When two forces are acting a body in opposite direction their resultant become 6N and when they are acting in the same direction their resultant becomes 12N. What is the value of two forces?​

Answer:

Explanation:

Total distance covered  = 25 + 15 = 40 m

Total time = 15 + 8 = 23 s

Average speed = total distance covered / total time

= 40 / 23

= 1.74 m / s

Total displacement = 25 - 15 = 10 m

Total time = 15 + 8 = 23 s

Average velocity = total displacement / total time

= 10 / 23

= .434 m / s to the right .

The average speed of the student is approximately 1.74 m/s, and the average velocity is approximately -1.74 m/s (to the left).

Given:

Distance to the right = 25 m

Time taken to the right = 15 s

Distance to the left = 15 m

Time is taken to the left = 8.0 s

To calculate the average speed and average velocity, we need to use the following formulas:

Average speed = Total distance traveled ÷ Total time taken

Average velocity = Displacement ÷ Total time taken

Calculate the total distance traveled:

Total distance = Distance to the right + Distance to the left

Total distance = 25 + 15 = 40 m

Calculate the total time taken:

Total time = Time taken to the right + Time taken to the left

Total time = 15 + 8.0 = 23 s

Calculate the average speed:

Average speed = Total distance ÷ Total time

Average speed = 40 ÷ 23 = 1.74 m/s

Calculate the displacement:

Displacement = Final position - Initial position

Displacement = (-15 ) - 25  = -40 m

Calculate the average velocity:

Average velocity = Displacement ÷ Total time

Average velocity = -40 ÷ 23  ≈ -1.74 m/s

So, the average speed of the student is approximately 1.74 m/s, and the average velocity is approximately -1.74 m/s (to the left). The negative sign in the average velocity indicates that the student's net direction is to the left.

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If A rock is dropped from the top of a tall tower. Half a second later another rock, twice as massive as the first, is dropped. Ignoring air resistance, Then the acceleration is greater for the more massive rock. The correct option is (B).

Acceleration due to gravity (symbolized as "g") is the acceleration experienced by an object due to the gravitational force exerted by a massive body, such as the Earth. Near the surface of the Earth, the acceleration due to gravity is approximately 9.81 meters per second squared (m/s^2).

This means that an object near the Earth's surface will accelerate at a rate of 9.81 m/s^2 due to the force of gravity. For example, if you drop a ball from a height, it will fall faster and faster, increasing its speed by 9.81 m/s^2 every second until it hits the ground. Similarly, if you throw a ball upwards, its speed will decrease by 9.81 m/s^2 every second until it reaches its maximum height and starts to fall back down.

The acceleration due to gravity varies slightly depending on the location and altitude, as well as the mass and distance between the two objects, but for most practical purposes, it is considered constant and equal to 9.81 m/s^2 near the surface of the Earth.

Here in the Question,

The acceleration due to gravity is the same for all objects near the surface of the Earth, regardless of their mass. So,

option (A) "the distance between the rocks increases while both are falling" is not true.

Option (C) "the speed of both rocks is constant while they fall" is also not true because the speed of the rocks increases as they fall due to the acceleration of gravity.

Option (D) "they strike the ground more than half a second apart" is not true because both rocks are dropped from the same height at the same time, so they will hit the ground at the same time.

Option (E) "they strike the ground with the same kinetic energy" is not true because the more massive rock will have a greater kinetic energy when it hits the ground than the less massive rock. This is because kinetic energy is proportional to mass and the velocity squared.

Therefore, the only option that is true is (B) "the acceleration is greater for the more massive rock." This is because, even though the acceleration due to gravity is the same for both rocks, the more massive rock has a greater gravitational force acting on it, which leads to greater acceleration.

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The old farm house had been wrapped in insulation and sided.

refrigerator may be considered to be a heat engine operated in reverse.

The warmed water may become a thermal pollution problem in terms of the receiving body of water.

The normal force between the steel spatula and the dry steel frying pan is 0.5 N.

The frictional force between two surfaces can be calculated using the formula Ff = μk × FN, where Ff is the frictional force, μk is the coefficient of kinetic friction, and FN is the normal force. Rearranging the formula to solve for the normal force gives us FN = Ff / μk.

