How to work out Initial volume Boyle’s law

To calculate the number of kilocalories generated when the brakes are used to bring a 1200-kg car to rest from a speed of 95 km/h, we need to use the formula for kinetic energy: KE = 1/2mv^2 where KE is the kinetic energy, m is the mass of the object, and v is the velocity.

To determine how many kilocalories are generated when the brakes are used to bring a 1200-kg car to rest from a speed of 95 km/h, follow these steps:

1. First, convert the speed from km/h to m/s. Multiply by (1000 m/km) / (3600 s/h):
  95 km/h * (1000 m/km) / (3600 s/h) = 26.39 m/s

2. Calculate the initial kinetic energy (KE) of the car using the formula:
  KE = 0.5 * m * v^2
  where m is the mass (1200 kg) and v is the velocity (26.39 m/s)
  KE = 0.5 * 1200 kg * (26.39 m/s)^2 = 420998.46 J (joules)

3. Convert the energy from joules to kilocalories using the conversion factor (1 kcal = 4184 J):
  420998.46 J * (1 kcal/4184 J) = 100.57 kcal

So, approximately 100.57 kilocalories are generated when the brakes are used to bring a 1200-kg car to rest from a speed of 95 km/h.

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Answer:

is: B. why ? u ask.... well u forgot one important factor when ansering that factor being that...... H'ES CRACKED AT FORTNITE MY GUY

i desereve bwainweist... JK LOL give it to the other guy.

The given one is an experiment because it tests a cause and effect relationship. The rate of photosynthesis is determined by measuring the concentration of carbon dioxide on an enclosed transparent chamber.

Photosynthesis is a biochemical process by which green plants synthesis chemical energy with the aid of light energy. The photosynthetic reaction is  the combination of carbon dioxide and water to form oxygen molecule and glucose.

The photosynthetic reaction is given here:

\(\rm 6CO_{2} + 6H_{2}O \rightarrow C_{6}H_{12}O_{6} + 6O_{2}\)

Here, the oxygen gas is the product in the reaction. Hence, increase in the oxygen level will reverse the reaction and thus, rate of photosynthesis decreases.

The rate of photosynthesis is determined by the measurement of concentration of carbon dioxide within the closed transparent chamber in which the plant is placed. Hence, we are testing a cause and effect and it is a scientific experiment. Hence, option A is correct.

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The flaw in the experiment on water recycling is that the student did not see water dripping off the glass plate as expected. To correct this flaw, the student should use a cold glass plate instead of a hot glass plate.

The correct option to the given question is option 4.

When the student holds the hot glass plate above the beaker, the water vapor in the atmosphere will come into contact with the cold surface of the plate and condense, forming water droplets. However, if the glass plate is already hot, it will not be able to cool down the water vapor quickly enough for condensation to occur.

By using a cold glass plate, the temperature difference between the plate and the water vapor will be greater, allowing for faster condensation. This will result in water droplets forming on the glass plate and dripping off, demonstrating the process of water recycling through the atmosphere.

Therefore, the correct method to correct the flaw in this experiment is to use a cold glass plate instead of a hot glass plate. This will enable the student to observe water droplets on the glass plate as expected.

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According to the information, we can infer that the correct sentence is: A mosquito flying with a velocity of 5 m/s (option C).

Momentum is a term that refers to a physical property of moving objects. Momentum is a measure of the amount of motion a moving object has and is related to the mass and velocity of the object.

Based on the above, we can infer that the correct option is correct because the fly would have more momentum than the other objects because its mass is less W

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Answer:

\( \boxed{ \sf{See \: below}}\)

Explanation:

Seismograph is a computerized instrument that measures the intensity , origin and speed of the earthquake.

Hope I helped!

Best regards! :D

~\( \sf{TheAnimeGirl}\)

a. The amplitude of the wave is 0.14 meters.

b. The frequency of oscillation of the wave is 17.7 Hz.

In the given expression, the amplitude of the wave is determined by the coefficient in front of the sine function, which is 0.14. The amplitude represents the maximum displacement of the wave from its equilibrium position.

