The highway patrol car catches you after 125 sec
We know that,
s = ut + 1/2 at²
v = s / t
where,
s = Distance
u = Initial velocity
t = Time
a = Acceleration
Given that,
The patrol car has with a constant acceleration of 0.8 m / s²
Initial velocity of car = 0
Velocity of your vehicle = 50 m / s
After the traffic signal distance travelled by your vehicle and patrol car is equal and time taken is also equal.
For your vehicle,
s = v * t
For the patrol car,
s = ut + 1/2 at²
vt = ut + 1/2 at²
50 t = 0 + 1 / 2 * 0.8 * t²
t = 125 sec
Velocity is the distance travelled by an object with respect to time. Its unit is m / s
Therefore, the highway patrol car will catchup to you after 125 sec
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5) Explain cell phone charging transformation:
Answer:
Charging a phone is the exact opposite of discharging a battery's energy. By supplying current (the manipulated variable), a charger transfers lithium ions from the positive electrode to the negative electrode, thus restoring energy
Explanation:
a man accidentally kicks a pebble off a cliff that is 18 m high with a horizontal velocity of 2.3 m/s. How long does it take to hit the ground below?
A pebble off a cliff to hit the ground below t = 0.128 sec.
Equation :Given,
distance = 18m
velocity = 2.3m /s
time = ?
To find the time in given data,
Use formula,
velocity = distance / time
Putting the value in formula,
We get,
2.3 m/s = 18 m / t
t = 2.3 m/s / 18 m
t = 0.128 sec
Velocity :The vector quantity velocity (v), denoted by the equation v = s/t, measures displacement (or change in position, s), over change in time (t). Speed (or rate, r) is a scalar quantity, denoted by the equation r = d/t, that measures the distance traveled (d) over the change in time (t).
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Which object will accelerate less if the
same force is applied to both--an
apple or a couch? Why
If we apply same force to both-an apple or a couch, the object which will accelerate less is couch.
What is acceleration?
Acceleration is the term used to describe the pace at which speed and direction of velocity vary over time. Something is said to be accelerating when it starts to move faster or slower. Even when the speed is constant, motion on a circle accelerates because the direction is always keeps shifting. Both impacts cause all other motions to speed up.
The couch will accelerate less because
F = m a
where, F = force, m = mass, a = acceleration.
This equation can also be written as
a = F/m
It tells us that the acceleration is inversely proportional to mass.
so, in the question given the mass of couch will greater as compared to an apple so the acceleration of the couch will be lesser as compared to apple.
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URGENT!! ILL GIVE BRAINLIEST! AND 100 POINTS
The diagram below shows a portion of the electromagnetic spectrum. Which of the following statements correctly explains the relationship between FM and AM radio waves?
Answer: The difference is in how the carrier wave is modulated, or altered
Explanation:
With AM radio, the amplitude, or overall strength, of the signal is varied to incorporate the sound information. With FM, the frequency (the number of times each second that the current changes direction) of the carrier signal is varied
couldnt read that so gave my input hope it helps or is closly related to one of the answers
Answer: C. FM radio waves carry more energy than AM radio waves. This is supported by the fact that FM radio waves have a shorter wavelength compared to AM radio waves.
Explanation:
C6H12O6 + 6O2 6CO2+6H2O + energy Which statement correctly compares the reactants and products of the equation?
The true statement about the equation of respiration is:
The mass of the reactants is the same as the mass of the products; option C.
What is respiration?Respiration is the process by which living organisms break down large molecules such as glucose into smaller molecules such a carbon dioxide and water to release energy in the form of ATP.
Respiration are of two types in living organisms:
Aerobic respiration which requires oxygenanaerobic respiration that does not require oxygenThe equation of aerobic respiration is given below:
C₆H₁₂O₆ + 6 O₂ → 6 CO₂ + 6 H₂O + energyIn the given equation above, glucose reacts i the presence of oxygen is broken down into carbon dioxide and water and energy is released.
According to the law of conservation of mass, the mass of reactants is equal to the mass of the products.
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Note that the complete question is given below:
Respiration describes the process that living cells use to release energy by combining sugar and oxygen. The primary chemical changes that happen during respiration are shown in the equation below.
C₆H₁₂O₆ + 6 O₂ → 6 CO₂ + 6 H₂O + energy
Which statement correctly compares the reactants and products of the equation?
Which statement correctly compares the reactants and products of the equation?
A.
The mass of the reactants is less than the mass of the products.