Plugging in the given values for the frictional force and coefficient of kinetic friction, we get:

FN = 0.150 N / 0.3

FN = 0.5 N

Therefore, the normal force between the steel spatula and the dry steel frying pan is 0.5 N.

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A graph is typically used to depict a change in motion. The link between several variables, such as time and location, time and velocity, or time and acceleration, is visually represented by a graph.

One may see the pattern and trend of the motion over time by putting the data points on a graph. A velocity-time graph, for instance, demonstrates how an object's velocity varies over time, whereas a position-time graph demonstrates how an object's location changes with regard to time.

These graphs give us a visual picture of an object's dynamics and allow us to analyse any acceleration, deceleration, or other changes in motion.

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A sound wave is a type of mechanical wave that is created by the vibration or disturbance of particles in a medium, usually air. Sound waves are characterized by their frequency, wavelength, amplitude, and speed.

A compression wave, like sound, is a kind of longitudinal wave.
When a wave reflects off a surface, the angle of incidence always equals the angle of reflection.
The wailing change of the pitch that you hear as a locomotive approaches and then recedes from you is called the Doppler effect.

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Solution :

The angular acceleration, \($\alpha$\) is obtained from the equation of the \($\text{Newton's second law}$\) of rotational motion,

Thus,

\($\tau = F \times d$\)

or \($\tau = I \times \alpha$\)

where \($\tau$\) is torque, F is force, d is moment arm distance, I is the moment of inertia

Thus, \($\alpha=\frac{(F\times d)}{I}$\)

Now if the force and the moment arm distance are constant, then the \(\text{angular acceleration is inversely proportional to the moment of inertia.}\)

That is when, F = d = constant, then  \($\alpha \propto \frac{1}{I}$\) .

Thus, moment of inertia, I is proportional to mass of the bar.

The mass is less for the bar in case (1) in comparison with that with the bar in case (2) due to the holes that is made in the bar.

Therefore, the bar in case (1), has less moment of inertia and a greater angular acceleration.

The correct option is D, The one of statements concerning a convex mirror is true. The picture might be toward the replicate than one produced with the aid of a plane mirror in its vicinity.

A convex mirror, also known as a diverging mirror, is a curved mirror that bulges outward. Unlike a concave mirror, which curves inward and can focus light to create real images, a convex mirror reflects light outwards and cannot create real images.

Convex mirrors are commonly used in situations where a wide field of view is required, such as in car side mirrors, security mirrors, and in stores to help prevent theft. The bulging surface of the mirror allows it to reflect a wider angle of light than a flat mirror or concave mirror would, making it useful for surveillance and safety purposes. Due to their unique reflective properties, convex mirrors can also produce virtual images that appear smaller and farther away than the actual object being reflected.

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Complete Question: -

Which one of the following statements concerning a convex mirror is true?

a) Such mirrors are always a portion of a large sphere.

b) The image formed by the mirror is sometimes a real image.

c) The image will be larger than one produced by a plane mirror in its place.

d) The image will be closer to the mirror than one produced by a plane mirror in its place.

e) The image will always be inverted relative to the object.

The fastest average speed is distance divide by time.

The fastest average speed = distance / time

s = d /t

Average speed is calculated by dividing the total distance that something has traveled by the total amount of time it took it to travel that distance.

Average speed measures the average rate of speed over the extent of a trip.

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Answer:the universe will expand forever. there are small ripples in the microwave background, the seeds of galaxies.

Explanation:

Answer:

c

Explanation:

tbh I think it is c because of what the explanation says so

Answer:

D

Explanation:

because i got it right when guessing its d

To determine the sample size necessary for estimating a population proportion within a specified margin of error, the researcher needs to calculate the required sample size using an appropriate formula.

In order to calculate the required sample size for estimating a population proportion, the researcher needs to use the formula: n = (z² * p * (1-p)) / E²Where: n = sample size z = critical value for the confidence level p = estimated population proportion E = margin of error In the given scenario, the researcher wishes to estimate the proportion of adults who have high-speed internet. They need to determine the required sample size based on the level of confidence and the desired margin of error. Once they have calculated the required sample size, they can randomly select individuals from the population and collect data to estimate the population proportion with a specified level of accuracy. By using the appropriate formula, the researcher can ensure that the sample size is adequate for the research question at hand.

