Answer:
2.24 seconds
Explanation:
xf = xo + vo t + 1/2 at^2
45 = 0 + 15 t + 1/2 (4.5) t^2
2.25 t^2 + 15t - 45 = 0 Quadratic formula shows t = 2.24 seconds
The car takes approximately 2.25 seconds to cover a distance of 45.0 meters under the given conditions of constant acceleration.
Given data:
Initial velocity (u) = 15.0 m/s
Acceleration (a) = 4.50 m/s²
Distance (s) = 45.0 m
We can use the kinematic equation to solve for time (t) when the car covers a certain distance under constant acceleration:
S = ut + 1/2at²
Where:
s = distance
u = initial velocity
a = acceleration
t = time
Plugging in the given values:
45.0 = 15.0t + 1/2 m/s²t²
2.25t² +15t - 45 = 0
t = 2.25sec and -8.92sec
Since time cannot be negative in this context, we discard the negative solution.
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what is the difference between an sa and an sb galaxy? (select all that apply.)
The difference between an sa and sb galaxy is Sa has a larger nucleus and more tightly wound arms than an Sb.
What is sa Galaxy?Sa galaxies are normal spirals that have narrow, tightly wound arms, which usually are visible because of the presence of interstellar dust and, in many cases, bright stars.
What is sb Galaxy?The arms of sb galaxy are more widely spread than those of the Sa variety and appear less smooth.
Thus, the difference between an sa and sb galaxy is Sa has a larger nucleus and more tightly wound arms than an Sb.
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What concurrent motion at the glenohumeral joint should occur with shoulder abduction?
Glenohumeral external rotation is the concurrent motion at the glenohumeral joint which occurs with shoulder abduction.
What is Shoulder abduction?
This refers to the process in which the arm is moved away from the body which also affects the ball and socket joint.
This is referred to as glenohumeral joint in this case which moves in an external rotation manner.
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One exciting fairground ride acts like a giant catapult. The capsule which the ‘rider’ is strapped in is fired high into the sky by rubber straps. Explain the energy changes taking place on the ride.
Answer:
- elastic energy of rubber straps → KE of capsule
- KE → GPE as capsule
Explanation:
Which relationship gives the value of r when r3 is adjusted so that the voltmeter reading is zero?.
Ohm's Law is a formula used to calculate the relationship between voltage, current and resistance in an electrical circuit.
Equation :
To students of electronics, Ohm's Law (E = IR) is as fundamentally important as Einstein's Relativity equation (E = mc²) is to physicists.
E = I x R
When spelled out, it means voltage = current x resistance, or volts = amps x ohms, or V = A x Ω.
NOTE : Because resistance cannot be measured in an active circuit, Ohm's Law is particularly helpful when determining resistance. The aforementioned application of Ohm's Law allows a technician to calculate R without having to turn the circuit off to measure resistance.
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A girl at a state fair swings a ball in a vertical circle at the end of a string, the force of the string at the bottom is: A-Less than the weight of the ball B-greater than the weight of the ball C-equal to the weight of the ball D-Zero
Can someone pls answer this question with brief explanation?
The force of the string at the bottom is greater than the weight of the ball. The correct option is B.
What is Net force?When two or more forces are acting on the system of objects, then the to attain equilibrium, net force must be zero.
A girl at a state fair swings a ball in a vertical circle at the end of a string.
When the ball is at the bottom . the force acting will be
The tension in the string , T = mass x centripetal acceleration + Force of gravity
So, T = m x ac + mg
Thus, the force of the string at the bottom is greater than the weight of the ball.
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write short notes on:
human made wetland
Any type of wetland that has been developed or maintained by humans for uses such as aquaculture, irrigation, or water storage.
What is a human-made wetland ?Any kind of wetland that has been created or kept up by people for purposes like water storage, irrigation, or aquaculture.
In India's Punjab state, in the Kapurthala district, lies the man-made Kanji Wetland, which includes the Kanji Lake.
