a car company advertizes that their new car can accelerate from rest to 70 km/s in 7 seconds. what is the car's acceleration

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What are some examples of relative motion?

Relative Motion refers to the motion or speed of any object in respect to a particular point. For example, a ball thrown upward while in a moving object such as a bus, would be traveling the same speed with respect to the bus and would fall again in relation to that speed.

Answer:

The example of relative velocity - a boat crosses a river that is flowing at some rate or an aeroplane encountering wind during its motion.

After t = 4 seconds, ascertain the baseball's vx and vy horizontal and vertical speeds. Only the pressure applied on the object's vertical component—gravity—is recognized by us. This indicates that the perpendicular speed is unchanged.

A planet and maybe other bodies pull objects toward their centers through their gravitational force. The gravitational attraction of the sun keeps all of the planets in their orbit around it.

The size of an object and its distance from other things both have an impact on gravity. The mass of a thing is a gauge for its matter content. A heavier object will fall to the ground more quickly than a lighter one. Gravitational pull weakens when the separation between two objects grows.

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Answer:

A

Explanation:

Answer:

90 degree

Explanation:

Electric field line is vertical to the electric field line.

The angle between the field line and the equipotential where an electric field line crosses an equipotential surface is 90°

This is a region of space around a charged particle, or between two voltages.

The angle between Electric field crosses an equi-potential surface is always 90 degrees. When the potential becomes constant,the negative potential gradient also becomes zero, hence necessitating the need for Electric field to be always normal with surface.

Therefore, the angle between electric field and equi-potential surface is 90 degrees.

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The weight of person on the moon can be given as,

Substitute the known values,

Thus, the weight of person on the moon is 18.7 N,

Therefore, the magnitude of the magnetic field inside the solenoid is 1.12 × \(10^{-4\) T.

The magnetic field inside a solenoid can be calculated using the formula:

B = μ0 * n * I

where μ0 is the permeability of free space, n is the number of turns per unit length, and I is the current.

First, we need to calculate the number of turns per unit length, which is given by:

n = N / L

where N is the total number of turns and L is the length of the solenoid. Plugging in the values, we get:

n = 1060 / 126 cm = 8.4138 turns/cm

To convert this to turns/meter (since SI units are used for permeability), we divide by 100:

n = 8.4138 turns/cm / 100 cm/m = 0.08414 turns/m

Now we can calculate the magnetic field using the formula:

B = μ0 * n * I

The permeability of free space is μ0 = 4π × 10^-7 T·m/A, so we have:

B = 4π × kgT·m/A * 0.08414 turns/m * 5.34 A

B = 1.12 × × \(10^{-4\)  T

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According to the data given in the question the net force on the box is of 5 N.

All of the forces that are applied to an object are added up to form the net force. As a consequence of the fact that it (force) is a vector and therefore that two forces with identical magnitudes and opposing directions cancel each other out, the resultant force is the total of the forces, or put another way, the net force is just the total of all the forces.

Given data :

Force on box to the left side (F1) = 15 N

Force on box to the right side (F2) = 20 N

Because both forces are in opposite direction

Hence,

Net force = F2 - F1

Net force = 20 - 15

Net force = 5 N.

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The total resistance in a series circuit is equal to the sum of the individual resistances. Therefore, the total resistance in this circuit would be 1 + 2 + 10 = 13 Ohms. So the answer is A) 13 Ohms.

the total resistance in a series circuit consisting of three resistances: 1 Ohm, 2 Ohms, and 10 Ohms.

To find the total resistance in a series circuit, you simply add the individual resistances together.
Add the resistances
1 Ohm + 2 Ohms + 10 Ohms = 13 Ohms

So, the total resistance in this series circuit is 13 Ohms.

The total resistance in a series circuit is equal to the sum of the individual resistances. Therefore, the total resistance in this circuit would be  13 Ohms.

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The increasing order of the wavelength from left to right are as follows Gamma Rays <  X-rays < UV rays < visible rays < infrared rays < microwaves < radio waves.

The electromagnetic spectrum consists of many waves which are made up of electric field and the magnetic field.

It is said that the electromagnetic wave behaves like particle as well as the wave.

The particle like pieces of the wave are called photons which contains the energy of the wave and the electromagnetic waves are primarily decided by the wavelength and the frequency of the wave.

The group of electromagnetic waves are known as electromagnetic spectrum.

The electromagnetic wave in the order of increasing wavelength are Gamma Rays <  X-rays < UV rays < visible rays < infrared rays < microwaves < radio waves.

