A rocket is launched from the origin with an acceleration of 20.0 m/s2 in a straight line at an angle of 30.0 degrees above the horizontal. The launch acceleration lasts for 2.00 seconds at which time the fuel is exhausted. The rocket then falls with an acceleration of 9.80 m/s2 downward. What is the time it takes to reach maximum height?

Answer:

3m/s^2

Explanation:

acceleration=velocity/time

acceleration= 30/10=3m/s^2

Here is the completed soil horizon table:

Layer name Horizon name

Organic layer 1. Horizon O

Top soil 2. Horizon A

Sub soil 3. Horizon B

4.Weathered rock particles 4. Horizon C

Bed rock 5. Horizon R

The soil horizon names are:

O horizon: This is the organic layer consisting of accumulating plant litter and decomposing organic matter.

A horizon: This is the top soil consisting of mineral material mixed with organic matter. It has the highest concentration of organic matter.

B horizon: This is the subsoil consisting of predominantly mineral material. It has less organic matter than the A horizon.

C horizon: This consists of weathered bedrock with accumulated mineral material. It contains few organic materials.

R horizon: This is the unweathered bedrock material beneath the soil layers.

So each soil layer is named according to its composition and properties using horizon names from O to R

The wavelength can be directly read off from the graph as the number of crests or trough and that helps me to determine the wave energy since the energy is inversely related to wavelength.

The wave graph clearly shows the wavelength of a wave. The space between two successive wave peaks or troughs is known as the wavelength. It is commonly measured in meters or equivalent units of length and is denoted by the sign (lambda).

The wavelength can be calculated from a wave graph by measuring the separation between two adjacent peaks or troughs.

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Explanation:

The answer is (B). The speed of light is the same for all observers regardless of their motion relative to the light source.

The speed would an observer on Earth measures for the light from the spotlight will be 3×10⁸ m/sec.

Speed is defined as the rate of change of the distance or the height attained. it is a time-based quantity. it is denoted by u for the initial speed while v for the final speed. its si unit is m/sec.

The given data in the problem is;

The speed of light is, \(\rm C =3 \times 10^8\ m/sec\)

All frames of reference have the same speed of light in a vacuum. Therefore the speed would an observer on Earth measures for the light from the spotlight will be 3×10⁸ m/sec.

Hence option B is correct.

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The unit tangent vector t(1) at t = 1 is (8 i + 4 j + 2 k) / (2 √(21)).

To find the unit tangent vector, we need to take the derivative of the position vector r(t) with respect to t, and then normalize the resulting vector.

Given: r(t) = 8t i + 2t² j + 2t k, t = 1

First, let's find the derivative of r(t) with respect to t.

r'(t) = 8 i + (4t) j + 2 k

Now, substitute t = 1 into r'(t) to find the derivative at t = 1.

r'(1) = 8 i + (4 * 1) j + 2 k
      = 8 i + 4 j + 2 k

Next, to find the unit tangent vector t(t), we need to normalize r'(1) by dividing it by its magnitude.

The magnitude of a vector is found using the formula: ||v|| = √(v1² + v2² + v3²)

Let's calculate the magnitude of r'(1):

||r'(1)|| = √((8)² + (4)² + (2)²)
         = √(64 + 16 + 4)
         = √(84)
         = 2 √(21)

Finally, to find the unit tangent vector t(t), we divide r'(1) by its magnitude:

t(1) = r'(1) / ||r'(1)||
    = (8 i + 4 j + 2 k) / (2 √(21))

Therefore, the unit tangent vector t(1) at t = 1 is (8 i + 4 j + 2 k) / (2 √(21)).

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false. According to NEC 378.21, conductors larger than the maximum size permitted by the wireway shall not be installed in the wireway.

This is because conductors that are too large can cause overheating and damage to the wireway, as well as potentially create a fire hazard.According to NEC 378.21, conductors larger than the maximum size permitted by the wireway shall not be installed in the wireway It is important to follow the manufacturer's instructions and guidelines for wireway installation and ensure that the conductors being installed are within the maximum size limits specified. Additionally, it is important to consider the ampacity and temperature ratings of the conductors to ensure they are appropriate for the intended application. Conductors that are too small may also create a hazard by overheating and causing a fire. Therefore, it is essential to choose the appropriate conductor size and follow all applicable codes and standards to ensure safe and reliable electrical installations.

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Answer:Handles of metal cutters are made long.

Explanation:

Answer:

2N₂(g) + 2O₂(g) ----> 2NO(g)

Explanation:

Gaseous nitrogen and gaseous oxygen reacts in a molar volume ratio of 1 : 1 to produce nitrogen (ii) oxide.

In the reaction, two molecules of nitrogen gas combines with two molecules of oxygen gas in the cylinder to form two molecules of nitrogen (ii) oxide. The equation of the reaction is given below:

2N₂(g) + 2O₂(g) ----> 2NO(g)

Nitrogen (ii) oxide is formed naturally during lightning bolts. The heat released the lightning flashes causes the nitrogen and oxygen in air to combine to form nitrogen (ii) oxide. The nitrogen (ii) oxide formed however, quickly reacts with more oxygen to form nitrogen(ii) oxide.

