a car has acceleration given by a(t) = −8e0.2tm/s2 and initial velocity 15 m/s. (a) how much time does it take the car to stop? (b) how far does the car travel in this time?

Answer:

60cm

Explanation:

30+30=60

Answer:

Electrical energy

Explanation:

electrical energy Essentials. A battery is a device that stores chemical energy and converts it to electrical energy. The chemical reactions in a battery involve the flow of electrons from one material (electrode) to another, through an external circuit. The flow of electrons provides an electric current that can be used to do work.

The magnitude of the net electric field at the origin due to the given distribution of charge is E_net = 4kQ/πR².

Given:

A semi-circle distribution with radius 'r'

Charges '+Q' and '-Q'

Calculation of net electric field:

Step 1:

The electric field for a charge is given as:

E = (kλ/R) i + (kλ/R) j         - ( 1 )

where, k is Coulomb's force constant

            λ is charge density

            R is separation distance between the charges

            i & j are unit vectors for x-axis and y-axis respectively

Step 2:

The electric field due to charge +Q is given as:

E₁ = (kλ/R) i - (kλ/R) j      - ( 2 )  

The electric field due to charge -Q is given as:

E₂ = (kλ/R) i + (kλ/R) j     - ( 3 )

Step 3:

Thus, the net electric field will be given as:

E_net = E₁ + E₂

Applying values in above equation, we get:

E_net = (kλ/R) i -(kλ/R) j + (kλ/R) i + (kλ/R) j

          =( kλ/R) [ i - j + i + j ]

          = 2i (kλ/R)                                     -( 4 )

Step 4:

Now, we know that the linear charge density is given as:

λ = Charge/length

   = Q/(πR/2)

   = 2Q/πR

Applying the value in equation 4, we get:

E_net = 2i (k(2Q/πR)/R)

          = 4i (kQ/πR²)

          = 4kQ/πR²

Therefore, the net electric field due to the given charge distribution is of magnitude 4kQ/πR² directed along the positive x-axis.

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Answer:

Average speed = 2.5 mph

Distance = 22.352 meters

Explanation:

Calculate speed, distance or time using the formula d = st, distance equals speed times time.

Calculate speed, distance or time using the formula d = st, distance equals speed times time.

You can use this formula for any question like this

Answer:

hertz

Explanation: play piano

Based on the time difference between the P-wave and S-wave arrivals on the seismogram, the approximate distance from the seismic station to the earthquake epicenter is calculated to be 70 kilometers. However, the given answer choices do not match this distance.

To calculate the distance to the earthquake epicenter using the given seismogram, we need to determine the time difference between the P-wave and S-wave arrivals. Let's assume we have the following information:

P-wave arrival time: tP

S-wave arrival time: tS

Calculate the time difference between the P-wave and S-wave arrivals:

Time Difference = tS - tP

Determine the average wave velocity for P-waves and S-waves in the specific geological region. Let's assume the velocities are:

P-wave velocity: VP

S-wave velocity: VS

Calculate the distance to the epicenter using the formula:

Distance = (Time Difference) * (P-wave velocity)

Note: Since S-waves travel slower than P-waves, we use the P-wave velocity to calculate the distance.

Let's assume the given seismogram provides the following values:

P-wave arrival time: tP = 10 seconds

S-wave arrival time: tS = 30 seconds

P-wave velocity: VP = 5 km/s

Calculate the time difference:

Time Difference = tS - tP

= 30 s - 10 s

= 20 seconds

Assume the P-wave velocity:

P-wave velocity: VP = 5 km/s

Calculate the distance to the epicenter:

Distance = (Time Difference) * (P-wave velocity)

= 20 s * 5 km/s

= 100 km

Therefore, based on the given information, the approximate distance from the seismic station to the earthquake epicenter is 100 kilometers.

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Answer: Airplanes fly because they are able to generate a force called Lift which normally moves the airplane upward.

Explanation:

Answer:

The total mechanical energy of a simple harmonic oscillating system is: a non-zero constant.

In a simple harmonic oscillating system, the total mechanical energy is the sum of kinetic energy and potential energy. When the system passes through the equilibrium point, its kinetic energy is at a maximum, and potential energy is at a minimum.

As the system reaches maximum displacement, its potential energy becomes maximum, and kinetic energy becomes minimum. Throughout the oscillation, the sum of these two energies remains constant, which means the total mechanical energy is a non-zero constant.