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To draw the reflected segments of the three special rays and label them Ray1r, Ray2r, and Ray3r,

Step 1: Identify the three special rays (Ray 1, Ray 2, Ray 3) and the point where they hit the reflecting surface.

Step 2: For each ray, use the Law of Reflection, which states that the angle of incidence is equal to the angle of reflection.

Measure the angle between the incident ray and the surface normal (a perpendicular line to the surface) and ensure the reflected ray has the same angle with the surface normal.

Step 3: Draw the reflected rays (Ray1r, Ray2r, Ray3r) by maintaining the measured angles from Step 2.

Step 4: Extend the reflected rays until they converge (meet) at a point.

Step 5: Record the exact angles of reflection for each ray (Ray1r, Ray2r, and Ray3r). The angles of reflection should be equal to their corresponding angles of incidence, as per the Law of Reflection.

By following these steps, you will have successfully drawn the reflected segments of the three special rays and found their exact angles of reflection.

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The pressure exerted by the water at the bottom of the well is 170000 Pa.

We can use the formula for pressure due to a liquid:

pressure = density × gravity × height

where;

Assuming the density of water is 1000 kg/m³ and the acceleration due to gravity is 9.81 m/s², we can calculate the pressure at the bottom of the well as:

pressure = 1000 kg/m³ × 9.81 m/s² × 17 m

pressure = 166970 Pa

Rounding off to two significant figures, the pressure exerted by the water at the bottom of the well is 170000 Pa.

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Answer:

The difference in tension,  between adjacent sections of the pull cable at the given conditions is 17.701 kN

Explanation:

We take the cars as moving upwards such that the resultant pulling force on the car, F, along the cable is given by the relation

\(F_{car}\) = Upward tension force,  \(Tension_{(upwards)}\) - Downward tension force, \(Tension_{(downwards)}\) - Component of the weight of the car along the taut cable

The parameters given are;

Mass of car, m = 2750 kg

Angle of inclination of taut cables, θ = 35°

The upward acceleration of the car, a = 0.81 m/s²

Given that the weight is acting vertically downwards, we have;

Component of the weight of the car along the taut cable = m × g × sin(θ)

∴ Component of the weight of the car along the taut cable = 2750 × 9.81 × sin (35°) = 15473.66 N

We therefore have;

\(F_{car}\) =  \(Tension_{(upwards)}\) - \(Tension_{(downwards)}\) - 15473.66 N

\(F_{car}\)  = m × a = 2750 × 0.81 =  \(T_{upwards}\) - \(T_{downwards}\) - 15473.66

∴  \(Tension_{(upwards)}\) - \(Tension_{(downwards)}\) = 2750 × 0.81 + 15473.66 = 17701.16 N

Hence the difference in tension,  \(Tension_{(upwards)}\) - \(Tension_{(downwards)}\) between adjacent sections of the pull cable if the cars are at the maximum permissible mass and are being accelerated up the incline = 17701.16 N or 17.701 kN.

The weight of a person on the moon given that the mass of the person on Earth is 105 lbm is 17.3 lbf.

Force is defined as the influence that produces a change in motion of an object. The unit of force is newton (N), which is defined as the amount of force that can accelerate a mass of 1 kg at a rate of 1 meter per second squared (m/s²).

The weight of an object is the gravitational force acting on the object. It is directly proportional to the mass of the object and the acceleration due to gravity. The unit of weight is newton (N).

Formula to calculate weight:

Weight (N) = mass (kg) × acceleration due to gravity (m/s²)

Conversion from lbm to kg:1 lbm = 0.453592 kg

Acceleration due to gravity on the moon is 1.622 m/s².

Therefore, Weight (N) = mass (kg) × acceleration due to gravity (m/s²)

Weight on Earth = 105 lbm

= 47.63 kg

Weight on Moon = 47.63 × 1.622

Weight on Moon = 77.19 N

= 17.3 lbf

Therefore, the weight of a person on the moon given that the mass of the person on Earth is 105 lbm is 17.3 lbf.

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Answer:

Solar panels have increased in efficiency over the past 20 years

Explanation:

Because if efficiency have increased other technologies will be discovered

Answer:

Solar panels have increased in efficiency over the past 20 years

Explanation:

Explanation:

70N-40N=30N

The natural length of the spring is therefore 12.97 cm.

The natural length of the spring is found by calculating the spring constant using the Hooke's law formula. Spring constant (k) = Force (F) / extension (x). The natural length of the spring refers to the length of the spring when it is not carrying any load. Hooke's law states that the force required to extend or compress a spring by a distance x is proportional to that distance. Mathematically, F=kx, where F is the force applied, x is the displacement from the equilibrium position, and k is the spring constant. To find the natural length of the spring, we need to calculate the spring constant.

