What do you observe when you switch on your light source and hold your largest plastic shopping bag square between the light source and the wall?

A cantilever bridge is a bridge constructed using cantilevers that extend horizontally into space and are supported at only one end.

Difference between corrugation and cantilever are:

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The resistance is 15 ohms.

Also, it's dissipating 960 watts whenever it's turned on. So it's almost as hot as a toaster, and Minh no longer has hands.

Answer:

Explanation:

The cars velocity is 14m/s. That means for every second, the car moves 14m. Now, if the car wants to reach 28m, going 14m/s, it will take 2 seconds for the car to reach 28m.

Electric vehicle have to achieve the same amount of momentum as the rocky is 41.78 m/s.

We are given that,

Mass of mountain = M = 61000kg

velocity = V = 0.5m/s

As momentum is defined as the sum of an object's mass and velocity, it is represented as p=mv, where p stands for momentum, m for mass, and v for velocity.

According to the law of conservation of linear momentum, the starting and final momentum should add up to the same amount. As a result, in this instance, MV=mu, where M and m represent the masses of 61 000 kg and 730 kg, respectively, while v and u are the velocities of the masses.

u = MV/m

Putting the values from the above we get,

u = (61000kg)(0.5m/s)/730kg

u = 41.78 m/s

Therefore, Electric vehicle have to achieve the same amount of momentum as the rocky would be 41.78 m/s.

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Answer:

acceleration: 5.48 m/s²

time taken: 9.3 seconds

Given:

\(\boxed{\sf acceleration = \dfrac{Force}{mass}}\)    \(\boxed{\sf time \ taken = \dfrac{final \ velocity - initial \ velocity}{acceleration} }\)

using the formula's:

answer 1:

\(\sf acceleration = \dfrac{F}{m}\)

\(\sf acceleration = \dfrac{6572 }{1200 }\)

\(\sf acceleration = 5.4766... \ m/s^2\)

\(\sf acceleration = 5.48 \ m/s^2\)             // rounded to nearest hundredth //

answer 2:

\(\sf time \ taken = \dfrac{\Delta v}{a}\)

\(\sf time \ taken = \dfrac{66 - 15}{5.48}\)

\(\sf time \ taken = 9.3122 \ seconds\)

\(\sf time \ taken = 9.3 \ seconds\)           // rounded it to nearest tenth //

Answer:

\(\large\boxed{\sf Time =9.30\ s }\)

\(\large\boxed{\sf Accl^n =5.47\ m/s^2 }\)

Explanation:

Here it is given that a car of mass 1200kg has an initial velocity of 15m/s achieves a velocity of 66m/s . A force of 6572N was applied in order to increase the velocity and we need to find the time taken in doing so .

From Newton's Second Law of Motion ,

\(\sf\qquad\longrightarrow Force = \triangle p\\\\ \)

As momentum (p) = mass × velocity ,

\(\\\sf\qquad\longrightarrow Force = \dfrac{m(v-u)}{t} \\\\ \)

Here ,

• On substituting the respective values ,

\(\sf\qquad\longrightarrow 6572N = \dfrac{1200kg ( 66- 15 )m/s }{t}\\\\ \)

\(\sf\qquad\longrightarrow 6572N = 1200kg \times \dfrac{51}{t} \\\\ \)

\(\sf\qquad\longrightarrow t = \dfrac{1200×51}{6572N } \\\\ \)

\(\sf\qquad\longrightarrow t =\dfrac{61200}{6572}s \\\\ \)

\(\sf\qquad\longrightarrow \pink{\frak{ Time = 9.30\ s }} \)

• For finding acceleration ,

\(\sf\qquad\longrightarrow Force = mass * acceleration \\\\ \)

\(\sf\qquad\longrightarrow accl^n =\dfrac{Force}{mass} \\\\ \)

\(\sf\qquad\longrightarrow accl^n =\dfrac{6572N }{1200kg} \\\\ \)

\(\sf\qquad\longrightarrow \pink{\frak{ acceleration= 5.47\ m/s^2}} \\\\ \)

