during a very quick stop, a car decelerates at 6.6 m/s2. assume the forward motion of the car corresponds to a positive direction for the rotation of the tires (and that they do not slip on the pavement). what is the angular acceleration of its tires in rad/s2, assuming they have a radius of 0.275 m and do not slip on the pavement?

The planet of an item will remain constant across the planet, but if you give it more mass, the gravitational force increases while the acceleration due to gravity remains constant.

The mass of the body is defined as the amount of matter a body has. It is denoted by m and its unit is kg. Mass is the quantity on which a lot of physical quantity depends.

Weight is defined as the amount of force an object exerts on the surface. It is given as the product of mass and the gravitational pull.

Mass is an independent quantity it never depends on the other. While weight is a dependent quantity that depends upon the gravitational pull.

The value of gravitational pull is different in the different parts of the universe. For example, on the earth, the value of gravitational acceleration is 9.81 m/sec².While on the moon it is g/6.

Weight is change according to the place or surrounding while the mass of the body is constant everywhere.

The planet of an item will remain constant across the cosmos, but if you give it more mass, the gravitational force increases while the acceleration of gravity remains constant.

If a planet's gravity weakens, the weight of that planet will likewise be altered. With an increase in mass, weight also rises.

Hence, the gravitational force increases while the acceleration due to gravity remains constant for the given case.

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Jane's rate along the summit was 25 mph.

Let's assume that Jane's rate along the summit is represented by the variable "x" in miles per hour. We know that she rode 72 miles uphill at a rate that was 5 mph slower than her rate along the summit. Therefore, her rate uphill would be (x - 5) mph.

To find her average rate for the entire journey, we can calculate the total time taken for each segment and divide it by the total distance covered.

Time taken to ride uphill = Distance / Rate

Time taken to ride uphill = 72 miles / (x - 5) mph

Time taken to ride along the summit = Distance / Rate

Time taken to ride along the summit = 21 miles / x mph

Since the total time taken for the entire journey is 3 hours, we can write the equation:

Time taken to ride uphill + Time taken to ride along the summit = Total time

72 / (x - 5) + 21 / x = 3

By solving this equation, we find that x = 25 mph. Therefore, Jane's rate along the summit was 25 mph.

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The car traveled a distance of 210 feet during the 3-second interval of deceleration.

To find the distance traveled during the 3-second interval, we need to use the following formula:

distance = initial velocity x time + 0.5 x acceleration x time^2

Initially, the car was traveling at 88 ft/sec (60 mi/hr), so:

initial velocity = 88 ft/sec

The car is decelerating at a constant rate of 12 ft/sec^2, so:

acceleration = -12 ft/sec^2 (negative because it's decelerating)

The time of the interval is 3 seconds:

time = 3 seconds

Plugging these values into the formula, we get:

distance = 88 ft/sec x 3 sec + 0.5 x (-12 ft/sec^2) x (3 sec)^2

distance = 264 ft - 54 ft

distance = 210 ft

Therefore, the car traveled a distance of 210 feet during the 3-second interval of deceleration.

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Answer:

E = 0.437 N/C

Explanation:

Given that,

Charge, \(q=8\times 10^{-4}\ C\)

Electric force, \(F=3.5\times 10^{-4}\ N\)

Let the strength of the electric field is E. We know that, the electric force is given by :

F = qE

Where

E is the electric field strength

\(E=\dfrac{F}{q}\\\\E=\dfrac{3.5\times 10^{-4}}{8\times 10^{-4}}\\E=0.437\ N/C\)

So, the strength of the electric field is equal to 0.437 N/C.

Answer:

The spring force is called a restoring force because the force exerted by the spring is always in the opposite direction to the displacement. This is why there is a negative sign in the Hooke's law equation. Pulling down on a spring stretches the spring downward, which results in the spring exerting an upward force.

Answer:

A

Explanation:

Answer: plasma

Explanation: plasma has charged particles called ions, and free electrons

Answer:

60 - 45 = A. 15

Explanation:

Subtracted because the plane mirror at an angle is incidence of 60°, so then in order to find the value it would be 60-45 and not adding it or dividing and multiplying to find the value thus the answer is 15.

60 - 45 = A. 15. Subtracted because the plane mirror at an angle is incidence of 60°, so then in order to find the value it would be 60-45 and not adding it or dividing and multiplying to find the value thus the answer is 15.