To do this, we use the data given in the problem. A load of 12 kg stretches the spring to a total length of 15 cm. We can find the force applied by multiplying the load by the acceleration due to gravity (g), which is 9.8 m/s^2. Thus, F = mg = 12 * 9.8 = 117.6 N. The extension of the spring is given as x = 15 cm - x0, where x0 is the natural length of the spring. Thus, x = 0.15 m - x0. Substituting these values into Hooke's law, we get: k = F/x = 117.6/(0.15 - x0)

Similarly, when a load of 30 kg stretches the spring to a length of 18 cm, we can find the force applied as F = mg = 30 * 9.8 = 294 N. The extension is given as x = 0.18 m - x0. Substituting these values into Hooke's law, we get: k = F/x = 294/(0.18 - x0)

Now we have two equations for k, so we can set them equal to each other: 117.6/(0.15 - x0) = 294/(0.18 - x0) Cross-multiplying and simplifying, we get: 117.6(0.18 - x0) = 294(0.15 - x0) 21.168 - 117.6x0 = 44.1 - 294x0 176.4x0 = 22.932 x0 = 0.1297 m

The natural length of the spring is therefore 12.97 cm.

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The reactance of a 5.70 μF capacitor at a frequency of 80.0 Hz is 14.1Ω.

What is reactance?

Reactance is the opposition of a capacitor, inductor, or AC circuit to AC current due to the changing voltage across the component. A capacitor's reactance is calculated using the following formula: Xc = 1 / 2πfCWhere, Xc is the capacitive reactance, f is the frequency of the current, and C is the capacitance of the capacitor.

To calculate the reactance of a 5.70 μF capacitor at a frequency of 80.0 Hz, substitute the given values into the formula: Xc = 1 / 2πfCXc = 1 / (2 × 3.14 × 80 × 5.70 × 10⁻⁶)Xc = 1 / 0.0288Xc = 34.72ΩThe capacitive reactance of a 5.70 μF capacitor at a frequency of 80.0 Hz is 34.72Ω.

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Answer:

minimize some of the steel and the handrails would be a lot more safer for the children

Explanation:

I would like to minimize the heat transfer from the handrails because when it is decrease, the friction will increase.

Any or all of a number of events, referred to as processes, known as heat transfer, are capable of moving energy + entropy from one place to another. Typically, convection, nonlinear thermal, etc. conduction are used to describe specific methods. It involves the slow, energy- and entropy-transfer-involved process of conduction between adjacent molecules.

A hot fluid, such as air, must move during convective; this process is typically quite quick.

Radiation is indeed the term for the electromagnetic radiation that is used to describe how energy is transferred from its emission at a heated surface to its absorption on that other surface without a medium.

The reason behind minimizing the heat transfer from the handrails is because when the heat transfer is decreased, the friction in the rails will increase, and it will be easy to hold them for support.

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Answer:

Thank me mark me brainliest pls

Answer: Chloroplast

Explanation: Chloroplasts work to convert the Sun's light energy into sugars that cells can use. It's like a solar panel that converts energy from sunlight into electric power.

The photon with an energy of \(9.01 * 10^{-19}\) J has a wavelength of approximately 220.3 nm.

To find the wavelength of a photon given its energy, we can use the equation:

E = hc/λ

Where:

E is the energy of the photon,

h is the Planck's constant (approximately 6.62607015 × 10^-34 J·s),

c is the speed of light in a vacuum (approximately 2.998 × 10^8 m/s),

λ is the wavelength of the photon.

Rearranging the equation to solve for λ, we have:

λ = hc/E

Given:

\(E = 9.01 * 10^{-19}\) J

Substituting the known values:

\(\lambda = \frac{(6.62607015 * 10^{-34} * 2.998 * 10^8 )}{(9.01 * 10^{-19}}\)

\(\lambda = \frac{(1.98644591 * 10^{-25})}{(9.01 * 10^{-19})}\)

\(\lambda \approx 2.203 * 10^{-7} m\)

To convert this wavelength to nanometers, we can multiply by 10⁹:

=λ ≈ 220.3 nm.

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The heat lost by water is equal to the heat gained by ice here. The heat lost from water for a temperature change of 25 to 10 degree Celsius is 12300 J.