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Answer:

D

Explanation:

their octet is complete they don't react with any thing

Argon and krypton have similar properties, and they have a complete octet, which means that they do not react with anyone. Hence, option D is correct.

The phrase "inert gas" is a bit misleading because, in some circumstances, these gases can really be reactive. As a result, these gases are typically referred to as noble gases in the context of chemistry and materials science.

The term "noble" has historically been used in chemistry (and earlier in alchemy) to characterize the resistance of some metals to chemical reaction, and the term "noble gas" denotes the same resistance.

These are the inert gases which are mentioned in the periodic table.

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In the peak of summer, it hasn't rained in a week, and the plants are looking rough, so watering the plants for an hour is a good idea.

However, the next day, you come back to the garden, and the plants look in worse shape than they did previously, as if none of that water made it to the plant. Plants absorb water through their roots. The root system of a plant is responsible for drawing water and nutrients from the soil. A plant's root system must be able to absorb water quickly in order for the plant to grow and thrive. When the soil around the root system is dry, the roots will stop growing and will not be able to absorb water.

It may even start to die. Watering plants during the peak of summer is important because it will help keep the soil moist and prevent the roots from drying out. However, watering a plant too much can be harmful. If a plant is overwatered, the water may not be able to penetrate the soil and reach the roots. Instead, it may just sit on top of the soil, causing the roots to rot and die. This can cause the plant to wilt and die.To summarize, if the soil around the plant is too dry, the roots may not be able to absorb the water you gave them, causing the plant to look worse than before. Conversely, overwatering can also be harmful because the water may not be able to penetrate the soil and reach the roots, causing the roots to rot and die.

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Answer: oxidizes or reduces

Explanation: When you change the number of protons in an atom, you will change the atom from one element to a different element.

Answer: Neap tides

Explanation: Neap tides are tides that have the smallest tidal range, and they occur when the Earth the Moon, and the Sun form a 90o angle. They occur exactly halfway between the spring tides when the Moon is at first or last quarter.

Answer:

sandstone and mudstone

Explanation:

Answer:

propulsion

Explanation:

Answer:

The mechanical advantage of a machine is always less than its velocity ratio.It is because mechanical advantage decreases due to the friction and weight of moving parts of the machine, but the velocity ratio remains constant.

Answer:

because velocity ratio dont depend upon friction whereas in case of mechanical advantage the some of the input work is affected by the friction so the value of velocity ratio is always greator than mechanical advantage.

Answer:

Since gravitational force is inversely proportional to the square of the separation distance between the two interacting objects, more separation distance will result in weaker gravitational forces. So as two objects are separated from each other, the force of gravitational attraction between them also decreases.

For the wood crate to move, the force applied (minimum horizontal force) must be greater than the static friction between the wood crate and the wood floor

Given that Jim wishes to push a 100. N wood crate across a wood floor.

The weight of the wood = 100N

The weight will produce a normal reaction N which is equal in magnitude to the magnitude of the weight. That is,

N = mg = 100N

For the wood crate to move, the force applied must be greater than the static friction between the wood crate and the wood floor.

Static friction = μN

Where μ = static friction.

Therefore, the minimum horizontal force that would be required to start the crate moving depend on the nature of the surface of the wood floor.

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Answer:

d=0.4368 g/cm³

Explanation:

Density of an object is defined as the ratio of its total mass to the mass volume.

So that it is

d= m/V

d= (13.87g) / (31.75cm³)

d= 0.4368g/cm³

The motion that the movement of jasmines arm accurately demonstrate circular motion.

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 The in vivo investigations using a transgenic mouse model have provided important evidence that supports the role of Msx1 as a regulator of bone formation. These findings contribute to our understanding of how bones develop and grow, which has implications for both developmental biology and potential therapeutic interventions for bone-related conditions.

Msx1 is a regulator of bone formation during development and postnatal growth. This means that it plays a role in controlling the process of bone formation, both during the early stages of development and in the growth that occurs after birth.

In vivo investigations, which involve studying the effects of a particular factor in a living organism, have been conducted using a transgenic mouse model. Transgenic mice are mice that have been genetically modified to have specific genes or traits.

These investigations have provided valuable insights into the function of Msx1 in bone formation. They have shown that when Msx1 is present, it acts as a regulator, controlling the process of bone formation. This means that it helps to ensure that bones develop and grow properly.

One example of how Msx1 functions as a regulator is during the early stages of bone development. It helps to determine the shape and structure of the bones, ensuring that they form correctly.

Another example is in postnatal growth, where Msx1 helps to regulate the growth of bones as the organism continues to develop. It ensures that bones grow at the right rate and in the right direction.

