Explanation:
Using Equations of Motion :
[tex] {v}^{2} = {u}^{2} + 2as[/tex]
[tex]a = \frac{{v}^{2} - {u}^{2}}{2s} = \frac{400 - 0}{70} = 5.71msec^{ - 2} [/tex]
Which example best represents balanced forces? an elevator stopped on the third floor a basketball shot into a hoop a sled sliding down a snowy hill a tow truck pulling a car out of a ditch
Answer:
an elevator stopping on the third floor
Explanation:
The example that best represent balanced force as regards this question is an elevator stopped on the third floor.
Balanced force can be regarded as resultant force that has a magnitude of zero when acted on an object. When forces that are been subjected on a body are zero then the force is balanced.In the case of the elevator, immediately it stopped at a particular floor, then it will gave a balanced force, because at that point all forces acting on it becomes zeroWhen a car is pushed from a ditch , the force is acting from a side so its not balancedExamples of balanced forces are;
The weight of object as well as normal force acting on it can be regarded as been balanced.When pushing a car at both opposite sides with the same forces.A lizard that hangs in vertical position.Therefore option A is correct, because balanced force exist as the elevator stopped.
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Which is directly proportional to your weight on a planet's surface?
A. Only the mass of the planet
B. The distance from the surface to the center of the planet
C. Only your mass
D. Your mass and the mass of the planet
Answer:
D your mass the mass of the planet .
Explanation:
Answer: your mass and the mass of the planet
Explanation:
HELP ME PLZ ASAP ITS DUE ON MONDAY
Answer:
the answer in the paper
Answer:
5a. 11m, 5b. 16m, 5c. 9m, 5d. 7m 6a. 3m, 6b. 0m, 6c. 2m, 6d. 5m
Explanation:
I hope this helped and plz make brainliest!
A biker accelerates from rest to 10 m/s in 5 seconds. What is the biker's
acceleration? Calculate for the missing variable
Your answer
Answer:
It starts from rest so Vi=0
Vf=10 m/s
t=5 seconds
Explanation:
a=Vf-Vi/t
a=10-0/5
a=10/5
a=2m/s^s
Human activities can have positive and negative effects on the environment Humans can benefit natural areas by CA throwing waste products in these areas. B. removing all the vegetation from these areas. c. polluting the areas by burning fossil fuels. D. preserving the natural resources that they provide
Answer:
D
Explanation:
Clearly you can't help the environment by throwing waste in the area, polluting it, or burning it all up, so D would be our only option.
Have a good day :)
A horse is grazing for food. It trots rightward 15 m to eat a carrot, then walks rightward 20 m, to another carrot, then turns leftwards to walk 4m, to bite an apple. The horse walks a total time of 74 seconds. What is the magnitude of its average velocity?
(** HINT- you may want to draw this out, remember with VELOCITY direction matters-opposite vectors cancel out-with SPEED direction does not matter).
Answer:
0.42sExplanation:
Velocity = Displacement/time
Displacement of the horse is the distance covered in a specified direction
Total distance of the horse towards the right = 15m + 20m = 35m
Total distance of the horse towards the left = 4m
Displacement = Distance towards the right - Distance towards the left
Displacement = 35m-4m
Displacement = 31m
Time taken = 74seconds
substitute the values gotten into the velocity formula
average velocity = 31m/74s
average velocity = 0.42m/s
Hence the magnitude of its average velocity is 0.42s
Which of the following is most likely to happen when energy is transferred to an object A) the object will stay exactly the same B)The object Will begin to move C)the force on the object will decrease D) the mass of the object will increase
Answer:
B. the object will begin to move
Explanation:
If energy is transferred the object will definitely change so it CANNOT be "A". If you add energy the object will have more force so it CANNOT be "C". The mass of an object can't increase just by giving an object energy so it CANNOT be "D"
When energy is transferred to an object, the object is most likely to move either it gains a kinetic energy or it undergo a thermal vibration if thermal energy is applied.
What is energy transfer?Energy can be transferred from its high energetic area to less . All forms of energy can be transferred like this.For example, heat energy can be transferred through various modes such as conduction, convection, radiation etc.
When an object gain some energy its particles starts to vibrate and move apart. This makes the intermolecular force of attraction between molecules weaker than before and they tend to be more reactive.
The energy transferred to an object does not make any change in mass, or any of its innate properties or does not apply any force. Therefore, option B is correct.
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compare the advantages and disadvantages of converting our system of measurement in the united states from the English system to the international system of units
Answer:
This is required answer.
Explanation:
Given that,
The advantages and disadvantages of converting our system of measurement in the united states from the English system to the international system of units
The difference between SI units and english system units.
SI systems,
The SI system uses metre, kilogram and second.
English system,
The english system uses yard, foot, cubit, mile, quart, pint, gallons, etc.