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The increase in potential energy of his mother if her mass is 56.0 kg will be 6031.97 J.

The energy that an item has due to its location in a gravitational field is known as gravitational potential energy.

The potential energy increases by 3773 J

PE₂-PE₁=mg(h₂-h₁)

3773 J = 35.0 × 9.81 × (h₂-h₁)

(h₂-h₁) = 10.98

Case 2 ;

ΔPE =?

ΔPE=mg(h₂-h₁)

ΔPE=56.0 × 9.81 ×10.98

ΔPE=6031.97 J.

Hence, the increase in potential energy of his mother if her mass is 56.0 kg will be 6031.97 J.

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During an earthquake, the ground experiences significant stress and movement, which can lead to elastic strain on structures, such as a straight fence.

Elastic strain is the temporary deformation of materials under stress, where the material returns to its original shape once the stress is removed.
In this case, if the straight fence undergoes elastic strain during the earthquake, the fence will respond according to the direction of stress. Therefore, the correct answer is:

A) The fence will bend in the direction of stress.
As the stress is applied to the fence, it will bend or deform in the same direction as the force. However, since the strain is elastic, the fence will return to its original straight shape once the earthquake has subsided and the stress is removed.
It is essential to note that the fence will not bend away from the stress, remains straight, or break due to the elastic nature of the strain. Elastic strain allows the fence to absorb the energy from the earthquake and then release it, preventing permanent deformation or damage.

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Answer:

To find the average speed of the athlete in meters per second, you need to divide the distance traveled by the time taken.

The distance traveled is 1.8 kilometers, which is equal to 1800 meters. The time taken is 1.2 x 103 seconds, or 1200 seconds.

The average speed of the athlete is therefore 1800 meters / 1200 seconds = 1.5 meters/second.

Explanation:MARK BRAINLIEST PLEASE

If the victim were pushed from the building instead of falling off, their trajectory would be altered due to a greater initial velocity, angle of projection, and air resistance. The victim would travel farther horizontally, follow a parabolic path, and experience a more noticeable effect from air resistance, leading to a different landing location compared to simply falling off the building.

In the scenario where a victim is pushed from a building instead of falling off, several factors would change the trajectory, such as the initial velocity, angle of projection, and air resistance.
1. Initial velocity: When pushed, the victim would have an initial velocity greater than if they were simply falling. This means they would start with a higher horizontal speed in addition to the vertical speed caused by gravity.
2. Angle of projection: The angle at which the victim is pushed will also affect their trajectory. If pushed at an angle, the victim's trajectory would follow a parabolic path as they are influenced by both horizontal and vertical forces.
3. Air resistance: The victim's trajectory would also be affected by air resistance, which opposes the motion and slows down their descent. The impact of air resistance will be more noticeable in the pushed scenario due to the higher initial velocity.
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Pair of lab instruments would a student use to measure the density of seawater the a balance and a graduated cylinder.

The volume of the seawater is calculated by a graduated cylinder and the mass is obtained by a balance we can find the density of the sea water.For samples containing solids pouring liquid into the graduated cylinder must be done quickly to avoid loss of solids.

Used when specified by the method, Used for sample volumes and chemical additions, where: Measured volume is greater than 25 mL, and Accuracy within 0.5% is acceptable. If the sample contains large amounts of solids, care must be taken to ensure the contents of the graduated cylinder is mixed during adjustments.

Graduated cylinder should, Have sufficient capacity, Be as close to the desired volume as feasible, Have graduations that allow measurement to the desired volume.

The given question is incomplete, the complete question is

Density is mass per unit of volume. Which pair of lab instruments would a student use to measure the density of seawater?

1. a caliper and

2. a flask

3. a stopwatch and a beaker

4. a balance and a graduated cylinder

5. a meter stick and a temperature probe

Hence, the correct option is 4.

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A student would use a balance and a graduated cylinder as a pair of lab tools to calculate the density of seawater.

We can determine the density of the sea water by using a graduated cylinder to calculate the volume and a balance to get the mass.

Pouring liquid into the graduated cylinder for samples that include solids must be done rapidly to prevent solids loss.

when the method so specifies, Used when the measured volume is higher than 25 mL and an accuracy of 0.5% is acceptable for chemical additions and sample quantities. Care must be taken to ensure that the contents of the graduated cylinder are mixed during adjustments if the sample contains significant amounts of solids.

