A car travelling at a velocity of 15 ms due north speeds up uniformly to a velocity of 30 ms¹ in 3 seconds. Calculate its acceleration.[assume g=10 m/s^2]​

Answer: D (Wave 4, Wave 3, Wave 1, Wave 2)

The arrangement of these waves in order of increasing frequency is;Wave 4, Wave 3, Wave 1, Wave 2.

A wave is a disturbance along a medium that transfers energy. We have to note that waves are shown in the manner that is depicted by the images shown in the question.

Now, the arrangement of these waves in order of increasing frequency is;Wave 4, Wave 3, Wave 1, Wave 2.

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i think the answer is neutron

:)

Answer: S = 1.91x10^(-23) J/K

Explanation:

The statistical definition of entropy says that:

S = k*Ln(W)

where:

W is the number of macrostates, in this case W = 4.

k is a constant:

k = 1.38x10^(-23) J/K

then the entropy of this system will be:

S = (1.38x10^(-23) J/K)*ln(4) = 1.91x10^(-23) J/K

Then the correct option is C.

Answer:

C. 1.91 × 10–23 joules/kelvin

can i be marked brainiest, please? Explanation:

Answer:

Dietz

Explanation:

He is the guy you must justt be smart and know stuff.

Answer:

ok

Explanation:

Answer:

The change of movement depends on the force that acts and the length of time it acts.

Because of how large Earth is, an ant's exploration of it makes it appear flat. It appears that the Big Bang theory explains how components were created in the first few minutes following the Big Bang.

Contrary to popular belief, Earth doesn't provide an official international name. The word "Terra" is merely a common misunderstanding of the scientific name for the planet. "Earth" is the commonly used English name for the planet, particularly in scientific contexts.

A planet like the Earth revolves around a star called the sun. A star is typically understood to be a mass of gas that is sufficiently massive and dense to enable nuclear fusion to occur at its core.

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The electric field required to create a current of 30.0 amperes in an aluminium wire of the same diameter is\(1.091 * 10^9 N/C\).

The formula that relates current (I), electric field (E), and resistivity (ρ) is given by Ohm's Law:

E = I / (ρ * A),

where A is the cross-sectional area of the wire. In this case, since we are assuming the same diameter for both wires, the cross-sectional area remains constant.

For calculating the electric field (E'), rearrange the formula as:

E' = I / (ρ * A).

Given that the current (I) is 30.0 amperes and the resistivity (ρ) of aluminium is \(2.75 * 10^{(-8)}\) ohm-meters, substitute these values into the formula:

\(E' = 30.0 A / (2.75 * 10^{(-8)}\) ohm-meters * A).

Simplifying the equation, the area (A) cancels out, leaving:

\(E' = 1.091 * 10^9 N/C\)

Therefore, the electric field required to create a current of 30.0 amperes in an aluminium wire of the same diameter is\(1.091 * 10^9 N/C\).

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The complete question is:

What electric field E' would have been required to create a current of 30.0 amperes in an aluminium wire of the same diameter? The resistivity p of aluminium is \(2.75 *1\)\(0^{-8}\) ohm-meters.  Express your answer in newtons per coulomb. Use three significant figures.

The percent uncertainty in the measurement of an infant's pulse rate, which is recorded as 135 +/- 6 beats/min, is 4.4%.

The percent uncertainty is calculated by dividing the range of the measurement (in this case, 6 beats/min) by the average value of the measurement (in this case, 135 beats/min), and then multiplying by 100 to express it as a percentage. In this case, the range is 6 beats/min and the average value is 135 beats/min. Dividing 6 by 135 gives 0.0444, and multiplying by 100 gives 4.44%. Therefore, the percent uncertainty in this measurement is 4.4%.

This measurement indicates that the pulse rate of the infant can vary within a range of +/- 6 beats/min from the average value of 135 beats/min. The percent uncertainty provides a measure of the relative variability or precision of the measurement. A lower percent uncertainty would indicate a more precise measurement with less variability, while a higher percent uncertainty would indicate a less precise measurement with greater variability. In this case, a percent uncertainty of 4.4% suggests a reasonably precise measurement of the infant's pulse rate.

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(a) The tangential speed of the discus at the release is 15 m/s.

(b) The centripetal acceleration of the discus is 225 m/s².

(c) The centripetal force on the discus is 360 N.

The given parameters;

The tangential speed of the discus at the release is calculated as follows;

\(v = \omega r\\\\v = 15 \ rad/s \ \times 1 \ m\\\\v = 15 \ m/s\)

The centripetal acceleration of the discus is calculated as follows;

\(a_c = \frac{v^2}{r} \\\\a_c = \frac{15^2}{1} \\\\a _c = 225 \ m/s^2\)

The centripetal force on the discus is calculated as follows;

\(F_c = ma_c\\\\F_c = 1.6 \times 225\\\\F_c = 360 \ N\)

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Answer:

250N

Explanation:

Given parameters:

Time  = 4s

Momentum  = 1000kgm/s

Unknown:

Force  = ?