\(\rule{200}4\)

Answer:

Explanation: We need to find the equivalent of the given imaginary number with 22 power:

Using exponent properties, we can rearrange this as:

Answer:

Explanation:

NEWTON'S FIRST LAW OF MOTION:

a body continues its state of rest or of uniform motion in a straight line provided no net force acts on it. Fnet=0

NEWTON'S SECOND LAW OF MOTION:

when a net force acts on a body it produces acceleration in the body which is directly proportional to the magnitude of the net force and inversely to the mass of the body.F=ma

NEWTON'S THIRD LAW OF MOTION:

to every action there is always an equal but opposite reaction.

Answer:

Newton’s laws of motion can be summarized as follows:

An object will remain at rest, or in a uniform, straight-line motion if moving, unless an external force acts upon it.

Force equals change in momentum per change in time. For an object with constant mass, force equals mass times acceleration.

For every action, there is an equal and opposite reaction.

In Depth:

A rock resting on level ground won’t suddenly start moving unless you push it. This is Newton’s first law, which introduces the principle of inertia. Inertia tells us that objects at rest stay at rest, and objects in motion stay in motion at a constant velocity (speed in one direction). When a force acts on the object, it changes its behavior.

For example, when you push the rock along the ground, you apply an external force that causes the rock to break out of inertia and begin moving. When you throw the rock through the air, the force of gravity acts upon it and slows it down, pulling it back to earth. If you threw that rock in outer space with no external force of gravity acting upon it, the flying rock would travel indefinitely forward at constant velocity because of inertia.

Force (F) equals mass (m) times acceleration (a). An object’s mass is the amount of matter it contains. An object’s acceleration is its change in velocity—whether the object is speeding up or slowing down as it moves.

If this seems complicated, just think about how everyday objects react to force. It’s easier to push a soccer ball a certain distance than it is to push a car that same distance. That’s because the soccer ball has much less mass than the car, so it requires less force to create the same amount of acceleration.

A rocket has to fire its engines forcefully to overcome gravity and propel itself into outer space. The force of gas propelling downwards creates a reaction that pushes the rocket in the opposite direction with equal force. This is Newton’s third law: every action has an equal and opposite reaction.

As a result of Newton’s third law, all forces come in pairs. When you push against solid ground with your foot, the ground doesn’t fly off —it pushes back against you. This law helps us understand how objects with different forces interact.

Intrinsic attributes refer to the inherent characteristics or qualities of an object, concept, or entity. These attributes are essential in defining and understanding the nature of something.

The use of intrinsic attributes can vary depending on the context, but here are a few common applications:

1. Classification and categorization: Intrinsic attributes help in categorizing and classifying objects or entities based on their inherent properties. For example, in a product catalog, intrinsic attributes such as size, color, and material are used to classify items into different categories.

2. Descriptive analysis: Intrinsic attributes analyze and describe objects by detailing their characteristics and features. Product reviews use attributes like performance, durability, and design for comprehensive evaluations.

3. Search and retrieval: Intrinsic attributes aid information retrieval by enabling efficient search and filtering. Attributes like author, title, and genre in a book database facilitate specific book searches.

4. Decision making: Intrinsic attributes are often used as factors in decision-making processes. By considering the intrinsic attributes of various options, individuals or systems can make informed choices. For example, when purchasing a car, attributes such as fuel efficiency, safety features, and price are considered to make a decision.

5. Personalization and customization: Intrinsic attributes personalize experiences by tailoring offerings to individual preferences. E-commerce websites utilize attributes like purchase history and preferences for personalized recommendations. Customization based on intrinsic attributes enhances user satisfaction and engagement.

Overall, the use of intrinsic attributes helps in understanding, organizing, and making informed decisions about objects, concepts, or entities by considering their inherent qualities and characteristics.

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Answer:

centripetal force

Explanation:

because this force always compels the body to move in circle

The sudden cessation of energy generation causes the core to collapse and the star's outer layers to collapse onto the core.