Graduated cylinders have enough capacity, be as near as you can to the specified volume, have graduations that make it possible to measure the desired volume.

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The combined mass of the cessna plane and the passangers, with a potential energy of 800 J is 0.041 kg.

Mass can be defined as the quantity of matter a body contains.

To calculate the combined mass of the cessna plane and passangers, we use the formula below

Formula:

Where:

Make M the subject of the equation

From the question,

Given:

Substitute these values into equation 2

Hence, the combined mass of the cessna plane and the passangers is 0.041 kg.

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Answer:

Dr. Hawking is best known for his discovery that black holes emit radiation which can be detected by special instrumentation. His discovery has made the detailed study of black holes possible.

Explanation:

Answer: I would stop been shy, so I could be able to say what I think to others.  I would be nicer to others, behave better. I would share more with others.

The change in potential energy of the object is given by the above expression. ΔU = -1.665(x2^2 - x1^2) + 1.1(x2^4 - x1^4)

To calculate the change in potential energy of the object, we need to integrate the force with respect to position.

The potential energy change, ΔU, is given by:

ΔU = -∫Fdx

where F is the force and dx is the infinitesimal displacement.

In this case, the force is given as:

F(x) = -3.33x + 4.4x^3

Substituting this into the equation for potential energy change, we get:

ΔU = -∫(-3.33x + 4.4x^3)dx

Integrating this expression with respect to x, we get:

ΔU = [-1.665x^2 + 1.1x^4] + C

where C is the constant of integration.

To find the change in potential energy between two positions x1 and x2, we need to evaluate the expression for ΔU at these two positions and take the difference:

ΔU = [-1.665x2^2 + 1.1x2^4] - [-1.665x1^2 + 1.1x1^4]

Simplifying this expression, we get:

ΔU = -1.665(x2^2 - x1^2) + 1.1(x2^4 - x1^4)

Therefore, the change in potential energy of the object is given by the above expression.

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Answer:

The law of conservation of mass states that the total energy of an isolated system remains constant over time.

Explanation: Hope it helps you :))))

Have a good day

Answer & explanation:

Answer:

Light energy, Sound energy, and Heat energy

Explanation:

Heat energy is the most easily dissipated form of energy. Light energy is frequently energy seen in combustion, and is a type of wave motion. Sound energy is another type of wave motion caused by the vibration of molecules in the air. Like heat energy, sound is a type of energy that is generally lost.

Using velocity and acceleration, a. To determine the location of the car when its velocity is zero, we must identify the roots (time instances) of the velocity equation, which is the first derivative of the position equation.

The velocity equation is as follows: \(v(t) = (9.60m/s^3) t - (0.600m/s^7)t^7.\)

To find the roots of this equation, we can use numerical techniques like Newton-Raphson or bisection. The velocity equation can also be seen to be a seventh-degree polynomial with up to seven roots. By setting the velocity equation to zero and calculating the root, we can apply a numerical solution or perform a hand calculation to obtain the first root (i.e., the first time the car has zero velocity).

b. The formula for the acceleration equation, which is the second derivative of the position equation, is: \(a(t) = (9.60m/s^2) - (6.00m/s^6)\)\(t^6\)

c. and d. To discover the acceleration at the second time occurrence when the car has zero velocity, find the second root by repeating step a and using the acceleration equation to find the acceleration.

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A charged object can attract an uncharged object made of non-conducting material through the process of electrostatic induction. When a charged object is brought close to an uncharged object, it can polarize the charges within the non-conducting material.

A charged object can attract an uncharged object made of non-conducting material through the process of electrostatic induction. When a charged object is brought close to an uncharged object, it can polarize the charges within the non-conducting material. This means that the charged object can cause the electrons within the uncharged object to shift to one side, creating a temporary separation of charges. This separation of charges creates an electric field that can attract the uncharged object towards the charged object. The attraction between the charged and uncharged objects is a result of the electric field that is created by the polarized charges within the non-conducting material. This phenomenon can be observed in everyday life, such as when a charged balloon is brought close to an uncharged wall, causing the wall to be attracted towards the balloon.

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