You are in a car moving at 50 mph to the right, from the reference frame of the ground. A truck is next to you moving at 30 mph to the right, also from the reference frame of the ground. Which is true from your reference frame of the car?


a. The truck would appear to stand still.This answer is incorrect.

b. The truck would appear to be moving forward.

c. The truck would appear to be moving backward.

Answer:

amounts

Explanation:

every surface has different amounts of friction

hope this helps :) plz brainliest?

Answer:

Amounts of frictions

Explanation:

take for example a football player it is harder to push a  sled

The reason why  we have to place a object into a graduated cylinder to determine its volume is that the meniscus of liquids in plastic graduated cylinders are relatively flat and this can lead to a more accurate reading of the volume of the liquid.

Graduated cylinders with markings every 1 mL make it simple to measure the volume of your liquid sample with a decent amount of accuracy. The liquid's surface inside a graded cylinder should be observed at eye level for the best results; the volume of the sample is shown by the line at the bottom of the liquid's meniscus.

Graduated cylinders are long, thin containers used to measure liquid volume. They are not meant for weighing, heating, stirring, or mixing. Sizes for graduated cylinders typically range from 5 mL to 500 mL. Some even have capacities more than one liter.

Because the meniscus of liquids in plastic graduated cylinders is reasonably flat, plastic graduated cylinders are frequently utilized.

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The laser is fired at a diffraction grating with 800 lines per cm, again 2.0 m from the screen behind it. The distance between the slits in the diffraction grating is 1.25 x 10^(-5) meters.

To determine the distance between the slits in the diffraction grating, we need to use the formula:

d = 1 / N,

where d is the distance between the slits and N is the number of lines per unit length on the grating.

Given that the diffraction grating has 800 lines per cm, we can convert it to lines per meter:

N = 800 lines/cm = 800 lines / (0.01 m) = 80000 lines/m.

Now we can substitute this value into the formula to calculate the distance between the slits:

d = 1 / N = 1 / 80000 lines/m = 1.25 x 10^(-5) m.

Therefore, the distance between the slits in the diffraction grating is approximately 1.25 x 10^(-5) meters.

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Answer:

My teacher said 36m when I asked her

Explanation:

HOPE THIS HELPS!!

After a storm, a hospital may have to rely on backup generators to power some equipment.Energy conversion provided by the generators is mechanical energy to electrical energy.

Energy is the ability to do work (effort). Energy is basically available in nature, everything that is available in nature and contains energy is called an energy source.

, Energy is abstract and difficult to prove but its existence can be felt. Energy cannot be created or destroyed, but can change form (conversion) from one form of energy to another. This is also known as the law of the conservation of energy. This energy needs to be converted so that it can be used according to human needs. For example, the most important source of energy on earth, the sun. Since ancient times, humans have used solar cells from the sun to produce electricity.

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Both are dangerous on their own, but as they float through the air in Southern California's sunny climate, the sun bakes them into a new molecule called ozone, better known as smog.

Smog development and infiltration over Los Angeles. haze and air pollution in the entire community.

Burning sulfur-containing fossil fuels, particularly coal, causes sulfurous smog, also referred to as "London smog," which is characterized by a high concentration of sulfur oxides in the atmosphere.

The two primary substances in automotive exhaust are nitrogen oxides, which are created in scorching internal combustion engines, and hydrocarbons, which are derived from gasoline.

Therefore, Both are dangerous on their own, but as they float through the air in Southern California's sunny climate, the sun bakes them into a new molecule called ozone, better known as smog.

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Answer:

\(x=1,y=\frac{7}{2}\)

Explanation:

Given the following question:

\(5x-2=3\)
\(-5+4y=9\)

To solve a system of equations we must start by solving the first equation for x, and then we substitute the value of x in in the second equation and then solve for y to find the value of both variables.


\(5x-2=3\)
\(-5+4y=9\)
\(-2+2=0\)
\(3+2=5\)
\(5x=5\)
\(5x\div5=x\)
\(5\div5=1\)
\(x=1\)

Substitute and solve the second equation:
\(x=1\)
\(-5+4y=9\)
\(-5+5=0\)
\(9+5=14\)
\(4y=14\)
\(4y\div4=y\)
\(\frac{14}{4} =\frac{7}{2}\)
\(y=\frac{7}{2}\)

Your answers are "x = 1, and y = 7/2."

Hope this helps.

Answer:

Explanation:

To solve this problem, isolate the term of x from one side of the equation.

5x-2=3 and -5+4y=9

First, add by 2 from both sides.

5x-2+2=3+2

Solve.

3+2=5

Rewrite the problem down.

5x=5

Divide by 5 from both sides.

5x/5=5/5

Solve.

5/5=1

x=1

First, add by 5 from both sides.

-5+4y+4=9+5

Solve.

9+5=14

4y=14

Divide by 4 from both sides.

4y/4=14/4

Solve.

14/2=7

4/2=2

Rewrite as a fraction.

y=7/2

Dividing is another option.

7/2=3.5

y=7/2

Therefore, the correct answer is x=1 and y=7/2.