B.
The mass of the reactants is greater than the mass of the products.
C.
The mass of the reactants is the same as the mass of the products.
D.
The number of reactant molecules is greater than the number of products.
Can an object with constant acceleration reverse its direction of travel? can it reverse its direction twice? in both cases, explain your reasoning
Answer:
It is not possible to change direction twice, given constant acceleration. To convince yourself, imagine any general v−t graph - it would be straight line in case of constant acceleration. Change in direction corresponds to v going from positive to negative or vice versa.Explanation:
Answer:It is not possible to change direction twice, given constant acceleration.
Explanation:To convince yourself, imagine any general v−t graph - it would be straight line in case of constant acceleration. Change in direction corresponds to v going from positive to negative or vice versa.
A ball is thrown horizontally from the top of a
building 110 m high. The ball strikes the ground
74 m horizontally from the point of release. What
is the speed of the ball just before it strikes the
ground?
Answer in units of m/s.
The speed of the ball just before it strikes the ground is 46.4 m/s
Motion Under Gravity
Motion under gravity is also known as vertical motion. The gravity act only on the vertical component of the velocity.
Given that a ball is thrown horizontally from the top of a building 110 m high. The ball strikes the ground 74 m horizontally from the point of release.
The time taken for the ball will be
h = ut + 1/2gt²
but u = 0
110 = 1/2 × 9.8 × t²
110 = 4.9t²
t² = 110 / 4.9
t² = 22.45
t = √22.45
t = 4.74 s
The speed of the ball just before it strikes the ground will be
v² = u² + 2gH
v² = 0 + 2 × 9.8 × 110
v² = 2156
v = √2156
v = 46.4 m/s
Therefore, the speed of the ball just before it strikes the ground is 46.4 m/s
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True or false. An airplane can fly in space. True False
Answer:
the answer to this question is false because a airplane wouldve survive in space
find the energy u of the capacitor in terms of c and v by using the definition of capacitance and the formula for the energy in a capacitor. express your answer in terms of c and v .
Let's take into account the volt-volt potential difference between the plates and a capacitance capacitor.
C farad, we can raise the fee
q1 to q1+dq1
between the positive and negative plates.
the instantaneous potential difference will be
V1 = q1C
The finished work will be d
W = V1dq1
The capacitor's total charging effort from the uncharged state to the finished state q will now be
W =∫q0q1Cdq1
=1C[q122]
q0=1C[q22−0]
=12q2C
We are aware that the entire quantity of work done is defined by potential energy.
The potential energy will be
U=W=12q2C
As a result, the capacitor's energy is
U=12q2C.
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During car safety crash tests, dummies that don't wear seatbelts fly through the windshield and out of the car. why does this happen? in your answer, be sure to state which of newton's law of motion this pertains to, describe this law, and explain how it causes the dummies to move forward.
The First Law of Motion of Newton states that an item at rest or in motion will tend to stay at rest or in motion until acted upon by an external force. This means that anybody not wearing a seatbelt will continue to move forward in the initial direction of motion.
What is Newton's First Law of Motion?According to Newton's first law, unless an outside force causes it to change, every item will stay at rest or in uniform motion along a straight path.The link between an object's motion and the forces acting on it is outlined by Newton's laws of motion, which are three fundamental principles of classical mechanics. The following can be used to paraphrase these laws:Unless a force acts on a body, it stays at rest or moves in a straight path at a constant speed.The force acting on a body is equal to the time rate at which its momentum changes.When two bodies interact, forces are generated that are equal in magnitude but directed in different directions.To know more about Newton's First Law of Motion,refer to the following link:
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011 10.0 points
The acceleration due to gravity on planet X is one fifth that on the surface of the earth.
If it takes 4.6 s for an object to fall a certain distance from rest on earth, how long would it take to fall the same distance on planet X?
Answer in units of s.
If it takes 4.6 seconds for an object to fall a certain distance from rest on earth, then it would take 10.29 seconds to fall the same distance on planet X.
What are the three equations of motion?There are three equations of motion given by Newton,
v = u + at
S = ut + 1/2×a×t²
v² - u² = 2×a×s
Keep in mind that these calculations only apply to uniform acceleration.
