Answer:
d = 493.72 m
Explanation:
Given that,
Initial velocity of the train, u = 80 km/h = 22.22 m/s
Acceleration of the train, a = -0.5 m/s² (negative as it slows down)
Finally brakes are applied, v = 0
We need to find the distance the train travels. Let the distance be d. Using third equation of kinematics to find it.
[tex]v^2-u^2=2ad\\\\d=\dfrac{v^2-u^2}{2a}\\\\d=\dfrac{0^2-(22.22)^2}{2\times (-0.5)}\\\\d=493.72\ m[/tex]
So, the required distance is equal to 493.72 m.
What is the length of the y-component of the vector plotted below?
Answer:
A.1
Explanation:
on the vector plot you should count up and if you count up you´ll get one
The length of the y-component of the vector plotted in the given question would be 1. Thus, the correct option is A.
What is a vector plot?A vector field can be defined as an assignment of a vector to each point in the subset of space. For instance, a vector field in the plane can be easily visualized as a collection of arrows with a given magnitude and direction of a particle, each line or arrow attached to a point in the plane of space.
Vector plots are used to create vector lines between any two points or from one point in space to the specified angle direction and with the selected magnitude and direction of the quantity or quality.
In the given graph, the Y-component is the vertical line or vertical component. The value of the y-component of the vector plotted is 1.
Therefore, the correct option is A.
Learn more about Vector here:
https://brainly.com/question/29740341
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Which of the following can act
as media for a wave?
A. Solids
B. Liquids
C. Gases
D. All of the above
Answer:
D
Explanation:
im pretty sure
Identifying Obstacles
Since the purpose of these strategies is to help overcome obstacles and set-backs in your exercise routine, take a minute and think about the most obvious obstacle you have. If you do not have any obstacles at the present time, think about a potential obstacle to your exercise that could occur.
Answer:
Thx!
Explanation:
Explain how tangential speed depends on distance.
Which layer of the earth is the thickest?
A) Crust
B) Mantle
C) Outer core
D) Inner core
C) OUTER CORE
IT IS THE THICKEST
A 110 kg fire-fighter descends down a pole. He experiences 530N of
friction.
d. Determine the fire-fighters weight
e. Draw an FBD
f. Determine the Fnet
define the concept national building
A rock is dropped from a sea cliff, and the sound of it striking the ocean is heard 2.9 s later. If the speed of sound is 340 m/s, how high is the cliff?
Answer:
h = 493 m
Explanation:
Given that,
A rock is dropped from a sea cliff, and the sound of it striking the ocean is heard 2.9 s later.
The total distance covered by the rock is 2d. We know that,
Speed = distance/time
[tex]v=\dfrac{2d}{t}\\\\d=\dfrac{vt}{2}\\\\d=\dfrac{340\times 2.9}{2}\\\\d=493\ m[/tex]
So, the height of the cliff is equal to 493 m.
What is force? Do systems have inputs, outputs, do they have both, do they have one, do they have the other, what are the systems.
a force is a push or pull. hope i helped!
1. Name two ways of applying forces ?
Answer: A force can be applied to another object by a direct push, pull, or drag.
Explanation:
Answer:
pushing ,pulling and dragging
What is required for the heat to flow from one object to another?
Uniform temperature
Uniform density
Temperature difference
Density difference
Answer:
Explanation:
The answer is Temperature difference
Answer:
C
Explanation:
is the answer ,..........................
Which of the following statements best describes the function of the muscular system?
A. Provides a way for the body to rid itself of waste in the form of gas, liquid or a solid.
B. Provides the body essential minerals needed to maintain homeostasis.
C. Provides movement of limbs, blood vessels, digestive organs and cardiac muscle.
D. Provides movement for the human body.
Explanation:
A is excretion
B is digestion
so my guess is c
What is it called when two waves combine to form a new wave?
Answer:
interference
Explanation:
You can just search this.
What is the wave speed of a wave that has a frequency of 100 Hz and a wavelength of 0.30 m?
Answer:
Explanation:Wave speed = 100 ×0.50 meter per second . Wave speed = 50 meter per second .
Segregation of alleles happens during the sex cell formation called ___.
A. translation
B. meiosis
C. sexual reproduction
D. transcription
Answer:
The answer to your question is sexual reproduction
Explanation:
Mark me brainliest (WHY?) cause my answer is correct
Question 20
When energy is added to a wave, how can the wave change? Select all that apply
А
The frequency can increase.
The wavelengin can inc
С
The frequency can decrease.
D
The amplitude can decrease.
E
The wavelength can decrease.
F
The amplitude can increase.
Answer:
I would say A, I hope this helped ; >
A 1.0-kg block of aluminum is at a temperature of 50°C. How much thermal energy will it lose when its temperature is reduced by half? The specific heat of aluminum is 897 J/(kg •K).
Answer:
22425 J
Explanation:
From the question,
Applying
Q = cm(t₂-t₁).................. Equation 1
Where Q = Thermal Energy, c = specific heat capacity of aluminium, m = mass of aluminium, t₂ = Final Temperature, t₁ = Initial Temperature.
