If velocity of a particle is given by v=10+2t² m/s, the average acceleration between 2 sec and 5 sec is?

Answer:

Impulse-The effect of force acting over time to change the momentum of an object.

momentum-The product of mass of a particle and its velocity.

The statement that correctly describes the direction of conventional current in the circuit is : ( C ) current is directed from A to B to C to D

conventioanl current is simply the flow of protons from the positive terminal of the voltage source ( battery ) to the negative terminal of the battery. Also conventional current is the charge transferred in a given direction per unit time. for a conventional current the charge carrier is irrelevant.

Hence we can conclude that the direction of conventional current in the circuit is : current is directed from A to B to C to D.

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Attached below is the missing part of the question

The velocity of the projectile when it lands is 71.218 m/s.

The resultant velocity of the projectile when it lands is calculated by applying the following formula.

V = √ ( Vx²  + Vy² )

where;

The given parameters include the following;

the vertical velocity of the projectile = 44 m/s

the horizontal velocity of the projectile = 56 m/s

V = √ ( Vx²  + Vy² )

V = √ ( 56²  + 44² )

V = 71.218 m/s

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The density of the liquid can be calculated by dividing the mass of the liquid by its volume.To calculate the density of a liquid, you need to divide its mass by its volume. In this case, the mass of the liquid is given as 49 grams, and the volume is given as 70 cm^3.

Density (in g/cm^3) = Mass (in grams) / Volume (in cm^3)

Substituting the given values:

Density = 49 g / 70 cm^3

Now, divide the mass by the volume to find the density:

Density ≈ 0.7 g/cm^3

So, the density of the liquid is approximately 0.7 grams per cubic centimeter.

Density (in g/cm^3) = Mass (in grams) / Volume (in cm^3)

Substituting the given values, we get:

Density = 49 g / 70 cm^3

Now, divide the mass by the volume to find the density:

Density = 0.7 g/cm^3

So, the density of the liquid is 0.7 grams per cubic centimeter.

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Answer: An elastic collision is a collision in which there is no net loss in kinetic energy in the system as a result of the collision. Both momentum and kinetic energy are conserved quantities in elastic collisions. ... They collide, bouncing off each other with no loss in speed.

Answer:

(2) the work required to move the electron is 4.8 x 10⁻¹⁹ J.

Explanation:

Given;

potential difference, V = 3.00 volts

charge of electron, q = 1.6 x 10⁻¹⁹ C

The work required to move an electron is calculated as;

W = Vq

where;

W is the work done in Joules

Substitute the given values and solve for W;

W = (3.00)(1.6 x 10⁻¹⁹)

W = 4.8 x 10⁻¹⁹ J.

Therefore, the work required to move the electron is 4.8 x 10⁻¹⁹ J.

As charge flows, the chemical energy of the battery is dissipated as the time of charge flow increases.

Electric power is defined as the rate at which electric energy is dissipated.

The power of the current flowing through the circuit is calculated as follows;

P = IV

P = I x IR

P = I²R

where;

The electric energy is given as;

E = Pt

E = I²Rt

Thus, we can conclude that as charge flows, the chemical energy of the battery is dissipated as the time of charge flow increases.

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The answer is 6.

Add 4 then divide 2. You should have 18 after you do that, subtract 10 then multiply 20. You then have 6.

Answer:

maneeee , i just need a couple points so ..

Explanation:

hehee , played yall

Answer:

D, E, and F

Explanation:

Like a gas, plasma lacks a fixed volume and shape. Unlike a gas, plasma can conduct electricity and respond to magnetism. That's because plasma contains charged particles called ions. The particles that make up matter are also constantly moving.

The properties of both a gas and a plasma are:

A gas lacks both a fixed volume and a fixed shape. While certain gases are palpable to humans and can be seen and felt, others are not. The gases oxygen, helium, and air are a few examples. N2, O2, and CO2 are among the gases that make up the Earth's atmosphere.

Both the volume and shape of plasma are illusive. Ionized gases frequently contain plasma, yet plasma differs from a gas in that it has special characteristics. The plasma is electrically conductive because it contains free electrical charges that aren't attached to atoms or ions. A gas can be heated and ionized to create plasma. Stars, lightning, fluorescent lights, and neon signs are a few examples of plasma.

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The combination that equals the rotational work done on a spinning tire is net torque on the tire times the tire's angle of displacement.

The rotational work done on an object is calculated by multiplying the torque applied to the object by the angle through which it rotates. In this case, the spinning tire is subject to a net torque, and it undergoes an angular displacement.

The correct combination is net torque on the tire times the tire's angle of displacement because it follows the formula for calculating rotational work, which is given by:

Work = Torque * Angle of displacement

By multiplying the net torque on the tire by the angle of the tire's displacement, we obtain the rotational work done on the spinning tire.

