Guys fr i don't understand physics
if it takes 10 seconds to drive around 450 cm.
Using your mathematical model, calculate the distance your car would travel at 15 seconds.

Answer:

Topographic maps give the user the ability to view a three-dimensional landscape on a two-dimensional map. One who is able to read a topo map can identify the elevation and location of valleys, peaks, ridges, and other land features.

Explanation:hope this helps

c . The book has potential energy and the bike has kinetic energy statement is correct

Let's use an illustration to demonstrate P. E. and K.E. The hammer has potential energy, which it will have as you raise it higher. On the other hand, the hammer will have kinetic energy when you lower it to strike the surface of the table.

Only chemical energy, which is potential energy held inside the item and in the union of its atoms and molecules, is not regarded as kinetic energy. Motion is created by kinetic energy. Any item in motion has kinetic energy. The more kinetic energy an item possesses, the heavier and quicker it moves. The wheels of a bicycle spin when you push off the pedals.

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The material that has the lowest resistivity is silver. Hence, option D) aligns well with the answer.

Resistivity is a material property that represents the resistance offered by a material to the flow of electrical current. It is denoted by the Greek letter ρ (rho) and has units of ohm-meters (Ω⋅m).

The resistivity of a material depends on its chemical composition, crystal structure, and temperature. The higher the resistivity of a material, the more difficult it is for electrical current to flow through it.

Manganin is a metallic alloy composed of copper, manganese, and nickel. It is used for making precision resistors and strain gauges because of its low temperature coefficient of resistance. It has a resistivity of about 4.82 × 10−7 Ω⋅m.

Copper is a good conductor of electricity and is used for making electrical wires and cables. It has a resistivity of about 1.68 × 10−8 Ω⋅m.

Constantan is an alloy of copper and nickel. It is used for making thermocouples and resistors because of its low thermal conductivity and temperature coefficient of resistance.

It has a resistivity of about 4.9 × 10−7 Ω⋅m. Silver is the best conductor of electricity and is used for making electrical contacts, switches, and wires that require high conductivity.

It has a resistivity of about 1.59 × 10−8 Ω⋅m. Therefore, the material that has the lowest resistivity is silver.

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Answer:

The measurement of an object's motion with respect to any other object that is moving or stationary is called Relative Motion.

The chemical energy used to drive the light independent reactions, also known as the Calvin cycle, is in the form of ATP and NADPH.

ATP, or adenosine triphosphate, is a high-energy molecule that stores and releases energy. It is produced during the light-dependent reactions of photosynthesis through the process of photophosphorylation. NADPH, or nicotinamide adenine dinucleotide phosphate, is another high-energy molecule that is also produced during the light-dependent reactions through the process of non-cyclic electron flow.

Both ATP and NADPH are used in the light independent reactions to power the conversion of carbon dioxide into glucose and other sugars. The energy from these molecules is used to drive the fixation of carbon dioxide by an enzyme called rubisco, which converts it into a carbohydrate called 3-phosphoglycerate. This process is the key to the synthesis of glucose and other sugars in photosynthesis.

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The change in the internal energy of a system is equal to the difference in energy transferred to or from the system as heat and work done.

Work done is the energy needed or supplied to perform any task.

The first law of thermodynamics gives the relation between the heat and work done.

The heat added to a system is divide into two. One portion adds up heat to increase the internal energy and the left heat is used to do work.

ΔQ = ΔU + W

ΔU = ΔQ -W

Thus, the first law of thermodynamics states that the change in the internal energy of a system is equal to the difference in energy transferred to or from the system as heat and work done.

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True, this is because the echo sounder that is applicable to boats cannot be used directly for airplanes

By sending out sound waves and timing how long it takes for them to bounce back, an echo sounder, sometimes referred to as a sonar, is a device frequently used in boats to gauge the depth of the water beneath the craft.

When a sound pulse from an echo sounder strikes a solid item in the water, such as fish, vegetation, or other objects, the signal is reflected back to the surface.

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Firstly, the bomb causes things in its vicinity to move at very high speeds. This allows scientists to measure the effects of time dilation, which is a key aspect of the theory of relativity.

Secondly, the mass of the bomb when it explodes is much greater than its normal mass. This increase in mass is due to the energy that is released during the explosion.

