Q|C A container in the shape of a cube 10.0cm on each edge contains air (with equivalent molar mass 28.9g /mol ) at atmospheric pressure and temperature 300K . Find(b) the gravitational force exerted on it.

Answer:

I don't know sorry brother/sister

Explanation:

please mark as brilliant

The most important effect in clearing the solar nebula of gas and dust was likely the solar wind.

The solar wind is a stream of charged particles that emanate from the sun's corona and travel through the solar system. As the solar wind moves through the nebula, it exerts a force on the gas and dust, causing it to move away from the sun. This process is known as solar wind sweeping. While impacts by planetesimals and radiation pressure may have played a role in clearing the nebula, the solar wind was likely the primary mechanism responsible for the removal of gas and dust.

Additionally, the sun's magnetic field may have played a role in shaping the nebula and influencing the distribution of gas and dust, but it was not the primary force behind its clearing. The asteroid belt is located outside of the nebula and therefore did not contribute to its clearing.

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The magnitude of the force of gravity acting on the mountaineer is 781 N, thus the correct answer is d. 781 newtons.

The force of gravity acting on an object is given by the equation: F = G * (m1 * m2) / r^2

Where F is the force of gravity, G is the gravitational constant, m1 is the mass of the object, m2 is the mass of the other object, and r is the distance between the two objects.

Given the mass of the mountaineer is 70 kg, the mass of the Earth is 5.98 x 10^24 kg, and the distance between the mountaineer and the center of the Earth is 6.39 x 10^6 meters

F = G * (70 kg * 5.98 x 10^24 kg) / (6.39 x 10^6 m)^2

F = (6.673 x 10^-11 N m^2/kg^2) * (4.18 x 10^29 kg) / (4.08 x 10^12 m^2)

F = (6.673 x 10^-11 N m^2/kg^2) * (4.18 x 10^29 kg) / (4.08 x 10^12 m^2)

F = 781 N

So the magnitude of the force of gravity acting on the mountaineer is 781 N, thus the correct answer is d. 781 newtons.

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The force due to the mass of the object can be calculated as follows:

F = mg where m is the mass of the object and g is the acceleration due to gravity.

Therefore, the net force acting on the mass is given by:

Fnet = kx - mg

where x is the displacement of the spring from its equilibrium position.

Hence, the equation of motion for the mass is:

m(d²x/dt²) = -kx + mg

We can simplify this equation by dividing both sides by m. This gives us:d²x/dt² + (k/m)x = g

The solution to this differential equation is given by:x(t) = A cos(ωt + φ)where A is the amplitude of the motion, ω is the angular frequency, and φ is the phase angle.ω can be calculated as follows:ω = √(k/m)The period T of the motion is given by:

T = 2π/ω

Therefore, the period T of the oscillation is:

T = 2π/√(k/m)

The spring has extended by 14 cm or 0.14 m when the object is at rest.

m = unknownk = unknownx = 0.14 m

We can find k by using the formula for the potential energy stored in the spring:

U = (1/2)kx²

At the equilibrium position, the potential energy is zero. Therefore,

U = (1/2)kx² = 0.5k(0.14)² = 0Solving for k, we get:

k = 25 N/m

Now, we can find the period of the motion:

T = 2π/√(k/m)We know that the object is at rest when the spring has extended by 0.14 m. Therefore, the amplitude of the motion is also 0.14 m.

Hence,ω = √(k/m) = √(25/m)Also,

T = 2π/ω = 2π/√(25/m)

Therefore, the period T of the oscillation is:

T = 2π/√(k/m) = 2π/√(25/m) = 2π/√(m/25) = 0.8√(m/25) s

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Given the production rules below, is the plus operator (+) left-associative, right-associative, or neither a parse tree of it is in the explanation part below.

In the provided production rules, the addition operator (+) is left-associative.

Consider the statement "1 + 2 + 3" to show this.

This sentence's parse tree is as follows:

The addition operator's left-associativity is shown in this parse tree. The operands 1 and 2 are combined by the leftmost plus operator, and the resultant total is merged with the operand 3 by another plus operator. This depicts the assessment of the statement "1 + 2 + 3" from left to right.

If the plus operator were right-associative, the parse tree would be different, with the rightmost plus operator first combining operands 2 and 3, and then combining the resultant sum with operand 1.

Thus, the parse tree is attached below as image.