Nitrogen (ii) oxide is a colorless, poisonous gas. It is slightly denser than air and almost insoluble in water. it is also neutral to litmus.

The balanced chemical equation for the reaction between nitrogen and oxygen is:

2N₂(g) + 2O₂(g) —> 4NO(g)

The equation between nitrogen and oxygen can be written as follow:

N₂(g) + O₂(g) —> NO(g)

The above equation can be balance as illustrated below:

There are 2 atoms of O on the left side and 1 atom on the right side. It can be balance by writing 2 before NO as shown below:

N₂(g) + O₂(g) —> 2NO(g)

Multiply the equation by 2, we have:

The equation is balanced!

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The motion of a swing is a periodic motion, that means it takes one period for a back and forth motion, which is constant. Here it is 12s, so it will take 12s for a back and forth motion, no matter the distance. The length of the rope in the given case is 11.8m

What is periodic motion?

The motion of a swing is a periodic motion that goes back and forth. The time it takes to complete one back and forth motion is called the period. In this case, the period of the swing is 12 s, which means it takes 12 s to swing from one side to the other and back again, no matter the distance.

The length of the rope affects the distance the swing travels, but not the period of the motion. This is because the period only depends on the gravitational force acting on the swing and the length of the rope, not on the distance traveled.

To determine the length of the rope, we need to know the distance the swing travels in one back and forth motion. Let's assume that the swing travels a distance of 4 meters from one side to the other. This means that the total distance traveled in one back and forth motion is 8 meters.

The period of the motion is given by the formula T=2π√(L/g), where T is the period, L is the length of the rope, and g is the acceleration due to gravity. We know that T=12 s and g=9.81 m/s². Substituting these values into the formula, we get:

12=2π√(L/9.81)

Squaring both sides and rearranging, we get:

L=(12/π)²×9.81/4

L=11.8 meters (approximately)

Therefore, the length of the rope is approximately 11.8 meters.

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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:

the correct answer is D

Explanation:

Answer:

a heavier mass

Explanation:

Answer:

Tendon

Explanation:

Tendons are a type of connective tissue that attach muscle to bone. Hope this helps! :)

We are unable to directly determine the work performed by the engine because the distance over which the force acts is unknown.

This indicates that the effort expended to increase the car's speed will be equivalent to the change in kinetic energy of the vehicle. Thus, 30 kJ of effort must be performed.

The work W is equal to the force f times the distance d, or W = fd, to mathematically describe this idea.

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Therefore, the mass of ball 2 is approximately 24.7 kg.

A collision is an event that occurs when two or more objects come into contact with each other in a way that alters their motion. In physics, collisions are studied in terms of the conservation of momentum and the conservation of kinetic energy. In an elastic collision, the total kinetic energy of the system is conserved, and the objects bounce off each other without any loss of energy. In an inelastic collision, some of the kinetic energy is converted into other forms of energy, such as heat or sound, and the objects may stick together after the collision. Collisions can be categorized into two types: head-on collisions and oblique collisions. In a head-on collision, the objects approach each other directly from opposite directions, while in an oblique collision, the objects approach each other at an angle. Collisions are an important concept in physics and have applications in fields such as engineering, transportation, and sports. Understanding the principles of collisions can help us design safer cars, improve the performance of athletic equipment, and develop new technologies for space exploration.

Here,

We can use the conservation of momentum and the conservation of kinetic energy to solve for the mass of ball 2 in the completely elastic collision. Using the conservation of momentum:

m1v1i + m2v2i = m1v1f + m2v2f

Substituting the known values:

(6.7 kg)(2.0 m/s) + m2(-5.0 m/s) = (6.7 kg)(-6.18 m/s) + m2(0.83 m/s)

Simplifying and solving for m2:

(13.4 - 33.9) kg·m/s = -44.006 kg·m/s + 0.83 m2

-20.5 kg·m/s = 0.83 m2

m2 = (-20.5 kg·m/s) / (0.83 m/s)

m2 ≈ 24.7 kg

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Answer:

q = 0.384 C

Explanation:

The total charge present at the head can be easily found out by multiplying the charge on a single electron with the total number of electrons present on the head:

\(q = ne\)

where,

q = total charge on head = ?

n = total no. of electrons on the head = 2.4 x 10¹⁸

e = charge on 1 electron = 1.6 x 10⁻¹⁹ C

Therefore,

\(q = (2.4\ x\ 10^{18})(1.6\ x\ 10^{-19}\ C)\)

q = 0.384 C

The output voltage required of a defibrillating device will be 1700 V.

Ohm's law claims that the voltage across a conductor is directly proportional to the current flowing through it.

Given data;

I = 17 mA=17×10⁻³ A

R = 1×10⁵ ohm

Ohm's law claims that the voltage across a conductor is directly proportional to the current flowing through it.