The explosion of a nuclear bomb provides evidence of the theory of relativity in several ways. Firstly, the bomb causes things in its vicinity to move at very high speeds. This allows scientists to measure the effects of time dilation, which is a key aspect of the theory of relativity. Essentially, the faster an object moves, the slower time passes for it. This means that the clocks of objects moving at high speeds will tick slower than those of stationary objects. By measuring the time dilation caused by the nuclear explosion, scientists were able to confirm the predictions of the theory of relativity. Secondly, the mass of the bomb when it explodes is much greater than its normal mass. This increase in mass is due to the energy that is released during the explosion. This is in accordance with the famous equation E = mc2, which is a key component of the theory of relativity. This equation shows that energy and mass are equivalent, and that a small amount of mass can be converted into a large amount of energy. Finally, the bomb produces energy in accordance with E = mc2, and this energy is released in the form of radiation. This radiation can have a harmful effect on living organisms, including humans. It shortens the lifetimes of all people who happen to be near it when it detonates. This is a reminder of the incredible power of nuclear energy and the importance of using it responsibly. Overall, the explosion of a nuclear bomb provides evidence of the theory of relativity by demonstrating the effects of time dilation, confirming the equation E = mc2, and highlighting the potential dangers of nuclear energy.

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Answer: Negative Incentives

Decrease

More

Explanation:

Took it on EDG 2021

Price can be defined as the amount of money that must be paid by a buyer (customer) to a seller (producer or owner), so as to acquire goods and services.

This ultimately implies that, it is an amount of money a customer that is buying goods and services are willing to pay to the seller (producer or owner) for the goods and services being offered.

In this scenario, we can deduce the following points:

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Answer:

global warming

Explanation:

cuz duh.... .....

Answer:

6 seconds

Explanation:

\(d=v_ot+\dfrac{1}{2}at^2\)

Since the object is being dropped out of the window, it has no initial velocity.

\(176.4=\dfrac{1}{2}(9.8)t^2 \\\\t^2=36 \\\\t=6\text{ seconds}\)

Hope this helps!

Answer:

6 seconds

Explanation:

The formula for free fall is:

h = 1/2gt^2

We know that the height is 176.4 meters. We also know that on Earth, gravity is 9.8 m/s^2.

h=176.4

g=9.8

Substitute these values into the formula.

176.4=1/2(9.8)*t^2

Multiply 9.8 and 1/2

176.4=4.9*t^2

t^2 and 4.9 are being multiplied. The opposite of multiplication is division. Divide both sides by 4.9

176.4/4.9=4.9*t^2/4.9

176.4/4.9=t^2

36=t^2

t is being squared. The opposite of squared is the square root. Take the square root of both sides.

√36=√t^2

√36=t

6=t

t=6 seconds

It will take 6 seconds for the object to fall 176.4 meters.

The term "short circuit current rating" is often used interchangeably with interrupting rating in the electrical industry, but there is a subtle difference.

Interrupting rating refers to the maximum current level that a circuit breaker or other protective device can safely interrupt without damage, whereas short circuit current rating refers to the maximum level of fault current that a device or system can withstand without damage.

In other words, interrupting rating is a measure of a device's ability to stop a fault, while short circuit current rating is a measure of its ability to withstand the fault.

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False. The statement that the resistances measured in the experiment are very small and less than 1 Ω cannot be determined solely based on the information provided.

The values of resistance in an experiment can vary widely depending on the specific setup and components used.

Resistances can range from very small values (less than 1 Ω) to extremely large values, depending on the context and purpose of the experiment. Additional information about the specific experiment and its components would be needed to make a definitive statement about the resistances being measured.

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Answer:

2-3-1-4

Explanation:

First you will need an energy source so 2 is the first step.

Then the lead and lead oxide are reformed during re-charge so 3 is the second step.

The battery is back in operation when Lead dissolves in acid so 1 is the third step.

Battery produces electrons so 4 is the final step.

Answer:

True

Explanation:

It is true that. A technician can be electrocuted when working on HEVs or EVs, therefore the correct answer is option A

An EV stands for an electric vehicle. Electric vehicles (EVs) are autos that are powered totally or partially by electricity. Electric cars are extremely cost-effective to run because they have fewer moving parts to maintain and use little to no fossil fuels (petrol or diesel).

When evaluating its environmental impact, every factor must be taken into consideration. Considering that EVs have a minimal overall environmental impact, this suggests that the severity of these production emissions decreases.

Recycling is one strategy for lowering the lifespan emissions of electric vehicles. Again, incorrect assumptions can be refuted by facts.

Thus, That is accurate. The correct response is option A because a technician could electrocute themselves while working on HEVs or EVs.

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The total distance the ball travels up and down is 4 + 1.75h meters. The ball in question is subject to a specific scenario where it is dropped from a height of 4 meters and rebounds to a height of 0.75 times its previous height after each strike on the pavement.