In order to give irrigation facilities to the hinterland, it was built by building the headworks over the perennial Bien River, a tributary of the Beas River.
The Sunderbans are India's biggest wetland. The world's biggest mangrove forest includes Sunderban Wetland.
Hence, the human-made wetland is an artificial wetland.
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kepler’s second law of planetary motion states ""a line from a planet to the sun sweeps over equal areas in equal intervals of ____.""
Kepler's second law of planetary motion states, 'a line from a planet to the sun sweeps out equal areas in equal intervals of time.'
What are Kepler's laws of planetary motion?Kepler's three laws of planetary motion include
All planets orbit the sun in elliptical orbits with the sun as the focusA line from a planet to the sun sweeps out equal areas in equal intervals of timeThe square of the period of any planet is directly proprtional to the cube of the semi-major axis of its orbit.From the second law, we see that, a line from a planet to the sun sweeps out equal areas in equal intervals of time.
So, Kepler's second law of planetary motion states, 'a line from a planet to the sun sweeps out equal areas in equal intervals of time.'
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which type of radio active decays
which statement illustrates how progress in engineering has affected the natural enironment
The statement that illustrates how progress in engineering has affected the natural environment is extracting mineral resources with modern mining equipment removes fertile topsoil.
What is the Natural Environment?The natural environment may be defined as anything that can be present in the surroundings of living entities whether it is a biotic or abiotic factor.
The utilization of contemporary mining tools terminates fertile topsoil and admiringly impacts the fertility of the soil. It is tough to rebuild topsoil and modern mining tools constantly damage soil fertility.
Advancement in engineering has influenced the natural environment and mining is one of the most accepted measures of this.
The complete question is as follows:
Extracting mineral resources with modern mining equipment removes fertile topsoil.Mining companies use modern equipment to extract mineral resources more efficiently.Modern mining equipment has improved the health and safety of workers.Modern mining practices provide materials that can be used for technological advances.Therefore, it is well described above.
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When you see a quantity like 20 m/s N, how do you know that it's a vector quantity and not a scalar quantity?
We know that 20 m/s N is a vector quantity because N in the expression signifies the direction
What is a vector quantity?This is a which have both magnitude and direction. Example include:
VelocityDisplacementForceAccelerationMomentWeightHow to determine whether 20 m/s N is a vector quantity20 m/s indicates just the speed i.e magnitude20 m/s N indicates the speed i.e magnitude why the N indicates the direction.Thus, we can conclude that 20 m/s N is a vector quantity because it has both magnitude and direction.
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What is the final temperature of 0.1 kg of water initially at 22 *C after 10 kj of heat is added
The final temperature of the given mass of water at the initial temperature is 45.8 ⁰C.
Change in temperature of the waterThe change in temperature of the water is calculated as follows;
Q = mcΔθ
Δθ = Q/mc
where;
c is specific heat capacity = 4200 J/kgCΔθ = (10,000)/(0.1 x 4200)
Δθ = 23.8
Final temperatureT2 - T1 = 23.8
T2 = 23.8 + 22
T2 = 45.8 ⁰C
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a 5200w electric oven
Answer:
104 kWh
Explanation:
To calculate the kWh you multiply power with the amount of hours.
So for this we take 5200 W × 20 = 104 000 Wh
Then change Wh to kWh so that makes 104 kWh
Who is responsible of refraction light 1/3 in eye
The cornea is responsible of refraction light 1/3 in eye.
What is the function of the cornea?In addition to the protective function, it plays a fundamental role in the formation of vision. Transparent, it works like a lens over the iris, focusing light from the pupil towards the retina.
Normally, the cornea and lens deflect (refract) incoming light rays, focusing them on the retina. The shape of the cornea is fixed, but the lens changes shape to focus on objects at different distances from the eye.
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Cancer and diabetes are two common hereditary diseases.
It is a true statement that cancer and diabetes are two common hereditary diseases.