Solution:

To solve this problem, we use Newton's second law of motion;

      Ft  = Momentum

F is the force

t is the time

So;

          F x 4 = 1000kgm/s

          F  = 250N

Answer:

A. wind blows from the land toward the sea.

B. that this happens because the land cools faster than the sea, and, as a result, the air over land cools faster, which creates an area of higher pressure on land and lower pressure over the sea.

Explanation:

bc I am smrt

PLZ thank five star

and brainliest would be appreciated:-)

When should the first stage of the booster be jettisoned (at maximum velocity, maximum acceleration, maximum altitude, or at some other time)?

When a multi-stage booster is fired into space, the mass of the booster changes as the fuel is burned during flight. This change in mass influences the acceleration of the booster in a significant way. The effect of mass on acceleration is given by Newton's second law of motion, which states that the acceleration of an object is directly proportional to the force acting on it and inversely proportional to its mass. As the mass of the booster decreases due to the burning of fuel, its acceleration increases to maintain a constant force acting on it.

The booster should be jettisoned at maximum acceleration because at this point, the fuel is almost spent, and the weight of the remaining fuel and the booster's structure is at its lowest. This helps to increase the maximum acceleration of the booster.

At maximum velocity, the booster may still have fuel and additional boosters, so it may not be the optimal time to jettison the first stage. At maximum altitude, the booster may not have reached its maximum acceleration and may still have fuel, so it is not the best time to jettison the first stage either.

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Answer:

true?

Explanation:

ANSWER

EXPLANATION

To find the pressure of the kerosene at the tap, we have to apply the relationship between pressure and density:

where ρ = density

g = acceleration due to gravity = 9.8 m/s^2

h = height

Therefore, the pressure of the kerosene at the tap is:

That is the answer.

Answer: \(0.708\ mA\)

Explanation:

Given

\(E_o=20\ V/m\)

\(\omega =10^7\ s^{-1}\)

Cross-sectional area \(A=0.40\ m^2\)

Current density is given by

\(J=\epsilon_o \dfrac{dE}{dt}\)

Displacement current

\(\Rightarrow I=JA\\\Rightarrow I=8.854\times 10^{-12}\times 20\times 10^7\times 0.4\\\Rightarrow I=0.708\times 10^{-3}\ A\)

The required value of the maximum displacement current of the given space is  \(7.08 \times 10^{-4} \;\rm A\).

Given data:

The intensity of electric field is, \(E_{0}=20 \;\rm V/m\).

The angular frequency of electric field is, \(\omega=1.0 \times 10^{7} \;\rm s^{-1}\).

The cross-sectional area of space is, \(A =0.40 \;\rm m^{2}\).

In the given problem, the instantaneous electric field is given by \(E = E_{0} \times cos(\omega t)\)

So, the expression for the current density is,

\(J= \epsilon_{0} \times \dfrac{dE}{dt}\)

Here, \(\epsilon_{0}\)  is the permittivity of free space. Solving as,

\(J= \epsilon_{0} \times \dfrac{d(E_{0} \times cos(\omega t))}{dt}\\\\J= -\epsilon_{0} \times E_{0} \times \omega \times sin(\omega t)\)

And the expression for the maximum displacement current is,

\(I = J \times A\)

And the maximum displacement current is possible only when, J is positive and J will be positive for  \(sin(\omega t)=-1\).

Then solving as,

\(I = (-\epsilon_{0} \times E_{0} \times \omega \times sin(\omega t)) \times A\\\\I = (-8.85 \times 10^{-12} \times 20 \times (1.0 \times 10^{7}) \times (-1)) \times 0.40\\\\I = 7.08 \times 10^{-4} \;\rm A\)

Thus, we can conclude that the required value of the maximum displacement current of the given space is  \(7.08 \times 10^{-4} \;\rm A\).

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Answer:

The Desire for New Trade Routes

Extra:

European explorers found the New World by mistake; they were not looking to find new continents but new sea routes. Europeans mainly wanted to find better trade routes to China, India, and Southeast Asia.

please give brainliest if possible

Answer: the water level would rise since the pebble displaces minimal water compared to the boat.

Explanation:..........

the characteristics of the a 10 L ideal gas vessel filled with it at a pressure of 10 atm and temperature of 300 K. any desired changes in the vessel's volume or pressure. 30L of liquid will be produced at constant pressure when the temperature is 200 k.

That amount of force delivered perpendicularly to an object's surface in relation to its area is known as pressure. Pressure is a force-area relationship; pressure = force area. Pascal is the SI pressure measurement (pa).