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Answer:

D. 5.7 m

Explanation:

The acceleration of the car is -8.7 m/s² and the car has an initial speed (u) of 10 m/s. The car said to come to rest, that means that the final velocity (v) of the car is 0 m/s.

To find the distance traveled by the car (s) before complete stop, this equation is being used:

v² = u² + 2as

\(2as=v^2-u^2\\s=\frac{v^2-u^2}{2a}\\ Substituting:\\s=\frac{0-10^2}{2*-8.7}\\ s=\frac{-100}{17.4}\\ s=5.7\ m\)

The car traveled 5.7 m before coming to a complete stop

Answer:

Three stages of falling

There are three stages as an object falls through a fluid:

at the start, the object accelerates downwards due to the force of gravity

as the object's speed increases, frictional forces such as air resistance or drag increase

at terminal velocity, the weight of the object due to gravity is balanced by the frictional forces, and the resultant force is zero

Explanation:

The apple falls approximately 7.07 meters before it hits the ground.

To calculate how far the apple falls, we can use the equation for the distance fallen under the influence of gravity:

Gravity is a fundamental principle of physics which states that all objects in the Universe are attracted to each other through the gravitational force
distance = 0.5 * g * t^{2}
where g is the acceleration due to gravity (approximately 9.81 m/s^{2}) and t is the time it takes for the apple to fall (1.2 s).
Step 1: Square the time (t^{2})
t^{2} = 1.2 * 1.2 = 1.44
Step 2: Multiply 0.5 * g * t^{2}
distance = 0.5 * 9.81 * 1.44
Step 3: Calculate the distance
distance ≈ 7.07 meters

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If we increase the wavelength (λ), fringe width will increase and the interference pattern on the wall will spread out.

The double or two-slit interference is a demonstration that light and matter can display characteristics of both classically defined waves and particles.

It  also displays the fundamentally probabilistic nature of quantum mechanical phenomena.

During a two-slit interference experiment, a beam of light is aimed at a barrier with two vertical slits.

fringe width = λ L / D

where;

Thus, if we increase the wavelength (λ), fringe width will increase and the interference pattern on the wall will spread out.

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Answer:

628 J  

Explanation:

Force of friction x distance = work

force of friction = normal force * coeff

                          =  ( 80 kg * 9.81 m/s^2) * .4 = 313.92 N

3139.2N  * 2 m  = 627.84  J  = ~ 628 J

The mass of the box is approximately 6.8 kg. To calculate the mass of the box, we need to use the formula for work: work = force x distance x cos(theta),.

where theta is the angle between the force and the displacement. In this case, we know that the work done was 100 J and the distance lifted was 1.5 m. We also know that the force required to lift the box is equal to its weight, which can be calculated using the formula weight = mass x gravity, where gravity is approximately 9.8 m/s^2.

So, we can rearrange the formula for work to solve for force: force = work / (distance x cos(theta)). Since the box was lifted vertically, the angle between the force and the displacement is 0 degrees, so cos(theta) = 1.
Therefore, force = 100 J / (1.5 m x 1) = 66.67 N. To find the mass of the box, we can use the formula weight = mass x gravity and plug in the force we just calculated:
weight = mass x gravity
66.67 N = mass x 9.8 m/s^2
mass = 6.80 kg

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Answer:

Would it be starting point?

Explanation:

When you start a sport or something, you may not be good or bad at it. However, as time goes on you are going to improve.

Idk if this helps or not buh yeah

The height of the bleachers when a tennis ball dropped from the top and takes 3 seconds in flight is 45 m.

Height can be defined as the vertical distance between two points.

To calculate the height of the bleachers, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, the height of the bleachers is 45 m.

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Statement:

Mateo moved the teacher's table with 50 N of force for 2 meters.

To find out:

The work done in pushing the table.

Solution:

Answer:

The work done in pushing the table is 100 J.

Hope it helps.

If you have any query, feel free to ask.

The distance from point A to the point at which the patrolman overtakes the car is 2700 meters.