What are hereditary diseases?The term hereditary diseases are those diseases that occur in parents and could also be found in their offspring. For many of these hereditary diseases, the mechanism of inheritance is unclear.
However, it is a true statement that cancer and diabetes are two common hereditary diseases.
Missing parts:
Cancer and diabetes are two common hereditary diseases. A. True B. False.
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Two people start at the same place and walk around a circular lake in opposite directions. one has an angular speed of 1.11 x 10-3 rad/s, while the other has an angular speed of 8.40 x 10-3 rad/s. how long will it be before they meet
The time taken before the two people will meet is 11 minutes.
Time taken before they meetThe time taken before the two people will meet is calculated from the principle of relative velocity.
(ω₁ + ω₂)t = θ
where:
ω₁ is angular speed of the first personω₂ is the angular speed of the second persont is time of motionθ is angular displacement(1.11 x 10⁻³ + 8.4 x 10⁻³)t = 2π
(9.51 x 10⁻³)t = 2π
t = 2π/9.51 x 10⁻³
t = 660.7 secs
t = 11 mins
Thus, the time taken before the two people will meet is 11 minutes.
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A downward force of magnitude 5 n is exerted on the book by the force of.
Answer:
A downward force of magnitude 5 N is exerted on the book by the force of ... Do the downward force in Part A (gravity) and the upward force in Part B ...
force of 5000N is acting on a body of mass 50kg if force of friction on the body is 100N. Calculate how long it takes for the body to gain the velocity of 50m/s from rest
Answer:
.5102 s
Explanation:
Net force acting to accelerate the body is 5000- 100 = 4900 N
F = ma
4900 N = 50 kg * a then a = 98 m/s^2
v= at
50 m/s = 98 m/s^2 t then t = 50/98 =.5102 s
which degree is best for science student?
Answer:
Computer Science or Science technology
Explanation:
It all depends on what aspect of science you're looking into such as biology, zoology, marine biology, etc. But since this world is evolving more and more around technology, your best bet is to get into something computer science or science technology.
two point charges of magnitude 4.0 μc and -4.0 μc are situated along the x-axis at x1 = 2.0 m and x2 = -2.0 m, respectively. what is the electric potential at the origin of the xy-coordinate system?
The electric potential at the origin of the xy coordinate system is negative infinity
What is the electric field due to the 4.0 μC charge?The electric field due to the 4.0 μC charge is E = kq/r² where
k = electric constant = 9.0 × 10 Nm²/C², q = 4.0 μC = 4.0 × 10 C and r = distance of charge from origin = x₁ - 0 = 2.0 m - 0 m = 2.0 mWhat is the electric field due to the -4.0 μC charge?The electric field due to the -4.0 μC charge is E = kq'/r² where
k = electric constant = 9.0 × 10 Nm²/C², q' = -4.0 μC = -4.0 × 10 C and r = distance of charge from origin = 0 - x₂ = 0 - (-2.0 m) = 0 m + 2.0 m = 2.0 mSince both electric fields are equal in magnitude and directed along the negative x-axis, the net electric field at the origin is
E" = E + E'
= -2E
= -2kq/r²
What is the electric potential at the origin?So, the electric potential at the origin is V = -∫₂⁰E".dr
= -∫₂⁰-2kq/r².dr
Since E and dr = dx are parallel and r = x, we have
= -∫₂⁰-2kqdxcos0/x²
= 2kq∫₂⁰dx/x²
= 2kq[-1/x]₂⁰
= -2kq[1/x]₂⁰
= -2kq[1/0 - 1/2]
= -2kq[∞ - 1/2]
= -2kq[∞]
= -∞
So, the electric potential at the origin of the xy coordinate system is negative infinity
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one of the rare galaxies that is isolated in space is likely to be a(n) ____.
The rarest type of galaxies is the elliptical double-ringed galaxy.
What is the rarest type of galaxy?elliptical double-ringed galaxy is considered as the rarest type of galaxy because of its small number. The example of such type of galaxy is PGC 1000714. Scientists suggest that about 0.1% of galaxies are of this type.