We need to find the comparison between system of measurement in the united states from the English system to the international system of units
Advantage :
The most advantage of SI unit is that it has only one unit for each quantity. It means, it is never needed to change from one unit to another unit and here is no changing factors for students to memorize.
Disadvantage :
The most disadvantage of english system is that it has more unit for each quantity. It means, it is needed to change from one unit to another unit and here is changing factors most for students to memorize.
Hence, This is required answer.
Transitioning to the International System of Units (SI) offers global standardization, simplicity, and consistency in measurements, promoting scientific accuracy and ease of communication. However, the process involves costs, potential resistance to change, and considerations of cultural and practical factors that need to be carefully addressed for a successful conversion.
Here's a comparison:
Advantages of converting to the SI system:
1) Global Standardization: The SI system is the most widely used system of measurement worldwide, ensuring uniformity and ease of communication in international trade, science, and engineering.
2) Simplicity and Coherence: The SI system is based on a decimal system, making conversions between units straightforward and logical.
3) Consistency and Interchangeability: SI units are based on well-defined standards and physical constants, providing a consistent and unambiguous way to express quantities, and improving the accuracy and reliability of measurements.
4) Learning and Education: Adopting the SI system in education can simplify the learning process for students and facilitate the understanding of scientific concepts, promoting scientific literacy.
5) Compatibility with Technology: The SI system is compatible with modern technology and scientific instruments, enhancing the accuracy and precision of measurements.
Disadvantages of converting to the SI system:
1) Transition Costs: Implementing a change in the entire measurement system can be costly, requiring new standards, education, and recalibration of equipment and infrastructure.
2) Resistance to Change: People who are familiar with the English system may initially resist adopting the SI system, leading to a learning curve and potential confusion during the transition.
3) Cultural Factors: The English system has been ingrained in the culture and everyday life of the United States, and some may argue for preserving the historical tradition of the system.
4) Potential Loss of Precision: In some cases, the SI system may result in rounded or approximated measurements, leading to potential loss of precision compared to the English system.
5) Mixing Units: During the transition period, there might be a mix of both systems, leading to potential errors or misunderstandings when using different units.
In summary, transitioning to the International System of Units (SI) offers global standardization, simplicity, and consistency in measurements, promoting scientific accuracy and ease of communication.
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A car, initially traveling 24.0ft/s, steadily speeds up to 58.0ft/s in 5.40s. Determine all unknowns and answer the following question.
How far did the car travel during this time?
Answer:
acceleration = 6.29 ft^2/s
distance traveled by car = 405 ft
Explanation:
formula 1 : u = v - (a*t)
where u = initial velocity
v = final velocity
a = acceleration
t = time.
solving for acceleration.
24 = 58 - (a*5.4)
a = (58 - 24)/ 5.4
a = 340/ 54 = 6.29 ft^2/s
formula 2: v = d/t - (a*t/2)
58 = d/5.4 - ((340*54)/20)
d = 405 ft
All of the following devices tiſansmit energy/information: cell phones, walkie talkies, remote
controls, and sunlight. Which statement is true regarding these transmissions?
Answer:
All of the following devices transmit energy/information: cell phones, walkie talkies, remote controls, and sunlight.
They are all radiation.
I got a 100 on this test.
1. consider the free body diagram. If the sum of the tension forces is equal to the force of gravity, which description BEST applies?
answer. A girl hangs by both hands, motionless, from a trapeze.
2. What causes sea floor spreading ?
answer. Magma.
3. 10 n -> (BOx) <- 20 n Which expression represents the total force on the block ?
answer. 10n =+ -20n.
4. Which waves move by replacing one particle with another?
answer. Sound waves.
5. The table shows dates and appearance of index fossils. Which rock layers can be dated most precisely?
answer. a layer containing both a fossil from 1 and 2
This is an illustration of the ___ moon
answer. new.
hope these help
which expression correctly describes energy using SI units
Answer:
Joule
Explanation:
energy, work, quantity of heat
m2·kg·s-2
Is It true that if you drop a heavy object and a lighter object at the same time, they will both drop at the same time due to gravity?
Answer:
[tex]\huge\boxed{True.}[/tex]
Explanation:
This is true because gravity is independent of mass. Whether it's a heavy or a light object, when dropped, they both will hit the ground at the same time. The reason is that gravity does not depend on mass.
Hope this helped!
~AnonymousHelper1807hey can anyone help me out pls!
If you try to squish a table it aint gonna move. That is because,
C. They are packed closely together.
A isn’t true.
B is true, they do vibrate, but that is NOT the reason why it doesn’t change when pressure is applied.
D is wrong because C is correct.
If i wanted to determined what part of your brain that you needed not just used in order to respond to the sound of your voice which brain analysis technique should i use
Answer:
The brain analysis technique which allows for identifying which part of the brain is functional per human activity is Neuroimaging.