Overall, the in vivo investigations using a transgenic mouse model have provided important evidence that supports the role of Msx1 as a regulator of bone formation. These findings contribute to our understanding of how bones develop and grow, which has implications for both developmental biology and potential therapeutic interventions for bone-related conditions.

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Answer:

Explanation:

Let the tension in horizontal rope be T₁ and in the other rope be T₂ which is making angle of 51.3⁰

The vertical component of tension T₂ will balance the weight .

= T₂ cos 51.3 = 2.9 x 9.8

T₂ = 2.9 x 9.8  / cos 51.3

= 28.42 / .625

= 45.47 N

The horizontal component of T₂ will balance T₁

T₂ sin 51.3 = T₁

45.47 sin 51.3 = T₁

T₁ = 35.48 N .

The distance between the central axis and the first dark fringe in the given single-slit diffraction experiment is approximately 4221.75 mm.

The distance between the central axis and the first dark fringe in a single-slit diffraction experiment can be determined using the formula:

y = (λL) / w

where:

y is the distance between the central axis and the first dark fringe,

λ is the wavelength of light,

L is the distance between the slit and the screen,

and w is the width of the slit.

λ = 573 nm

λ= 573 × 10⁻³m

w = 0.312 mm

w = 0.312 × 10⁻³ m

L = 2.30 m

Now, let's calculate the distance between the central axis and the first dark fringe (y):

y = (λL) / w

y = (573 × 10⁻⁹ m) × (2.30 m) / (0.312 × 10⁻³ m)

y  = 4.22175 m

We need to convert this result to millimeters (mm) since the question asks for the answer in that unit:

y = 4.22175 m × 1000 mm/m

y  ≈ 4221.75 mm

Therefore, the distance between the central axis and the first dark fringe is approximately 4221.75 mm.

In conclusion, the distance between the central axis and the first dark fringe in the given single-slit diffraction experiment is approximately 4221.75 mm.

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The statement that best explains why the system looses energy is; the Collison of the molecules of hydrogen with the wall of the can carries off energy to the environment.

We know that energy is defined as the rate of doing work. Now the temperature of a gas is measure of the kinetic energy of the molecules of the body. In this case, the temperature of the hydrogen in the cannister has to do with how fast the molecules of the hydrogen are moving.

The higher the temperature, the faster the molecules of the hydrogen move. The lower the temperature, the slower the molecules of the hydrogen moves.

As such, the molecules collide with the walls of the canister, causing the canister molecules to vibrate and carry energy from the canister to the canister’s surroundings.

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The glob would have kinetic energy as it is falling modelled by graph f.

We know that the kinetic energy has to do with the energy that is possessed by a body by virtue of the fact that the body is in motion. We know that kinetic energy is one of the forms of mechanical energy. The term mechanical energy has to do with energy that is at rest or in motion. The energy that is at rest is called the potential energy.

We have been told in the question that a glob of slime is launched or dropped from the edge of a cliff. We have to note that the kinetic energy of the object is going to increase as it is falling to the ground. It then follows that the glob would have its maximum kinetic energy when the glob must have fallen to the ground.

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The box's momentum when it reaches the bottom of the ramp  is 2.8 kg•m/s down the ramp.

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Announcement 1: Fluid mechanics is a branch of chemistry that involves having a look at fluids:  c) False, True

Fluid mechanics is the branch of physics concerned with the mechanics of fluids and the forces on them. It has programs in an extensive variety of disciplines, such as mechanical, aerospace, civil, chemical, and biomedical engineering, geophysics, oceanography, meteorology, astrophysics, and biology. Fluid mechanics is the look at of the forces of the fluid and the way fluids flow. Fluid mechanics may be divided into parts: fluid statics and fluid dynamics. Fluid statics is the observation of fluids at rest, and fluid dynamics is the study of fluids in motion.

Fluid mechanics is the look at fluid behavior (beverages, gases, blood, and plasmas) at relaxation and in movement. Fluid mechanics has a huge variety of packages in mechanical and chemical engineering, organic structures, and in astrophysics.

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The name of the substance is silver based on the specific heat capacity value.

The specific heat capacity of the substance is calculated by applying the following formula for heat capacity.

Q = mcΔθ

where;

c = Q / mΔθ

The specific heat capacity of the substance is calculated as;

c = (5875 J ) / ( 500 g x 50 )

c = 0.235 J/kgK

The substance that has the same specific heat capacity calculated above is silver.

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