The frequency of oscillation of the wave is determined by the coefficient of t in the argument of the sine function, which is 17.7. The frequency represents the number of complete oscillations of the wave that occur per unit time, in this case, per second (Hz).

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Answer: wrong (kind of)

Explanation:

for a), the number of hydrogens are not balanced, and the type is a combustion

b is right

To calculate the final thermal energy of gas A and gas B, we need to use the equation q = nCΔT, where q represents the thermal energy, n is the number of moles, C is the molar specific heat capacity, and ΔT is the change in temperature. By substituting the given values into the equation, we can determine the final thermal energy of both gases.

However, the initial temperatures of gas A and gas B are not provided, so we cannot directly compare their initial temperatures. The thermal energy alone cannot determine the temperature, as it depends on factors such as the number of moles and the specific heat capacity of the gas. Therefore, we would need additional information to compare the initial temperatures of gas A and gas B.

To further understand the concept of molar specific heat capacity and its relationship to thermal energy, it is important to study the properties of gases and their behavior when subjected to thermal changes. This knowledge can help in understanding how energy is transferred and how temperature changes affect the thermal energy of a gas.

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Answer:

a is the answer

Explanation:

Answer:

C) 70 N

Explanation:

Don't listen to the person above me lol

Answer:

a) F = (137.4 i ^ + 185 j ^) N

b)    F = 230.2 N  ,  θ = 53.5º

Explanation:

In this exercise we ask to find the net force, for which we will define a coordinate system fix the donkey and use trigonometry to decompose the forces

Jack       F₁ₓ = 63.9 N

Jill          F₂ = 79.1 N with direction 45º to the left

              cos (180 -45) = F₂ₓ / F₂

              sin 135 = \(F_{2y}\) / F₂

              F₂ₓ = F₂ cos 135

              F_{2y} = F₂ sin 135

              F₂ₓ = 79.1 cos 135 = -55.9 N

              F_{2y} = 79.1 sin 135 = 55.9 N

Jane      F₃ = 183 N direction 45th to the right

             cos 45 = F₃ₓ / F3

             sin 45 = F_{3y} / F3

             F₃ₓ = F₃ cos 45 = 183 cos 45

             F_{₃y} = F₃ sin 45 = 183 sin 45

             F₃ₓ = 129.4 N

             F_{3y} = 129.4 N

we add each component of the force

       Fₓ = F₁ₓ + F₂ₓ + F₃ₓ

       Fₓ = 63.9 + (-55.9) + 129.4

       Fₓ = 137.4 N

       F_{y} = F_{2y} + F_{3y}

       F_{2y} = 55.9 + 129.4

       F_{2y} = 185.3 N

we can give the result of the forms

a) F = (137.4 i ^ + 185 j ^) N

b) in the form of module and angle

         F = RA (Fₓ² + F_{y}²)

         F = Ra (137² + 185²)

         F = 230.2 N

         tan θ = F_{y} / Fₓ

         θ = tan⁻¹ F_{y} / Fₓ

        θ = tan⁻¹ (185/137)

        θ = 53.5º

Answer: about 1,100,000,000 to 1,500,000,000 Joules/second

Explanation:

1 MW (megawatt) = 1,000,000.00 J/s (joules per second)

1100(1,000,000) = 1,100,000,000

1500(1,000,000) = 1,500,000,000

Answer:

balanced: a train moving at a constant speed, the moon orbiting the earth at a constant speed, a lamp sitting on a desk, an apple hanging on a tree

unbalanced: a skier coming down a mountain, a car accelerating from the start line, a soccer ball after it was kicked, a parachuter falling to ground

Explanation:

all the balanced ones are either moving at a constant speed or are skill

all the unbalanced ones were disturbed by some sort of force causing them to accelerate, go faster, blah blah blah

A penny dropped from the Empire State Building won't go through a car despite its high velocity. The limited mass and energy may cause minor damage.