A flat or highly polished surface called a plane mirror reflects light or waves to create an image. It is a polished, smooth surface that creates a virtual representation of the actual object.

A plane mirror is a surface on which an image can only be produced by at least two light beams. The intersection of these two beams can occur inside the mirror or appear to occur somewhere behind the mirror.

The image that follows illustrates how an object appears when viewed via a plane mirror.

Therefore, 60 - 45 = A. 15. Subtracted because the plane mirror at an angle is incidence of 60°, so then in order to find the value it would be 60-45 and not adding it or dividing and multiplying to find the value thus the answer is 15.

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Answer:

bro we cant do this

Explanation:

Answer:

The energy resource brought into a coal power plant is coal.

Found the answer at: https://www.tva.com/energy/our-power-system/coal/how-a-coal-plant-works#:~:text=Coal%2Dfired%20plants%20produce%20electricity,to%20start%20the%20process%20over.

The waste produced by coal power plants is coal ash and the energy produced by coal power plants is electricity.

Answers found at: http://www.groundtruthtrekking.org/Issues/AlaskaCoal/Coal-Ash-Combustion-Wastes.html       and        https://www.tva.com/energy/our-power-system/coal/how-a-coal-plant-works#:~:text=Coal%2Dfired%20plants%20produce%20electricity,to%20start%20the%20process%20over.

The two laws of thermodynamics apply to what I found out in my research because I know that the entropy increase due to the combustion of conventional fuels is much larger than that resulting from that of nuclear fuels, and is therefore much more dangerous. Also, I know that heat is used to burn coal and create energy.

Found answer at: https://www.encyclopedie-energie.org/en/energy-consumption-and-entropy-release-in-the-biosphere/

Explanation:

Hope this helps, i got an okay score on it but better than nothing i guess lol

Answer:

5.03×10¯⁷ N

Explanation:

From the question given above, the following data were obtained:

Mass of the person (M₁) = 55 Kg

Mass of the car (M₂) = 1234 Kg

Distance apart (r) = 3 m

Gravitational constant (G) = 6.673×10¯¹¹ Nm²/Kg²

Force (F) =?

The force between the person and his car can be obtained as follow:

F = GM₁M₂ / r²

F = 6.673×10¯¹¹ × 55 × 1234 / 3²

F = 6.673×10¯¹¹ × 67870/ 9

F = 5.03×10¯⁷ N

Thus, the force between the person and his car is 5.03×10¯⁷ N

Answer:

a) Uniform rectilinear motion

b) 600 m

c) 20 m/s

Explanation:

a) average velocity is described as the change of position divided by the time of travel, so v= ∆x/∆t. This is a linear function (y = mx+ q) which is the same structure of the equation needed to calculate average velocity (x2= x1 + vt). If you do the ratio between a distance and the corresponding time you'll see that the average velocity is the same, which is typical of this kind of motion.

b) At the the time of 30 seconds the corresponding distance on the y axis is 600 m.

c) Again, v=∆x/∆t and we can rewrite is as v=x2-x1/t. If you take the same data we've used before you can write v= 600m-0/ 30s= 20 m/s. The average velocity is 20 m/s.

The highest surface air pressure ever recorded occurred when the air was exceptionally dense and heavy. This typically happens when cold air sinks and accumulates near the surface, creating a high-pressure system.

One notable example of such a system was the Siberian High, which occurred in December 1968. The air pressure recorded in Siberia reached an astonishing 1085.7 millibars, the highest ever recorded on Earth's surface. This extreme pressure was caused by the combination of intense cold and a massive high-pressure system that covered a vast area.

High-pressure systems can have significant impacts on weather patterns, often leading to clear skies and dry weather. However, they can also bring cold temperatures and increased air pollution due to trapped emissions. Overall, understanding how pressure and air density interact is essential for predicting weather patterns and understanding the Earth's atmosphere.

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Answer:

This one I think is either division or multiplication

Answer: 42.41 cm

Explanation:

Explanation:

hug is not the only solution to help someone you can take them to Peaceful place and sit with them saying nothing.

Answer:

a change in velocity can be a change in magnitude (or speed), but it can also be a change in direction.

