why displacement has a fixed direction and change in position
Answers
The position of an object is where it sits on the number line. When the object moves to another position, its displacement is the second position minus the first position.
Δ x = x2 − x1
The word displacement implies we keep track of which way the movement occurs. In one dimension the direction is indicated by the sign: negative if to the left and positive if to the right. The word distance means how far the object moves regardless of direction. It is always positive and is equal to the absolute value, or magnitude, of the displacement.
If one follows the rule of always subtracting the first position from the second, the sign always works out to be positive if the displacement is to the right and negative if the displacement is to the left.
Related Questions
What is electrical resistance and types of electrical resistance
Answers
Answer:
Electrical Resistance is a measure of the opposition to current flow in an electrical circuit
Types: variable resistance and set resistance
Explanation:
PLEASE HELP ME
which of the following outdoor sports is not areobic
A. Swimming
B. Orienteering
C. Kayaking
D. Water Skiing
Answers
Answer: D.
Explanation:
a p e x confirmed its correct
Water Skiing is the only sport in the option above which is not an areobic outdoor sport. (Option D)
Aerobic SportsAerobic exercise also known as cardio or cardio-respiratory exercise is physical exercise of low to high intensity that depends primarily on the aerobic energy-generating process. Examples of aerobic sports are swimming, climbing, running, kayaking etc.
Therefore, the outdoor sports which is not an areobic sport is water skiing.
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True or False
The ecological niche of a species is the place where its members live.
Answers
Answer:
true
Explanation:
what activities belong at the top of the physical activity pyramid
Answers
Answer: Cut down on watching tv, sitting down for more than 30 minutes at a time, and playing video games.
Explanation:
proof the equation of motion third
Answers
The proof of third equation of motion is determined as v² = 2as + u².
What is the proof of third equation of motion?
The proof of third equation of motion is determined as follows;
The first equation is given as;
v = u + at
t = ( v - u ) /a
where;
u is the initial velocitya is the accelerationt is the time of motionThe formula for the average distance traveled by an object is;
s = (v + u)/2 x t
Expand the equation above as;
s = (v + u)/2 x (v - u)/a
s = (v² - u²) / 2a
2as = v² - u²
v² = 2as + u², proved
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A baseball player’s bat applies an average force of 220. newtons to a tennis ball for 0.03 second. The average force exerted on the racket by the tennis ball is
Answers
Answer:
98
Explanation:
1. What is the role of the battery in an electric circuit? a. Transformer b. Conductor c. Source d. switch
Answers
Answer:
Conductor
Explanation:
A battery holds all of the energy in itself. So without the battery, the circuit cannot work.
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Can an object experiencing constant acceleration change its direction of motion? Explain.
Answers
Answer:
Yes it can.
Explanation:
A object undergoing a constant acceleration has a constantly changing velocity. If the acceleration always points in the same direction as the velocity, the trajectory will be no different than if there were no acceleration, but in general acceleration will change the trajectory.
Why do we charge a capacitor under a DC voltage source only?
Answers
what is the formula for the cop of a heat pump operating in the heating mode?
Answers
The formula for the Coefficient of Performance of a heat pump operating in heating mode is COP = Qh / W.
where Qh is the heat output (in watts or BTUs) and W is the electrical power input (in watts).
The COP is a measure of the efficiency of a heat pump system. It tells us how much heat energy we can get out of the system for each unit of electrical energy we put in. In heating mode, the COP is calculated as the ratio of the heat output (Qh) to the electrical power input (W).
In this formula, COP represents the Coefficient of Performance, Q_h represents the heat output (i.e., the amount of heat transferred to the space being heated), and W represents the work input (i.e., the energy required to operate the heat pump).In the heating mode, a heat pump transfers heat from a colder source to a warmer space. The higher the COP, the more efficient the heat pump is at providing heat.
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19. a jetliner can fly 6.00 hours on a full load of fuel. without any wind, it flies at a speed of 2.40 x 102 m/s. the plane is to make a roundtrip by heading due west for a certain distance, turning around, and then heading due east for the return trip. during the entire flight, however, the plane encounters a 57.8 m/s wind from the jet stream, which blows from west to east. what is the maximum distance that the plane can travel due west (flying at a constant 240 m/s relative to the air) and just be able to return home?
Answers
The maximum distance that the plane can travel towards west and just be able to return home is 1.33 × 103 km.
