Answer:
definition: the moving of something from its place or position.
Explanation:
though moving around a track they will always end in the same place therefore there is no displacement from the beginning position
There is no displacement from the starting position because they will always wind up in the same place as they started.
What is displacement?Displacement is defined as the overall alteration of an object's location and motion direction. Displacement is recognized as a vector quantity since it takes into account both the direction of the motion and the magnitude of the changing position. Displacement may be zero, positive, or negative.
The initial and final positions are needed in order to calculate displacement because displacement does not provide comprehensive information on the full path length.
The displacement is the shortest distance from the starting point to the finish point, the athlete starts from the start line and reaches the finish line after running through the whole track, but the starting point and the finishing point are the same, so the displacement is zero.
Therefore, the displacement of the athlete running through the track is zero for a complete race.
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A Yugo can accelerate from rest to a speed of 28 m/s in 20 s. What is the average acceleration of the car? What distance does it travel in this time
Answer:
Explanation:
a=28/20
a=1.4 m/s²
V²=v0²+2a.D
28²=0+2x1.4D
784 = 2.8D
D = 280 m
What resistance does a 25 W light bulb have if 12.6 V is applied to it?
(3 marks)
Answer:
Explanation:
W = 25 Watts
V = 12.6 Volts
I = ? I is the current in amperes.
Solution
25 = 12.6 * I
I = 25 / 12.6
I = 1.98 amperes
V = 12.6
I = 1.98
R = ??
V = I * R
12.6 = 1.98 * R
R = 12.6 / 1.98
R = 6.35 ohms
A bus slows down uniformly from 71.2 km/h
to ( km/h in 22.3 s.
How far does it travel before stopping?
Answer in units of m.
Answer:
1 km = 1,000 meters
Explanation:hey im in 7th grade and even i know that.i sorry but you seem not the smartest.jk thats a good question
can a system have kinetic and potential energy at the same time
Answer:
yes
Explanation:
...........................
helppppppppppppppppppppppp
Explanation:
v²= u² + 2as
v= final velocity.
u= initial velocity.
a= acceleration.
s= distance.
Did anyone have any clue about this question
The two characterists of stars shown on an H-R diragram are absolute brightness
and
Surface temperature im quite certain
A hammer falls from a construction worker's hand 30m above the ground at the same time that a filled soft drink can is projected vertically upward from the ground at a velocity of 24 m/s. Where and when will the two objects meet?
For harmer:-
initial velocity=u=0m/sAcceleration due to gravity=10m/s^2Now
[tex]\\ \sf\longmapsto s=ut+\dfrac{1}{2}gt^2[/tex]
[tex]\\ \sf\longmapsto s=0t+\dfrac{1}{2}(10)t^2[/tex]
[tex]\\ \sf\longmapsto s=5t^2\dots(1)[/tex]
For soft drink:-
u=24m/s[tex]\\ \sf\longmapsto 30-s=(24)t+\dfrac{1}{2}(10)t^2[/tex]
Using eq(1)[tex]\\ \sf\longmapsto 30-5t^2=24t-5t^2[/tex]
[tex]\\ \sf\longmapsto 24t=30[/tex]
[tex]\\ \sf\longmapsto t=\dfrac{30}{24}[/tex]
[tex]\\ \sf\longmapsto t=1.2s[/tex]
After 1.2s they will meet.Now
putting t in eq(1)
[tex]\\ \sf\longmapsto s=5t^2=5(1.2)^2=5(1.44)=7.2m[/tex]
At the height of 7.2m they will meet
uses of concave and convex mirror
hello?
Explanation:
→ Uses of Convex Mirror
• Convex mirrors are often used in the hallways of buildings including stores, schools, hospitals, hotels and apartment buildings.
• They are used in driveways, roads, and alleys to provide safety to all the bikers and motorists at curves and turns and other places where there is a lack of visibility.
