Radioactive carbon, or C-14, is used to date fossil remains. When C-14 decays, as seen in the nuclear equation, it produces what nuclide of nitrogen? A) N-7 B) N-13 C) N-14 D) N-15

Answer:

it will cruch you so the piano exerts on you

Explanation:

The Physics related question involves concepts of Newton's Third Law and momentum. When brakes are applied, a force is exerted against the car's motion. The impact differs based on the car's mass, and its initial momentum which is the product of its mass and velocity.

The subject of the question is related to Physics, specifically focusing on the topic of Newton's laws of motion and momentum. To understand the scenario, we should first comprehend that when the brakes are applied to the cars, a force is exerted which slows them down. This relates to Newton's Third Law - for every action, there's an equal and opposite reaction.

Considering the given scenario, when the brakes apply a force of 40 kN on each car, this force works against their forward momentum, slowing them down. The impact of the force will differ based on the mass of each car, with the lighter car likely slowing down faster than the heavier one. This can be calculated if we know the exact measure of force and the braking distance.

Additionally, the momentum of the cars before the brakes are applied could also be calculated using the formula momentum = mass x velocity, which in this case would have different results for each car due its mass difference, despite identical velocities. Overall, the problem illustrates how both the Newton's third law and principles of momentum come into play in everyday physics scenarios like that of braking cars in motion.

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A car slows down from 27.7 m/s to 10.9 m/s in 2.37s.Then the acceleration is  -7.09 m/sec².

Acceleration is the rate at which an object's velocity with respect to time changes. They are vector quantities, accelerations. The direction of the net force acting on an object determines the direction of its acceleration.

An object has positive acceleration if it is accelerating and travelling in the right direction. Positive acceleration was demonstrated in the first example by the speeding car. The acceleration is occurring in the same direction as the car's motion, which is forward and speeding up.

The equation a = v/t denotes acceleration (a), which is the change in velocity (v) over the change in time (t).

The final velocity 'v' =10.9 m/s

The time 't' = 2.37 secs.

Then acceleration = -7.09 m/sec² or, decceleration is 7.09 m/sec².

Thus, the acceleration is  -7.09 m/sec².

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Answer: Lever

Explanation:

A catapult as a machine is a lever (1st class) because the fulcrum is between the Effort applied and the load(object) to be launched. A first class lever machine is a machine that has the fulcrum in between the effort and the load which makes a catapult a first class lever.

The handle of the catapult is where the effort is applied, the fulcrum is the point of contact between the rubber tied to the stick and the stick itself and the load is the object to be launched.

A catapult is a type of lever because it uses a rigid arm that pivots around a fixed point to launch a projectile.

A simple machine known as a lever is made up of a rigid bar or board that pivots around a fixed point, also known as a fulcrum. The fulcrum of a catapult is the location where the weapon's arm is joined to the base.

Potential energy is stored in the system when the catapult's arm is retracted. Potential energy is transformed into kinetic energy when the arm is released, which causes the arm to swing forward and fire the projectile.

Seesaws, scissors, and crowbars are a few examples of machines that utilize the lever concept. The lever enables the application of a little force over a longer distance to produce a bigger force over a shorter distance.

Therefore, a catapult is a type of lever. The correct answer is lever. An example of a lever is a catapult.

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Answer:

It's C

Explanation:

Since E ∝ amplitude2 then as the amplitude is halved the energy is quartered.

Plugging in to check

amplitude2=E

22=4

12=1

Hello!

Data:

T (period) = 4 s

f (frequency) = ? (waves/second)  

Formula:

[tex]f = \dfrac{1}{T}[/tex]

Solving:

[tex]f = \dfrac{1}{T}[/tex]

[tex]f = \dfrac{1}{4}[/tex]

[tex]\boxed{\boxed{f = 0.25\:waves/second}}\end{array}}\qquad\quad\checkmark[/tex]

___________________________

I Hope this helps, greetings ... Dexteright02! =)

La distancia promedio entre la Tierra y el Sol es de aproximadamente 93 millones de millas. En metros, esta distancia es de aproximadamente 1.5*10^11. Se utiliza la notación científica 1.5 × 10¹¹ metros para representar esta distancia de forma más concisa y manejable.

El Sol está, en promedio, a 93 millones de millas de la Tierra. Sabemos que 1 milla equivale a 1.60934 kilómetros y que un kilómetro es igual a 10^3 metros. Por lo tanto, podemos decir que una milla es igual a 1.60934*10^3 metros.