The distance from point A to the point at which the motorcycle patrolman overtakes the car is 2700 meters. Here's a step-by-step breakdown of the calculations:

Step 1:

Distance covered by the car in 2 seconds:

Distance = Speed * Time

Speed = 120 km/hr = (120/3600) m/s = (1/30) m/s

Time = 2 seconds

Distance = (1/30) m/s * 2 s = 2/30 km = (2/30) * 1000 m = 66.67 m

Step 2:

Calculating the time taken by the motorcycle patrolman to reach a speed of 150 km/h:

Using the equation v = u + at

Initial velocity (u) = 0 m/s

Final velocity (v) = 150 km/h = (150000/3600) m/s = (125/3) m/s

Acceleration (a) = 6 m/s^2

(125/3) m/s = 0 m/s + 6 m/s^2 * t

Solving for t:

t = (125/3) / 6 sec = (125/3) * (1/6) sec = 125/18 sec

Step 3:

Calculating the distance covered by the motorcycle patrolman in the first (125/18) seconds:

Using the equation s = ut + (1/2)at^2

Initial velocity (u) = 0 m/s

Acceleration (a) = 6 m/s^2

Time (t) = 125/18 sec

s = 0 * (125/18) + (1/2) * 6 * ((125/18)^2) = 1562.5/9 m

Step 4:

Calculating the time taken by the motorcycle patrolman to overtake the car:

Let the time taken be t sec

Speed of the car = 120 km/hr = (100/3) m/s

Distance covered by the car in time t = (100/3) m/s * t

Distance covered by the motorcycle patrolman in time t = Distance covered by the car in time t + Distance covered by the motorcycle patrolman in the first (125/18) sec

Time taken = (Distance to be covered) / (Speed of the motorcycle patrolman)

= (Distance covered by the motorcycle patrolman in time t - Distance covered by the motorcycle patrolman in the first (125/18) sec) / [(150000/3600) m/s]

= [(100/3) * t + 1562.5/9 - 1562.5/9] / [(150000/3600)] sec

= [(100/3) * t] / [(150000/3600)] sec

= (1/45) * t sec

The two times should be equal, so we can set up the equation:

(100/3) * t + 1562.5/9 = (1/45) * t

Solving for t:

(3200/45) * t + 1562.5/9 = t

[(3200/45) - (1/45)] * t = 1562.5/9

t = (1562.5 * 45) / (9 * 3199) sec

Step 5:

Distance from point A to the point at which the motorcycle patrolman overtakes the car:

Distance = Distance covered by the motorcycle patrolman in the first (125/18) sec + Distance covered by the motorcycle patrolman in time t

Distance = 1562.5

/9 + [(100/3) * t + 1562.5/9 - 1562.5/9] m

= 1562.5/9 + (100/3) * (1562.5 * 45) / (9 * 3199) m

= 1562.5/9 + 10425/3199 m

= [(1562.5 * 3199) + 10425] / 28791 m

= 2700 m

Therefore, the distance from point A to the point at which the motorcycle patrolman overtakes the car is 2700 meters.

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Answer:

The GPE of Mr. Butler and a box of Twinkies is 9016 J and KE of Mr. Butler and a box of Twinkies is 287.5 J

GPE = m g h

GPE = Gravitational potential energy

m = Mass

g = Acceleration due to gravity

h = Height

m = 115 kg

g = 9.8 m / s²

h = 8 m

GPE = 115 * 9.8 * 8

GPE = 9016 J

KE = 1 / 2 mv²

KE = Kinetic energy

v = Velocity

v = 5 m / s

KE = 1 / 2 * 115 * 5

KE = 287.5 J

Therefore,

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The fission of 1 kg of coal does not release any energy because coal does not undergo nuclear fission.

However, the combustion of 1 kg of coal releases approximately 35 MJ (megajoules) of energy based on its heating value. Combustion is a chemical reaction that involves the reaction of coal with oxygen, resulting in the release of thermal energy in the form of heat.

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One statement that is not true is that UV radiation is a type of electromagnetic radiation. It is also a type of ionizing radiation. UV radiation is actually a form of non-ionizing radiation.

UV radiation, or ultraviolet radiation, is a type of electromagnetic radiation that falls between visible light and X-rays on the electromagnetic spectrum. It is often categorized into three types: UVA, UVB, and UVC. Unlike ionizing radiation, such as X-rays and gamma rays, which have enough energy to remove tightly bound electrons from atoms or molecules, UV radiation lacks the necessary energy to ionize atoms or molecules. Instead, it primarily interacts with the outermost electrons of atoms or molecules, leading to chemical reactions and causing biological effects.

