A polarized light is incident on several polarizing disks whose planes are parallel and centered on common axis. Suppose that the transmission axis of the first polarizer is rotated 19 relative to the axis of polarization of the incident îight and tat î e ư n miss on aus of each additional analyzer is rotated 19° relative to the transmission axis of the previous one. What is the minimum number of polarizer needed whole number), so the transmitted light through all polarizing sheets has an intensity that is less than 18% that striking the first polarizer?

The acceleration of the center of mass is determined by the magnitude of the applied force and the mass of the roller, and is not affected by the radius of the roller or whether it is slipping.

The rate of change of velocity is defined as acceleration. It is defined as the change in velocity over time and is commonly measured in meters per second squared. Acceleration can occur in either a positive or negative direction. When velocity rises over time, it is said to be positive acceleration; when velocity drops over time, it is said to be negative acceleration.

The following equation gives the acceleration of the roller's center of mass:

a = F/m, where F is the applied force and m is the roller's mass.

When F = 140 N and m = 12 kg in this case, the acceleration of the center of mass is:

140 N/12 kg = 11.67 m/s2.

When a constant force of 140 N is applied, the roller's center of mass accelerates at a velocity of 11.67 m/s2. The acceleration will be directed in the same direction as the applied force.

The center of mass acceleration is unaffected by the radius of the roller or whether it is sliding or not. The acceleration is determined by the magnitude of the applied force and the mass of the roller.

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Answer: A skier’s most important piece of equipment is Ski boots.

Explanation: To find the answer, we need to know about the ski boots.

Thus, we can conclude that, a skier's most important equipment is Ski boots.

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Ski boots are a skier's most essential piece of gear.

We must understand the ski boots in order to determine the solution.

So, it stands to reason that ski boots are a skier's most essential piece of gear.

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Answer: y = 2.33

Explanation:

Given expression

15 - 3y = 8

Subtract 15 on both sides

15 - 3y - 15 = 8 - 15

-3y = -7

Divide -3 on both sides

-3y / -3 = -7 / -3

\(\boxed{y=2.33}\)

Hope this helps!! :)

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Answer:

In turn, the main factors affecting earthquake shaking intensity are earthquake depth, proximity to the fault, the underlying soil, and building characteristics—particularly height. Let's take a look at the latter two (soil and buildings) and how they interact.

The challenge in developing an accurate rating system for earthquakes is due to complicated relationship between variables such as magnitude and intensity of earthquake.

Earthquakes are associated with magnitude and intensity.

The challenge in developing an accurate rating system for earthquake is due to complicated relationship and dependency between the magnitude and intensity of the earthquake.

Thus, the challenge in developing an accurate rating system for earthquakes is due to complicated relationship between variables such as magnitude and intensity of earthquake.

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A decrease in potential energy means that the system is moving towards a more stable state, which means decrease in kinetic energy.

The system's kinetic energy can either increase, decrease, or stay the same depending on the specifics of the process.However, in general, a decrease in potential energy means that the system is moving towards a more stable state, which may correspond to a decrease in kinetic energy.

For example, if a ball rolls down a hill, its potential energy decreases while gravity does work on the ball, increasing its kinetic energy. However, if a spring is compressed, its potential energy decreases while an external force does work on the spring, but the kinetic energy of the spring remains constant.

Therefore, the change in kinetic energy depends on the specific details of the system and the process involved.

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Answer:

6.75m/s

Explanation:

using the second equation of motion, the time is calculated.

and with the formula a= (v - u)/t

where a is acceleration but in this case it's deceleration (and should be negated as you solve it ) .

v is final velocity

u is initial velocity

t is time taken

Answer:

The weight of the load can be calculated by using the principle of mechanical advantage of a lever. The mechanical advantage of a lever is the ratio of the force exerted on the load (F_L) to the force applied to the lever (F_A). In this case, the mechanical advantage of the lever is given by the ratio of the distance the load moves (0.2 m) to the distance the force is applied (1.2 m), or MA = 0.2/1.2 = 1/6.

So the force exerted on the load (F_L) is 6 times the force applied to the lever (F_A) and the weight of the load can be calculated as:

Weight of the load (F_L) = Mechanical advantage x Applied force (F_A)

F_L = (1/6) * 50 N = 8.33 N

So the weight of the load is 8.33 N.

