You have two forces, 114.6 N and 70.7 N. What is their resultant (magnitude) if the first acts upward and the second acts downward? What is the direction of the resultant? What is their resultant (magnitude) if they both act downward? What is the direction of this resultant?

With the speed of 40m/s and time of  7 seconds, your acceleration during this time was approximately 5.71 m/s²

Recall that:

acceleration (a) = (final velocity (v) - initial velocity (u)) / time (t)

a = \(\frac{v - u }{t}\)

Given:

Initial velocity (u) = 0 m/s (assuming you start from rest)

Final velocity (v) = 40 m/s

Time (t) = 7 seconds

Substituting the values into the equation:

Acceleration (a) = (40 m/s - 0 m/s) / 7 s

Acceleration (a) = 40 m/s / 7 s

Acceleration (a) = 5.71 m/s²

Therefore, your acceleration during this time was approximately 5.71 m/s²

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Answer: A

Explanation:

A

The Metonic cycle is a 19-year period where lunar months and solar years align, named after Greek astronomer Meton of Athens, and it is significant for calendars combining lunar and solar observations.

The 19-year Metonic cycle describes a period of time that closely aligns lunar months with solar years, allowing the lunar calendar to be synchronized with the solar calendar. The cycle is named after the ancient Greek astronomer Meton of Athens, who first observed this phenomenon in 432 BCE.
The Metonic cycle consists of 19 solar years, which are approximately equal to 235 lunar months. During this cycle, the phases of the Moon will occur on the same dates in the solar calendar about every 19 years. This cycle is important for calendar systems that combine lunar and solar observations, such as the Hebrew and Chinese calendars.

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The ranking of the objects in order of increasing momentum is: Object C, Object A, Object B.

Momentum is defined as the product of an object's mass and its velocity. If three objects have the same kinetic energy, then they must have the same speed, since kinetic energy is directly proportional to the square of an object's speed. However, since the objects have different masses, they will have different momenta. Using the equation p=mv, we can calculate the momentum of each object. Object C has the lowest mass, so it will have the lowest momentum. Object A and B have the same kinetic energy, but object B has four times the mass of object A, which means it will have four times the momentum. Therefore, the ranking of the objects in order of increasing momentum is: Object C, Object A, Object B. It is important to note that the objects' kinetic energy does not affect their momentum rankings, as long as they have the same kinetic energy. However, if the kinetic energy of each object were different, then their momenta would also be different, even if they had the same mass.

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complete question: CE Object A has a mass m, object B has a mass 4m, and object C has a mass m/4. Rank these objects in order of increasing momentum, given that they all have the same kinetic energy. Indicate ties where appropriate.

Answer:

\(\boxed {\boxed {\sf 157.5 \ Joules }}\)

Explanation:

Work is equal to the product of force and distance.

\(W=F*d\)

The box is being pushed with an effort (force) of 45 Newtons and the distance is 3.5 meters.

\(F= 45 \ N \\d= 3.5 \ m\)

Substitute the values into the formula.

\(W= 45 \ N * 3.5 \ m\)

Multiply.

\(W= 157.5 \ N*m\)

\(W= 157.5 \ J\)

157.5 Joules of work are done on the crate.

Answer: D: Tension

Explanation:

Answer:

The gravitational force is greater which the earth exerts on the moon.

Explanation:

Mostly two things affect the gravity between two objects. The mass of the objects, and the distance between the objects. Both options that were provided had the same distance between the objects. But the first option had more gravitational pull because the earth has more mass than the moon.

Pls mark Brainliest with the crown

Answer:

false

Explanation:

false

false

The right answer is false

Given:

• Length of beam = 7 m

• Mass of beam = 50 kg

• Mass of person = 60 kg

• Distance of the person from the left = 3.6 m

Let's find the tensions, T1 and T2.

First make a free body sketch:

Here, the net torque = 0.

To find the tension, T1, we have:

Where:

l = 7 m

mp = 60 kg

g is acceleration due to gravity = 9.8 m/s²

l1 = 3.6 m

mb = 50 kg

Thus, we have:

Therefore, the tension T1 = 530.6 N.