To find the total distance the ball travels up and down, we need to consider both the distance it falls and the distance it rebounds.

The ball is dropped from a height of 4 meters, so it falls a distance of 4 meters.

After striking the pavement, it rebounds to a height of 0.75h meters.

Since it falls from a height of h meters after each rebound, it falls a distance of h meters before each rebound.

Therefore, the total distance the ball travels up and down is given by the sum of the distances it falls and rebounds.

Total distance = Distance fallen + Distance rebounded

Total distance = 4 + h + 0.75h

Total distance = 4 + 1.75h

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Answer The force is multiplied times 9

Explanation:

The acceleration due to gravity on this planet is 19.6 m/s².

Acceleration is the rate at which the speed and direction of a moving object vary over time. A point or object going straight ahead is accelerated when it accelerates or decelerates. Even if the speed is constant, motion on a circle accelerates because the direction is always shifting. Both effects contribute to the acceleration of all other motions.

In mechanics, gravity also known as gravitation is the constant force of attraction that pulls all things together. It has little impact on determining the intrinsic characteristics of common stuff because it is by far the weakest known force in nature.

Calculation:

The acceleration due to gravity on the earth's surface is given by

g = ​\(\frac{GM}{R^{2} }\)

Now, Mp ​= \(\frac{M}{2}\)​, Rp ​= \(\frac{R}{2}\)​

The acceleration due to gravity on the new planet is:

\(g_{p}\) = \(\frac{GM_{p} }{R_{p} ^{2} }\)  ​​=  \(\frac{GM/2}{R^{2} /4^{} }\) ​= 2g 

\(g_{p}\) ​= 2 × 9.8 = 19.6 m/s².

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The optical effect known as doubling, specifically double refraction, can help separate diamond from other gemstones.

The optical effect known as doubling, specifically double refraction, can help separate diamond from other gemstones. Double refraction is a property exhibited by certain transparent minerals, including diamond, where light passing through the material is split into two rays, each following a slightly different path.

When a gemstone such as diamond is viewed through a polarizing filter, the double refraction effect becomes apparent. By rotating the gemstone and observing how the light interacts with the filter, gemologists can distinguish diamond from other gemstones that do not exhibit double refraction.

Diamonds have a higher refractive index compared to most other gemstones, meaning they refract light more intensely. As a result, the double refraction effect in diamonds is typically more pronounced. This optical property, along with other characteristics like high dispersion (which creates the "fire" in diamonds) and hardness, is a useful diagnostic tool for gem identification.

However, it's important to note that double refraction alone is not a definitive test for determining if a gemstone is a diamond. Other gemstones, such as some varieties of zircon or garnet, can also display double refraction to a certain extent. Therefore, a combination of various gemological tests and analyses is necessary to accurately identify a gemstone, including diamond, in a comprehensive manner.

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Answer:

The Sun transfers in each second and amount of 1367J per square meter, so in hour it can transfer:

E = 60*60*1367 J/h*m2 = 4,921,200 J/h*m^2.

in one year, we have 3000h*4,921,200 J/h*m^2. = 14,763,600,000 Joules per square meter.

Now, only 20% of this can be used as energy, so the amount that can be used is:

E = 0.2* 14,763,600,000 J/m^2 = 2,952,720,000 J/m^2

Now, we want to find the number X of square meters such:

X*2,952,720,000 J/m^2 = 4x10^11 J

X = ( 4x10^11 J)/(2,952,720,000 J/m^2) = 135.5 m^2

So you only need around 135.5 square metters per house.

The ship is 375.21 feet away from the base of the lighthouse.

The distance from the ship to the base of the lighthouse, we can use trigonometry and the concept of the angle of depression.

Assume that the distance from the base of the lighthouse to the ship is represented by "x" (in feet).

The angle of depression is the angle between the line of sight from the top of the lighthouse to the ship and the horizontal line. In this case, the angle of depression is given as 29 degrees.

We can set up a right triangle with the height of the lighthouse (208 ft), the distance from the base of the lighthouse to the ship (x), and the line connecting the top of the lighthouse to the ship (hypotenuse).

In a right triangle, the tangent of an angle is defined as the ratio of the length of the opposite side to the length of the adjacent side.

Using the tangent function, we can write the equation:

tan(29 degrees) = 208 ft / x

Solve for x, we can rearrange the equation:

x = 208 ft / tan(29 degrees)

Using a calculator, we can find the value of the tangent of 29 degrees and then divide 208 ft by that value to determine the distance "x".