The statement that is NOT an argument for Cygnus X-1's being a true black hole is d. X-rays from Cygnus X-1 vary on time scales as short as a millisecond.

What is a black hole?

A black hole is a celestial body that results from the death of a massive star. The black hole's gravitational pull is so strong that it prevents anything from escaping it, including light. As a result, black holes are invisible and can only be detected by the effects of their gravitational pull on other objects.

What is Cygnus X-1?

Cygnus X-1 is a binary star system located approximately 6,000 light-years away in the constellation Cygnus. The system contains a massive blue super giant star and a compact object that is believed to be a black hole, which orbits each other.

Cygnus X-1 was the first black hole discovered.The following are some arguments for Cygnus X-1's being a true black hole:

a. Cygnus X-1's mass is estimated to be about 10 solar masses

.b. Spectroscopic data suggests hot gas is flowing from the companion B star onto Cygnus X.1.

c. X-ray observations around the object support a temperature of several million . Among the options given in the question, d. X-rays from Cygnus X-1 vary on time scales as short as a millisecond is NOT an argument for Cygnus X-1's being a true black hole.

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Answer:

V = 4/3 π R^3 = 4/3 π (D/2)^3 = 1/6 π D^3

dV / dD = 1/2 π D^2       rate of change of volume related to diameter

dV = 1/2 π D^2 dD

dV = 1/2 π 80^2 * 4 mm^3       the radius increases at 1/2 the speed of the diameter

dV = 40,200 mm^3/s

Answer:

Explanation:

The question relates to time of flight of a projectile .

Time of flight = 2 u sinθ / g

u is speed of projectile , θ is angle of projectile

= 2 x 48.5 sin42 / 9.8

= 6.6 seconds  .

Maximum height attained

= u² sin²θ / g

= 48.5² sin²42 / 9.8

= 107.47 m .

Answer:

Distance = 1256 m

Displacement = 0

Explanation:

Distance :

Distance may be defined as the actual length between two points along its path.

It is a scalar quantity and its value can be positive or zero.

Displacement :

Displacement is defined as the shortest length between two point , i.e. between the initial point and the final point.

It is a vector quantity and it has values which can be either positive or negative or zero.

From the question, the diameter of the circular track is, r = 200 m

∴ Distance travelled by an athlete is = circumference of the circular track

                                                            = 2πr

                                                            = 2 x 3.14 x 200

                                                            = 1256 m

 Displacement = 0  (since the original point coincides with the final point).

Yes, it is commonly attributed to Albert Einstein that he said, "Compound interest is the eighth wonder of the world. He who understands it, earns it... he who doesn't... pays it."

However, there is no direct evidence that he actually said this, and some sources suggest that the quote may have been misattributed to him. Nonetheless, the quote has become popular in the world of finance and investing as a way to emphasize the power of compound interest in generating wealth over time.

Compound interest refers to the process of earning interest on both the initial amount of an investment and on the accumulated interest. This means that as time goes on, the amount of interest earned can grow exponentially, leading to significant gains in the value of an investment over the long term. This is why compound interest is often referred to as the "eighth wonder of the world" as it can have a dramatic impact on financial outcomes.

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Answer:

A wedge can split an object apart

A  lever is the seesaw

inclined plane is a ramp

a pulley can reduce the amount of friction

wheel and axle is the rope one

Explanation:

Following are the matches:

Simple machines are basic mechanical devices that can help make work easier by reducing the amount of force or effort needed to do a task. They are usually the most basic forms of machines, often made up of only one or two parts, and are used to change the direction or magnitude of a force.

There are six types of simple machines:

Simple machines are the building blocks for more complex machines, and they are used in many everyday devices and equipment to make work easier and more efficient.

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Answer:

No where

Explanation:

Current is the same everywhere in the circuit

The speed changes as a result of the energy being transferred into a container filled with magnetic marbles and the kinetic energy produced by the container's gentle shaking. Phase shifts will result from this.

The energy of a system changes together with each phase change it undergoes. These involve kinetic energy transmission to a system. Endothermic reactions occur when a condition changes from being more ordered to being less ordered. Exothermic reactions are always involved in transitions from one state to another that is more organised.

When a substance transforms from one state to another, a phase change occurs in the system. When the system receives enough energy or loses enough energy, these changes take place. Phase changes also happen when the system's pressure is altered.