What is core collapse?

Core-collapse supernovae are spectacular explosions that occur at the end of a big star's thermonuclear evolution, giving rise to neutron stars and black holes. They are among the most intense occurrences in the universe, play an important role in the synthesis and distribution of chemical elements, drive the development of new stars, and are closely tied to an enigmatic subclass of gamma-ray bursts. As a result, astro-physicists are keen to learn which stars burst as supernovae, what physical mechanisms produce the explosion, and what observable effects result from these cataclysmic events.

When the explosion wave generated in the optically obscured stellar centre eventually reaches the surface layers of the star, the visual supernova outburst begins.

The fire ceases because iron does not work as a fuel. The sudden cessation of energy output leads the core to collapse and the star's outer layers to collapse onto the core. The infalling layers compress so quickly that they 'bounce' off the iron core at near-lightspeed.

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The object's displacement from the initial moment to t = 6.00 s is approximately -5.386 meters.

To find the displacement of the object from the initial moment to t = 6.00 s, we need to calculate the distance traveled during each phase of its motion: the deceleration phase and the acceleration phase.

Initial velocity (v0) = 1.74 m/s in the +x direction

Acceleration (a) =\(-1.11 m/s^2\) (for the deceleration phase) and \(1.11 m/s^2\)(for the acceleration phase)

Time (t) = 6.00 s

First, let's find the time it takes for the object to come to a momentary stop during the deceleration phase. We can use the equation of motion:

v = v0 + at

0 = 1.74 m/s +\((-1.11 m/s^2)\) * t_stop

Solving for t_stop:

t_stop = 1.74 m/s / \(1.11 m/s^2 = 1.567 s\)

During the deceleration phase, the object travels a distance given by:

d1 = v0 * t_stop + (1/2) * a * \(t_stop^2\)

d1 = 1.74 m/s * 1.567 s + (1/2) *\((-1.11 m/s^2) * (1.567 s)^2\)

d1 = 1.723 m

Next, let's calculate the distance traveled during the acceleration phase, from t_stop to t = 6.00 s. Since the object reverses its direction, the initial velocity for this phase is -1.74 m/s.

During the acceleration phase, the object travels a distance given by:

d2 = v0 * (t - t_stop) + (1/2) * a * \((t - t_stop)^2\)

d2 = (-1.74 m/s) * (6.00 s - 1.567 s) + (1/2) * (\(1.11 m/s^2) * (6.00 s - 1.567 s)^2\)

d2 = -7.109 m

Finally, we can find the total displacement by summing the distances traveled during the two phases:

Total displacement = d1 + d2 = 1.723 m + (-7.109 m) = -5.386 m

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Answer:

This formula is the most common one used. The efficiency is in a %

20%

Explanation:

Efficiency = energy out / energy in * 100 (for a %)

Efficiency = 40 / 200 * 100

Efficiency = 20%

The force that is needed to accelerate the arrow is 49 Newtons.

To determine magnitude of the force needed to give a 0.25 kg arrow an acceleration of 196 m/s², we can use the equation of force:

F = ma

where F is the force, m is the mass, and a is the acceleration.

Given that m = 0.25 kg and a = 196 m/s², we can substitute these values into the equation and solve for F:

F = (0.25 kg)(196 m/s²)

F = 49 N

So the force needed to give a 0.25 kg arrow an acceleration of 196 m/s² is 49 N. This is the correct answer out of the options given.

To arrive at this answer we used Newton's second law of motion, which states that the force acting on an object is equal to the mass of the object multiplied by its acceleration. Thus, we were able to use the equation "F = ma" (where F is force, m is mass and a is acceleration) to solve for the force required to accelerate the arrow at 196 m/s².

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The total resistance of this circuit is 15Ω and the total power of the circuit is 60W.

The power is the ratio of the square of voltage and resistance. The total resistance is obtained from the addition of series and parallel resistance.

