a 1500 kg car accelerates at a rate of 40m/s what is the amount of force​

Answer:

From the power source we have to buy only energy.

Explanation:

Energy is released when an electron loses potential energy as a result of the transfer from higher state to lower state.

Electricity is the movement of electrons between atoms and it doesn't means we can isolate the electrons from the atom and sell it. It remains the part of atom and hence only energy can be purchase form the power company.

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Elastic potential energy is given by:

\(E =\dfrac{1}{2}kx^2\)

Where k is the spring constant in N/m and x is displacement from equilibrium position in m. Evaluating:

\(E =\dfrac{1}{2}kx^2 = \dfrac{1}{2}(45\;N/m)(1.4\;m)^2 = 44.1\;J\)

A/ The potential energy is stored in the spring is 44.1 J.

Answer:

gbh

Explanation:

The diameter of the smaller end of the pipe is approximately 0.78 meters.

To determine the diameter of the smaller end of the pipe, we can use the principle of conservation of mass. According to this principle, the mass flow rate of water should remain constant throughout the pipe.

The mass flow rate is given by the equation:
Mass flow rate = density of water * cross-sectional area * velocity

Since the density of the water remains constant, we can write:
Cross-sectional area1 * velocity1 = Cross-sectional area2 * velocity2

Given that the velocity1 is 13 m/s, the diameter1 is 1.2 m, and the velocity2 is 30 m/s, we can solve for the diameter2 using the equation:
(pi * (diameter1/2)^2) * velocity1 = (pi * (diameter2/2)^2) * velocity2

Simplifying the equation:
(1.2/2)^2 * 13 = (diameter2/2)^2 * 30

Calculating the equation:
(0.6)^2 * 13 = (diameter2/2)^2 * 30

0.36 * 13 = (diameter2/2)^2 * 30

4.68 = (diameter2/2)^2 * 30

Dividing both sides by 30:
0.156 = (diameter2/2)^2

Taking the square root of both sides:
0.39 = diameter2/2

Multiplying both sides by 2:
0.78 = diameter2

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The obvious major issue is that Wind and Solar energies are intermittent. They need to be supplemented with another source.

Batteries are harmful to the environment if installed in large quantities to back up solar and wind power. Right now, we have to. In the United States, we get around this by importing the ingredients used to create batteries. We export pollution so that we can purchase batteries (or the materials to make batteries).

One further subtle issue is that the times they work are strongly connected, at least in many regions. In many places, it is windier throughout the day, therefore we obtain wind power when we don't need it since we also have solar power.

The alternative or solution to wind and solar are to use Hydro Electric and or Nuclear energy sources.

Wind and solar, as carbon-free, renewable energy sources, can help lessen the world's reliance on oil and gas.

These carbon fuels contribute to environmental degradation and climate change by emitting damaging greenhouse gases that degrade air, water, and soil quality.

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Based on the nature of constructive interference,

none of the wave intersections will produce constructive interference.

Constructive interference is interference that occurs when two waves of the same frequency amplitude and wavelength travelling in the same direction are superposed with the resultant effect of reinforcement of both waves to produce a larger wave.

Constructive interference occurs when the path difference between two identical waves at a point is:

where n = 0, 1, 2, ...

For the various intersections:

Therefore, none of the wave intersections will produce constructive interference

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Answer:

389 J

Explanation:

m = 15.0 kg, v = 7.2 m/s

Kinetic energy = mv²/2 = 15.0 * 7.2²/2 = 389 J

Answer: Here you go, i hope this kinda helps.

Explanation:Disambiguation is just a fancy way of saying "asking clarifying questions".

Watson Assistant replies to user's questions based on a confidence score.

Sometimes the customer's question could be interpreted in two or three different ways.

For example, if you say you'd like to "book a table for 8", the assistant is able to ask a clarifying question:

Did you mean booking a table for 8PM, 8AM, or booking a table for 8 guests?

Watson Assistant will ask the question when its confidence score is divided between a few options to ensure that your customers get exactly the right service they need.

Answer:

Explanation:

a = (vf - vi) / t

a = (50 - 90) / 10.0

a = -4 km/h/s(1000 m/km / 3600 s/h)

a = - 1.11 m/s²

Answer:

\(\large \boxed{42\, \mu \text{C}}$\)

Explanation:

The formula for the force exerted between two charges is

\(F=k \dfrac{ q_1q_2}{r^2}\)

where k is the Coulomb constant.

