The maximum force that a grocery bag can withstand without ripping is 250 n. Suppose that the bag is filled with 20 kg of groceries and lifted with an acceleration of 5.0 m/s2. Do the groceries stay in the bag?

b. Thermal energy flows out of the water into the air in the freezer

Explanation:

Which statements describe the Mercalli scale? Check all that apply. This scale measures seismic waves based on their size. This scale rates an earthquake according to how much damage it causes. This scale produces a single rating for earthquakes that reach the surface. This scale uses Roman numerals to rank the damage caused by an earthquake. This scale measures the magnitude of an earthquake based on the size of seismic waves.

This scale rates an earthquake according to how much damage it causes.

This scale uses Roman numerals to rank the damage caused by an earthquake.

The intensities of the earthquake can be easily measured with the scale called The Mercalli intensity scale. The Scale called the Richter scale considers the energy of the earthquake. But the Mercalli scale will not consider the energy of the earthquake.

The effects of the earthquake is considered by the Mercalli scale and then the intensity of the earthquake will be calculated based on the effects that is being observed.It is a type of linear measurement. It uses the Roman numerals for the purpose of ranking the damages that are caused by the earthquake.

Answer:

This scale rates an earthquake according to how much damage it causes.

This scale uses Roman numerals to rank the damage caused by an earthquake.

Explanation:

Its CORRECT because I passed the test 100% on e d g e n u i t y 2020

Answer:

a = 0,1[m/s^2]

Explanation:

First we need to indentify the initial data.

And using this kinematic equation we have:

[tex]v = 4[m/s]\\v_{0}= 2 [m/s] \\t = 20[s]\\\\v= v_{0}+a*t\\a=\frac{v-v_{0}}{t} \\a= \frac{4-2}{20} \\a=0.1[m/s^{2}][/tex]

To calculate the velocity of sound in air using the given information, we'll use the formula:

Speed=(distance)/(Time).Therefore, the velocity of sound in air is 332m/s.

To calculate the velocity of sound in air using the given information, we'll use the formula:

Speed=(distance)/(Time)

Given:

Time taken for the echo(t) = 0.2 seconds

Distance between the person and the hill(d) = 33.2 meters

Firstly, recognize that the sound traveled twice the distance (to the hill and back) to create the echo.

So, the actual distance the sound traveled is 2×distance=2×33.2meters=66.4meters.

Next, use the formula for speed:

Speed=(distance)/(Time)

Speed=(66.4m)/(0.2s)

Speed=332m/s

Therefore, the velocity of sound in air is 332m/s.

The answer & explanation for this question is given in the attachment below.

The magnitude of the gravitational force exerted on a rider of mass m during both ascent and descent on an amusement park ride is defined as F = mg, with F being the gravitational force, m the mass of the rider, and g the acceleration due to gravity (~9.81 m/s²).

The gravitational force exerted on a rider with a mass m during both ascent and descent in an amusement park ride is characterized by the same magnitude. This force is given by the expression F = mg, where F is the gravitational force, m is the mass of the rider, and g is the acceleration due to gravity, which is approximately 9.81 m/s² on Earth. Let's break this down:

In both scenarios, note that the actual sensation the rider feels (the 'felt' force) might be different due to the combination of gravitational force and the inertia of the rider's body. This inertia entails a resistance to changes in motion and can lead to what we often describe as the 'thrill' of the ride.

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Answer:

(C) acceleration is a change in velocity.

Explanation :

Acceleration is the rate of change of velocity with time.

Acceleration is the rate at which velocity changes, making option C ('Acceleration is a change in velocity.') the most accurate description of the relationship between velocity and acceleration.

The most accurate description of the relationship between velocity and acceleration is that acceleration is the rate at which velocity changes. Therefore, the correct answer to the question is 'C. Acceleration is a change in velocity.'

Acceleration is a vector quantity, which means it has both magnitude and direction. It can result from a change in speed, a change in direction, or both. Velocity is also a vector that describes the speed of an object in a given direction. When an object's velocity changes, it is accelerating, which can be a result of increasing speed, decreasing speed, or changing direction.

In summary, while velocity is the rate of change of position with time, acceleration is the rate of change of velocity with time.

Friction decreases the kinetic energy which decreases the mechanical energy.

When two object moves one over the other, the resistance that is faced by the object is called as the friction. Any force that restricts the motion of any moving or any object that is sliding is called as friction. A kinetic energy can be considered as a non conservative energy that reduced the mechanical energy of any moving objects.