As given in the problem, The acceleration due to gravity on planet X is one-fifth that on the surface of the earth. If it takes 4.6 s for an object to fall a certain distance from rest on earth, then we have to find how long would it take to fall the same distance on planet X,
By using the second equation of motion given by newton,
Let us suppose the acceleration due to gravity on the earth is 10 m / s²
S = ut + 1/2at²
= 0 + 0.5×10×4.6²
= 105.8 meters
The acceleration due to gravity on planet X = 2 meters / second
S = ut + 1/2at²
105.8 = 0 + 0.5×2×t²
t² = 105.8
t = 10.29 seconds
Thus, it would take 10.29 seconds to fall the same distance on planet X
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Which of the following is a compound?
(1)hydrogen
(2)oxygen
(3)carbon
(4)carbon dioxide
Answer:
4 LE DIOXYDE DE CARBONE
Explanation:
PLEASE HELP ASAP!!! A hiker walks 12cm North in 2 hours what is his velocity?
Answer:
[tex]\boldsymbol {\boxed{v = 12 \ \dfrac{\text{ km}}{\text{hr}} }}[/tex]
Explanation:
Data:
t = 2 hr
S = 12 km
Find:
[tex]v \ - \ ?[/tex]
-----------------------------------
Solution:
[tex]\boldsymbol {\boxed{v = \dfrac{S}{t} }}[/tex]
Calculations:
[tex]\boldsymbol v =[/tex] 12 km / 2 hr = 6 km/hr.
Answer: [tex]v =[/tex] 6 km/hr.
10. A girl cycles for 30s at a speed of 4 m/s. Calculate the distance she travels.
Answer:
120 m
Explanation:
4 m/s * 30 s = 120 m
Two kg of refrigerant 134a undergoes a polytropic process in a piston–cylinder assembly from an initial state of saturated vapor at 2 bar to a final state of 12 bar, 80°c. Determine the work for the process, in kj.
The work done by polytropic process is -69.88 kJ.
The work for the polytropic process is determined using
P . v^n = constant.
where P is pressure, V is specific volume
As we know that
W = m∫Pdv
W = m(P2v2 - P1v1) / (1 - n)
In order to evaluate this expression, we need to determine the specific volumes and the polytropic exponent, n.
State 1: v1 = vg1 = 0.0993 m3/kg
State 2: at 12 bar, 80oC; v2 = 0.02051 m3/kg
Hence by using polytropic exponent
P1 / P2 = (v2 / v1)^n
n = ln(2/12) / ln(0.02051/0.0993)
n = 1.136
Find the work done
W = m(P2v2 - P1v1) / (1 - n)
W = 2kg(12bar . 0.02051m³/kg - 2 . 0.0993) / (1 - 1.136) x (10⁵ N/m²/1 bar) x (1 kJ / 10³ Nm)
W = -69.88 kJ
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If two robots are racing on a 100 meter length straight line track. One is traveling two times as quickly as the other robot. What could be changed other than speed that would allow the slower of the two robots win the race ?
Change in the starting time of the robots for the race will allow the slower robot to win the race.
Robots are any autonomously run machines that eliminate the need for human labour, even if they may not look like humans or carry out tasks in a way that is humanlike. Robotics, then, is the branch of engineering that deals with the creation, maintenance, and use of robots.
Although the idea of synthetic people predates written history, the term "robot" is derived from the Czech word "robota," which means "forced labour" or "serf," and was used in Karel apek's play R.U.R. (1920).
Runaround, a work of science fiction by Isaac Asimov, introduced the word robotics (1942). It established a new level of plausibility regarding the possible difficulty of creating sentient robots and the potential technological and societal issues that might arise, along with Asimov's other robot stories.
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One way to control avalanches is to send explosive charges to key areas on mountain slopes to trigger small avalanches before larger ones can build up. Norway, for instance, uses solar- powered launchers that fire pre-timed charges. Your launcher fires charges at an angle of 70 degrees from the horizontal and a speed of 200 m/s. If you fire a charge and it travels a horizontal distance of 300 m away from you, how high up the slope will it strike?.
By using uniform motion, the high up the slope will it strike is 730.62 m.
We need to know about uniform motion to solve this problem. The uniform motion is an object's motion under acceleration. It should follow the rule
vt = vo + a . t
vt² = vo² + 2a . s
s = vo . t + 1/2 . a . t²
where vt is final velocity, vo is initial velocity, a is acceleration, t is time and s is displacement.