To find the tension T2, we have:

Thererfore the tension T2 = 547.5 N

• ANSWER:

T1 = 530.6 N

T2 = 547.4 N

Answer:

Greenhouse gases include carbon dioxide, methane, nitrous oxide and other gases that accumulate in the atmosphere and create the heat-reflective layer that keeps the Earth at a livable temperature. These gases form the insulation that keeps the planet warm enough to support life.

Answer:

The radius will be "100.31 m". A further solving is given below.

Explanation:

The given values are:

Time,

T = 2 minutes

i.e.,

 = 120 seconds

Speed,

V = 5.25 m/s

As we know

⇒  \(T=\frac{2 \pi R}{V}\)

then,

⇒  \(R=\frac{TV}{2 \pi}\)

On substituting the given values, we get

⇒      \(=\frac{120\times 5.25}{2\times 3.14}\)

⇒      \(=\frac{630}{6.28}\)

⇒      \(=100.31 \ m\)

The resulting motion of the duck is best described by this statement: C. The duck will continue moving in its current direction.

Motion can be defined as a change in the position (location) of an object or physical body such as a duck, with respect to a reference point.

This ultimately implies that, motion only take place due to a change in position (location) of an object with respect to a frame of reference or reference point i.e the stationary position where an object was standing before the effect of an external force.

Given the following data:

Forward force = 20 Newton.

From the data given, we can deduce that the forward force (20 Newton) is greater than the resistive force (15 Newton) and as such the duck will continue to move in the current direction (forward).

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Your question is lacking the necessary answer options, so I will be adding them here:

A. The duck will stop moving.

B. The duck will stop and then start moving again.

C. The duck will continue moving in its current direction.

D. The duck will move in the direction that the stream is flowing.

Answer: Because The spectra provided evidence to explain why the sun's atmosphere is so much hotter than its surface. ... Clear evidence now suggests that the heating mechanism depends on regular, but intermittent explosive bursts of heat, rather than on continuous gradual heating.

Explanation:

Fluid clutches are used on equipment that is subject to frequent stopping.

Fluid couplings are used in various equipment in which the rotational torque must be transferred smoothly and without shock from the motor to the driven machine.

They are characterized by high transmittable torque and power, quick response times, and a good damping effect.

It absorbs and smooths torsional vibrations from the driveshaft, resulting in a longer lifespan of the drive components.

Equipment that is subject to frequent stopping.

For equipment that is subject to frequent stopping, fluid clutches are commonly used.

This is due to the fact that fluid clutches may be started and stopped frequently without causing harm or wear to the machine.

For this reason, fluid clutches are commonly used in machinery that needs a smooth start and stop, which is important to avoid any harm to the machinery.

In addition, fluid clutches are also less likely to slip, making them ideal for continuous running machines.

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Fluid clutches are used on equipment that is subject to frequent stopping. The correct answer is option C.

A fluid clutch is a type of mechanical device that transmits torque and rotational power from one shaft to another via a fluid.

Fluid clutches are used to couple two rotating shafts and control the amount of torque transferred between them.

Fluid clutches are used in many types of industrial machinery, including printing presses, machine tools, and pumps, as well as in cars and other vehicles.

These clutches can handle higher torque and power loads than most other types of clutches, making them well suited for heavy-duty applications.  

They are most commonly used on equipment that is subject to frequent stopping, such as industrial machines and vehicles, but can also be used on equipment that is subject to other forms of stress, such as misalignment and continuous running. So, the correct answer is option C.

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Answer:

he affirmations the correct ones are: A and D

Explanation:

To find out which expressions are correct, let's calculate the work and power done by each person

the expression for work is W = F and

the expression for power is P = W / t

In this case the work is positive because the beast is in the same direction of displacement.

Ted

        W₁ = 10 1.5

        W₁ = 15 J

        P₁ = 15/1

        P₁ = 15 w

Johnny

the job

         W₂ = 10 1.5

         W₂ = 15 J

the potential

          P₂ = 15/2

          P₂ = 7.5 w

therefore we see that the work of both is the same, but Ted developed twice as much power as Johnny

when resisting the affirmations the correct ones are: A and D

The energy stored in the system is converted to kinetic and thermal energy.