A friction can be considered as a force that resits motion of an object. When there a movement of two objects one against the other, there will be a conversion of kinetic energy into heat energy. This conversion is caused by the friction. Thus, the kinetic energy reduces the mechanical energy and they will be converted into heat energy.

Friction is a force that opposes motion, transforming mechanical energy into other forms like heat, effectively reducing the system's mechanical energy.

Friction is a force that opposes the movement or motion of an object. In a system, when there is movement, friction comes into play. Mechanical energy is the sum of kinetic and potential energy in a system. As friction acts against movement, it transforms the mechanical energy within the system into other forms of energy, such as heat energy, which reduces the system's mechanical energy. Let's consider a sliding block for example. As the block slides, the friction between the block and the surface generates heat, thus reducing the mechanical energy (kinetic energy) of the block.

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Answer:

2621.25 meters

Explanation:

First, write down what we are given.

Initial velocity = 27.5 m/s

Final velocity = 42.4 m/s

Time = 75 seconds

We need to look at the kinematic equations and determine which one will be best.  In this case, we need an equation with distance.  I am going to use [tex]v_{f}^{2} = v_{i}^{2} +2ad[/tex], but you can also use the other equation, [tex]x = v_{o}t+\frac{1}{2}at^{2}[/tex]

We need to find acceleration.  To find it, we need to use the formula for acceleration: [tex]a = \frac{v_{f}-v_{i}}{t}[/tex].  Plugging in values, [tex]a = \frac{42.4-27.5}{75} = .199\ m/s^{2}[/tex]

Next, plug in what we know into the kinematics equation and solve for distance.  [tex]42.4^{2} = 27.5^{2} + 2(.199)(d)\\d = 2621.25\ meters[/tex]

Final answer:

If a star 100 light-years away begins to expand, it will take 100 years for astronomers on Earth to observe the event, as light from the expansion will take that long to travel the distance to our planet.

Explanation:

If a star 100 light-years away from Earth is beginning to expand into a giant star, astronomers will observe this development after 100 years. This delay is because the light from that event will take 100 years to travel the distance from the star to Earth. As light is the fastest thing in the universe, moving at over 186,000 miles per second, it is the speed at which we receive information from the cosmos. So, even if the star began to expand today, we would not be aware of it until 100 years later - when the light showing the star's expansion arrives here. This concept is similar to observing galaxies through the universe, which allows us to see them as they were when the light left them, essentially looking back in time.

Answer:

the force would not change

Explanation:

the answer is the force would double. i just did the test and got it right!

Answer:16875joules

Explanation:

Mass=m=150kg velocity=v=15m/s

kinetic energy =(m x v^2)/2

Kinetic energy =(150x15^2)/2

Kinetic energy =(150x225)/2

kinetic energy =33750/2

Kinetic energy =16875joules

The student has traveled approximately 56.57 meters east.

In this case, the student has traveled 80 meters in a northeast direction. To determine how far east the student has traveled, we need to find the eastward component of their displacement.

Since the northeast direction can be broken down into equal north and east components, we can use trigonometry to determine the eastward displacement.

By using the sine function, we can find that the eastward displacement is approximately 56.57 meters.

A body that goes a distance and then returns to its starting point has the same beginning and ending points. In this case, the displacement is zero, but the distance travelled is not. It is possible to have zero, negative, or even positive displacements.

Therefore, the average velocity is usually 0 when the overall displacement is zero. To gain a better understanding, keep in mind that a body's displacement is a vector, meaning it depends on its direction. Its precise definition is the object's position change rate in a given direction.

Answer: 130000 J

Explanation: Work is the product of force and distance.

W = F x d

= 5200 N x 25 m

= 130000 J

Answer:

4. 9

Explanation:

For instance, if the speed of an object becomes double, its kinetic energy changes to four times the initial kinetic energy.Similarly, if the speed of the object triples the kinetic energy becomes nine times the initial kinetic energy.

Therefore the answer is 9.

Answer:

C) The gravitational forces of people is so small it is overshadowed by that of Earth.

Answer:

No sand doesn't stay sand forever.