Explanation:
Brain Imaging (or Neuroimaging) involves the use of direct observation in a living organism of the structure, function and anatomy of its central nervous system.
Cheers!
Jennifer works for an automaker and tests the safety performance of cars. She watches a 2,000-kilogram car crash into a wall with a force of 30,000 newtons. What’s the acceleration of the car at impact? Use F = ma.
The answer is a = 15 m • s - 2.
Answer:
A
Explanation:
During an experiment, a student moved a cell from pure water to salted water. What will most likely happen to the cell?
Answer:
During an experiment, a student moves a cell from pure water to salted water. ... It will release water and shrivel. It will release water and burst.
Where mud you be standing if the Sun appears to be directly overhead at noon
Answer:
A
Explanation:
Bile helps in the digestion of —————-
Answer:
Bile helps in the digestion of fats
it takes 1.4 minutes for Jonny to get to class which is a distance of 82 meters away s. what is Johnny’s average speed in seconds?
in your ans
A jogger runs the first 250 m of a race in 13.5 sec. What is the jogger's
velocity(m/s)?
Answer:
S=250 m
t=13.5 sec
V=?
Explanation:
V=S/t
V=250/13.5
V=18.51m/s
PAGE 29
Q. 1. What is meant by power of accomodation of the eye?
This is the process of changing the shape of the eye lens to focus on near or distant objects.
How many significant figures?
5.0001
O None of these are correct
O 5
02
0 1
5
if zero falls between two significant numbers it becomes significant.
As the earth rotates through one revolution, a person standing on the equator traces out a circular path whose radius is equal to the radius of the earth (6.38×10^6). What is the average speed of this person in meters per second? If we are standing in latitude 43° north what is our average speed?
Answer:
The average speed will be "1038 mph".
Explanation:
Period for one revolution is:
T = 24 hours
= 86,400 sec
x = c = 2πr
The given values is:
r = 6.38×10⁶ m
Now,
⇒ [tex]T=\frac{2 \pi r}{v}[/tex]
Or,
⇒ [tex]v=\frac{2 \pi r}{T}[/tex]
On substituting the values, we get
[tex]=\frac{2 \pi (6.38\times 10^6)}{86,400}[/tex]
[tex]=464 \ min/sec[/tex]
[tex]=(464 \frac{min}{sec}) (\frac{3600 \ sec}{1 \ hour} )(\frac{1 \ mi}{1609 \ m} )[/tex]
[tex]=1038 \ mph[/tex]
what is 6,000 in scientific notation
6,000 in scientific notation is 6 x 10^3.
6 x 10^3 = 6,000
Hope this helps ! <3
What is the phase of water when its temperature is 150 °C?
Horizontal line on a position time graph indicate that the object is
The position- time graph of an object gives the velocity of the object. If the graph shows a horizontal line along the x axis, the object is stationary.
What is velocity?Velocity of an object is a physical quantity measuring the distance covered per unit time. It is a vector quantity and thus have a magnitude and direction. Velocity is thus, the ratio of change in distance to the change in time.
v = dx/dt.
A moving object is always associated with certain velocity. Which can be constant or changing. The plot of position v/s time gives the change in position with respect to time. Thus, velocity can be calculated from this.
If the position -time graph shows a horizontal line means there is no change in distance with time and the velocity of the object is zero. Thus, the object is stationary or at rest.
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SOMEONE HELP ME SOLVE (A, B, C, D, E, F) WILL MARK BRAINLIEST the first page shows an example!!
Answer:
Its C
Explanation:
Complete the paragraph to describe binary systems. A binary star system is made of (blank) stars, one of which is brighter than the other. Astronomers are able to detect the dimmer star because its gravity causes the bright star to (blank). Astronomers can also spot the dimmer star by observing a phenomenon called a(n) (black) binary. This happens when the dim star passes in front of the bright star.
Answer: two, wobble, eclipsing
Explanation: I am watching the video now
Answer:
Two Wobble eclipsing
Explanation:
I got it right on the Assignment. :)
What force is needed to accelerate a 90 kg punching bag 13 m/s2?
Answer:
The answer is 1170 Newton
Explanation:
Force =. Mass × Acceleration
= 90 × 13
= 1170 Newton
Cuál es el método que utiliza el factor de la gravedad y la difusión de un líquido sobre un sólido para separar las partes de una mezcla de varios líquidos mezclados entre sí
Answer:
chromatography
Explanation:
Chromatography is one of the powerful technique that is used to separate the mixed components of liquid or the gas mixtures.
In this technique the separation of the mixture by passing the mixture in some solution or some suspension through the medium where the components are made to move at some different rates.
The basic idea in this experiment is that the mixture sample is in mobile phase and it is forced either by pumping or by gravity or by capillary action through the stationary phase to separate the mixture.