The charges are identical, so we can write the formula as

\(F=k\dfrac{q^{2}}{r^2}\)

\(\begin{array}{rcl}\text{4.0 N}& = & 8.988 \times 10^{9}\text{ N$\cdot$m$^{2}$C$^{-2}$} \times \dfrac{q^{2}}{\text{(2.0 m)}^{2}}\\\\4.0 & = & 2.25 \times 10^{9}\text{ C$^{-2}$} \times q^{2}\\\\q^{2} & = & \dfrac{4.0}{2.25 \times 10^{9}\text{ C$^{-2}$}}\\\\& = & 1.78 \times 10^{-9} \text{ C}^{2}\\q & = & 4.2 \times 10^{-5} \text{ C}\\& = & 42\, \mu \text{C}\\\end{array}\\\text{Each charge has a value of $\large \boxed{\mathbf{42\, \mu }\textbf{C}}$}\)

Answer: The period of a spring if it has a mass of 5 kg and a spring constant of 6 N/m is 5.73 sec.

Explanation:

Given: Mass = 5 kg

Spring constant = 6 N/m

Formula used to calculate period is as follows.

\(T = 2 \pi \sqrt\frac{m}{k}\)

where,

T = period

m = mass

k = spring constant

Substitute the values into above formula as follows.

\(T = 2 \pi \sqrt\frac{m}{k}\\= 2 \times 3.14 \times \sqrt\frac{5}{6}\\= 5.73 s\)

Thus, we can conclude that the period of a spring if it has a mass of 5 kg and a spring constant of 6 N/m is 5.73 sec.

Answer:

There is always space (vacuum) between particles. The particles are small objects that exist in (sometimes vast) empty space. In gas particles there's a lot more space between the particles; the particles fly around in vacuum, bumping into each other.

The circuit is a series circuit since all of the components are connected in a single path.

The current that flows through each component is the same, and the voltage across each component is proportional to its resistance.

In this circuit, there are two resistors, R1 and R2, and a battery with an electromotive force (EMF) of E.

The voltage across each resistor can be determined using Ohm's law, which states that

V = IR,

where V is the voltage

           I is the current

           R is the resistance.
The total resistance of the circuit can be calculated using the formula:

R = R1 + R2.

Using Ohm's law, the current in the circuit can be found by dividing the voltage by the total resistance:

I = E / R
The voltage across each resistor can be found using

V1 = IR1 and V2 = IR2.

The total voltage of the circuit is equal to the sum of the voltages across each resistor

V = V1 + V2

Substituting the equations for V1 and V2 into the equation for V, we get;

V = I(R1 + R2)
Thus, we can use the following equations to solve for the different variables in the circuit:
R = R1 + R2
I = E / R
V1 = IR1
V2 = IR2
V = I(R1 + R2)
Using these equations, we can calculate the current, voltage, and power of the circuit.

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Answer:

Step 1: List the mass and velocity of the object. Step 2: Convert any values into SI units (kg, m, s). Step 3: Multiply the mass and velocity of the object together to get the momentum of the object.

The approximate heat transfer through 1.65 cm of air with a temperature difference of 23.0 °C is approximately 24.4 J/s.

To approximate the heat transfer through the air layer in the double-paned window, we can assume that the glass layers have a negligible impact on the heat flow. The heat transfer can be calculated using Fourier's Law of Heat Conduction, which states that the heat flow (Q) is proportional to the temperature difference (ΔT) and inversely proportional to the thickness (L) and thermal conductivity (k) of the material.

First, we need to calculate the effective thermal conductivity of the air layer due to its thickness and the thermal conductivity ratio between air and glass. Let's denote the thermal conductivity of air as k_air and the thermal conductivity of glass as k_glass. Since glass has a thermal conductivity roughly 36 times greater than air, we have k_glass = 36 * k_air.

Next, we calculate the effective thermal conductivity of the air layer as:

k_eff = (k_air * L_air) / (L_air + k_glass)

Substituting the given values, we have:

k_eff = (k_air * 0.0165 m) / (0.0165 m + 0.005 m) = 0.01309 * k_air

Now, we can calculate the heat flow per second through the air layer using the formula:

Q = (k_eff * A * ΔT) / L_air

Substituting the given values, we get:

Q = (0.01309 * k_air * 0.760 m^2 * 23.0 K) / 0.0165 m = 24.4 J/s

Therefore, the approximate heat transfer through 1.65 cm of air with a temperature difference of 23.0 °C is approximately 24.4 J/s.

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Answer: its actually 0

Explanation: i read the khan academy hints and the answer is 0

yes the answer is 0 and if its not and have this graph its -2.0

Answer:

True

Explanation:

Walrus' kinetic energy = 2.05 x \(10^6\) J.

To calculate the walrus' kinetic energy,

we need to use the formula KE = 0.5\(mv^2\), where m is the mass of the walrus and v is its velocity.

We know the mass of the walrus is 907 kg and its velocity is 23 m/s.

Substituting these values in the formula, we get KE = 0.5 x 907 x \((23)^2\) = 2.05 x\(10^6\) J.

Therefore, the walrus' kinetic energy is 2.05 x \(10^6\) J.

It is important to note that kinetic energy is the energy an object possesses due to its motion, and is directly proportional to both its mass and velocity.