If a penny is dropped from the Empire State Building and it hits a car, it is highly unlikely that it would go through the car. While a penny dropped from a significant height can reach a high velocity, it does not have enough mass or energy to penetrate through the structure of a car.

When the penny falls, it gains potential energy due to gravity, which is then converted into kinetic energy as it accelerates downward. However, the small mass of the penny limits its ability to cause significant damage upon impact. The kinetic energy it carries is not enough to overcome the structural integrity of a car's body, which is designed to withstand normal impacts and protect the occupants.

That being said, the impact of a falling penny can still cause minor damage to the car, such as a dent or scratch, depending on the angle and velocity at which it strikes. It's important to note that dropping objects from tall buildings is generally unsafe and should be avoided, as it can pose a risk to people on the ground.

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The wheel rotates through an angle of 2 radians or approximately 114.59 degrees.

To find the angle in radians and degrees through which the wheel rotates, you can follow these steps:

1. Calculate the length of the string unwrapped from the wheel: In this case, you pull the string through a distance of 34 cm.

2. Use the formula for the arc length to find the angle in radians: Arc length (s) = radius (r) × angle (θ). In this case, s = 34 cm and r = 17 cm. Rearrange the formula to solve for the angle: θ = s / r.

3. Plug in the values and calculate the angle in radians: θ = 34 cm / 17 cm = 2 radians.

4. Convert the angle from radians to degrees using the formula: degrees = radians × (180° / π). Plug in the angle in radians: degrees = 2 × (180° / π) ≈ 114.59°.

So, the wheel rotates through an angle of 2 radians or approximately 114.59 degrees.

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Thermal expansion occurs because of a change in temperature to the material. It affects the shape, area, volume and even the density of the material. Thermostats which is present in millions of cars are operated by using the expansion of metal. It is also used in the heat switch on many types of machinery and home appliances. Because of thermal expansion and cold flow of aluminum, standard copper conductor cannot be safely used on aluminum wire.

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Answer:

Net force

Explanation:

Answer: Net Force, The net force is a single force that replaces the effect of the original forces on the particle's motion. Your answer is Net Force.

Answer: If you are pushing a box toward your friend with a force of 20 N, and your friend is pushing the box toward you with a force of 30 N, what will happen to the box? The box will move toward your friend with a force of 50 N.

Explanation:

Answer:

87 km/h

Explanation:

720/90=8 8 Hours

285/95=3 3 hours

720-285=435 436 km left

8-3=5 5 hours left

435/5=87

87 km/H

The ability to see the world in three dimensions is called depth perception. It is the visual ability to perceive the relative distance of objects in space and to see them in three dimensions.

Depth perception is an important aspect of vision that allows us to accurately judge distances, perceive spatial relationships, and interact with our environment.

It is the result of the brain processing information from both eyes to create a single, three-dimensional image.

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Static electricity is a type of electric charge that is stationary, or at rest, rather than flowing through a conductor. There are many examples of static electricity in everyday life.

More Examples are:

1. Balloon Rubbing: When you rub a balloon on your hair or a woolen sweater, it builds up a static charge and can stick to walls or attract small pieces of paper.

2. Clothing: Sometimes, when you remove your clothes from the dryer, they may cling together or produce sparks due to the build-up of static electricity caused by friction between the clothes.

3. Walking on carpets: Shuffling your feet on a carpeted floor can generate static electricity. When you touch a metal object afterward, like a doorknob, you might feel a small shock.

4. Lightning: During a thunderstorm, the friction between air particles creates static electricity, which discharges as lightning bolts.

Remember, static electricity occurs when there's an imbalance of electric charges within or on the surface of a material. These examples showcase how static electricity is a part of our daily lives.

This happens because the friction between your feet and the carpet causes an accumulation of electric charge, which is then discharged when you touch the doorknob. Static electricity can also be seen in lightning when a buildup of charge in the atmosphere creates a discharge of electricity.