This current-voltage connection may be expressed mathematically as,

The Equation of Ohm's Law

V=IR

V =17×10⁻³ A×  1×10⁵ ohm

V = 17 × 10²

V = 1700 V

Hence,the output voltage required of a defibrillating device will be  1700 V

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Answer:

1. false 2.true 3. true

Explanation:

there was more scientific method and more ways to solve

the hypothesis show the experiment design  

Answer:

Kinetic energy of the body

\(K.E = \frac{1}{2}mv {}^{2}\)

So, K.E∝ v²

If speed of the body is halved, its kinetic energy is reduced by a factor of 4.

Answer:

7.35 m

Explanation:

We can solve with kinematics or with energy.

Using kinematics, given:

v₀ = 12 m/s

v = 0 m/s

a = -9.8 m/s²

Find: Δy

v² = v₀² + 2aΔy

(0 m/s)² = (12 m/s)² + 2 (-9.8 m/s²) Δy

Δy = 7.35 m

Using energy instead:

PE = KE

mgh = ½ mv²

gh = ½ v²

h = v² / (2g)

h = (12 m/s)² / (2 × 9.8 m/s²)

h = 7.35 m

Answer:

0 - 60 mph = 0 - 26.8 m/s = 0 - 96.6 km/h; 0 - 100 km/h = 0 - 27.8 m/s = 0 - 62.1 mph.

Explanation:

Answer:

A lightbulb is connected to an outlet that has a source of electricity. The electrical energy is converted into light energy to allow the bulb to glow.

Explanation: Lightning is a discharge of static electricity. The lightning bolt lights up the sky.

Answer:

Oh, I didn't know if u meant decigram or decagram! So for decagram there would be 10 grams and deci gram is 0.1 grams.  Hope this helps!!

Explanation:

Answer:

Hey there!

There are 10 grams in one decagram.

Let me know if this helps :)

Answer:

  a = -7.29 m / s²

Explanation:

For this exercise we must use Newton's second law,

          F -W = m a

Force is electrical force

         F = k q₁ q₂ / r²

         k q₁ q₂ / r² -mg = m a

indicate that the charge of the two spheres is equal

         q₁ = q₂ = q

         a = (k q² / r² - m g) / m

         a = k q² / m r² - g

Let's reduce the magnitudes to the SI system

        m = 0.19 g (1kg / 1000 g) = 1.9 10⁻⁴ kg

        q1 = q2 = q = -23.0 nC (1C / 10⁹ nC) = -23.0 10⁻⁹ C

        r = 10.0 cm (1m / 100cm) = 0.1000 m

let's calculate

        a = 9 10⁹ (23.0 10⁻⁹)² / (0.1000² 1.9 10⁻⁴) - 9.8

        a = -7.29 m / s²

The negative sign indicates that the direction of this acceleration is downward

Taking into account the Boyle's law, the original pressure of a gas was 2.5 atmospheres and the original volume was 578 mL.

Boyle's law states that the pressure of a gas in a closed container is inversely proportional to the volume of the container, when the temperature is constant. This is because when the volume decreases, the distance that the particles have to travel is less and therefore more shocks occur in each unit of time, that is, the pressure increases.

Mathematically, if the amount of gas and the temperature remain constant, the product of the pressure and the volume always has the same value:

P×V= k

where:

Being an initial state 1 and a final state 2, it is fulfilled:

P₁×V₁= P₂×V₂

In this case, you know:

Replacing in Boyle's law:

2.5 atm ×V₁= 1.7 atm ×850 mL

Solving:

V₁= (1.7 atm ×850 mL)÷ 2.5 atm

V₁= 578 mL

The original volume was 578 mL.

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Answer:

5m/s

Explanation:

M = f/a
M = 20/10

M = 2Kg

If mass is is doubled, (4kg), the acceleration will be one half of its original value if the force applied is the same (20N) .

a = f/m
a = 20/4

a = 5m/s

Yes, you are correct that a ball placed on a table is not an example of Newton's Third Law action-reaction pair because the two forces are being applied to the same object. The normal reaction force from the table on the ball is an example of a contact force.

This contact force is generated because the table and the ball are in contact with each other, and the table is exerting an outward force on the ball. At the same time, the ball is also exerting an inward force on the table, resulting in a normal reaction force from the table.

This is the force which is preventing the ball from falling through the table.

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Answer:

the top with the largest radius because the radius of curvature is inversely proportional to the angular velocity

Explanation:

Angular and linear velocity are related

         v = w r

         w = v / r

Therefore, if the linear velocity of the two is the same, the one with the smaller radius has the higher angular velocity.

When reviewing the answers, the correct one is:

the top with the largest radius because the radius of curvature is inversely proportional to the angular velocity

The top that has a smaller angular velocity is D. the top with the larger radius because the radius of curvature is directly proportional to the angular velocity.

It should be noted that the top that has a higher angular velocity will be the top with the smaller radius because the radius of curvature is inversely proportional to the angular velocity

On the other hand, since the two spinning tops have different radii while both have the same linear instantaneous velocities at their edges, then the top that has a smaller angular velocity is the top with the larger radius because the radius of curvature is directly proportional to the angular velocity.

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