From the given,

Total resistance (Requ) = R₁ + R₂

R₁ is a series resistance

R₂ is the parallel resistance

R₂ = 1/15 Ω + 1/10 Ω

   = 10×15 / (15+10)

  = 150 / 25

 = 6Ω

Parallel resistance R₂ = 6Ω

R(equivalent) = R₁ + R₂

                      = 9 + 6

                      = 15Ω

Thus, the total resistance is 15 Ω.

The total power, P = E² / R(equivalent)

E represents the voltage

R(equivalent) is the equivalent resistance

P = 30×30 / 15

  = 60 watts.

Thus, the total power in the circuit is 60 watts.

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Answer:

Explanation:

540

Explanation:

Hooke's law is a law of physics that states that the force needed to extend or compress a spring by some distance scales linearly with respect to that distance—that is, Fₛ = kx, where k is a constant factor characteristic of the spring, and x is small compared to the total possible deformation of the spring.

Answer:

option 3 potential chemical energy

In our solar system, distances are really great. Therefore, astronomers frequently avoid using miles or kilometers when describing the distances to planets, asteroids, comets, or spacecraft.

They substitute astronomical units, or AU, which represent the typical separation of the Earth from the sun. That translates to around 93 million miles, 150 million kilometers, or 8 light-minutes.

It is simpler to visualize relative distances in space when thinking in terms of astronomical units.  An astronomical unit is 92,955,807 miles in exact distance (149,597,871 km).

The orbit of the Earth around the sun is not a complete circle. Consequently, during the year, Earth's distance from the sun varies. Earth is approximately 0.983 AU from the sun when it is at perihelion, which occurs in January.

Therefore, In our solar system, distances are really great. Therefore, astronomers frequently avoid using miles or kilometers when describing the distances to planets, asteroids, comets, or spacecraft.

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All energy transformations in an ecosystem starts with the sun.

In the ecosystem, every living being depends on some kind of energy to survive. There are different types of sources of energy in the world. Like: Solar energy, wind energy, tidal energy, fuel energy.

However sun is the only reason behind every transformation of energy. For example wind energy generates from the movement of the wind. But wind is generated due to the pressure difference of two different placed, and this pressure difference is due to the temperature difference of that places. Which ultimately depends on the sun.

In other example, fuel energy derived from the fossils. Fossils are the decomposition of dead plants and animals in the presence or absence of oxygen. But theses plants and animal needs solar energy for photosynthesis and for their survival. So we can say that the sun is the only reason behind every transformation of energy in the eco system.

Hence the option b is correct.

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Psychology is defined as the study of the brain in order to understand human behaviors.

The psychology science research field is a discipline aimed at understanding human behaviors and emotions by analyzing the functioning of the brain, which is the major organ in the nerve system responsible for modulating these types of functions.

Therefore, with this data, we can see that Psychology is a specific science research field related to understanding human behaviors and feelings by analyzing how the different parts of the brain are associated with this process.

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Answer: Psychology is the organized study of behavior and the mental processes that occur with it

Explanation:

Took the K12 test

Answer:

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Explanation:

hhshdhd sndjsj dbdjd

Answer:

1) 2.388ohms

2) R1 3.36A

R2 1.682A

R3 2.88A

R4 2.16A The current has 5.048A over all

3) Voltage in R1 is 3.36v

Voltage in R4 is 8.63v

Explanation:

1. Each of the resistance R1 and R2 are in parallel in series combination with R3 and R4 so we calculate

R1 and R2 which is 1×2÷(1+2)= 0.6667ohms

R3 and R4 which is 3×4÷( 3+4)= 1.71ohms

so the equivalent resistance is 0.667+ 1.71= *2.377ohms*

2. The overall current = voltage source ÷ total resistance

= 12÷ 2.377= 5.048Amps

so current in every resistor will be

current in 1ohms will be (2÷3)×5.048= 3.36Amps

current in 2ohms will be (1÷3)×5.048= 1.68Amps

current in 3ohms will be (4÷7)×5.048= 2.88amps

current in 4ohms will be (3÷7)× 5.048= 2.16amps

3. voltage in R1 is 0.667ohms × 5.048amps= 3.36v

voltage in R4 is 1.71ohms × 5.048amps= 8.63v

The swimmer will land a distance of 180 * (v_r / 1.4) meters downstream from the starting point, where v_r represents the velocity of the river.