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Answer:

more massive objects fall faster than less massive objects because they are acted upon by a larger force of gravity

Explanation:

Answer:

3000J

Explanation:

The gravitational energy for any object is given by E=mgh

where m is mass, g is gravitational field strength anf h is height above ground

A mechanic pushes a 3.4 ✕ 103 kg car from rest to a speed of v, doing 5200 J of work in the process. During this time, the car moves 21.0 m. Neglecting friction between car and road, the speed v is approximately 55.37 m/s and the horizontal force exerted on the car is approximately 2.72 ✕ 10^5 N.

To find the speed and the horizontal force exerted on the car, we can use the work-energy theorem. According to the theorem, the work done on an object is equal to the change in its kinetic energy.

Given that the car moves 21.0 m and does 5200 J of work, we can write:

  Work = Change in kinetic energy

  => 5200 J = 1/2 * mass * (v^2 - 0^2)

  where the initial velocity is 0 m/s.

(a) To find the speed v, we rearrange the equation and solve for v:

  v^2 = (2 * Work) / mass

  => v^2 = (2 * 5200 J) / (3.4 ✕ 10^3 kg)

  => v^2 = 3058.82 m^2/s^2

  => v = √3058.82

  => v ≈ 55.37 m/s

Therefore, the speed v is approximately 55.37 m/s.

(b) To find the horizontal force exerted on the car, we can use Newton's second law, which states that force equals mass times acceleration. Since the car starts from rest, its initial velocity is 0 m/s, so the acceleration can be found using the equation:

  v^2 = u^2 + 2 * a * s

  where:

  u is the initial velocity and

  s is the displacement.

Substituting the values, we have:

  55.37^2 = 0 + 2 * a * 21.0

  => a = (55.37^2) / (2 * 21.0)

  => a ≈ 80.03 m/s^2

Finally, we can find the force by multiplying the mass of the car by the acceleration:

  Force = mass * acceleration

  => Force = 3.4 ✕ 10^3 kg * 80.03 m/s^2

  => Force ≈ 2.72 ✕ 10^5 N

Therefore, the horizontal force exerted on the car is approximately 2.72 ✕ 10^5 N.

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From Newton's second law, a constant net force will produce a constant acceleration

A force can be defined as a pull or push. It is a vector quantity and it is measured in Newton.

According to Newton's second law of motion, force is directly proportional to acceleration while mass of the object involved will always constant. That is,

F = ma

Where

When there is a constant net force on a railroad, the car will produce a constant acceleration and the mass of the car will be the same.

Therefore, a constant net force on a railroad car produces constant acceleration.

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The charge located at one of the square's corners is \(Q = (3 \times \sqrt{(a/2)^2 + a^2)} / (8.99 \times 10^9)\).

First, understand the problem.
We are given a square with a charge Q at one of its corners. The electric potential at the center of the square is 3V.

Use the formula for electric potential
The electric potential V at a distance r from a point charge Q is given by the formula:
V = kQ/r
where k is the electrostatic constant (8.99 x 10⁹ Nm²/C²) and r is the distance from the charge to the point where the electric potential is measured.

Calculate the distance from the charge to the center of the square
Let's denote the side length of the square as 'a'. The distance between the charge and the center of the square can be calculated using the Pythagorean theorem, as it forms a right-angled triangle with the side length and half of the side length:
r = √((a/2)² + a²)

Calculate the charge Q
Since we know the electric potential at the center is 3V, we can rearrange the formula for the electric potential to find Q:
Q = Vr/k

Substitute the given values and solve for Q
Plug in the values of V (3V), r (√((a/2)² + a²)), and k (8.99 x 10⁹ Nm²/C²) into the equation and solve for Q:

\(Q = (3 \times \sqrt{(a/2)^2 + a^2)} / (8.99 \times 10^9)\)

This equation gives you the charge Q located at one of the square's corners, considering the electric potential at the exact center of the square is 3V.

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Answer:

yes it is a reactant

Answer:

I would say C

Explanation:

seasons are cause by the tilt in the Earths axis of rotation as it revolves around the sun.