Energy conversion, also termed energy transformation, is the process of changing one form of energy into another. Energy conversion occurs everywhere and every minute of the day. There are numerous forms of energy like thermal energy, electrical energy, nuclear energy, electromagnetic energy, mechanical energy, chemical energy, sound energy, etc.

According to the law of conservation of energy, energy can neither be created nor destroyed but is transformed from one form to another.

The statement that is true about the magnets involved is that; "kinetic energy and velocity are at zero when the magnets are held apart, and both increase rapidly when they are released and move together. Energy stored in the magnetic field decreases."

Therefore, we can state that The energy stored in the system is converted to kinetic and thermal energy.

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Answer:

W = M g = 150 kg * 9.81 m/s^2 = 1470 N

You were only given 3 significant figures in the question.

The weight of the box is 1471.5 N.

In science and engineering, an object's weight is defined as the force of gravity acting on the thing. Weight is sometimes described as a vector quantity in common textbooks, denoting the gravitational force acting on the item.

Given parameters:

Mass of the box, m = 150 kg.

Acceleration due to gravity, g = 9.8 m/s².

Hence, weight of the box is, W = mg = 150 kg × 9.81 m/s² =1471.5 N.

SO, weight of the  box with a mass of 150 kg on Earth is 1471.5 N.

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When the coefficient of kinetic friction is increasing means, the mass of the object is also increasing, so the normal force acting between the contact surfaces will also increase, ultimately increasing the friction.

The ratio obtained by dividing the force required to keep an object moving by the force keeping two sliding surfaces together is known as the coefficient of kinetic friction. The materials used to create the contacting surfaces are particular to this coefficient. The coefficient will be higher on a rougher surface. The ratio of both the friction force to the normal force felt by a body moving on a dry, uneven surface is known as the kinetic friction coefficient or μk.

The force preventing sliding against one another of solid surfaces, fluid layers, and material components is known as friction. There are various kinds of friction, two solid surfaces in touch are opposed to one another's relative lateral motion by dry friction.

Hence, when the coefficient of kinetic friction is increasing means, the mass of the object is also increasing, so the normal force acting between the contact surfaces will also increase, ultimately increasing the friction.

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Answer:

Explanation:

Velocity is the change of rate of displacement with respect to time.

velocity = displacement/time

Given

initial velocity = 15 m/s.

time taken =2 secs

Required

Displacement of the object

From the formula;

Displacement = Velocity * time

Displacement = 15 * 2

Displacement = 30m

Hence the displacement of the object is 30m

A discount rate and the present value of an annuity formula can be used to determine the present value of cash flows from a pipeline that are projected to last indefinitely.

A series of cash flows' present value (PV) is the total of each cash flow's individual present values, discounted back to the present using a discount rate. The formula for calculating the present value of an annuity is the same as the formula for calculating the present value of a cash flow that never ends annuity.

The formula for the present value of an annuity can be used to determine the present value of these cash flows in this scenario if it is assumed that the cash flows from the pipeline would persist indefinitely. It goes like this:

PV = C / r

where C represents a steady cash flow and r represents a discount rate. The discount rate illustrates the temporal value of money by accounting.

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Answer:

renewable are fuels that can be reused while non renewable are fuels that can not be used again

Solar nebula flattening is a natural consequence of collisions between particles in a spinning cloud. therefore, option B is correct.

When a solar nebula collapses under its own gravity, it begins to spin due to the conservation of angular momentum. As the cloud spins, particles within it collide and interact. These collisions cause the cloud to flatten into a disk shape rather than remaining spherical.

Angular momentum plays a crucial role in this process. The initial slight asymmetry or irregularity in the nebula's shape leads to variations in the speeds and directions of the particles' motions. As particles collide and transfer momentum, their motion tends to align along the rotational axis of the cloud, promoting the formation of a flattened disk structure.

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The talk test can be used to assess :  b. lactate threshold. Talk test is an easy way to measure the relative intensity.

The talk test is one way to measure the relative intensity. If you're doing moderate-intensity activity, then you can talk but not sing during the activity. And if you're doing vigorous-intensity activity, then you will not be able to say more than a few words without pausing for a breath.

Researchers at the University of New Hampshire discovered that the results of the talk test in student volunteers were more closely associated with lactate threshold than with ventilatory threshold.