Explanation:

To explain, I will use the equations for kinetic and potential energy:

[tex]PE = mgh\\KE = \frac{1}{2}mv^{2}[/tex]

Potential energy is the potential an object has to move due to gravity.  An object can only have potential energy if 1) gravity is present and 2) it is above the ground at height h.  If gravity = 0 or height = 0, there is no potential energy.  Example:

An object of 5 kg is sitting on a table 5 meters above the ground on earth (g = 9.8 m/s^2).  What is the object's gravitational potential energy?  (answer: 5*5*9.8 = 245 J)

(gravitational potential energy is potential energy)

Kinetic energy is the energy of an object has while in motion.  An object can only have kinetic energy if the object has a non-zero velocity (it is moving and not stationary).  An example:

An object of 5 kg is moving at 5 m/s.  What is the object's kinetic energy?  (answer: 5*5 = 25 J)

Sometimes, an object can have both kinetic and potential energy.  If an object is moving (kinetic energy) and is above the ground (potential), it will have both.  To find the total (mechanical) energy, you can add the kinetic and potential energies together.  An example:

An object of 5 kg is moving on a 5 meter table at 10 m/s.  What is the objects mechanical (total) energy?  (answer: KE = .5(5)(10^2) = 250 J; PE = (5)(9.8)(5) = 245 J; total: 245 + 250 = 495 J)

While the elevator is speeding up from zero to 3.25 m/s, the scale reads something more than 600N. But once the elevator settles into a constant speed ... whatever that is ... the scale settles back to 600N.

Answer:

carbon

Explanation:

A) Force: 0.0528 N

B) Power dissipated: 0.307 W

C) Power delivered: 0.307 W

Explanation:

A)

The  force experienced by a current-carrying wire in a magnetic field is given by

[tex]F=ILB[/tex]

where

I is the current in the wire

L is the length of the wire

B is the strength of the magnetic field

In this problem, we have:

L = 0.451 m

B = 0.751 T

I = 0.156 A

Therefore, the force is

[tex]F=(0.156)(0.451)(0.751)=0.0528 N[/tex]

B)

The rate of energy dissipation in the resistor is the power dissipated in the resistor, and it is given by

[tex]P=I^2R[/tex]

where

I is the current in the resistor

R is the resistance

For the wire in this problem,

I = 0.156 A

[tex]R=12.6\Omega[/tex]

Therefore, the power dissipated is

[tex]P=(0.156)^2(12.6)=0.307 W[/tex]

C)

The mechanical power delivered to the rod is given by

[tex]P=VI[/tex]

where

V is the potential difference across the rod

I is the current in the rod

The potential difference across the rod must be equal to the potential difference across the resistance, which can be  found by using Ohm's law:

[tex]V=RI=(12.6 \Omega)(0.156 A)=1.97 V[/tex]

Therefore, the power delivered to the rod is

[tex]P=(1.97 V)(0.156 A)=0.307 W[/tex]

This power is equal to the power dissipated on the resistor: this is due to the law of conservation of energy, in fact the total energy must remain constant, so here the electric energy is transformed into mechanical energy of motion of the rod.

The amount of solar energy that reaches Earth is changed by Milankovitch cycles.

Explanation:

The Milankovitch cycles affect the amount of solar energy reaching Earth through changes in Earth's orbital shape and axial tilt over thousands of years. The correct option is B) the amount of solar energy that reaches Earth.

The Milankovitch cycles affect the amount of solar energy that reaches Earth. These cycles consist of changes in Earth's orbit and axial tilt over thousands of years. Of the options provided, B) the amount of solar energy that reaches Earth is the aspect that is changed by the Milankovitch cycles. Specifically, eccentricity, which is one of these cycles, alters the shape of Earth's orbital path from more circular to more elliptical over approximately 100,000 years. This affects the proximity of Earth to the sun during various parts of the orbit, thereby influencing the solar radiation the planet receives.

The work done is 140.3 J

Explanation:

Final answer:

The work done by the frictional force as the box moves 11.5 meters is -140.3 joules, indicating the force is opposing the box's motion.

Explanation:

To calculate the work done by friction as a box moves across a floor, we need to use the equation for work, which is work done (W) = force (f) × distance (d) × cos(θ), where θ is the angle between the force and the direction of motion. Since friction always acts opposite to the direction of motion, the angle θ here is 180 degrees, and cos(180°) is -1. Therefore, the work done by the frictional force is negative, indicating that it's in the opposite direction to the displacement of the box.

The frictional force between the box and the floor is given as 12.2 newtons, and the box moves 11.5 meters. Substituting the given values into the work equation gives:

W = f × d × cos(180°) = 12.2 N × 11.5 m × (-1) = -140.3 joules.