The rotational work done on a spinning tire is equal to the product of the net torque on the tire and the angle of the tire's displacement. This combination correctly accounts for the torque applied to the tire and the distance it rotates, providing a measure of the work performed in the rotational motion of the tire.

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Answer:

the magnitude will not be equal coz point a us greater than point B

. . .

. . .

. . .

!

.

Your answer is 0.30 seconds

The y-component of the force on the particle at the given position is 120 N.

The electric force on the particle is determined by applying Coulomb's law and work-energy theorem as shown below;

Fd = W

Where;

F = W/d

F = 60/0.5

F = 120 N

Thus, the y-component of the force on the particle at the given position is 120 N.

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Answer: 5184 kJ

Explanation:

Given

Area of cross-section \(A=200\ cm^2\)

thickness of slab \(t=5\ cm\)

thermal conductivity \(k=0.5\ W/m-K\)

temperature difference \(\Delta T=150\ K\)

Heat flow is given by

\(\Rightarrow Q=kA\dfrac{dT}{dx}\\\Rightarrow Q=0.5\times 200\times \dfrac{150}{5}\times 10^{-2}\\\Rightarrow Q=30\ W\ or\ 30\ J/s\)

for 2 days time period, it is

\(t=2\ days\ or\ 2\times 24\times 60\times 60\ s\\t=1,72,800\ s\)

Heat flow in 2 days

\(Q=30\times 172800=5184000=5184\ kJ\)

The spring will stretch 9.3 cm when a 48 N load is suspended from it, provided it doesn't reach its elastic limit.

Hooke's Law states that the force (F) is proportional to the displacement (x) of the spring, with a constant of proportionality called the spring constant (k).The spring constant (k) can be calculated using Hooke's Law: F = kx, where F is the force applied, x is the displacement, and k is the spring constant. In this case, we can solve for k by rearranging the formula: k = F/x.
Substituting the values given, we have:  
k = 36 N / 0.07 m
k = 514.3 N/m
To find out how much the spring will stretch when 48 N is suspended from it, we can use the same formula and solve for x:
x = F/k
x = 48 N / 514.3 N/m
x = 0.093 m
Therefore, the spring will stretch by 9.3 cm when 48 N is suspended from it.

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The value of the mean of all values of d (Hd) is -0.04.

As per data the following temperatures,

Temperature (°F) at 8 AM 98.3

Temperature (°F) at 12 AM 99.1 98.8 99.2 97.1 97.4 97.8 97.2

Temperature (F) at 8 AM 99.3 98.8 97.6 97.7 97.1

Temperature (°F) at 12 AM 99.1 99.2 97.8 972 97.4

Let the temperature at 8 AM be the first sample, and the temperature at 12 AM be the second sample. Then,

d = x₂ - x₁

Now, we need to find the values of d for all five subjects.

Therefore, d is as follows:

d₁ = 99.3 - 99.1

   = 0.2

d₂ = 98.8 - 99.2

    = -0.4

d₃ = 97.6 - 97.8

    = -0.2

d₄ = 97.7 - 97.2

   = 0.5

d₅ = 97.1 - 97.4

    = -0.3

In general, Hd represents the mean of all values of d.

Thus, the value of Hd is:

Hd = (0.2 + -0.4 + -0.2 + 0.5 + -0.3) / 5

     = -0.04

Thus, the value of Hd is -0.04.

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Answer:

7500 Newtons

Explanation:

Mass of the sportscar= 1500 kg

Acceleration of the sportscar= 5m/s^2

Hence, let the Force acting on it be F

\(We\ know\ that,\\Force=Mass*Acceleration\\F=ma\\\\Here,\\F=1500*5\\=7500 kg m/s^2\ or\ 7500\ Newtons\)

An example of a contractile source of motion restriction is the contraction of muscles in the human body.

Muscles in the human body play a crucial role in generating movement and controlling motion. Through the process of contraction, muscles have the ability to restrict or limit motion at specific joints, acting as a contractile source of motion restriction.

When muscles contract, they exert a pulling force on the bones they are connected to, resulting in movement at the joints. This contraction is achieved through the interaction of actin and myosin filaments within the muscle fibers. When a signal from the nervous system triggers muscle activation, calcium ions are released, allowing the actin and myosin filaments to slide past each other. This sliding motion generates force, causing the muscle fibers to shorten and contract.

By selectively contracting specific muscles, it is possible to restrict or limit motion at certain joints. For example, when you contract your bicep muscle, it restricts the motion at the elbow joint, causing the arm to bend. Similarly, when you contract your quadriceps muscles, they restrict the motion at the knee joint, allowing you to extend or straighten your leg.

In summary, the contraction of muscles serves as a contractile source of motion restriction. Through their ability to generate force and control joint movement, muscles play a crucial role in enabling and regulating various motions in the human body.