From the question above, we know that
θ = 70⁰
vi = 200 m/s
x = 300 m
Find the initial velocity in x and y axis
vx = vi cosθ = 68.40 m/s
vy = vi sinθ = 187.94 m/s
Find the time taken to reach 300 m
vx = x / t
68.4 = 300 / t
t = 4.39 second
Find the time taken to reach maximum height
vt = vo + a . t
0 = vy - g . t
vy = gt
187.94 = 9.8 . t
t = 19.18 second
The motion of projectile is raising to maximum height, hence
s = vo . t + 1/2 . a . t²
h = vy . t - 1/2 . g . t²
h = 187.94 . 4.39 - 1/2 . 9.8 . 4.39²
h = 730.62 m
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A 0.7500 cm diameter plastic sphere, used in a static electricity demonstra-tion, has a uniformly distributed 60.0 pc charge on its surface. what is the potentialnear its surface?
For a 0.7500 cm diameter plastic sphere, used in a static electricity demonstration, the potential near its surface is 144V.
CalculationV= kq/r = 9 x [tex]10^{9}[/tex] [tex]\frac{6*10^{-11}}{0.00375}[/tex]
=144 V
What is potential?The magnitude of the potential point per unit charge is the electric potential at a specific point. However, the following definition is far more accurate: The amount of work required to move a unit positive charge from infinity to a certain place is known as the electric potential at that location.
Potential is characterized as a thing’s potential to materialize. The greatest grades to which a specific student is capable are an illustration of potential.
What does voltage’s potential mean?The external effort required to move a charge in an electric field from one position to another is known as an electric potential difference, or voltage.
The difference in potential energy experienced by an object is known as its electric potential.
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9. Which of these motions would be an example of 1D motion?
A ball being kicked off a hill
b. A football being kicked through the goal post
A ball being thrown up into the air
d. None of the above
Suppose that a classroom has 10 light bulbs. The probability that each individual light bulb works is 0. 6. Suppose that each light bulb works independently of the other light bulbs. What is the probability that all 10 of the light bulbs work?.
The probability is 0.006
The probability of a light bulb that works is 0.6 and that a bulb would not work is 0.4 (0.6+0.4 = 1.0)The key to this question is the state that says each bulb's working condition is independent of others.That means you could treat the probability of a bulb individually towards the final/asked probability.You may recall your memory of the fact, the probability of 2 individual events happening at the same time is given by [tex]P(A\cap B) = P(A)\times P(B)[/tex], and this is applied to 10 events here in this question.You only need to focus on the happening that each bulb works and if that happens, only the probability of a bulb that works is to be considered.Therefore, the probability of all bulbs working would be calculated as follows,
[tex]\begin{aligned}\\\\P &= 0.6\times0.6\times0.6\times0.6\times0.6\times 0.6\times0.6\times0.6\times0.6\times0.6\\\\&= 0.0060466\\\\&\approx0.006\end{aligned}[/tex]
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a car sitting at a red light begins to accelerate at 2.0 m/s 2 m/s2 when the light turns green. it continues with this acceleration until it reaches a speed of 20 m/sm/s . it then travels at this speed for another few minutes. how far does the car travel in the first 34 ss after the light changes to green?
The car travels a distance of 820m in the first 34s after the light changes to green.
Acceleration, a = 2ms⁻²
Initial velocity, u = 0 ms⁻¹ (Since the car start from rest)
Final velocity, v = 20 ms⁻¹
From first equation of motion,
v - u = at
20 - 0 = 2 × t
20 = 2t
t = 10s
From second equation of motion,
S = ut + ¹/₂ at²
Distance travelled during 10s:
S₁ = 0 × 10 + ¹/₂ × (10)²
S₁ = 100m
Distance travelled for the remaining 36s:
S₂ = v × t
S₂ = 20 × 36
S₂ = 720m
Total distance travelled:
S = S₁ + S₂
S = 100 + 720
S = 820m
Therefore, the car travels a distance of 820m in the first 34s after the light changes to green.
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Cassie walked to her friend's house with an average speed of 1.40 m/s. The distance between
the houses is 205 m. How long did the trip take her?
Answer:
146.4 s
Explanation:
Distance / rate = time
205 m / 1.4 m/s = 146.4 s
True or False?
To every action force there is an equal and opposite reaction force is the law of conservation of momentum.
How long does it take moonlight to reach earth given that the distance to the moon is 384,000 km?
the circuit directory gives the " " in a wording that would be clear for "nonelectrical" people to decipher and identify the circuit number for luminaires, receptacles, appliances, or equipment.
The circuit directory shows the load/area in a vocabulary that would be clear for "nonelectrical" people to decipher and determine the circuit number for luminaires, receptacles, appliances, or tools.