Given data of the problem:
Time of full load of fuel = 6.00 hours
Speed of jetliner without wind = 2.40 × 102 m/s
Wind speed = 57.8 m/s
Let d be the distance of the jetliner fly towards west.
So, the distance travelled towards east = d.
Total time = time for flying towards west + time for flying towards east= (d/(2.40 × 102 − 57.8)) + (d/(2.40 × 102 + 57.8))Now, we need to find the maximum distance that the plane can travel towards west (flying at a constant 240 m/s relative to the air) and just be able to return home.
When the plane reaches at a maximum distance it has to return with the remaining fuel. Therefore, the total time for the round trip is equal to the time of fuel load i.e., 6 hours.So, we have:(d/(2.40 × 102 − 57.8)) + (d/(2.40 × 102 + 57.8)) = 6By simplifying, we get:d = 1.33 × 103 km.
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calculate the frequency of a wave using an equation
Answers
Answer:
1. f=1T. where: f is the frequency of the wave in hertz. T is the period of the wave in seconds.
2. f=vλ where: f is the frequency of the wave in hertz. v is the velocity of the wave in meters per second. λ is the wavelength of the wave in meters
3. f=cλ
Explanation:
a piston–cylinder device, whose piston is resting on a set of stops, initially contains 6 kg of air at 200 kpa and 27°c. the mass of the piston is such that a pressure of 400kpa is required to move it. heat is now transferred to the air until its volume doubles. the gas constant of air is r
Answers
By using internal energy, the heat transferred to the air until its volume doubles is 5570.69 joule.
We need to know about internal energy to solve this problem. For a closed system, with matter transfer excluded, the changes in internal energy are due to heat transfer and due to thermodynamic work done by the system on its surroundings. It can be determined as
ΔU = Q - W
where ΔU is the change in internal energy, Q is heat transferred and W is work done.
From the question above, we know that
m = 6 kg
P1 = 200 kPa
T1 = 298 K
P2 = 400 KPa
The internal energy should be
ΔU = Q - W
m(U2 - U1) = Q2 - W2
at the second state the work is zero
m(U2 - U1) = Q2
Assume constant specific heats
Q2 = m . Cv (T2 - T1)
Using the ideal gas
P1/T1 = P2/T2
200/298 = 400/T2
T2 = 596 K
Q2 = m . C . (T2-T1)
Q2 = 6 . 3.1156 . (596-298)
Q2 = 5570.69 joule
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if the rank of a is r, then occurs as an eigenvalue of a with multiplicity r.
Answers
If λ occurs as an eigenvalue of A with multiplicity r, then there are r linearly independent eigenvectors associated with λ, and the geometric multiplicity of λ is equal to r.
Let A be an n × n matrix. An eigenvalue of A is a scalar λ such that there is a nonzero vector x satisfying the equation Ax = λx. This equation can be rewritten as the linear system (A − λI)x = 0, where I is the identity matrix. Nontrivial solutions to this equation exist if and only if the matrix A − λI is singular, which means that its determinant is zero. Thus, the eigenvalues of A are the roots of the polynomial equation det(A − λI) = 0, which is called the characteristic equation of A. The algebraic multiplicity of an eigenvalue is the number of times it appears as a root of the characteristic equation. The geometric multiplicity of an eigenvalue is the dimension of the eigenspace associated with that eigenvalue. The eigenspace of an eigenvalue λ is the set of all eigenvectors of A associated with λ, along with the zero vector.
The rank of A is the dimension of its column space, which is the span of its column vectors. The rank of A is equal to the dimension of the row space of A, which is the span of its row vectors. The rank of A is also equal to the number of nonzero singular values of A. If the rank of A is r, then the dimension of the nullspace of A is n − r. If A has r linearly independent eigenvectors associated with a particular eigenvalue λ, then the geometric multiplicity of λ is r. If the algebraic multiplicity of λ is greater than its geometric multiplicity, then there are not enough eigenvectors to form a basis of the eigenspace associated with λ, which means that A is not diagonalizable. If the algebraic multiplicity of λ is equal to its geometric multiplicity, then A is diagonalizable. If λ occurs as an eigenvalue of A with multiplicity r, then there are r linearly independent eigenvectors associated with λ, and the geometric multiplicity of λ is equal to r.