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Answer:

scalar

Explanation:

it has only magnitude and no direction (vector has both)

The given chemical formula is,

The number of oxygen atoms in the sulphuric acid formula is,

Hence,

Answer:

Explanation:

You can use \(Q = mc\Delta T=(550)(4.184)(28.8-12.7)=37049.32\) joule.

Answer:

The type of medium affects a sound wave as sound travels with the help of the vibration in particles.

Explanation:

As different mediums have different amount and size of particles, for example, the speed of sound is faster through solid than liquid as solids have closely packed particles whereas liquids are loosely packed.

The speed of sound in a given medium is determined by its density and stiffness (or compressibility in the case of gases).The speed of sound increases with the rigidity (or lack of compressibility) of the medium. The speed of sound decreases with increasing medium density.

Any material or area through which a wave is transmitted is referred to as a medium. Four variables impact a wave's speed: wavelength, frequency, medium, and temperature. The wavelength and frequency are multiplied to determine the wave speed (speed = l × f).

Therefore, The rate at which energy is transferred through a medium depends on the amplitude of the vibrations of its constituent particles; the higher this rate, the more powerful the sound wave.

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Answer:

Proxima Centauri was discovered in 1915.

Robert Innes used a blink comparator to examine a photographic plate showing an area of 60 square degrees around Alpha Centauri.

The sixty-four-meter radio telescope at Parkes Observatory in Australia.

they used the James Webb Space Telescope and The sixty-four-meter radio telescope.

no nothing as been to Proxima Centauri it would take about 54,400 years to get there.  

getting to Proxima Centauri, our solar system's nearest star, would take four years and three months. And that is travelling at light speed, a velocity well beyond our reach. The quickest we could currently get to Proxima Centauri, using our fastest rockets, is 80,000 years.

Explanation:

Explanation:

The orbiting period of a satellite at a height h from earth' surface is

T=2πr32gR2

where r=R+h.

Then, T=2π(R+h)R(R+hg)−−−−−−−−√

Here, R=6400km,h=1600km=R/4

T=2πR+R4−−−−−−√R(R+R4g)−−−−−−−−−⎷=2π(1.25)32Rg−−√

Putting the given values,

T=2×3.14×(6.4×106m9.8ms−2)−−−−−−−−−−−−√(1.25)32=7092s=1.97h

Now, a satellite will appear stationary in the sky over a point on the earth's equator if its period of revolution around the earthh is equal to the period of revolution of the earth up around its own axis whichh is 24h. Let us find the height h of such a satellite above the earth's suface in terms of the earth,'s radius.

Let it be nR.Then

T=2π(R+nR)R(R+nRg)−−−−−−−−−−√

=2π(Rg)−−−−−√(1+n)32

=2×3.14(6.4×106m/s9.8m/s2)−−−−−−−−−−−−−−−⎷(1+n)32

(5075s)(1+n)32=(1.41h)(1+n)32

For T=24h, we have (24h)=(1.41h)(1+n)32

or (1+n)32=241.41=17

or 1+n(17)23=6.61

or n=5.61

The height of the geostationary satellite above the earth's surface is nR=5.61×6400km=6.59×104km.

When a typical comet in the Oort cloud is only 1 km in diameter, then the mass of the Oort cloud is changes to  4.18×10⁹ kg.

The mass of each comet int he Oort cloud is,

mass = density × Volume

volume of sphere = 4/3(π×r²) where, r = radius of the sphere

From the given,

diameter = 1 km

radius = Diameter / 2 = 1/2(D)

Volume of the comet = 4/3 (π×r²) = 4/3 (π× (1/2 (10)³)²)

                                   = 4/3×(π) ×(1/8×10⁶)

Mass = density  × volume, where density = 1000 kg/m³

         = 1000  × 4/3×(π) ×(1/8×10⁶)

        = 4.18 ×10⁹ kg

When the typical comet in the Oort cloud is only 12 km in diameter the mass of Oort cloud is 4.18×10⁹ kg.

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Answer:

The triangle law of forces can also be stated as. if a body is in equilibrium under the action of three forces acting at a point, then the three forces can be completely represented by the three sides of a triangle taken in order. A body might be subjected to further than one force at a similar time.

Explanation:

Hope it's help

Answer:

fluctuations in the levels of female reproductive hormones

Explanation:

Women are more prone to anxiety due to a variety of biological, psychological, and cultural factors. Although the exact cause is unknown, recent research suggests that fluctuations in the levels of female reproductive hormones and cycles play an important role in women's enhanced vulnerability to anxiety.

Answer: D. stress levels, life experiences, and friends’ stresses

Explanation:

The final velocity of the car can be calculated using the formula: final velocity = initial velocity + acceleration * time. Plugging in the values you provided, we get: final velocity = 5.82 m/s + 2.35 m/s² * 3.25 s = 13.44 m/s.

Answer:

with what? I can help but with what

Answer:

2

Explanation:

Answer:

1200 m

Explanation:

s= vt

s= 20m/s × 60 s

s= 1200 m

hope it hepls

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