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Complete Question:

Describe how does transferring energy into a container of magnetic marbles affect the speed by shaking the container gently?

Answer:

I don't know

Explanation:

The impulse on the car is 12 kg m/s. Impulse is the integral of the force applied on the object and the time period for which it is applied.

Impulse is the integral of a force, F, over the time interval, t, for which it acts on an object. Since, force is a vector quantity, therefore impulse is also a vector quantity because it has both the magnitude and direction. Impulse applied to an object produces an equivalent vector change in its linear momentum. The SI unit of impulse is the newton second (N⋅s) or kilogram meter per second (kg⋅m/s).

Impulse = Change in momentum

ΔP = F × ΔT

where, F = Force applied on the object,

ΔT = change in time

ΔP = Pf - Pi

where, ΔP = change in momentum,

Pf = final momentum = m × v,

Pi = initial momentum = m × u

Pf = 1.5 kg × 10 = 15 kg m/s

Pi = 1.5 × 2.0 = 3.0 kg m/s

ΔP = 15 - 3

ΔP = 12 kg m/s

Therefore, the impulse is 12 kg m/s.

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(A) The relationship between current and voltage when resistance is constant represents by graph 2. Option B is correct.

(B) Relationship between current and voltage is direct. Option B is correct.

Resistance is the electric component that regulates the flow of current through the conductors or circuits.

Here,
From ohm's low, we have
Voltage = Current × resistance

As resistance = constant
Voltage ∝ Current

The above expression implies that Voltage becomes directly proportional to the current. So as current increases voltage also increases simultaneously [Option B is correct]. And graph between current and voltage will be a straight line passing through the origin Option B is correct.

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The voltage or potential difference across an electric circuit is directly proportional to the current flowing through the circuit. Thus, the correct options for 1 and 2 are B and B, respectively.

Ohm's law is the description of the relationship between two variables which are current, voltage, and a constant called resistance. The amount of steady current which passes through a large number of materials is directly proportional to the potential difference, or the voltage across the materials or electric circuit.

It can be expressed as: V = IR

where, V is the potential difference across the circuit,

I is the electric current,

and R is the resistance

As voltage is directly proportional to the current. If the voltage is increasing, then the current will also increase and if the voltage decreases then the amount of current through the circuit also decreases.

Therefore, the correct options for 1 and 2 are B and B, respectively.

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The velocity of the ball = 18.84 rad/sec

The centripetal acceleration of the ball = 236.63 m/s²

The centripetal force of the ball = 118.32 N

The mass of the ball = 0.5 kg

The length of the string = 1.5

The time taken = 60 s

The number of rotations = 120

The velocity of the ball can be found using the formula,

              ω = θ / t

where ω is the angular velocity

           θ is the angular rotation

           t is the time taken

Let us substitute the known values in the above equation, we get

               ω = (120 x 2 x 3.14 x 1.5 ) / 60

                    = 1,130.4 / 60

                    = 18.84 radians/sec

The formula for centripetal acceleration is

                α = ω² / r

                    = 18.84² / 1.5

                    = 345.95 / 1.5

                    = 236.63 m / s²

The centripetal force is

              F = mω² / r

                 = 0.5 x 236.63

                 = 118.32 N

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The star is moving away from Earth at a velocity of 1.8 x 106 m/s.

The Doppler Effect describes the shift in wavelength of a wave when the source is moving in relation to the observer. The shift can be observed in sound waves, light waves, and other waves.

The Doppler Effect can be used to determine the velocity of objects moving away from an observer, as in the case of stars moving away from Earth.

The velocity of a star moving away from Earth can be determined using the equation:

v = Δλ/λ x c, Where v is the velocity of the star, Δλ is the shift in wavelength of the spectral line, λ is the wavelength of the spectral line measured in the lab on Earth, and c is the speed of light (3.00 x 108 m/s).

In this case, the shift in wavelength of the spectral line is Δλ = 500.3 nm - 500 nm = 0.3 nm.

The wavelength of the spectral line measured in the lab on Earth is λ = 500 nm.

Plugging in these values to the equation above: v = Δλ/λ x cv = (0.3 nm / 500 nm) x (3.00 x 108 m/s) = 1.8 x 106 m/s.

Therefore, velocity of star 1.8 x 106 m/s.

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