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Noelle pulls on a heavy door, but cannot get it to open. Which of the following statements are true?Noelle has done work.Noelle has not done work.The door has very little inertia.This is an example of the work principle.
Answers
The correct statements are:
1.Noelle has done work.
2.The door has very little inertia.
Explanation:
1.Noelle has done work: Work is defined as the application of force over a displacement. In this scenario, Noelle is applying a force to the door, even though she cannot get it to open. Despite not achieving the desired outcome of opening the door, Noelle is still exerting force and thus doing work.
2.The door has very little inertia: Inertia is the resistance of an object to changes in its state of motion. If the door has very little inertia, it means that it is easier to move or change its motion. This statement implies that the door is not responding to Noelle's force, suggesting that it may be stuck, too heavy, or have some other obstacle preventing it from opening.
3.The statement “Noelle has not done work” and "This is an example of the work principle" is not true because the work principle refers to the concept of work being done when a force is applied and an object is displaced. In this scenario, although Noelle is applying a force, the door is not displaced, so work is not being done on the door.
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Approximately how long does it take the uterus lining to build up again after menstruation
Answers
The uterus lining is rebuilt by the end of the menstrual period. The rebuilding of the uterus lining starts after menstruation and the lining is typically completely rebuilt by day 14 of the menstrual cycle, which is when ovulation occurs and the uterus is preparing to potentially receive a fertilized egg.
The endometrium is the inner lining of the uterus, and it thickens every month to prepare for pregnancy. After menstruation, the endometrium grows and thickens to prepare for the implantation of a fertilized egg. The cells in the lining multiply and enlarge, and the glands in the lining begin to secrete mucus and other substances that help support the fertilized egg and promote its growth.
The rebuilding of the endometrium usually takes about two weeks after menstruation. This process is closely regulated by hormones such as estrogen and progesterone, which are produced by the ovaries and other parts of the body. These hormones help control the growth and development of the endometrium and other reproductive tissues.
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g a car starts from a state of rest and drives along a level, straight road. for the first 30 s, the car speeds up with a constant acceleration of 2.50 m/s2, after which it continues at the constant velocity that it has acquired for the next 5.00 minutes, at which time the brakes are applied, and there is an acceleration of -2.2 m/s2 until the car stops. what is the total displacement of the car from its starting point, and the total time of travel?
Answers
The total displacement of the car is 36.31 km
The total time of travel is 6 minutes and 4.09 seconds
What is acceleration?Acceleration is a vector quantity considered as the rate at which an object's velocity varies. If an object's velocity changes, it is accelerating.
For the first 30 seconds, the car has a constant acceleration of 2.50 m/s², so we can find the final velocity:
v = u + at
v = 0 + 2.50 m/s² x 30 s
v = 75 m/s
The displacement during the first 30 seconds:
s1 = ut + 0.5at²
s1 = 0 + 0.5 x 2.50 m/s^2 x (30 s)²
s1 = 1125 m
For the next 5 minutes (300 seconds), the car moves with a constant velocity of 75 m/s, so the displacement can be calculated using:
s2 = vt
s2 = 75 m/s x 300 s
s2 = 22500 m
Finally, the car comes to a stop with an acceleration of -2.2 m/s².
The time it takes to stop:
v² = u² + 2as
0 = (75 m/s)² + 2(-2.2 m/s²)s
s = 12784.09 m
t = (v-u)/a = (-75 m/s)/(-2.2 m/s²) = 34.09 s
Therefore, the total displacement of the car is:
= s1 + s2 + s3
= 1125 m + 22500 m + 12784.09 m
= 36309.09 m or 36.31 km (to two decimal places)
The total time of travel is:
= t1 + t2 + t3
= 30 s + 300 s + 34.09 s
= 364.09 s or 6 minutes and 4.09 seconds (to two decimal places)
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If the action force is the swimmer pushing water in the leftward direction, what is the reaction force?
PLEASE ANSWER
CORRECTLY PLS
Answers
Answer:
The reaction force is the water pushing the swimmer in the rightward direction.
Hope you could get an idea from here.
Doubt clarification - use comment section.
4. A 1.5 m tall man is standing 2m away from the concave lens (remember f is negative) of a peephole with a focal length of 3.0 cm. a) What is the distance to the image in centimeters? b) What is the magnification of the image in meters?
Answers
Here,
Size of object = 1.5 m;
Object distance (u) = - 2m = -200cm
focal length (f) = - 3.0 cm
Image distance (v) = ?