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Answer:

Pascal's principle states that pressure increases by the same amount throughout an enclosed or confined fluid. Archimedes' principle states that the buoyant force acting on a submerged object is equal to the weight of the volume of fluid displaced by the object.

(a) The velocity of the ball after 7 seconds is approximately 68.6 m/s.

(b) The ball is traveling at a speed of approximately 95.4 m/s when it hits the ground.

To determine the velocity of the ball after 7 seconds and its speed when it hits the ground, we can use the equations of motion under constant acceleration.

(a) The initial velocity of the ball is zero since it is dropped from rest. The acceleration due to gravity is approximately \(9.8 m/s^2\) (assuming no air resistance). Using the equation v = u + at, where v is the final velocity, u is the initial velocity, a is the acceleration, and t is the time, we can calculate the velocity after 7 seconds:

\(v = 0 + (9.8 m/s^2) * 7 s = 68.6 m/s\)

Therefore, the velocity of the ball after 7 seconds is approximately 68.6 m/s.

(b) To find the speed of the ball when it hits the ground, we need to determine the time it takes for the ball to fall from a height of 450 m. We can use the equation \(s = ut + (1/2)at^2\), where s is the displacement, u is the initial velocity, a is the acceleration, and t is the time. Rearranging the equation, we have \(t^2 = (2s) / a\).

\(t^2 = (2 * 450 m) / (9.8 m/s^2) = 91.84 s^2\)

Taking the square root, t ≈ 9.59 s

Now, we can calculate the final velocity using the equation v = u + at:

\(v = 0 + (9.8 m/s^2) * 9.59 s ≈ 94.1 m/s\)

Hence, the ball is traveling at a speed of approximately 94.1 m/s when it hits the ground.

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Answer:

Gas like oxygen, nitrogen etc

Answer:

B is your answer

Explanation:

C, D, and A are true and protons are located inside the nucleus and electrons are located outside the nucleus which means B is your answer.

Answer:

a semi truck

Explanation:

When the molecules of carbon dioxide is heated, it is disintegrated into molecules of carbon monoxide and oxygen atoms.

CO2 → CO + O

This is the basic reaction expected to happen by carbon dioxide molecules are heated. However it may also disintegrate into C2, O2, C, etc.

Since heat is absorbed in this reaction, it is an example of endothermic reaction. In an exothermic reaction heat is released. These are the basic two types of chemical reactions on basis of heat.

Therefore, when the molecules of carbon dioxide is heated, it is disintegrated into molecules of carbon monoxide and oxygen atoms.

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Answer:

A  it is still at the same passe and it is going back down

Explanation:

Answer:

The correct answer to your question is A. The object is moving at a constant, negative, velocity. It is negative because it is moving back towards the origin.

Explanation:

True, it is possible for a fault to have a north-south (N-S) strike and an eastward dip.

Faults can have various orientations and dips depending on the tectonic forces and geological conditions in a particular region. The strike refers to the direction of the fault line on the Earth's surface, while the dip indicates the angle at which the fault plane is inclined from the horizontal. Therefore, a fault can have any combination of strike and dip, including an N-S strike and an eastward dip.

Faults are geological fractures where movement has occurred, and their orientations can vary. A fault with a north-south (N-S) strike means it extends in that direction horizontally. The dip refers to the angle of the fault plane from the horizontal. So, it is possible for a fault to have an N-S strike and an eastward dip.

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The energy required to raise the temperature of the air in a room by 5.0°C is 336 kJ

U = \(c_{p}\) m ΔT

U = Energy

\(c_{p}\) = Specific heat

m = Mass

ΔT = Change in temperature

ρ = Density

V = Volume

ρ = 1000 g / m³ (Dry air )

= 1 J / g K

ΔT = 5 °C

V = 4 * 4 * 3

V = 48 m³

m = ρ V

m = 1000 * 48

m = 48000 g

U = 1 * 48000 * 7

U = 336000 J

U = 336 kJ

Therefore, the energy required to raise the temperature of the air in a room by 5.0°C is 336 kJ

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Answer:

Rocks and pebbles that hit Earth's atmosphere and burn up are ______. ... an object in motion stays in motion unless acted upon by another force ... Kepler's Laws of Motion explain why ______. ... planets closer to the sun travel faster in their orbits than planets that are far away ... comets have long tails ... objects can move.

Explanation:

Kepler's Laws of Motion  explain why planets closer to the sun travel faster in their orbits than planets that are far away from the sun.

According to Kepler's first law the sun is at one of the foci of the planets' elliptical orbits around the sun, . Perihelion, the name for the point at which a planet is closest to the sun, and aphelion, the name for the point at which a planet is farthest from the sun.

According to Kepler's third law, the squares of the revolutionary periods  of the planets is directly proportional to the cubes of their mean distances from the sun.  

Therefore, planets closer to the sun travel faster in their orbits than planets that are far away from the sun. Thus, option A is correct.

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