To determine how far downstream the swimmer will land, we can use the concept of relative velocity. Let's consider the swimmer's velocity relative to the river, which is the vector sum of the swimmer's velocity in still water and the velocity of the river.

Given that the swimmer's velocity in still water is 1.4 m/s, we need to determine the velocity of the river. To do this, we'll use the fact that the swimmer swims directly across the river, perpendicular to the current. This means that the swimmer's velocity relative to the river is equal to the velocity of the river itself.

Let's assume the velocity of the river is v_r. Since the swimmer is swimming directly across a 180 m wide river, the time taken to cross can be calculated as t = 180 m / (1.4 m/s). During this time, the river current will push the swimmer downstream by a distance equal to the velocity of the river multiplied by the time taken, i.e., d = v_r * t.

Substituting the known values, we get d = v_r * (180 m / 1.4 m/s). Since the units cancel out, the answer will be in meters.

Therefore, the swimmer will land a distance of 180 * (v_r / 1.4) meters downstream from the starting point, where v_r represents the velocity of the river.

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Sophie is also quite self-centered. Alberto teaches her, but she thinks for herself. She had harsh words for him, her mother, and her friend Joanna. Sophie acts with conviction and thinks things through before doing them, making it tough to criticise her.

Romania has a state boundary with the Republic of Moldova in the north-east, Ukraine in the north, Hungary in the north-west, Serbia in the south-west, and Bulgaria in the south, with a total length of 3,149.9 km and an additional 193.5 km of sea border.

Europe is a peninsula of the Eurasian supercontinent, bounded to the north by the Arctic Ocean, to the west by the Atlantic Ocean, and to the south by the Mediterranean, Black, and Caspian Seas.

Denmark borders Germany on the Jutland peninsula in the north. The Baltic Sea (Ostsee) and North Sea coastlines, respectively, complete the peninsula's northern boundary. Germany borders the Netherlands, Belgium, and Luxembourg to the west, and France to the southwest.

Switzerland is surrounded by France to the west, Germany to the north, Austria and Liechtenstein to the east, and Italy to the south.

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Answer:

At 35°C and 60% relative humidity, air can hold a maximum of approximately 17.68 grams of water vapor per kilogram of air. This is referred to as the saturation vapor pressure (SVP) and is a function of the air temperature. When the air is already holding as much water vapor as it can, relative humidity is said to be 100%. Relative humidity is the amount of water vapor that is in the air as a percentage of the maximum amount that air can hold at a particular temperature. Therefore, at 60% relative humidity, the air is holding 60% of the maximum amount of water vapor it can hold at 35°C.

Explanation:

The work done is 9075 Nm .

Work in physics is the energy that is transferred to or from an item when a force is applied along a displacement. For a constant force acting in the same direction as the motion, the work is simply equal to the product of the force's magnitude and the distance traveled.

Work done = Force × Distance

⇒ Force = Mass × Acceleration

⇒ Work done = Mass × Acceleration × Distance

⇒ work done =  550kg × 1.5m/s2 × 11m

work done = 9075 Nm

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Complete Question -

A 550kg elevator accelerates upward at 1.5m/s2 for the first 11m of its motion.

How much work is done during this part of its motion by the cable that lifts the elevator? Neglect any friction.

Answer:

a species on which other species in an ecosystem largely depend, such that if it were removed the ecosystem would change drastically. An example is a predator-prey relationship. If there was no more prey the predators may began to fall ill and die and if there was no more predators the prey would eventually over populate  

Explanation:

Answer:

B. where tectonic plates meet

Explanation:

Most volcanoes occur near tectonic plate boundaries. For example, a large amount are found on the Ring of Firez connecting several plates.