Using lens formula
\(\begin{gathered} \frac{1}{f}=\text{ }\frac{1}{v}-\frac{1}{u}; \\ \frac{1}{-3}=\frac{1}{v}-\frac{1}{-200}; \\ \frac{1}{-3}=\text{ }\frac{1}{v}\text{ +}\frac{1}{200} \\ \frac{1}{v}=\text{ -}\frac{1}{3}-\frac{1}{200}=-\text{ }\frac{203}{600} \\ v=\text{ - }\frac{600}{203}=\text{ -2.96 cm} \end{gathered}\)Now magnification is given by
\(Magnification=\text{ }\frac{v}{u}=\text{ }\frac{2.96}{200}=0.0148\)Final answer is :-
Image distance = - 2.96 cm & magnification = 0.0148
A 3.0-Cm-High Object Is Located 20 Cm From A Concave Mirror. The Mirror's Radius Of Curvature Is 80 Cm a. Determine height of the image and describe image characteristics (6+4 pts) b. Sketch ray diagram
Answers
The height of the image formed by the concave mirror is approximately 3.075 cm.
1/f = 1/v - 1/u
First, we need to calculate the focal length (f) of the mirror using the formula:
f = R/2
f = -80 cm / 2 = -40 cm
Now we can substitute the values into the mirror equation:
1/-40 = 1/v - 1/-20
Simplifying the equation:
-1/40 = 1/v + 1/20
Multiply both sides by 40v:
-1 = 40 + 2v
Rearranging the equation:
2v = -41
v = -41/2 = -20.5 cm
The negative sign indicates that the image is formed on the same side as the object (i.e., it is a real image).
Now we can determine the height of the image (h') using the magnification formula:
h'/h = -v/u
Substituting the values:
h'/3 = -(-20.5)/(-20)
Simplifying the equation:
h'/3 = 1.025
h' = 3 * 1.025 = 3.075 cm
A concave mirror, also known as a converging mirror, is a curved mirror with a reflective surface that curves inward. It is characterized by its bulging shape, where the center is thicker than the edges. The curvature of the mirror causes light rays that strike it to converge or come together at a focal point in front of the mirror.
Concave mirrors have unique optical properties, making them useful in various applications. The focal point is located along the principal axis, which is an imaginary line passing through the center of curvature and the mirror's center. The distance between the mirror's surface and the focal point is called the focal length. Concave mirrors are commonly used in optical devices such as telescopes, microscopes, and reflector-type optical systems.
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a string with fixed ends is made to go into standing wave patterns. at a given tension, the lowest frequency for which a certain pattern exists is 150 Hz. which of the following frequencies would also cause a standing wave pattern in this case?
Answers
Answer:
700 hz
Explanation:
Tarzan wing on a 30. 0m long vine initially inclined at an angle of 37. 0 degree with the vertical. What i hi peed at the bottom of the wing if he doe the following? A) Start from ret. B) Start with an initial peed of 4. 00m/
Answers
A.) The speed of Tarzan at the bottom of the swing when he starts from rest is 10.8 m/s.
B.) The speed of Tarzan at the bottom of the swing when he starts with 4 m/s is 11.6 m/s.
Let us solve this problem using law of conservation of energy. The kinetic energy at the bottom of the swing will be equal to the gravitational potential energy at the start of the motion.
U = K
m g h = 1/2 m v²
where,
m is Tarzan's mass
g is acceleration due to gravity
h is initial height
Tarzan's speed at the bottom is v
Re-arranging the equation for making v as subject, we have
v = √ (2 g h + u²)
Initial velocity u = 0.
Therefore, we must determine h, Tarzan's starting height. We know that the length of the swing is L= 30 m and it is initially inclined at θ = 37° with respect to the vertical, so the initial height of Tarzan is given by
h = L - L cosθ = L(1 - cosθ) = 30 ×(1 - cos 37 ) = 6 m
Tarzan's speed, then, at the swing's bottom is
v = √ ( 2 × 9.8 × 6) = 10.8 m/s
B.) If u = 4 m/s,
v = √ 2 g h + u² = √ [2 g L(1 - cosθ) + u²] = √ [ 2 × 9.81× 30 × (1 - cos 37 ) + 4²] = 11.6 m/s
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2
Which statement about the relationship between an organism's traits and its genes is true?