Given: c = 897 J/kg.K, m = 1.0 kg, t₁ = 50 °C, t₂ = 25 °C (The final temperature is reduced by half)
Substitute these values into equation 1
Q = 897×1×(25-50)
Q = 897×(-25)
Q = -22425 J
Hence the thermal energy lost by the aluminium is 22425 J
observation?
patulong po plss
Answer:
Magnetic field patterns of two permanent magnets.
Explanation:
From the attached picture, it can be observed that iron filings has been caused to align with respect to the magnetic fields of permanent the magnets. The concentration of the filings at some definite spots shows the poles of the magnet. This forms a magnetic field pattern.
This simply illustrates the effect of magnetic fields on iron filings by placing magnets below a paper or cardboard with iron filings on the top of the paper. The magnetic field pattern would be lost if the magnets are removed.
can u get this right?
what is a plane mirror? state the characteristics of the image formed by a plane mirror
A student looks at the image of a ball rolling down a ramp. The image shows four different positions for the ball Use this image to answer Questions 4–5 are attached.
The law of conservation of energy states that energy is always conserved, and cannot be destroyed.
At the top of the hill, the ball is at the maximum height. Because the equation for gravitational potential energy is ([tex]U_{g}[/tex] = mgH), we can safely conclude that the GPE at A, the top of the hill, is the greatest in all 4 options.
Now, what about Kinetic Energy? Recall the law of conservation of energy. At the point where Gravitational Potential Energy is the lowest, Kinetic Energy will be the highest. Total energy is always conserved, and so it is logical that KE will increase to compensate for GPE decreasing. Therefore, we know that at point C, the ball will have the greatest Kinetic Energy. Because this point is the lowest point in the hill, the ball will have the lowest possible GPE and therefore the largest possible KE out of the 4 options.
4. A
5. C
If you're still confused or would like me to explain this further, just ask!
- breezyツ
What is the solution to unit for measuring electric current?
Answer:
The SI unit for electric current is Ampere (A)
Is it possible to get more work out of a machine then you put in yes or no?
Answer:
i think its possible yes
Explanation:
Kara started a new exercise program. Kara’s sister works out with her on a regular basis and even talks to Kara about her progress. In this scenario, what is another name for Kara’s sister?
A.
goal-setter
B.
self-monitor
C.
support system
D.
nutritionist
explain how a syringe draws injectable drug from a bottle
Answer:
When we pull the piston from inside to outside, a suction is created between the liquid and piston. This causes the liquid to move upwards and this allows us to draw a drug from a bottle
Explanation:
A ball has a 17 J of kinetic energy and its mechanical energy ls 25 Joule.
a. Find the gravitational potential energy of the ball.
Question:
A ball has a 17 J of kinetic energy and lB mechanical energy is 25 Joule
a. Find the gravitational potential energy of the ball.
b. if the ball has a mass of 3.2 kg, what is its height above the ground?
c. What is the speed of the ball?
Answer:
a. = 85
b. h = 0.25 m
c. = 3.26 m/s
Explanation:
Part A
PEgrav = m ו g • h
In the above equation, m represents the mass of the object, h represents the height of the object and g represents the gravitational field strength (9.8 N/kg on Earth) - sometimes referred to as the acceleration of gravity. So, to find:
GPE = ME - KE = 25 - 17 = 85
Part B
The formula simplifies to: h max = h + V₀² / (2 × g) and the time of flight is the longest.
The vertical velocity is equal to 0 (Vy = 0), and that's the case of horizontal projectile motion.
The equation may be written as:
GPE = mgh
8 = 3.2 × 10 × h
h = 0.25 m
Part C
The ball speed is calculated by dividing the distance by the time. If the time was 3 seconds, the average speed will be 60/3 = 20 feet per second (6.1 m/sec). KE = 1/2 MV²
17 = 1/2 × 3.2 x V²
V = 17 ÷ 1.6
Note, this is only the average ball speed, the speed of the ball at the time of release would be greater.
What is directly created when radiation from the Sun heats air in the atmosphere?
erosion
humidity
precipitation
wind
Answer:
Wind
Explanation:
I had this question on one of my tests, and I got it right
A mercury in barometer shows a height of 70cm.What height would be shown in the barometer at the same place if water density 1.0×10³kg/m³ is used(denssity of mercury=13600kgm-³)
Answer:
P = d g h pressure due to density of liquid of height h
d1 g h1 = d2 g h2 since P1 equals P2
d1 h1 = d2 h2 and the density of Hg is 13.6 times that of water
h2 = (d1 / d2) * h1 = 13.6 * 70 cm = 952 cm or 9.52 m
Which term describes a long-term weather pattern?
air mass
climate
humidity
front
Answer:
Explanation:
The answer is Climate
Answer:
climate
Explanation:
Climate is defined as an area's long-term weather patterns. The simplest way to describe climate is to look at average temperature and precipitation over time.
What is velocity ratio? It is impossible to get a perfect machine in practical life, why?
Explanation:
VELOCITY RATIO :- The ratio of a distance through which any part of a machine moves to that which the driving part moves during the same time.