Para convertir la distancia desde la Tierra hasta el Sol a metros, multiplicamos 93,000,000 millas por 1.60934*10^3 metros/milla. Esto da como resultado aproximadamente 1.5*10^11 metros. Así que, en notación científica, la distancia desde la Tierra hasta el Sol es de aproximadamente 1.5 × 10¹¹ metros.

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Answer:

option D is correct. It is a solution.

Explanation:

A solute is a substance that dissolves in a solution. A solvent and one or more solutes make up every solution.

hence, option D is correct. It is a solution.

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An Eagle that has a mass of 4.5 kg is spotted 5 m above a lake. It flies up to its nest in a tree at a height of 25 m.  How much gravitational potential energy did the eagle gain?

This is the original question

Answer:

882 J = PEg = MGH     M = mass in Kg   G = 9.6 m/s     H = height

Height in this case is the displacement (25m - 5m) = 20m

Hope this helps.

Positive psychologists believe that happiness can be increased by various strategies and interventions, including practicing gratitude, engaging in acts of kindness, cultivating positive relationships, finding meaning and purpose in life, setting and achieving goals, and focusing on one's strengths and virtues. Research has shown that these activities and mindsets can enhance happiness and well-being. CBT and positive psychology interventions have also been found to be effective in increasing happiness and improving overall well-being.

Positive psychologists believe that happiness can be increased by various strategies and interventions. These include practicing gratitude, engaging in acts of kindness, cultivating positive relationships, finding meaning and purpose in life, setting and achieving goals, and focusing on one's strengths and virtues.

Research has shown that these activities and mindsets can enhance happiness and well-being. For example, studies conducted by Seligman and Lyubomirsky have demonstrated that practicing gratitude and performing acts of kindness can boost happiness levels.

Furthermore, interventions such as cognitive-behavioral therapy (CBT) and positive psychology interventions (PPIs) have been found to be effective in increasing happiness and improving overall well-being.

Final answer:

Positive psychologists believe that happiness can be increased by cultivating and focusing on positive affect and emotions.

Explanation:

Answer:

answer is quantitive this guy is wrong

Explanation:

did it on usatestprep

If you stop swimming laps to take a count to 10 seconds then, and you counted for 25 beats, then that is 150 beats per minute.

Conversion of units is defined as the process of multiplying or dividing different units and measurements of the same quantity. Conversion is the process of transforming the value of one form to another, such as inches to millimeters or liters to gallons in mathematics. Units are used to calculate length, weight, capacity, temperature, and speed.

Now, according to the question, the best way to solve the question is,

If you paused for ten seconds, simply multiply 25 by six because each minute equals 60 seconds.

When you multiply the 25 beats to 60 seconds, the answer you get is 150 beats per second.

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Answer:A

Explanation:

Answer:

Amplitude

Explanation:

The intensity (or volume) of a sound wave is proportional to the square of the sound wave:

[tex]I\propto A^2[/tex]

where A is the amplitude of the wave.

The amplitude of a sound wave is measured as the maximum displacement of the wave with respect to its equilibrium position.

The intensity is measured in Decibels (dB), which is related to the logarithmic ratio between the power of two different sounds, i.e. the difference in decibels between two sounds is given by

[tex]10 Log (\frac{P_2}{P_1})[/tex]

where P1 and P2 are the power of the two sounds.

Answer:

The answer is A.) 4 minutes

Explanation:

If you look at the graph they started at 15  and when they took a rest it was at 4 mins.

Answer:

B)15 Minutes

The line becomes straight for one min at the fifteen min marker.

Hope this helps

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To find the velocity and acceleration of a particle as functions of time in a given equation of motion, differentiate the equation with respect to time. The velocity function is v = 3t² - 27 and the acceleration function is a = 6t.

Velocity: To find the velocity, differentiate the equation of motion with respect to time which gives v = ds/dt. In this case, v = 3t² - 27.

Acceleration: Similarly, differentiate the velocity equation with respect to time to find acceleration, which results in a = dv/dt. Here, a = 6t.

The highest element in the hierarchical breakdown of the Work Breakdown Structure (WBS) is the project itself. This project is then divided into definable and measurable tasks or subtasks forming a hierarchical structure.

The highest element in the hierarchical breakdown of the Work Breakdown Structure (WBS) is the project itself. WBS is a tool used in project management to divide a project into manageable chunks or portions. It begins with the final deliverable or project at the top level. This is subsequently broken down into definable and measurable tasks or subtasks forming a multi-level structure. A good example could be a software development project. The entire project would be the highest element and might be divided into phases like planning, design, coding, testing, and implementation. Each of these could be further broken down into more specific tasks.

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