• They are also used in some automated teller machines as a handy security feature that allow user to see what all is happening behind them.
• They are used in passenger side mirror on a car and somewhere it is labelled as “objects in mirror are closer than they appear” to warn the driver.
→ Uses of concave mirror :
• Head mirrors
• Shaving mirrors
• Headlights
• Ophthalmoscope (optical instrument)
• Solar furnaces
• Astronomical telescopes
An___ is a pure substance that cannot be separated into any other substance
3.1 Two waves A and B have frequencies 256 Hz and 1024 Hz respectively have amplitude in ratio 3:1 1.What is their ratio of frequencies? Which wave represents a higher pitch
2.which sound is louder
Answer:
1. the one with the raito
2. the one that stubbed their toe
Explanation:
state the general relationship between temperature and water depth.
Answer:
Temperature decreases as depth increases (generally)
Explanation:
In general, sunlight will heat the upper level of water. As you go deeper into the water, the sunlight cannot reach as easily so the temperature is lower.
There are exceptions considering underwater currents like the Gulf Stream or volcanic vents.
Which phrase describes speed? A. A quantity with direction only B.A vector quantity C.A scalar quantity D.A quantity with no units
Answer:
C. A scalar quantity
Explanation:
Speed does not have a direction. Speed with a direction is known as velocity.Vector quantities are quantities with magnitude and direction. As stated before, speed does not have a direction.Speed has a SI unit of m/s (meters per second).Therefore, the answer is C.
PLEASE ANSWER ASAP! <33 When the computer you are working on uses energy it also produces waste energy. What type of energy is this waste energy?
Chemical Energy
Thermal Energy
Answer:
thermal energy
Explanation:
computer produce thermal energy later brought out by exhaust fans...
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what is magnetic force?
i
Answer:
The force by which a substance (magnet) attracts a body(metals) towards it is called magnetic force
Answer:
Magnetic force, attraction or repulsion that arises between electrically charged particles because of their motion. The magnetic force between two moving charges may be described as the effect exerted upon either charge by a magnetic field created by the other.
Explanation:
Hope this helps you. Please mark as brainliest. It helps a lot. :)
What is the meaning of Rusting Of Iron
Plz help me
Answer:
an oxidation reaction i think that's the answer
Explanation:
Explanation:
Rusting of iron refers to the formation of rust, a mixture of iron oxides, on the surface of iron objects or structures. This rust is formed from a redox reaction between oxygen and iron in an environment containing water.
Hope this helps!!
Have a blessed day <33
Convert milligram to 1 gram
Answer:
convert 1 milligram to 1 gram:
Explanation:
1 milligram is 0.001 gram.
so... 2 milligram is 0.002
3 milligrams is 0.003
and so on.
Write down the relation between force pressure and area
Answer:
Answer: Pressure is directly proportional to force and inversely proportional to area.
Explanation: Pressure is defined as the ratio of force applied to the area of cross section.
Mathematically,
P=\frac{F}{A}P=
A
F
where,
P = Pressure
F = Force applied
A = Area of cross-section
from above it is visible that pressure is directly proportional to the force applied which means that if force increases, pressure increases. It is also inversely proportional to the area of cross-section. So, when area of cross-section increases, pressure decreases.
The units of pressure are N/m^2N/m
2
and S.I. units for this term is Pascal (P).
what 3 things are produced as a result of the fusion of two atoms
Answer:
Electron, proton and neutron
Explanation:
In each and every atom they are consist of electron, proton and neutron.
A lightbulb uses 2,000 J of energy in 1 min and 20 s. What is the power of the lightbulb?
Answer:
ga tau gw ah binatang aje
i’m not sure if it’s A or B
Two balls are dropped from rest and allowed to fall. If one ball is allowed to fall for 1 s and the other for 3 s compare the distances they have fallen.
The second ball traveled a greater distance when compared to the first ball because the second ball spent more time in motion.