I hope this helps you! Let me know if my answer is wrong or not.

Written communication involves the exchange of information between a sender and a receiver (option b). It involves transmitting information through written words, symbols, or figures.

The sender encodes the message, and the receiver decodes the message. The receiver is the person or group of people who receive the message and interpret the information provided. The effectiveness of written communication depends on how well the sender conveys the message, and how well the receiver comprehends the message. In business settings, written communication is used to convey important information such as policies, procedures, and performance reports.

The use of written communication allows for clear and concise messages that can be referenced later on. Additionally, written communication can be used as legal evidence in the event of a dispute. Overall, effective written communication requires careful planning, clear messaging, and attention to detail to ensure the receiver accurately understands the intended message.

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Answer:

D

Explanation:

Clearly you can't help the environment by throwing waste in the area, polluting it, or burning it all up, so D would be our only option.

Have a good day :)

According to Jean Piaget, unrealistic idealism often occurs in adolescence as a result of egocentrism. The inability to distinguish between self and others is referred to as egocentrism.

The inability to distinguish between self and others is referred to as egocentrism. It is, more precisely, the incapacity to effectively assume or comprehend any viewpoint other than one's own.

Egocentrism may be present in every stage of life, including childhood, adolescence, and maturity.

Hence option B is correct. According to Jean Piaget, unrealistic idealism often occurs in adolescence as a result of egocentrism.

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Answer:

got it right⬇️✅

Seismic waves are sent from the AP center in an earthquake. Waves move through various materials in a variety of orientations. The seismic waves would go forth at the same pace in all directions, which would be true for everyone who felt the ground trembling. Here option A is the correct answer.

When an earthquake occurs, it generates seismic waves that travel through the Earth's layers and cause the ground to shake. These waves propagate in different directions and interact with the media they encounter, including rock, soil, and water. As a result, the shaking experienced by people who feel the earthquake may vary depending on their location and the type of surface they are standing on.

Out of the given options, only option A can be considered true for all people who feel earth-shaking. This is because seismic waves travel outward from the epicenter in all directions at the same speed, regardless of the type of surface they encounter. However, the other options are not necessarily true for all observers.

Option B, which suggests that the amplitude of the shaking will be the same for all observers, is not accurate because the intensity of the shaking can vary depending on factors such as the distance from the epicenter, the direction of propagation, and the type of soil or rock that the seismic waves encounter.

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Complete question:

An earthquake sends seismic waves outward from the epicenter. the waves travel through different media in different directions. what will be true for all people who feel the earth shaking?(1 point)

A - the seismic waves will travel outward at the same speed in all directions.

B - the amplitude of the shaking will be the same for all observers.

C - the earth will rise and fall with the same frequency.

D - the seismic waves will be equally far apart for all observers.

Answer:

I hope this might help.

Answer: Mass and Distance from the center of mass

Explanation:

The source mass that is causing the gravitational pull, and the distance a test mass is away from the origin of the center of mass

The earth would be 158.84 million kilometers far from the sun if we had 400 days in a year.

The square of a planet's orbital period is proportional to the cube of the length of the semi-major axis of its elliptical orbit.

By using Kepler's third law, relating the orbital period (T) to the average orbital radius (R)

T² is proportional to R³.

The average distance between the sun and the earth is 149.44 million kilometers,

(365 / 400) ²  =  (149.44 / S)³

S = 158.84 million kilometers

Thus, the earth would be 158.84 million kilometers far from the sun if we had 400 days in a year

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The maximum acceleration of the truck when it carries load of 1000 kg is 0.67 m/s².

Given data :

Force moving the truck = empty truck mass x max. acceleration

= 2,000 kg x 1 m/s²

= 2,000 N

The force will remain the same even with a load of 1,000 kg because that is the maximum force the truck is capable of producing.

Therefore,

2,000 N = mass with load x acceleration

2,000 N = (2,000 kg + 1,000 kg) * acceleration

2,000 N = 3,000 kg × acceleration

=> acceleration = 2,000 N / 3,000 kg

=> acceleration = 0.67 m/s²

Its maximum acceleration will be 0.67 m/s².

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784 N is Zach's weight before the elevator starts braking.

The acceleration acting on the Zach before the elevator starts braking is the only acceleration due to gravity.

W= m g

Where

m is the mass of an object.

g is the acceleration due to gravity.

m= Zach’s mass = 80 kg and g= 9.80 m/s²

Thus,

W= 80 x 9.80

= 784 Newton. (N)

The parameter that demonstrates how heavy an object is is its weight. The weight of an object can be determined by multiplying its mass by the gravitational acceleration.

Therefore, Zach’s apparent weight before the elevator starts braking is 784 N.

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Complete question:

Zach, whose mass is 80 kg, is in an elevator descending at 10 m/s. The elevator takes 3.0 s to brake to a stop on the first floor.

a. What is Zach’s weight before the elevator starts braking?