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The tension in the inclined cable is  1,416.07 N and the tension in the horizontal cable is 1,132.85 N

Resolving Tension into its rectangular components,

we get,

The vertical component is Tsinθ

The horizontal component is Tcosθ

The vertical component is equal to the weight of the cat burglar,

It is given that θ = 34.6° and Weight (W) = 793 N

Now, Tsinθ = 793

Tsin34.6° = 793

T*0.56 = 793

T = 793/0.56 = 1,416.07 N

Hence, the tension in the inclined cable is  1,416.07 N

Now, the tension in the horizontal cable is  Tcosθ = 1,416.07cos34.6 = 1,416.07*0.8 = 1,132.85 N

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They have a limited supply in nature, therefore if they are used excessively, they will become exhausted.

Today, we recognise that using fossil fuels has a negative impact on the environment. Fossil fuels produce and utilise local pollutants, and their continued use permanently alters the temperature of our entire world.

Wastes from combustion sources are those that result from carbon pollution (i.e., coal, oil, natural gas). Included in this are all ash and particles taken out of the flue gas.

The fossile fuel is limited in nature. So, it should not waste energy from fossil fuels.

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Answer:

5 Electrons

Explanation:

Boron has 5 protons, 5 neutrons and 5 electrons. The atomic number (also known as the proton number) of Boron is 5 as it has 5 protons. It has a mass number of 10, as protons and neutron have a relative atomic mass of 1 each, and a neutral charge, as there are equal numbers of +1 protons and −1 electrons.

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The description of the measurement is incomplete, and therefore it is impossible to determine the type of error.

What is Measurement?

Measurement is the process of quantifying or determining the size, amount, or degree of something using standard units or scales. It involves assigning a numerical value to a physical quantity, property, or characteristic of an object, event, or phenomenon.

Measurement is a fundamental tool used in science, engineering, commerce, and everyday life. It allows us to make comparisons, establish standards, and assess the accuracy and precision of our observations and experiments. Some common examples of measurements include length, mass, time, and volume, which are typically expressed in units such as meters, kilograms, seconds, degrees Celsius, and liters, respectively.

The error described in this case is systematic error, also known as a bias. The stopwatch consistently measures time intervals that are either longer or shorter than the actual time.

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Answer:

The work done on the hose by the time the hose reaches its relaxed length is 776.16 Joules

Explanation:

The given spring constant of the of the spring, k = 88.0 N/m

The length by which the hose is stretched, x = 4.20 m

For the hose that obeys Hooke's law, and the principle of conservation of energy, the work done by the force from the hose is equal to the potential energy given to the hose

The elastic potential energy, P.E., of a compressed spring is given as follows;

P.E. = 1/2·k·x²

∴ The potential energy given to hose, P.E. = 1/2 × 88.0 N/m × (4.20 m)²

1/2 × 88.0 N/m × (4.20 m)² = 776.16 J

The work done on the hose = The potential energy given to hose, P.E. = 776.16 J

Answer:

\(\boxed {\boxed {\sf a=42.8 \ m/s^2}}\)

Explanation:

Acceleration can be found by dividing the change in velocity by the time.

\(a=\frac{v-u}{t}\) (v is the final velocity, u is the initial velocity, t is the time).

The velocity increased from 22 m/s to 236 m/s in 5 seconds. Therefore:

\(v=236 \ m/s\\u=22 \ m/s\\t= 5 \ s\)

Substitute the values into the formula.

\(a=\frac{236 \ m/s - 22 \ m/s}{5 \ s}\)

Subtract in the numerator.

\(a=\frac{214 \ m/s}{5 \ s}\)

Divide.

\(a=42.8 \ m/s^2\)

The acceleration of the object is 42.8 meters per square second.

Answer:

C is correct

Explanation:

The statement that best describes how the phase of the Moon changes from a full moon to a new moon is as follows:

Thus, the correct option for this question is C.

The different phases of the moon may significantly include the new Moon, waxing crescent, first quarter, waxing gibbous, full Moon, waning gibbous, third quarter, and waning crescent. This cycle of phase change of the moon repeats once a month.

The Earth completes its one rotation around the sun in 365.25 days. While the moon completes its one rotation around the Earth in 29.5 days.  The rotation of the moon around the earth leads to phase change of it. This is because when the moon rotates around the sun, it directly or indirectly causes its exposure to the sun where its phase changes.