So we can conclude that the rarest type of galaxies is the elliptical double-ringed galaxy.
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draw suitable diagrams where necessary
1. describe an experiment for the measurement of specific heat capacity of a liquid by principle of mixtures
The experiment is described below in the explanation.
What is specific heat?The specific heat is the amount of heat required to change the temperature by 1°C. It is denoted by C.
Heat lost or gained is represented as
Q = m C ΔT
In a calorimeter, a liquid is filled into the the cup with a temperature. A rod with high temperature is inserted into that liquid.
We use principle of mixture by putting a heated rod in a liquid and then measuring the rise of temperature of liquid.
So, heat is lost by rod and gained by liquid and colorimeter.
Thus, experiment is described.
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HELP PLEASE!!! In the diagram, q1 = -6.39*10^-9 C and q2 = +3.22*10^-9 C. What is the electric field at point P? Include a + or - sign to indicate the direction. 91 92 P 0.150 m ** 0.250 m (Hint: The distance from q1 to P is NOT 0.150 m.) (Remember, E points away from + charges, and toward charges.) (Unit = N/C) HELP PLEASE!!
Answer:
E = K Q / R^2
E1 = K Q1 / R1^2 = K * (-6.39 E-9) / .4^2 = -K 39.9 E-9
E2 = K Q2 / R2^2 = K * 3.22 E-9 / .25^2 = K 51.5 E-9
Field will point to right of P since E2 (positive) stronger
E = K (E2 - E1) = 9.0 E9 * (51.5 - 39.9) E-9 = 104 N/C
The electric field at point P is 104.6 N/C.
What is meant by electric field ?Every place in space where a charge exists in any form has an electric attribute that can be defined as the electric field.
Here,
q₁ = -6.39 x 10⁻⁹C
q₂ = 3.22 x 10⁻⁹C
Distance from q₁ to P, d₁ = 0.4 m
Distance from q₂ to P, d₂ = 0.25 m
Electric field at P due to q₁, E₁ = k x -6.39 x 10⁻⁹/(0.4)²
E₁ = -39.9 x 10⁻⁹k N/C
Electric field at P due to q₂, E₂ = k x 3.22 x 10⁻⁹/(0.25)²
E₂ =51.52 x 10⁻⁹k N/C
Therefore, total electric field at P,
E = E₂ - E₁
E = (51.52 - 39.9) x 10⁻⁹k
E = 104.6 N/C
Hence,
The electric field at point P is 104.6 N/C.
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When the humerus moves in the glenoid fossa, the moving joint surfaces are:
When the humerus moves in the glenoid fossa, the moving joint surfaces are convex on concave.
What is Glenoid fossa?This is a bone depression in which the head of the humerus fits into to aid movement and support.
The moving joint surfaces are convex on concave in structure when humerus moves in the glenoid fossa.
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A doctor has a patient blow on one side of a U-shaped tube that is partially filled with water and has a ball floating on the other side, as shown in the image below. If the ball rises with a force of 150 N, what pressure did the patient apply to his side of the tube?
A.
0.15 Pa
b.
150Pa
c.
100,000 Pa
D.
150,000 Pa
The patient apply pressure to his side of the tube is 15 x 10⁴ N/m². The correct option is D.
What is pressure?The pressure is the amount of force applied per unit area. It is represented as
Pressure p = Force/Area
Given is a doctor has a patient blow on one side of a U-shaped tube that is partially filled with water and has a ball floating on the other side. The ball rises with a force of 150 N. The cross section are of the tube is 0.001 m³
The pressure applied is
p = 150 /0.001
p = 15 x 10⁴ N/m²
Hence, the patient apply pressure to his side of the tube is 15 x 10⁴ N/m².
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Nuclear power stations convert the nuclear energy stored in nuclear fuel into what other store of useful energy?