Calorimetry is an analytical technique used to determine the heat energy absorbed or evolved by a system. The calorimetric equation relating the heat energy q with the mass m, specific heat c and the temperature difference ΔT is :

q = m c ΔT

Here, the heat energy gained by the dry ice is equal to the heat lost from water.

temperature difference for water = 25- 10 °C = 15°C

thus, 15°C is lost from water.

mass of water = 200 g

q =200 g × 4.12 J/°C g × 10°C = 12300 J

Therefore, the heat energy lost from water is 12300 J.

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Transcranial magnetic stimulation (TMS)  is a technique that has been used to temporarily disturb brain area functioning in humans

TMS is a technique that has been used to temporarily disturb brain area functioning in humans. It involves the use of magnetic fields to stimulate or inhibit nerve cell activity in the brain.

TMS is used to study brain function, treat medical conditions such as depression and obsessive-compulsive disorder, and develop new treatments for neurological disorders.  

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The distance between central maxima and minima of order 12 in nm 519.78 nm.

The valuable most are the brightest vital part of the diffraction sample. The principal most is the widest and has the central maxima depth. The principal width is simply the gap among the first-order minima on both aspects of the display screen from the center.

As the width length, 'a', is accelerated, the attitude 'T' at which the intensity first processes zero decreases, ensuing in a narrower central band.

use the equation Y = mL R/d

where

Y is the fringe width

m is order

L is wavelength

R is the distance from the slit to the screen

d is the slit width

so

R19  = 19 * LR/d = 823 nm

LR/d  = 823 nm/19

R12  = 12  * LR/d = ?

R12   = 12* 823 nm/19

R12  = 519.78 nm

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Answer:

1-a

2-d

3-c

4-b

Explanation:

i tookt he words and put it in the sentance and these made most sence to me

Answer:two different r resistors in parallel always have the same U; two resistors in series always have the same I.

Explanation:

If two different r resistors in parallel always have the same voltage or potential difference across them and if two resistors in series always have the same electric current passing through them .

Resistance is the obstruction of electrons in an electrically conducting material .

The mathematical relation for resistance can be understood with the help of the empirical relation provided by Ohm's law .

V = I × R

The voltage is the same if the resistance is connected in a parallel arrangement .

The current is the same if the resistance is connected in a series arrangement .

Thus , If the voltage or potential difference across two separate resistors connected in parallel is always the same, as well as the electric current flowing through two resistors connected in series .

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Answer:

Radiation travels by Waves!!

Explanation:

BONUS:Thermal radiation is a longitudinal wave.

Hope this helped

Answer:

Radiation transfers   energy by  ⇒ electromagnetic  waves. These waves transfer energy from a warmer object to a cooler object, with or without  ⇒ matter .

Explanation:

edge2022

The main difference between Newtonian Science (Classical Science) and Quantum Science (Quantum Physics/Quantum Mechanics) lies in their fundamental principles and the scales at which they apply. Newtonian Science describes the motion of macroscopic objects in a deterministic manner using classical mechanics, while Quantum Science deals with the behavior of microscopic particles and is characterized by probabilistic predictions and wave-particle duality.

Newtonian Science (Classical Science): Newtonian Science is based on the laws of classical mechanics formulated by Sir Isaac Newton. It describes the motion of macroscopic objects, such as planets, projectiles, and everyday objects. It assumes that objects have definite positions and velocities, and their behavior is deterministic. The laws of motion, such as Newton's laws, provide precise predictions of the behavior of objects.

Quantum Science (Quantum Physics/Quantum Mechanics): Quantum Science is a branch of physics that deals with the behavior of particles at the atomic and subatomic level. It was developed in the early 20th century to explain phenomena that classical physics couldn't account for. Quantum mechanics introduces the concept of wave-particle duality, where particles exhibit both wave-like and particle-like properties. It uses mathematical formalism, such as wave functions and probability distributions, to describe the behavior of particles. Quantum mechanics is probabilistic in nature, providing predictions of the likelihood of different outcomes rather than precise deterministic predictions.

The main difference between Newtonian Science (Classical Science) and Quantum Science (Quantum Physics/Quantum Mechanics) lies in the scales at which they apply and their fundamental principles. Newtonian Science describes the motion of macroscopic objects using classical mechanics and provides deterministic predictions. On the other hand, Quantum Science deals with the behavior of microscopic particles, introduces wave-particle duality, and provides probabilistic predictions. Quantum mechanics revolutionized our understanding of the microscopic world, challenging the deterministic worldview of classical mechanics and laying the foundation for many modern technological advancements.

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When a ferromagnetic material is placed in an electromagnetic coil and a magnetic field is applied, the magnetic induction (B) is increased.

Therefore, the correct answer is:

(a) There is a large increase in the magnetic induction (B)

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