Explanation:

Kinetic energy of an object is given by :

\(E=\dfrac{1}{2}mv^2\)

Where

m is mass and v is velocity of the object

A. Mass, m = 300 kg.

Speed, v = 60 km/h = 16.67 m/s

\(E=\dfrac{1}{2}\times 300\times 16.67^2\\\\=41683.33\ J\)

B. Mass, m = 1100 kg.

Speed, v = 60 km/h = 16.67 m/s

\(E=\dfrac{1}{2}\times 1100\times 16.67^2\\\\=152838.89\ J\)

C. Mass, m = 900 kg.

Speed, v = 80 km/h = 22.22 m/s

\(E=\dfrac{1}{2}\times 900\times 22.22^2\\\\=222177.78\ J\)

D. Mass, m = 2000 kg.

Speed, v = 50 km/h = 13.88 m/s

\(E=\dfrac{1}{2}\times 2000\times 13.88^2\\\\=192654.4\ J\)

The kinetic energy in case C is maximum.

The effect of the factors which he can he actually find out using only this lamp to determine the size of shadow is the light intensity and type of object.

This forms part of the scientific methods and is referred to as a procedure which is used to support or refute an hypothesis.

The size of the shadow is dependent on factors such as the light intensity and the type of object. Since the lamp produces the light in which the intensity can be gotten and the type of material it is in contact with then it therefore the correct choices.

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When the beakers are connected by a siphon, water will flow from the wider beaker to the narrower beaker until the water levels in the two beakers are the same.

This is because water seeks its own level, and the pressure exerted by a column of liquid is proportional to its height and density. As water flows from the wider beaker to the narrower beaker, the water level in the wider beaker will decrease, while the water level in the narrower beaker will increase. The flow of water will continue until the water levels in the two beakers are the same, at which point the siphon will stop.

The reason for this is that the pressure at any given point in a liquid is the same in all directions. As water flows through the siphon, it creates a pressure difference between the two ends of the siphon. The pressure at the bottom of the wider beaker is higher than the pressure at the bottom of the narrower beaker, because the wider beaker has a larger surface area and therefore a greater weight of water pushing down on it. This pressure difference creates a force that pushes water through the siphon from the wider beaker to the narrower beaker.

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The method used by astronomers to infer the existence in space of a dark object of about 5 solar masses, such as a black hole, is the measurement of the effect of its gravitational force on a companion object in a binary system. This method is known as the radial velocity or Doppler shift method.

The gravitational pull of the black hole causes the companion object to move in an orbit, and the measurements of the Doppler shift of its spectral lines can reveal the presence of the black hole.

Other methods such as the measurement of the gravitational redshift of spectral lines in the spectrum of the object and estimation of the luminosity of the object and the application of the mass-luminosity relationship can also be used to infer the existence of a black hole.

Infrared imaging of a region whose effective temperature is lower than the cosmic microwave background, rendering it dark, can also reveal the presence of a black hole by detecting the radiation emitted from the heated material surrounding it.

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Bodily injury due to slips and falls is considered a physical hazard from conditions involving: surface residues.

In general, injuries can be caused by:

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An absolute value inequality to describe this situation will be

| 2.5 ≤ W ≤ 11.5 |

An absolute value can be a value of any variable which will always be non - negative value.

Given that an average birth weight of a new born baby is 7 pounds. However, this weight can vary as much as 4.5 pounds. This means the weight can be

7 + 4.5 = 11.5

or

7 - 4.5 = 2.5

If W = average birth weight of a new born baby which is 7 pounds

Therefore, an absolute value inequality to describe this situation will be

| 2.5 ≤ W ≤ 11.5 |

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Answer:

As the roller coaster goes higher, more potential energy is increased in the roller coaster. Caused by gravity and the roller coaster's position, the potential energy is stored in the roller coaster. For example, this ball is at the top of a hill, where potential energy is at it's highest. Potential energy can be calculated by Potential Energy=Mass X Acceleration X Height.

Explanation:

The factor that impact the amount of potential and kinetic energy should be explained below.

Since the roller coaster should be high which there should be more potential energy and the same should be increased.

Due to the gravity and the position of the roller coaster the potential energy should be stored in the rolar coaster.

Just like when the ball is in the top of the hill when there is high potential energy so in this way it should be impacted.

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As a result, X heat required = 27Q is the amount of heat needed to raise the temperature.

first case

Q = Specific Heat * Density of Sphere* (4/3*pi*D^3) * (7-4)     -1

Second case

X = Specific Heat * Density of Sphere* (4/3*pi*(3D)^3) * (7-4)    -2

Dividing 1 and 2 we get

Q/X = 1/27

27

where Q is the amount of heat that is transported to or from the item, m is the object's mass, C is the material's specific heat capacity, and T is the resultant temperature change of the object.

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Answer: 90 Km

Explanation:

15 Km/hr X 6/hr = 90Km

Answer:

Temperature is a physical quantity that expresses hot and cold. It is the manifestation of thermal energy, present in all matter, which is the source of the occurrence of heat, a flow of energy, when a body is in contact with another that is colder or hotter.

Explanation:

Answer:

Temperature is a physical quantity that expresses hot and cold.

Explanation:

Answer:

as space stretches, the waves of radiation in space also stretch and their wavelength increases

Explanation: