a car with initial velocity 30.0 m/s decelerates with constant acceleration -5.0 m/s2 until the car comes to a stop. how far does the car travel before it comes to rest?

Answer:

v_f = -7.5 m / s

Explanation:

Let's analyze this exercise a little, two forces that act on a body for different time intervals are indicated, each force creates an impulse and since this is a vector quantity we must add in the form of vectors. The net momentum is

we assume that the direction to the right is positive

             I = I₁ + I₂

             I = F₁ Δt₁ - F₂ Δt₂

             I = 3  1.5 - 4  3

             I = -7.5   N s

now let's use the relationship between momentum and momentum, suppose the object starts from rest (vo = 0)

             I = Δp

             I = m (v_f - v₀)

             v_f = I / m

              v_f = -7.5 / m

to finish the calculation we must assume a mass m = 1 kg

              v_f = -7.5 m / s

the negative sign in the body is moving to the left

If the needle in the galvanometer is going up, the conclusion about the motion of the magnet is it must be moving right.

The galvanometer is the device used to detect the small current when moving coil is deflected.

When the magnet is moved towards or into the coil of wire, the magnetic field will change and voltage will be generated into the coil. The coil  must be moving to the right when galvanometer going up.

Thus, the conclusion about the motion of the magnet is, it must be moving to the right.

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Answer:

The answer to your problem is, \(3.125 * 10^{19}\) in electrons per second

Explanation:

5A current is passing through the copper wire and the light bulb; it means that 5 Coulombs of charge per second is passing through the wire (as current = coulombs/second). To find the electrons per second, the following formula is used:

Electrons per second =

\(N_{e} = \frac{5}{e} = \frac{5}{1.60-10^{-19} }\)

\(= 3.125 * 10^{19}\)

Thus the answer to your problem is, \(3.125 * 10^{19}\)

To find Jupiter's magnetic dipole moment, we must use the formula given below:M = B × r³ ÷ 2μ₀Where:M = Magnetic dipole momentB = Magnetic field strengthr = Radius of the planetμ₀ = Magnetic constantFirst.

Given that the magnetic field strength at Jupiter's poles, B = 1.4 mT = 0.0014 TNow, the radius of Jupiter is approximately 71,492 km = 7.1492 x 10⁷ mWe can assume that Jupiter's magnetic field can be approximated by that of a dipole, so:μ₀ = 4π × 10⁻⁷ T m/A.

The magnetic dipole moment of Jupiter using the given formula:M = B × r³ / 2μ₀M = 0.0014 T × (7.1492 × 10⁷ m)³ ÷ 2(4π × 10⁻⁷ T m/A)M ≈ 1.59 × 10²² A m²Therefore, the magnetic dipole moment of Jupiter is approximately 1.59 × 10²² A m².

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An electrically charged object can be used to attract any object with an opposite charge.

This is due to the fundamental principle that opposites attract and repel in physics.

Electric charge is a fundamental property of matter that gives rise to electromagnetic interactions. An electric charge, whether positive or negative, produces an electric field that surrounds it. This field exerts a force on any other charge in its vicinity that is either attracted to or repelled from it. Electric charge is a fundamental property of matter that produces a variety of electric phenomena. When the charge is concentrated in a localized region of space, the object is electrically charged. When there is a net accumulation of charge in an object, it becomes electrically charged. An electrically charged object produces an electric field in its vicinity, which exerts a force on other charged objects. An electrically charged object can be used to attract objects with an opposite charge or repel objects with the same charge.

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Answer:

Explanation: Where do the photons in the cosmic background radiation originate? mostly from the Big Bang with a small contribution from stellar nucleosynthesis. the density of ordinary (baryonic) matter in the universe. How were the cosmic background photons emitted?

Explanation:

(1) predation

(2) competition

(3) autotrophs

(4) heterotrophs

Answer:

the answer is semidiurnal

Answer:

I think it is semi-diurnal :)

Hope this helps!!

Have a great day!!

Please rate and mark brainliest!!

Answer:

it means that velocity of a body rises by 9.8m/s each second if the air resistance is nrelated

mark me

When two large, flat, parallel, conducting plates are 0.04 m apart, The lower plate is at a potential of 2 V with respect to ground. The upper plate is at a potential of 10 V with respect to ground. Point P is located 0.01 m above the lower plate. electric potential at point P is 2 V. Hence option E is correct.

In this problem,

two parallel plates are separated by a distance 0.04m (4cm),

two plates are at 2 V and 10 V, means that there is 8V of potential difference between plates which are 4 cm apart. this means that there is 2V/cm of potential difference exist between two plates because of constant electric field.

Hence there is potential difference of 2V/cm, hence for 0.01m (1cm) there exist 2 V of potential difference.

Hence option E is correct.

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The impact force of the mosquito on the car is significantly smaller than the impact force of the car on the mosquito. This is due to the fact that the car is much larger and has significantly more mass than the mosquito.

Additionally, the car's speed of 50 miles per hour also increases the force of impact. However, the impact force on the car from the mosquito is negligible and will not cause any significant damage or change in speed.

When a car moving down the highway at 50 miles per hour runs into a mosquito, the impact forces on both the car and the mosquito are equal but opposite in direction, according to Newton's Third Law of Motion. This means that the force exerted on the mosquito is the same as the force exerted on the car, but the mosquito will experience a much greater acceleration due to its smaller mass.

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Answer: The answer is B, Globular Cluster.

Explanation: Why did you delete my answer?? Anyways...

A Globular cluster has hundreds of thousands to millions of stars. Since a Globular Cluster is found to be the cluster with the most stars in it, therefore, the globular cluster is the answer.

The Globular cluster type of star system has the most stars.

It is a system that collection of all the planets and spatial bodies revolving around the sun because of the gravitational pull of the sun.

Our Solar System is based on a heliocentric model in which the Sun is assumed to reside at the central point of the planetary system.

In other words, the Sun is at the center while the Earth and other planetary bodies revolve around it.

The star system that has the most stars is known as a globular cluster.

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Answer:It's B energy is absorbed by the reaction,hope this helps

Explanation:

Any reaction in which energy is absorbed is said to be endothermic. Hence, option B is correct, but the rest are not correct.

In every chemical process, energy is involved. When new bonds form in products, energy is produced. Reactant bonds are broken using energy. Exothermic reactions are those that produce more energy when new bonds form in the products than is needed to break existing bonds in the reactants.

In contrast, endothermic reactions are the opposite. Endothermic reactions release more energy when new bonds form in the products than is required to break bonds in the reactants.

During the reaction, a large amount of energy is absorbed.

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Answer:

That rule describes how a charged particle (our electron) moving in a magnetic field will be deflected by that field at a right angle to both the field and to the direction of the particle. ... The electrons in the cathode rays would deflect toward the positively charged plates, and away from the negatively charged plates.

Explanation:

ur welcome

Answer:

A single-called organism must perform all cellular functions on its own

Explanation:

i took the test

(a) The boat moves towards the shore it is facing with a distance of 0 m.

(b) If the lovers both walk towards each other and meet at the center of the boat, the boat moves in the opposite direction with a distance of 2.58 m. The lovers meet at a distance of 1.29 m from the initial position of Juliet in the front of the boat. The direction of the boat's motion is opposite to the initial direction of Romeo's guitar.

We can solve this problem using the principle of conservation of momentum, which states that the total momentum of a system remains constant if no external forces act on it.

(a) When Juliet moves to the rear of the boat, she applies a force on the boat in the forward direction. This force causes the boat to move in the opposite direction, i.e., towards the shore. The boat and the lovers are initially at rest, so the initial momentum of the system is zero. After Juliet moves to the rear of the boat, the momentum of the system is given by

m1v1 + m2v2

where m1 and v1 are the mass and velocity of Romeo and his guitar, and m2 and v2 are the mass and velocity of Juliet and the boat after she moves to the rear.

Since there are no external forces acting on the system, the total momentum of the system must remain zero. Therefore,

m1v1 + m2v2 = 0

We can solve for v2

v2 = - m1/m2 × v1

where "-" sign indicates the direction of the velocity is opposite to that of Romeo's guitar.

Plugging in the given values, we get

v2 = - (81.0 kg)/(81.0 kg + 47.0 kg) × 0 m/s = - 0 m/s

This means that the boat and Juliet do not move in the direction of Romeo's guitar. Instead, they move in the opposite direction with a velocity of 0 m/s. Therefore, the boat moves towards the shore it is facing with a distance of 0 m.

(b) If the lovers both walk towards each other and meet at the center of the boat, their total momentum is still zero since there are no external forces acting on the system. Therefore,

m1v1 + m2v2 = 0

where m1 and v1 are the mass and velocity of Romeo and his guitar, and m2 and v2 are the mass and velocity of Juliet and the boat after they meet at the center.

Let's assume that they meet at a distance x from the initial position of Juliet in the front of the boat. Then, the velocity of Romeo and his guitar is

v1 = - x/t

where t is the time taken by them to meet at the center of the boat.

The velocity of Juliet and the boat is

v2 = x/t

Substituting these values in the conservation of momentum equation, we get

m1×(-x/t) + m2×(x/t) = 0

Solving for x, we get

x = m2/(m1 + m2) × d

where d is the initial distance between Romeo and Juliet, i.e., 2.70 m.

Substituting the given values, we get

x = (47.0 kg)/(81.0 kg + 47.0 kg) × 2.70 m = 1.29 m

The boat moves in the opposite direction with a distance of 2x, i.e., 2.58 m. The direction of the boat's motion is opposite to the initial direction of Romeo's guitar.

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About 29.5 days must elapse between first-quarter moon and the next full moon in the same cycle.

The different ways the Moon appears to Earth over the course of about a month are known as its phases. The side of the Moon that faces the Sun will be illuminated as it revolves around the Earth. The various forms of the illuminated region of the Moon that can be observed from Earth are referred to as their phases. Every 29.5 days, a new phase begins. Due to tidal locking, the same half of the Moon always faces the Earth. The same half of the Moon's surface will therefore always be covered by the phases.

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If the person is currently experiencing a sound level of 122 dB from all four jet engines, shutting down three of them would result in a reduction of the total sound intensity by a factor of 8 (2^3). This means that the new intensity would be one-eighth of the original intensity. Therefore, if the captain shut down all but one engine, the person would experience a sound level of approximately 116 dB, which is still quite loud but significantly less than the original level of 122 dB.

To calculate the new sound level, we can use the formula:
β = 10 log(I/I0)
where β is the sound level in decibels, I is the sound intensity, and I0 is the reference intensity (the lowest intensity that a human ear can detect, which is approximately 10^-12 W/m^2). Assuming that the sound intensity from one engine is the same as the sound intensity from all four engines combined (which may not be entirely accurate, but is a reasonable assumption for the purposes of this question), the new intensity would be: I_new = I_orig / 8
Plugging this into the formula, we get:
β = 10 log(I_new/I0)
β = 10 log((I_orig/8)/I0)
β = 10 log(I_orig/I0) - 10 log(8)
Since the reference intensity I0 is constant, we can simplify this to:
β = β_orig - 10 log(8)
Plugging in the original sound level of 122 dB, we get:
β = 122 - 10 log(8)
β ≈ 116 dB
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Answer:

2.67 × 10⁻⁸ N

Explanation:

In order to find the gravitational force between two objects whose masses are known, we have to use the following formula:

\(\boxed{F = G\frac{\ m_1m_2}{r^2}}\),

where:

• F ⇒ force

• G ⇒ universal gravitational constant = 6.67 × 10⁻¹¹ m³ kg⁻¹ s⁻²

• m₁, m₂ ⇒ masses of the two objects = 1000 kg

• r ⇒ distance between the objects

Therefore, if we use the formula and information from above, we get:

F = \(6.67 \times 10^{-11} \times \frac{1000 \times 1000}{(50)^2}\)

    = 2.67 × 10⁻⁸ N

Explanation:

Newton's second law says that when a constant force acts on a massive body, it causes it to accelerate.

Answer:

Explanation:

Newtons second law of motion is,

                       F  =   ma

or force is equal to mass times acceleration.

Answer:

Speed is the time rate at which an object is moving along a path, while velocity is the rate and direction of an object's movement. Put another way, speed is a scalar value, while velocity is a vector.

Explanation: I hope this help!!! :)..

Answer:

T = (27 da * 24 hr/da + 7 hr + 43 min/60 min/hr) * 3600 sec/hr = 2.36 * 10E6 sec       period of moon in sec

C = v t  = 2 pi R        circumference of orbit where v is orbital speed

ac (centripetal acceleration) =  v^2 / R = v^2 / (v t / 2 pi) = 2 pi v / t

ac = 2 pi * 1.03 * 10E3 m/s / 2.36 * 10E6 sec = 2.74 * 10E-3 m /s^2

Since the speed formula is = Distance / time

speed = distance /time

speed = metre/ seconds

speed = m/s

Answer:

a) m/s- meters per second

Explanation:

Recall that m/s (meters per second) is the official derived SI unit for speed. That is, it is length (meters) over time (second), hence m/s.

It can't be joules (J), since that is the SI unit for work & energy.

It also can't be newtons (N), since that is the SI unit for force.

Therefore, the correct answer is a) m/s- meters per second.

I hope this made sense to you, if not, feel free to let me know and I can try to provide further assistance.

Answer:

DMs are not accessible anymore. I assume Zuka is a staff member? the only way to talk to a staff member anymore is to report something, but even then, the probably won't even look at what they're deleting :/

May I have brainliest please? :)

Answer:

In the given function b(t), the variable t represents the number of years after 2008. The   domain of this function is . The range more than 258.7 would not make sense. The graph of the function is always continuous

The given function b(t) shows the population of bobcats in northern Arizona since 2008. Therefore the variable t represents the number of years after 2008.

Since t represents the number of years after 2008, which is either positive or zero, therefore the domain of this function is .

The given function is a quadratic function and the coefficient of  is negative, so it is a downward parabola. The range above the y-coordinate of the vertex doesn't make any sense.

The vertex of parabola is defined by .

Vertex of the given function is (4.2,258.7).

Thus, the range more than 258.7 would not make sense for this function.

Since the given function is a polynomial function and polynomial functions are always continuous, therefore the graph of the function is always continuous

HOPE THIS HELPS <3

Answer:

Explanation:

Generally, an increase in temperature increases the rate of a chemical reaction. Consequently, when the temperature of a reaction is raised, the molecules present in the reaction interact faster by colliding with one another and surpassing the effective collision of such reaction to bring about a high reaction rate. Similarly, in the case of the rocket launch, the same process occurs as the temperature increase will cause an increase in the reaction rate leading the hydrogen from the acid to react explosively with the oxygen from the base to form water - this makes the rocket defy gravity and launch upward.

Answer:The Sun produces energy by the process of nuclear fusion.Nuclear fusion occurs when lighter nuclei combine to produce a larger, heavier nucleus.Energy is released during nuclear fusion.Nuclear fusion requires very high temperatures and pressures.Nuclear fusion occurs in the core of the Sun when hydrogen atoms combine to form helium atoms.