What is load divided by area?True stress is the spread load divided by the actual cross-sectional scope of material. Engineering strain is the applied load separated by the original cross-sectional area of material. Also known as nominal stress.
What is area in stress formula?As expected by the units, stress is assigned by dividing the force by the location of its generation, and since this area (“A”) is either sectional or axial, the basic stress formula is “σ = F/A”.
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this is a multi-part question. once an answer is submitted, you will be unable to return to this part. a piece of plywood in which several holes are being drilled successively has been secured to workbench by means of two nails. knowing that the drill exerts a 29-n·m couple on the piece of plywood, determine the magnitude of the resulting forces applied to the nails for the given locations.
The magnitude of the resulting forces applied to the nails if they are located at A and B is 64.44 N, at B and C is 120.83 N and at A and C is 56.86 N.
We know that,
C = F d
where,
C = Couple
F = Magnitude of resulting forces
d = Distance between two points
Given that,
C = 29 N m
[tex]d_{AB}[/tex] = 450 mm = 0.45 m
[tex]d_{BC}[/tex] = 240 mm = 0.24 m
F = C / d
The magnitude of the resulting forces applied to the nails if they are located at A and B is
F = 29 / [tex]d_{AB}[/tex] = 29 / 0.45
F = 64.44 N
The magnitude of the resulting forces applied to the nails if they are located at B and C is
F = 29 / [tex]d_{BC}[/tex] = 29 / 0.24
F = 120.83 N
The magnitude of the resulting forces applied to the nails if they are located at A and C is
F = 29 / [tex]d_{AC}[/tex]
[tex]d_{BC}[/tex] = √ ( [tex]d_{AB}[/tex] )² + ( [tex]d_{BC}[/tex] )²
[tex]d_{BC}[/tex] = √ ( 0.45² + 0.24² )
[tex]d_{BC}[/tex] = 0.51 m
F = 29 / 0.51
F = 56.86 N
A Couple is two parallel forces of equal magnitude acting in opposite direction.
Therefore, the magnitude of the resulting forces applied to the nails if they are located at
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Which is a type of fundamental force?
friction
spring force
normal force
weak interaction
According to the research, the correct option is weak interaction. A type of fundamental force is weak interaction.
What are fundamental forces?They are those that cannot be explained based on other more basic ones, where the particles interact by virtue of some characteristic that they possess and according to physics, four fundamental forces are recognized at the quantum level:
GravitationalElectromagneticStrong nuclear forceWeak interactionIn this sense, weak interaction is manifested in the transmission of particles where neutrinos and antineutrinos are emitted, without electrical charge and whose mass is very small or even zero, as in the case of the photon.
Therefore, we can conclude that according to the research, the correct option is weak interaction. A type of fundamental force is weak interaction.
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Two tiny spheres of mass 5. 30 mg carry charges of equal magnitude, 62. 0 nc , but opposite sign. They are tied to the same ceiling hook by light strings of length 0. 530 m. When a horizontal uniform electric field e that is directed to the left is turned on, the spheres hang at rest with the angle θ between the strings equal to 58. 0∘
Answer:in this situation we have during the two tiny spheres of masks, 5.8 mg carry Charges of equal magnitude 30 77 Nano column but opposite in sign They are tied to the same ceiling hook by light in spring of 2.53 m. It is known that when they original uniform electric village applied that is directed to the left. The angle between the springs is 58°. Then we have to find the value of E. So given that the mass M is 5.8 mg, that is 5.8 into 10 to the power -3 g. And This is five and we have the charge that is Q. Is 77 and a column. So this is 77 into 10 to the power -9 columns. The length of the string is 0.53 m. And the angle between the spring.
please help i need it fast
Atoms of the pair P and Cl will form covalent bonds in the compound. The correct option is (D)
Covalent bonds are formed between two non-metals. Of the given options the only option that has two non metals is P ( Phosphorous ) and Cl ( Chlorine ). Therefore they will form a covalent bond in a compound.
Chlorine is a halogen. It belongs to group 17 of the periodic table. Phosphorous is a p-block element which belongs to group 15. Group 15 is also called as nitrogen family.
Therefore, the atoms of the pair P and Cl will form covalent bonds in the compound. The correct option is (D)
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A car moved a total distance of 120 km in 90 minutes (1.5 hours). What was
the speed of the car?
OA. 45 km/hr
OB. 30 km/hr
OC. 60 km/hr
OD. 80 km/hr