The given parameters;
time of fall of the first ball, t = 1 stime of fall of the second ball, t = 3 sThe distance traveled by each ball is calculated using the second equation of motion as shown below.
The distance traveled by the first ball is calculated as follows;
[tex]h = u_0t + \frac{1}{2} gt^2\\\\h = 0 + \frac{1}{2} gt^2\\\\h = \frac{1}{2} gt^2\\\\h = (0.5\times 9.8\times 1^2)\\\\h = 4.9 \ m[/tex]
The distance traveled by the second ball is calculated as follows;
[tex]h = \frac{1}{2} gt^2\\\\h = (0.5\times 9.8\times 3^2)\\\\h = 44.1\ m[/tex]
Thus, the second ball traveled a greater distance because it spent more time in motion.
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Changing classes, you walk 20.0 m down a hall, turn left, and then walk 10.0 m down another hall. Define a coordinate system and sketch the displacement vector. Also, sketch the displacement components, and then determine the vector's magnitude.
Explanation:
Calculate position vectors in a multidimensional displacement problem. Solve for the displacement in two or three dimensions. Calculate the velocity vector
which planet has a moon with many sulfur volcanoes?
Jupiter i hope it is right answer
what is another name for the magnitude of the velocity vector
Answer:dddddddddddddddddddd
Explanation:
A 100 kg physics teacher pushes a 1.0 kg physics textbook across a 222 kg physics demo table. The teacher applies 5.0 N of force to start the book sliding and 4.0 N to keep it sliding at a constant 0.30 m/s across the table.
Sketch a free body diagram showing all the forces acting on the book as the teacher pushes it.
1 . What is the magnitude of the weight of the book?
2. What is the magnitude of the normal force of the table on the book?
4. What is the coefficient of static friction between the book and the table?
5. What is the coefficient of kinetic friction between the book and the table?
6. If the teacher stops pushing the book, what is the magnitude of the net force on the book?
7. What acceleration does the book have after the teacher stopped pushing it?
8. How far does the book slide before coming to rest?
Answer:
1) 1kg
2) 9.81kg
4) 5N
5) 4N
6) 0N
7) 0N
8) 13
Explanation:
a typical 100-watt light bulb consumes 100 j of energy per second. if a light bulb converts all of this energy to 400 nm light, how many photons are produced each second?
Answer:
Let y equal lambda the wavelength of the light
e (photon) = h f = h c / y
e = 6.63E-34 * 3.0E8 / 400E-9
e = 6.63 * 3 / 400 * 10^-17
e = 4.97E-19
N= 100 J/sec/ 4.97E-19 J = 2.01E20 / sec
15. How many neutrons are in the nucleus of an atom that has an atomic mass of 36 and an
atomic number of 25
will give correct answer brainliest
Which factors below will increase the momentum of a rolling ball of constant mass m? (Select only the answers that will increase the momentum of the ball.) Moving from a flat surface to moving downhill. Colliding with a ball of much lower mass moving in the opposite direction of the ball. A moving object traveling in the same direction as the ball colliding with it. Rolling uphill onto an inclined surface. Rolling onto a surface with high amounts of friction with the ball.
In order to increase the momentum of the ball, you have to increase its speed.
The first and third choices on the list ('A' and 'C') will do that.
The factors that will increase momentum of a rolling ball are:
A. Moving from a flat surface to moving downhill.
C. A moving object traveling in the same direction as the ball colliding with it.
Factors that increase momentum:The gravitational power of the Earth ready makes the ball speed up, and in this manner pick up speed.
If you increase either mass or velocity, the momentum of the object increases proportionally.
Thus, the factors that increase the momentum of a rolling ball are
A. Moving from a flat surface to moving downhill.
C. A moving object traveling in the same direction as the ball colliding with it.
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will the star of bethlehem be visible on december 21st
Answer:
The best time to view the spectacle on Dec. 21 will be around an hour after sunset.