leaf margins are an indicator of the temperature in which a tree lives or lived. Paleobotanists use the margins of fossil leaves to infer past temperatures.
Answer:
Snail shells
Explanation:
Yea surprising answer but like this is from the web -> "New research shows that snail shells retain their carbon and oxygen isotope signatures after being boiled and, through those proxies, likely still preserve an accurate record of past temperature, rainfall, and vegetation."
Sorry if wrong and hope it helps! :)
Question 9 of 15
6
an object is moving due north at 32m/s does this tell you the speed or the velocity of the object, or
both?
Given that the object is moving due north at 32 m/s, this simply expresses the velocity of the object.
What is a scalar quantity?This is a quantity that has magnitude but no direction. Examples include energy, work, speed, distance etc
What is a vector quantity?This is a quantity which have both magnitude and direction. Example include acceleration, velocity, moment, displacement etc
What is velocity?Velocity is the rate of change of displacement with time.
Velocity = displacement / time
Velocity can be written as 4 m/s due east
What is speed?This the distance travelled per unit time.
Speed = distance / time
Speed can be written as 4 m/s
Considering the question given above, we were told that the object is moving due north. This simply talks about the velocity.
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What will happen to the force between 2 charged objects if the mass of one of the charges is doubled and the distance between them is double?
What related fitness components are improved in dancing?
a satellite moves in a circular orbit around the earth at a speed of 5000 ms. determine the satellites altitude above the earths surface
Answer:
G M m / R^2 = m v^2 / R centripetal force = force of attraction
R = G M / v^2 radius of satellite orbit
R = 6.67E-11 * 5.98E24 / 5000^2
R = 6.67 * 5.98 / 25 * 10^7 m = 1.60 * 107 m = 16 * 10^6 m
Radius of earth = 6.37 * 10^6 m
H = R - r = (16 - 6.4) * 10^6 m = 9.6 * 10^6 m
Which of the following is correct for speed?
A vector
Depends on Distance
Unit is a meter/second (m/s)
A vector
Depends on Displacement
Unit is a meter/second (m/s)
A scalar
Depends on Distance
Unit is a meter/second (m/s)
A scalar
A
Depends on Displacement
Unit is a meter/second (m/s)
Answer:
Speed is a "scalar" quantity
(C) is the correct answer
An object could travel at 10 m/s to some point and then return to the origin at 10 m/s for an average speed of 10 m/s, however it's displacement over that time would be zero for a net velocity of zero.
How would increasing the magnitude of the charges on two charged particles and decreasing the distance between the particles affect the strength of the electric force between the particles?
We know the formula
F=kq1q2/rSo
if magnitude of charge is increased the force between them also increased.
And if the distance between them is decreased them also the force will be increased.
So Force increases
Air masses that form over continents in source regions that are cold are called__________.
Group of answer choices:
continental tropical (cT)
maritime tropical (mT)
maritime polar (mP)
continental polar (cP)
Answer:
Continental polar.
Explanation:
it should be a continental polar air mass because, it is cold.
The frequency of a wave is 0.05 Hz and the wavelength is 20 m. What is the velocity of the wave?
Answer:
1m/s
Explanation:
wave velocity=frequency × wave length
=0.05 × 20
=1 m/s