UV radiation is commonly associated with sunlight and has various effects on living organisms and materials. It can cause sunburn, premature aging of the skin, and an increased risk of skin cancer. Exposure to excessive UV radiation can also damage the eyes and impair the immune system. It is important to protect oneself from excessive UV exposure by wearing sunscreen, protective clothing, and sunglasses.

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Answer:

60.18 N

Explanation:

Given that:

The force applied on the sled = 100 N

Suppose, the angle between the sled rope and the ground = 53°

The horizontal force which acts  in the horizontal direction can be expressed as:

\(F_x = F \ cos \theta\)

\(F_x = 100 \ cos (53)\)

\(F_x = 60.18 \ N\)

But if the angle between the sled rope is parallel to the ground. Then, we use an angle on a straight line which is = 180°

\(F_x = F \ cos \theta\)

\(F_x = 100 \ cos (180)\)

= 100 × -1

= -100 N

The power output is  0.0975 MW

The efficiency of a fission power plant refers to the percentage of the energy released during nuclear fission that is converted into usable electrical energy. The efficiency of a fission power plant depends on various factors, such as the design of the reactor, the type of fuel used, and the efficiency of the power conversion system.

Efficiency = Power output/ Power input * 100/1

39 = x/0.25 * 100

39/100 * 0.25

= 0.0975 MW

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Answer:

15.1 m/s²

Explanation:

Step 1: Calculate the force exerted by the friction

Friction exerts a force against the direction of the movement. On a horizontal plane, we can calculate the value of that force using the following expression.

Ff = μ × m × g

where,

μ: coefficient of kinetic friction

m: mass of the block

g: gravity

Ff = 0.50 × 10 kg × 9.81 m/s² = 49 N

Step 2: Calculate the resulting force

The horizontal force F and the friction force Ff are vectors that act in opposite directions. We can calculate the resulting force (R) by doing the subtraction.

R = F - Ff = R = 200 N - 49 N = 151 N

Step 3: Calculate the acceleration of the block

We will use Newton's second law of motion.

R = m × a

a = R/m

a = 151 N/10 kg = 15.1 m/s²

Answer:

1. In environmental science, a community refers to a group of interacting species that live together in a particular habitat. An example of a community is a coral reef ecosystem, which includes a variety of species such as fish, algae, and invertebrates. In order to become a member of a community, a species must be able to survive and reproduce in the habitat and interact with other species.

2. A habitat is the physical environment where a particular species lives and obtains its resources, such as food, water, and shelter. Two or more species can inhabit a habitat if they are able to coexist and share resources without competition or conflict. For example, in a freshwater pond, various species of fish, frogs, and insects can coexist if they occupy different niches within the habitat.

3. Species diversity is greatest under conditions of high productivity, stable environmental conditions, and low levels of disturbance. For example, a tropical rainforest with high levels of rainfall and temperature stability will typically have greater species diversity than a desert with harsh and unpredictable environmental conditions.

4. Protocooperation refers to a mutually beneficial relationship between two species that work together, but not as closely as in mutualism. An example is the relationship between bees and flowers, where bees collect nectar from flowers for food and in the process, help pollinate the flowers. Mutualism is a relationship where both species benefit from each other. An example is the relationship between bees and flowers, where bees collect nectar for food, and in the process, transfer pollen from one flower to another, aiding in reproduction. Commensalism refers to a relationship where one species benefits while the other is neither helped nor harmed. An example is the relationship between barnacles and whales, where barnacles attach themselves to the whale's skin and gain protection and access to food, while the whale is not affected. Parasitism refers to a relationship where one species benefits while the other is harmed. An example is the relationship between ticks and deer, where the tick feeds on the deer's blood, causing harm and potentially spreading disease. Tolerance refers to a species' ability to survive and reproduce in the presence of other species. An example is the ability of some plant species to tolerate shade from other plants. Interactions among species influence what exists in a community by affecting population sizes, distribution, and resource availability. Positive interactions, such as mutualism, can promote coexistence and increase species diversity, while negative interactions, such as competition or predation, can limit population sizes and reduce species diversity.

5. Community changes can be caused by both biotic and abiotic factors, such as climate change, natural disasters, and human activities. Primary succession occurs in areas where no soil exists, such as on newly formed volcanic islands or after a glacier retreats. In this process, pioneer species such as lichens and mosses begin to colonize the area, gradually building up soil and creating conditions for other plant species to grow. Secondary succession occurs in areas where soil already exists, such as after a forest fire or clear-cutting. In this process, plant and animal species gradually recolonize the area, with some species growing more quickly than others depending on their adaptations and the availability of resources. An example of primary succession is the colonization of the volcanic island of Surtsey by pioneer species, while an example of secondary succession is the regrowth of a forest after a fire.