The negative sign indicates that the work done by the frictional force is in the opposite direction of the displacement, meaning it resists the motion of the box.

Answer:

Refraction

Explanation:

Refraction is the change in direction of waves that occurs when waves travel from one medium to another. Refraction is always accompanied by a wavelength and speed change. Diffraction is the bending of waves around obstacles and openings.

Waves bend or 'refract' when they move from one medium to another and change speed. This bending is impacted by the properties of the mediums and the angle of the incident wave. A common example is the apparent bending of a stick immersed in water, which we see as a result of light wave refraction.

The bending of waves, whether light, sound, or oceanic, is primarily caused by a phenomenon known as refraction. Refraction occurs when a wave moves from one medium to another, causing a change in speed and resulting in bending of the wave. A typical example of this is the apparent bending of a stick when it is partially immersed in water; what we're seeing is the refraction, or bending, of light waves as they move from water to air.

The extent of bending, or refraction angle, depends on the nature and properties of the transmitting mediums and the incident wave angle. When waves cross the boundary between different mediums at an angle, one side of the wave changes speed before the other, causing the wave to bend towards the medium that slows it down.

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Answer:w=mxg

2x10 =20 N

Explanation:force acting downwards is mg mass into gravitional feild

There is a 33% chance of a large earthquake off the coast of Oregon.

The two main concerns of a large earthquake are Gas fires and Tsunami .

Explanation:

Everytime a large earthquake hits in any other part of the world, We find a small earthquake hitting off the coast of Oregon.

So scientists feel that as United States is prone to Earthquakes, the people have to be prepared for such eventualities.

The main concern for this large earthquake is, that it might lead to gas leakages at homes that can start a gas fire, which might spread. So people have to be careful and check  on any gas leakages.

Such large earthquakes can also lead to tsunami waves. So people have to take precautions and evacuate, if they are near the coastline.

Answer:

2,158N

Explanation:

According to the second newtons law of motion, Force(F) = mass(m) × acceleration (a)... 1

Given mass to be 800kg.

We need to get the acceleration of the body using one of the equations of motion.

v²= u²+2as ... (2)where;

v = final velocity = 50km/hr

u = initial velocity = 20km/hr

a is the acceleration

s is the distance covered by the boat = 30m

Converting 50km/hr and 20km/hr to m/s, this gives us

50km×1000m/1hr×3600s

= 50000/3600

= 13.9m/s

Similarly,

20km/hr = 20000m/3600s

= 5.6m/s

Substituting this values into the equation 2 to get acceleration, we have

13.9²= 5.6²+2a(30)

193.21 = 31.36+60a

60a = 193.21-31.36

60a = 161.85

a = 2.69m/s²

To get the force on the both we substitute the value of mass and acceleration in equation 1

F =ma

F = 800×2.69

F= 2,158N

Therefore the force of friction on the boat is 2,158N

Boyle's Law states that the volume of a gas decreases as pressure increases at constant temperature. This is a fundamental concept in Chemistry.

Boyle's Law, a fundamental principle in Chemistry and Physics, states that at a constant temperature, the volume of a gas is inversely proportional to the pressure applied on it. So, if the pressure on a gas increases and the temperature remains constant, the volume of the gas correspondingly decreases (Option B). In other words, if you squeeze a gas (increasing the pressure), it will take up less space (decreasing the volume), provided the temperature does not change.

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Answer:

float

Explanation:

a less dense material will float when placed in a material that is more dense than itself. The reverse is also true, that a denser material will sink when placed into into a less dense material.

The new kinetic energy of the bowling ball is 108 J,

Answer:

Explanation:

Any object in motion will experience an amount of kinetic energy. So the kinetic energy is directly proportional to the product of mass and square of velocity of the object. In the present case, the bowling ball is experiencing a kinetic energy of 12 J.

So, K.E. = 12 J = [tex]\frac{1}{2}mv^{2}[/tex]

As the ball will be having same mass, so when the velocity is increased three times of old velocity, so new speed will be 3v, where v is the old speed. Then the new kinetic energy will be as below:

New kinetic energy = [tex]\frac{1}{2}m(3v)^{2} = \frac{9}{2}mv^{2}[/tex]

Since we know that [tex]\frac{1}{2}mv^{2}[/tex] = 12 J, substitute this in new kinetic energy equation and we get

New kinetic energy = 9 × 12 J = 108 J.

Hence the new kinetic energy of the bowling ball is 108 J, when the new speed is three times the old speed,