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Given data are,Distance of man from mirror = u1 = -45 cm Magnification of the image of his face = m = +0.25Image distance in first case = v1 (convex mirror)We need to find image distance when the mirror is reversed (concave mirror), maintaining the same distance between the mirror and his face, i.e.,v2 = ?

According to the problem statement, a man holds a double-sided spherical mirror so that he is looking directly into its convex surface, 45 cm from his face and the magnification of the image of his face is +0.25. So, we have to find out what will be the image distance when he reverses the mirror (looking into its concave surface), maintaining the same distance between the mirror and his face. Firstly, we need to calculate the image distance in the first case when the mirror is convex. So, the distance of the man from the mirror is -45 cm.

As given, the magnification of the image of his face is +0.25. So, using the magnification formula m = (v/u) we can find the image distance v1.v1 = m × u1v1 = 0.25 × (-45)v1 = -11.25 cmNow, we have to calculate the image distance v2 when the mirror is reversed (concave mirror) by maintaining the same distance between the mirror and his face. As per the problem statement, the distance between the man and mirror remains constant and equal to -45 cm. Now, we have to find the image distance v2. As the mirror is now concave, the image is real, and hence, v2 is negative.

Therefore, we can write the magnification formula asm = -v2/u1Here, m = +0.25 and u1 = -45 cmSo, the image distance isv2 = m × u1v2 = 0.25 × (-45)v2 = -11.25 cm. Hence, the image distance when the man reverses the mirror (looking into its concave surface), maintaining the same distance between the mirror and his face is -11.25 cm.

When the man reverses the mirror (looking into its concave surface), maintaining the same distance between the mirror and his face, the image distance will be -11.25 cm.

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Collisions could result in gas being stimulated to form new stars. It could also strip gas from galaxies, through tidal interactions, ram pressure events, or (indirectly) by inciting more stellar winds and supernova.

We expect collisions between galaxies to be relatively rare (while star-star collisions are common) because the typical distance between galaxies is much larger in scale to the size of the galaxies themselves. 1. Collisions could result in gas being stimulated to form stars. 2. It could also remove gas from galaxies, through tidal interactions, ram pressure events, or (indirectly) by inciting more stellar winds and supernova. 3. We expect collisions between galaxies to be relatively rare (while star-star collisions are even rarer) because the typical distance between galaxies is large in scale to the size of the galaxies themselves.

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Answer:

Explanation:

1/Rtotal = 1/r1 +1/r2 +1/r3

1/Rtotal = 1/44 + 1/44 + 1/44

1/Rtotal = 3 /44

1/Rtotal = 0.0681818182

1/0.0681818182 = Rtotal

14.66666666666666666 = Rtotal

14 \(\frac{2}{3}\) ohms = Rtotal

Answer:

The volume of water in the graduated cylinder will be equal to the calculated volume of the sphere.

Explanation:

The volume of solid objects can be measured by completely immersing these solids in an overflow faucet filled to brim with a liquid in which the solid does not dissolve. This is known as the displacement method. When water is used, it is known as water displacement method.

In the Volume Lab Sheet, a sphere whose volume has been pre-calculated is immersed in the overflow faucet containing water. The displaced water is collected in a beaker and the volume is obtained using a 50 mL measuring cylinder.

The volume of a  sphere is calculated using the following formula:

Vsphere =  4πr³/ 3

The symbol π represents the number pi, which is about 3.14. The letter r stands for the  radius of the sphere, which is the distance from the center of a sphere to its surface. The  radius is exactly half of the diameter, which is the distance across the sphere through its center.

The volume of the water in the measuring cylinder is found to be equal to the calculated volume of the sphere. This is because an object immersed completely in a liquid displaces a volume of liquid equal to its own volume.

Answer:

Choice d: support force (normal force) on the cat and the weight of the cat are equal in magnitude.

Explanation:

The cat in this question is stationary. As a result, the acceleration of this cat will be zero. By Newton's Second Law of Motion, the net force on this cat will also be zero.

If the floor is level, there will be two forces acting on this cat:

For the net force to be zero, these two forces need to balance each other. For that, they need to have the same magnitude and point in opposite directions. Therefore, the magnitude of the support force (normal force) will be equal to the magnitude of the weight of this cat.