Explanation:

A community in environmental science is a group of different species living together and interacting in a specific area. For example, a coral reef ecosystem is a community where corals, fish, algae, and invertebrates coexist. To become a member of a community, a species needs to find a suitable habitat and establish interactions with other species.

A habitat is the specific physical environment where organisms live. It includes both living and non-living factors that affect survival and reproduction. Two or more species can inhabit a habitat when they can coexist and share resources without significant competition. For instance, a forest habitat accommodates various trees, understory plants, birds, mammals, and insects, each occupying different niches.

Species diversity is greatest under conditions of high ecological complexity, such as diverse habitats, moderate environmental disturbance, and a wide range of resources. Biodiversity is higher in tropical rainforests, coral reefs, and diverse ecosystems that provide various niches for species to thrive.

Protocooperation is a mutually beneficial interaction between different species without full dependency. An example is oxpecker birds feeding on ticks from zebras, benefiting from food while the mammals get parasite removal. Mutualism is a symbiotic relationship where both species benefit, like flowering plants providing nectar for bees while bees aid in pollination. Commensalism benefits one species without affecting the other, such as orchids growing on tree branches. Parasitism benefits the parasite at the host's expense, like ticks feeding on mammalian blood. Tolerance is the ability of species to withstand challenging conditions, such as plants tolerating extreme temperatures.

Interactions among species influence community composition, structure, and dynamics. Positive interactions like mutualism and protocooperation enhance diversity, while negative interactions like competition and predation limit certain species. Predation affects population dynamics and distribution of prey, which cascades through the community. The removal of a keystone predator disrupts the balance, leading to increased prey abundance and potential negative impacts on other species.

Community changes can result from natural disturbances, human activities, climate change, and evolutionary processes. Primary succession occurs in lifeless areas like bare rock, starting with pioneer species such as lichens. They modify the environment, enabling the establishment of other species. Secondary succession happens in disturbed areas with remnants of the previous community, beginning with fast-growing plants and eventually restoring a diverse community. Examples include the formation of a new island through volcanic activity (primary succession) and forest regeneration after a fire (secondary succession).

Main answer-

PE=mgh

KE=E-PE

V = (2*g*h)^½

at point A

PE = 10*9.8*50=4900 J

KE = 0 J  ( because the velocity of the body is 0)

V=0

at point B

PE = 10*9.8*35=3430 J

KE = 4900-3430=1470 J

V= ( 2*9.8*15)^ ½

V=17.14 m/s

at point C

PE= 10*9.8*25=2450 J

KE=4900-2450=2450 J

V= (2*9.8*25)^ ½

V=22.135 m/s

at point D

PE=10*9.8*0=0 J

KE=4900-0=4900 J

V=(2*9.8*50)^ ½

V=31.30 m/s

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Answer:

5

Explanation:

Formula for Mass (for this question)

\(mass=\frac{Force}{Acceleration}\)

mass= 1000N/200\(m^{2}\)=5

(pls do correct me if I have any mistakes it would rlly help others!)

The location of the center of mass of this system is (1 m, (3q + 2) / 5 m).

First, we can calculate the total mass of the system by adding up the individual masses:

total mass = 1 kg + 3 kg + 1 kg = 5 kg

Next, we can use the formula for the coordinates of the center of mass:

\(x_cm = (m1x1 + m2x2 + m3x3) / (m1 + m2 + m3) y_cm = (m1y1 + m2y2 + m3y3) / (m1 + m2 + m3)\)
where m1, m2, and m3 are the masses of the objects, and x1, y1, x2, y2, x3, y3 are their respective coordinates.

pluging in the values, we get:

\(x_cm = (1 kg x 0 m + 3 kg x 1 m + 1 kg x 2 m) / (5 kg) = 1 m y_cm = (1 kg x 0 m + 3 kg x q m + 1 kg x 2 m) / (5 kg) = (3q + 2) / 5 m\)

Therefore, the location of the center of mass of this system is (1 m, (3q + 2) / 5 m).

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Answer:

5 KG of ice would have the lowest thermal energy

Answer:

its A; 5 kg of ice

Explanation:

yurrrr

Answer: b

Explanation: just did it