The formula for calculating pressure is P = F / A, or force for unit of the surface area. The SI unit in measuring pressure is the pascal, and the sign for pressure in physical science is p. (symbol: Pa). One Newton per sq.m of force exerted perpendicularly on a surface is equal to one pascal.

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The true statement about the input and output forces include the following:

This is defined as an influence which can cause an object with mass to change its velocity.

For a screw to be inserted into a block of wood, the input force on the screw has to be greater than the output force as a result of both forces being in opposite direction to one another.

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The laser is fired at a diffraction grating with 800 lines per cm, again 2.0 m from the screen behind it. The distance between the slits in the diffraction grating is 1.25 x 10^(-5) meters.

To determine the distance between the slits in the diffraction grating, we need to use the formula:

d = 1 / N,

where d is the distance between the slits and N is the number of lines per unit length on the grating.

Given that the diffraction grating has 800 lines per cm, we can convert it to lines per meter:

N = 800 lines/cm = 800 lines / (0.01 m) = 80000 lines/m.

Now we can substitute this value into the formula to calculate the distance between the slits:

d = 1 / N = 1 / 80000 lines/m = 1.25 x 10^(-5) m.

Therefore, the distance between the slits in the diffraction grating is approximately 1.25 x 10^(-5) meters.

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Answer:

Knees to Chest

Be consistent. Setting and committing to a regular practice of yoga is absolutely essential if you want to make improvements. ..

Answer: Dog pose was really easy, but tree pose was really difficult because it was hard to balance.

Answer:

A cloud chamber, also known as a Wilson cloud chamber, is a particle detector used for visualizing the passage of ionizing radiation.

Explanation:

Answer: A cloud chamber, also known as a Wilson cloud chamber, is a particle detector used for visualizing the passage of ionizing radiation.

Explanation: i got it right on my quiz .

According to Lenz's law, the induced current in a circuit always flows to oppose the external magnetic field through the circuit. According to Lenz's law, the induced current in a circuit always flows to oppose the external magnetic field through the circuit. True or False.

True, The current induced in a circuit due to a change in a magnetic field is directed to oppose the change in flux and to exert a mechanical force which opposes the motion.

Because like magnetic poles repel each other, Lenz's law states that when the north pole of the bar magnet is approaching the coil, the induced current flows in such a way as to make the side of the coil nearest the pole of the bar magnet itself a north pole to oppose the approaching bar magnet.

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Assume the angle of the mirror relative to the horizontal in figure 16.12 is 0 = 20°. The reflected beam forms a 70° angle with the horizontal.

The angle of incidence i equal the angle of reflection (r), which means that:

i = r

We can use this fact to calculate the angle formed by the incident beam and the mirror. This is known as "a" angle.

a = 90° - i

a = 90° - r

Because i = r, we can simplify this to:

a = 90° - i

a = 90° - r

a = 90° - 20°

a = 70°

We can now apply the law of reflection to determine the angle that the reflected beam makes with the horizontal. According to the law of reflection, the angle of incidence equals the angle of reflection, which means:

o = r

Because we already know that the angle of incidence equals a, we can use this to calculate the angle of reflection:

o = r

o = a

o = 70°

As a result, the reflected beam forms a 70° angle with the horizontal.

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The gain in translational kinetic energy of the cylinder when it has rolled 5m down the incline of the plane is approximately 345.6 J.

Given data:

Diameter, d = 0.20 mRadius,

r = 0.10 mMass of cylinder,

m = 12 kgInclined angle, θ = 37°

Distance traveled by cylinder, s = 5m

We know that work done by the gravitational force is the change in potential energy.

W=Fhsinθ... (1)

The kinetic energy of rolling objects is equal to its rotational kinetic energy plus its translational kinetic energy.

K = 1/2Iω² + 1/2mv²... (2)

The moment of inertia of a solid cylinder I=mr²/2.

Using conservation of energy principle:

Gain in translational kinetic energy of the cylinder is equal to the loss in potential energy.

Thus,

½mv²=mgH-mgSins....(3)

When the cylinder rolls without slipping, its velocity is equal to its angular velocity multiplied by its radius

v=ωr

Therefore, the rotational kinetic energy can be expressed as

1/2Iω²=1/2mr²ω²/2.... (4)

Using equations (1), (2), (3), and (4),

we can find the gain in translational kinetic energy of the cylinder while it rolls 5m down the incline of the plane.

K=1/2mv²=1/2m(v=ωr)²=1/2mr²ω²/2=1/2Iω²=1/2(12)(0.10)²(2/2)=0.12J... (5)

Potential energy, P=mgh=mgSins=12(9.8)(5)sin37°=294.2 J... (6)

So, using equations (5) and (6), we can get the gain in translational kinetic energy of the cylinder to be approximately:

K = 294.2 J – 0.12 J = 294.08 J

Therefore, the gain in translational kinetic energy of the cylinder when it has rolled 5 m down the incline of the plane is approximately 345.6 J.

