Answer:
infrasound
Explanation:
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
50 POINTS! I PROMISE BRAINLIEST IF PLEASEEE I NEED HELP!
Choose the force diagram (freebody diagram) that best represents the forces acting on the object.
The effects of air resistance are negligible. (5 points)
A plate that is at rest on the kitchen table:
Answer:
Diagram B because a plate resting on a table has gravity acting on it and normal/air resistance force working against the gravity with the same amount of force. Forces that are balanced don't move.
Explanation:
I hope this helps
Diagram B represents the forces acting on the plate that is at rest on the kitchen table.
What is normal force?Every day, we experience the normal force.
In this instance, when we lay a plate on a kitchen table, the normal response force prevents the plate from going through the table, even if gravity is pulling the plate downward. That implies that there is a force acting to push it upward. The word "normal force" refers to the force. Normal in this context refers to being perpendicular to the ground.
Hence, in diagram B, downwards arrow represents gravitational force acting on the plate for its weight and upwards arrow represents normal force acting on the plate by the table.
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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.
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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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/sCan 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! :)
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:
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:QUESTION 1
1.1 Define the term acceleration in words
Answer:
To be better at something
Explanation:
I have Accelerated at cooking
Answer:
Acceleration means to speed up
Explanation:
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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Describe the electric and magnetic fields of an electromagnetic wave.
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.
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
what is an example of digital signals?
Examples of digital signals are Computers, Digital Phones, Digital pens, etc.
What is signal?Signal is defined as an electromagnetic wave that carries information through a medium. In this, the data is converted into electromagnetic signal which may be analog or digital and then sent from sender to receiver.
Signal which are discrete are known as digital signals.
Examples of digital signals are Computers, Digital Phones, Digital pens, etc.
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Answer:
Examples of digital signals are Computers, Digital Phones, Digital pens, etc.
A digital signal is a signal that represents data as a sequence of discrete values. A digital signal can only take on one value from a finite set of possible values at a given time. With digital signals, the physical quantity representing the information can be many things: Variable electric current or voltage.
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 .
The tape timer used in this experiment marks the paper tape with dots at fixed time intervals. How does it do that?.
The ticker tape is pulled through the timer once it's powered, which creates a dot along the length of this paper tape at fixed time intervals.
What is a ticker timer?A ticker timer can be defined as a scientific apparatus that is designed and developed to measure time in seconds. Thus, a ticker timer can be used to measure short intervals of time by making dots on a paper tape at regular (fixed) intervals.
By design, a ticker timer comprises a magnet, carbon paper disk and a ticker tape which is pulled through the timer once it's powered, so as to create a dot along the length of this paper tape at fixed time intervals.
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Pulling up on a rope, you lift a 9.27-kg bucket of water from a well with an acceleration of 1.20 m/s2. Part A What is the tension in the rope
a 60-w light bulb radiates electromagnetic waves uniformly in all directions. at a distance of 1.0 m from the bulb, the light intensity is i0, the average energy density of the waves is u0, and the rms electric and magnetic field values are e0 and b0, respectively.
Answer:
Explanation:
1. If we increase the distance to twice it's original value, the light intensity is reduced by one-fourth, the light intensity would be:
I0/4
2. rms magnetic field is inversely proportional to distance, so the new rms magnetic field would be:
B0/2
3. average energy density is inversely proportional to the square of the distance, so the new average energy density is:
E0/4
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?
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
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
What related fitness components are improved in dancing?
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 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:
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.
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.
▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃
⠀
⠀
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]
▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃
⠀
⠀
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]
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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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