Answer:
The right answer is "thermal energy" or "thermal" or "heat" or "heat energy" or "electricity" or "electrical energy"
Explanation:
Nuclear fuel is used to heat water, increasing its thermal energy. This hot water is used to turn turbines that generate electrical energy.
Nuclear power stations convert the nuclear energy stored in nuclear fuel into thermal energy.
What is thermal energy?
Thermal energy is defined as a type of energy which is contained within a system which is responsible for temperature rise.Heat is a type of thermal energy.It is concerned with the first law of thermodynamics.
Thermal energy arises from friction and drag.It includes the internal energy or enthalpy of a body of matter and radiation.It is related to internal energy and heat .It arises when a substance whose molecules or atoms are vibrating faster.
These vibrating molecules and atoms collide and as a result of which heat is generated in a substance , more the collision of particles , higher is the thermal energy.It has 3 types conduction, convection and radiation.
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Where will the strongest force be excerted by the scissor blades to cut through a piece of material? Explain your answer.
Answer:
in the thick part of the scissors ✂️
Explanation:
because in physics simple machine called wedge the force applied in this thick area it have thine side used to split or piece objects
A 1.0-g string that is 0.64 m long is fixed at both ends and is under tension. This string produces a 100-Hz tone when it vibrates in the third harmonic. The speed of sound in air is 344 m/s. The tension in the string is closest to
The tension in the given string of 1.0 g and length of 0.64 m is closest to 2.84 N
Tension in the string
The tension in the string at nth harmonic is calculated as follows;
[tex]f_n = \frac{n}{2l} \sqrt{\frac{T}{\mu} }[/tex]
where;
n th harmonic = 3L is length of the string = 0.64 mμ is mass per unit length = (1 x 10⁻³ kg)/(0.64 m) = 0.00156 kg/mf is frequency = 100 HzT is tension in the string = ?[tex]f_n = \frac{n}{2l} \sqrt{\frac{T}{\mu} }\\\\\frac{f_n(2l)}{n} = \sqrt{\frac{T}{\mu} }\\\\\frac{f_n^2(4l^2)}{n^2} = \frac{T}{\mu} \\\\T = \mu (\frac{f_n^2(4l^2)}{n^2})\\\\T = 0.00156(\frac{100^2 \times 4\times 0.64^2}{3^2} )\\\\T = 2.84 \ N[/tex]
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A velocity-time graph can give you
A. Displacement of the moving object
B. Acceleration, displacement, and velocity.
C. Velocity of the moving object
D. Acceleration of the moving object
Answer:
A). Velocity time graph gives displacement..The area under V-t graph gives displacement.
More to know -
Velocity = speed/ time
it's speed with direction.
acceleration = rate of change of velocity
A velocity-time graph provides information about the motion of an object over time Acceleration, displacement, and velocity. The correct option is option (B).
Acceleration: The slope of the velocity-time graph represents the object's acceleration. A positive slope indicates positive acceleration (speeding up), a negative slope indicates negative acceleration (slowing down or decelerating), and a flat line indicates zero acceleration (constant velocity).
Displacement: The area under the velocity-time graph represents the displacement of the object. By calculating the area between the graph and the time axis, we can determine the total displacement.
Velocity: The graph directly shows the object's velocity at different points in time. The vertical position of the graph at any given time represents the object's instantaneous velocity.
Therefore, a velocity-time graph can provide information about the acceleration, displacement, and velocity of the moving object. The correct option is option (B).
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please who can give me the definition of density in terms of Archimedes principle.
[tex]\large\bold{\underline{\underline{Answer:-}}}[/tex]
The weight of the fluid displaced is equal to the buoyant force on a submerged object. The mass divided by the volume thus determined gives a measure of the average density of the object.Describe how a star is formed?
____________________________
Answer:
Star Formation
Stars are born within the clouds of dust and scattered throughout most galaxies. A familiar example of such as a dust cloud is the Orion Nebula. Turbulence deep within these clouds gives rise to knots with sufficient mass that the gas and dust can begin to collapse under its own gravitational attraction.
hy XD ~