Calculating x:

x = 208 ft / tan(29 degrees)

x ≈ 208 ft / 0.5543

x ≈ 375.21 ft

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The calorimeter constant of a 3.05-g sample of lactic acid which is burned in a bomb calorimeter at tex]25^{\circ}C\), and the temperature increases by \(2.85^{\circ}C\) is  \(-16.00 \frac{kJ}{^\circ C}\)

To find the calorimeter constant, we will first determine the moles of lactic acid, then use the heat of combustion and the temperature change to find the heat released by the reaction. Finally, we will calculate the calorimeter constant using the formula \(U_C = C\triangle T\) .

1. Calculate moles of lactic acid:

Molar mass of lactic acid \((C_3H_6O_3) = 3(12.01) + 6(1.01) + 3(16.00) = 90.08 g/mol\)
Moles of lactic acid = (mass of lactic acid) / (molar mass)
Moles of lactic acid = \(\frac{3.05 g}{90.08 \frac{g}{mol} }= 0.0339 mol\)

2. Calculate heat released by the reaction:
Heat released (q) = moles \(\times[\tex] heat of combustion
q = 0.0339 mol\(\times[\tex](-1343.9 kJ/mol) = -45.60 kJ

3. Calculate the calorimeter constant:

Using the formula \(U_C = C\triangle T\), rearrange it to solve for C:
\(C = \frac{U_C}{\triangle T}\)
\(C = \frac{-45.60 kJ}{2.85°C } =-16.00 \frac{kJ}{^\circ C}\)

The calorimeter constant is \(-16.00 \frac{kJ}{^\circ C}\)

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Answer:

C. The light waves will bend as they hit the water and slow down because water is a denser medium than air.

Explanation:

Refraction, or the bending of light, is caused by a change in the medium through which it passes. Air and water have different optical densities. As a result, light that enters the water is refracted more normally.

Answer:

Alaska and Hawaii

Explanation:

Answer:

For a dry-cell battery to operate, oxidation will occur from the zinc anode and reduction will take place in the cathode. The most common type of cathode is a carbon graphite. Once reactants have been turned into products, the dry-cell battery will work to produce electricity.

Explanation:

The battery operates through electrochemical reactions called oxidation and reduction. These reactions involve the exchange of electrons between chemical species. If a chemical species loses one or more electrons, this is called oxidation. The opposite process, the gain of electrons, is called reduction.

By measuring the ball's diameter d and dividing it by the time t it takes for it to cross the photogate, one can also calculate the ball's initial horizontal velocity. Therefore, Vo = d/t.

A cannonball is a projectile by definition, and because of the consistent acceleration it receives from gravity, it travels along a parabola.

The path an item in motion follows through space as a function of time is known as a trajectory, also referred to as a flight path. A whole trajectory is defined by position and momentum simultaneously because in classical mechanics, a trajectory is given by Hamiltonian mechanics using canonical coordinates.

The formula below can be used to determine how long it will take for a trajectory to reach its highest point.

time equals (u sin)/g

Where,

Initial Velocity = u

the trajectory's angle

g = acceleration-induced gravity

Given the launch angle of 63° and initial velocity of 147 m/s, the acceleration is 9.8 m/s2. Consequently, we may express the time as,

time equals (u sin)/g

time is equal to (147 m/s sin(63°)) / (9.8 m/s2).

time = 13.4s

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Answer:false

Explanation:

As current increases, the wires heat which can cause a fuse to blow or a circuit breaker to trip. As additional branches are added to a parallel circuit, the overall resistance of the circuit decreases. A decrease in resistance creates an increase in current.

A battery (or other energy source), a light bulb (or other energy-consuming device), and conducting wires that connect the two terminals of the battery to the two ends of the light bulb make up a simple electric circuit.

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Answer:

The speed of the bus moving at a speed of 45 km/h in m/s is (a) 1.25 x \(10^{1}\) m/s.

Explanation:

What is speed?

Speed is defined as the distance covered by a moving body in unit time (that is 1 s, 1 minute, or 1 h).

The bus is moving at a speed of 45 km/h.

i.e, in 1 hour, the bus moves a distance of 45 km.

Since 1 hour = 60 minutes and 1 km =  \(10^{3}\) m, so, we may say that

In 60 minutes the bus moves a distance of 45 x \(10^{3}\) m.

Since 1 minute = 60 seconds,

So 1 hour = 60 x 60 s = 3600 s. Thus,

In 3600 s, the bus moves a distance of 45 x \(10^{3}\) m.

In 1 s, the bus moves a distance of  \(\frac{45 * 10^{3} }{3600} m\)

Simplifying the expression we get,

The bus moves at a speed of 12.5 m/s or 1.25 x \(10^{1}\)m/s.

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