A.
An organism's genes are a direct result of its inherited traits.
B. Traits code for the proteins that determine an organism's genes.
C.
Genes code for proteins that determine an organism's traits.
D. Genes code for the DNA that determines an organism's traits.
Answers
TO be completely Honest with this, Based of reading the questions and answers it may be D. just off sheer legibility of logic alone, Hope this is not wrong.
The Doppler effect a. can be applied only to sound waves. b. is the basic explanation for the blue shift of light in our Universe. c. occurs when the frequency of sound waves received is lower if the wave source is moving toward you than if it's moving away. d. occurs when the pitch of a sound gets lower if the source is receding.
Answers
Answer:
a. can be applied only to sound waves.
c. occurs when the frequency of sound waves received is lower if the wave source is moving toward you than if it's moving away
d. occurs when the pitch of a sound gets lower if the source is receding.
Explanation:
\(.\)
What does the number of valence electrons an atom has have to do with whether the atom
will gain electrons or lose electrons?
Answers
Answer:
A valence number of 1 means that an alement will generally react to lose one electron to obtain a full outer shell.
Group two elements are assigned a valence number of 2. A valence number 2 means that a group two elements will generally react to lose two electrons to obtain a full outer shell.
Explanation:
Hope it helps
according to our lab, what is the surface temperature of betelguese? group of answer choices a, 3,500 k b. 3,000 k c. 3,530 k
Answers
The surface temperature of Betelgeuse is 3,500 K.
Betelgeuse is a red supergiant and one of the brightest stars in the night sky. It is a relatively young star, estimated to be about 10 million years old and is located about 640 light years away from Earth. It is one of the largest stars known and is about 1,000 times larger in radius than our Sun.
Its outer atmosphere has a temperature of about 3,500 K, which is much hotter than the Sun's surface temperature of 5,778 K. The high temperature of the outer atmosphere is due to the fact that Betelgeuse is a red supergiant. In comparison to other stars, red supergiants are among the hottest due to their large surface areas. Betelgeuse is an important star in astronomical studies because of its size and brightness.
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Which unit will the operation 5s+2s have?
A) s
B) s^2
C)No unit
D) Not valid
Answers
Answer:
I think its c) no unit
Explanation:
jus took test and got a 100
A hydraulic jack has an input piston of
area 0.00139 m2, and an output
piston of area 0.0882 m2. If 12.8 N of
force is applied to the input piston,
how much force does that create on
the output piston?
Answers
The force that was created on the output is 812.2 N.
What is force?Force is the product of mass and acceleration.
To calculate the force that was created on the output, we use the formula below
Formula:
F/A = f/a............................. Equation 1Where:
F = Input forceA = Input areaf = Output forcea = Output areaFrom the question,
Given:
F = 12.8 NA = 0.00139 m²a = 0.0882 m²Substitute these values into equation 1 and solve for f
12.8/0.00139 = f/0.0882f = (12.8×0.0882)/0.00139f = 812.2 NHence, the output force is 812.2 N.
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lithification is a process of:
a. melting igneous rock
b. eliminating spaces between grains
c. forming sedimentary rock
d. causing uplift
Answers
Lithification is a process of forming sedimentary rock. The correct option is D.
What do you mean by lithification?The challenging process of lithification converts loose silt grains that have recently been deposited into rock. Once a silt is deposited, lithification may occur immediately or later. Cementation is one of the crucial processes, particularly for sandstones and conglomerates.
What makes lithification significant?Fresh sediment is often a loose substance that has several pores or open holes that are either filled with air or water. Lithification works to fill in the reduced pore space with a mineral deposits substance. Compaction and cementation are the major lithification processes.
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If the current in a a wire is 2. 0 amperes and the voltage across the wire is 10 volts, what is the resistance of the wire?.
Answers
the resistance of the wire to the nearest tenth of an ohm is 2Ω.
What is resistance?
resistance is a measure of the opposition to current flow in an electrical circuit. resistance always measure in ohm.It design with R.A resistor is a device designed to produce resistance. resistor can be used to the limit current, divide voltage, or generate heat.
Sol-Potential difference (V) = current (I) * Resistance (R)
V = IR
I = 2.0A
V = 10v
So the
R = ?
V = IR
R = V / I
R = 10 / 2
R = 2Ω
Thus the,
The resistance across the wire is 2Ω.
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