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Answer:

1. Beryllium

2. 4

3. 9

4. 0

Explanation:

• The element shown in the image is beryllium because the atom shown contains four protons and the only element with four protons is beryllium.

• The atom's atomic number is 4, because atomic number is the number of protons of an element, and the atom shown contains 4 protons.

• The mass number of the atom is 9. Mass number is the sum of the number of protons and neutrons in the nucleus of an atom, and the atom shown contains 4 protons and 5 neutrons; therefore its mass number is (4 + 5 =) 9.

• The charge of the atom is 0. This is because it has 4 protons which give it a +4 charge, but it also has 4 electrons which give it a -4 charge. Therefore its net charge is: 4 + (-4) = 0.

The plane travels a distance of 325 miles if the airplane travels for 2.5 hours at an average speed of 130 miles per hour. Using the distance formula (d = rt), we can calculate the distance.

To find the distance traveled by the airplane, we can use the distance formula, which is represented as d = rt. In this formula, "d" represents the distance, "r" represents the rate or speed at which the object is traveling, and "t" represents the time taken for the travel.

Given that the airplane travels for 2.5 hours at an average rate of 130 miles per hour, we can substitute these values into the formula. The rate of the airplane is 130 miles per hour, and the time taken is 2.5 hours.

Using the formula, we can calculate the distance traveled as follows:

d = rt

d = 130 mph × 2.5 hours

Multiplying the rate (130 mph) by the time (2.5 hours) gives us:

d = 325 miles

Therefore, the airplane travels a distance of 325 miles during the 2.5 hours of travel at an average rate of 130 miles per hour.

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When a light rain falls after oil and gasoline have leaked onto the road surface, it can cause the car to become less responsive and more difficult to control.

This is because the oil and gasoline act as a slippery layer on the road surface, which reduces the friction between the tires and the road. The rainwater can then mix with the oil and gasoline, making the layer even more slippery and reducing the vehicle's grip on the road.

To help mitigate this issue, drivers should be aware of their surroundings and the potential for slippery surfaces, and should adjust their speed and driving accordingly. Additionally, using tires with greater tread, or using more aggressive tires designed for wet and slippery conditions, can also help increase the vehicle's grip on the road.

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The acceleration of a particle is a= (-1.6 v1/2) m/s². The initial velocity of the particle is u = 8 m/s.

Now, let's use the formula: 2as = v² - u², where a = (-1.6v^(1/2)) m/s², u = 8 m/s, and v = 0 m/s 2 × (-1.6v^(1/2)) × s = 0 - 8²s = 64 / (2 × 1.6v^(1/2)) = 20v^(1/2)/4 = 5v^(1/2) meters.

This is the distance travelled by the particle before it stops.

We know that the final velocity of the particle is 0 m/s. The initial velocity of the particle is 8 m/s.

The acceleration of the particle is a = (-1.6v^(1/2)) m/s².

Let's use the formula to calculate the time it takes to stop the particle. It is:v = u + at 0 = 8 + (-1.6v^(1/2)) × t t = 8 / (1.6v^(1/2)) t = 5 / v^(1/2) seconds.

This is the time taken by the particle to come to rest.

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The particle travels approximately 12.5 meters before it comes to a stop. It takes approximately 5 seconds for the particle to reach zero velocity.

To determine the distance traveled before the particle comes to a stop, we need to integrate the velocity function over time. The given deceleration is expressed as a = -1.6√v , where v is the velocity in m/s. Since the initial velocity is 8 m/s, we can write the deceleration as a = -1.6√8. Integrating the acceleration with respect to velocity gives us the equation: ∫dv/(-1.6√v ) = ∫dt. Simplifying the integral and solving for t gives us t = 5 seconds.

To find the distance traveled, we integrate the velocity function with respect to time. The velocity function is given by dv/dt = -1.6√v. Separating variables and integrating, we get ∫dv/√v  = ∫-1.6dt. Evaluating the integral and substituting the limits (from v = 8 m/s to v = 0), we find √v = -1.6t + C. Applying the initial condition v(0) = 8, we can solve for C and obtain C = √8. Plugging in the values for t and C, we get √v = -1.6t + √8. Squaring both sides and solving for v, we find v = \((1.6t - \sqrt{8} )^{2}\). Integrating the velocity function again with respect to time, we get ∫\((1.6t - \sqrt{8} )^{2}\) dt = ∫ds. Evaluating the integral and substituting the limits, we find s = 12.5 meters.

Therefore, the particle travels approximately 12.5 meters before coming to a stop.

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