In the diagram above, when there is a full moon, the earth is present between the sun and the moon. But when a new moon arises, the moon is present between the earth and the sun.

Therefore, the correct option for this question is C.

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Answer:

their masses and their distances from Mars

Explanation:

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The maximum value of the associated magnetic field for this electromagnetic wave is approximately 2.29 x 10^-11 T. The average energy density of the wave is approximately 1.65 x 10^-10 J/m³.

(a) To find the maximum value of the associated magnetic field for the electromagnetic wave, we use the relationship between the electric field (E) and magnetic field (B) in a vacuum: E = cB, where c is the speed of light (approximately 3 x 10^8 m/s).

Given E_max = 6.88 x 10^-3 V/m, we can calculate the maximum magnetic field (B_max) as follows:

B_max = E_max / c
B_max = (6.88 x 10^-3 V/m) / (3 x 10^8 m/s)
B_max ≈ 2.29 x 10^-11 T

So, the maximum value of the associated magnetic field for this electromagnetic wave is approximately 2.29 x 10^-11 T.

(b) To find the average energy density (u) of the electromagnetic wave, we use the formula:

u = (ε₀ / 2) * (E² + c² * B²), where ε₀ is the vacuum permittivity (approximately 8.85 x 10^-12 F/m).

Using the given values of E_max and B_max, we get:

u = (8.85 x 10^-12 F/m / 2) * ((6.88 x 10^-3 V/m)² + (3 x 10^8 m/s)² * (2.29 x 10^-11 T)²)
u ≈ 1.65 x 10^-10 J/m³

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The minimum angular velocity (in rpm) for swinging a bucket of water in a vertical circle without spilling any is 5.56 rpm.

The minimum angular velocity (in rpm) for swinging a bucket of water in a vertical circle without spilling any is given by the formula; Vmin=√g/R

where:

To express the answer in revolutions per minute, the radius of the circle must be converted to meters;R = 35 cm = 0.35 m

Substituting the values given above into the formula;

Therefore, the minimum angular velocity (in rpm) for swinging a bucket of water in a vertical circle without spilling any is 5.56 rpm.

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Answer:

1)  10 kg-m/s

2)  2 kg

3)  20 m/s

Explanation:

The momentum of an object can be calculated using the equation:

\(\large\boxed{p=mv}\)

where:

\(\hrulefill\)

For this question we need to find the momentum of a bowling ball whose mass is 4.0 kg is rolling at a rate of 2.5 m/s.

Given values:

Substitute the given values into the momentum formula and solve for p:

\(p=4.0\;\text{kg} \cdot 2.5\;\text{m/s}\)

\(p=10\;\text{kg m/s}\)

Therefore, the momentum of the bowling ball is 10 kg-m/s.

\(\hrulefill\)

For this question we need to find the mass of a skateboard rolling at a velocity of 3.0 m/s with a momentum of 6.0 kg-m/s.

Given values:

As we want to find mass, rearrange the momentum formula to isolate m:

\(\large\boxed{m=\dfrac{p}{v}}\)

Substitute the given values into the formula and solve for m:

\(m=\dfrac{6.0\; \text{kg m/s}}{3.0\; \text{m/s}}\)

\(m=2\;\text{kg}\)

Therefore, the mass of the skateboard is 2 kg.

\(\hrulefill\)

For this question we need to find the velocity of a baseball with a mass of 0.5 kg and a momentum of 10 kg-m/s.

Given values:

As we want to find velocity, rearrange the momentum formula to isolate v:

\(\large\boxed{v=\dfrac{p}{m}}\)

Substitute the given values into the formula and solve for v:

\(v=\dfrac{10\; \text{kg m/s}}{0.5\; \text{kg}}\)

\(v=20\;\text{m/s}\)

Therefore, the velocity of the baseball is 20 m/s.

Answer:

\(F_{grav}\) is a field force, as gravity does not physically apply force and does not require proximity.

Explanation:

Explanation:

So,

speed = wavelength x frequency

speed = 2.3 meters x 5 Hz => 11.5 meters per second

Therefore, the speed of the wave is 11.5 meters per second.

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Perfect question! So to start,

⇒ Concepts: Relative, Velocity

(Relative: - adjective- existing or having its specific nature only by relation to something else; not absolute or independent. -noun- something having, or standing in, some relation or connection to something else).

Velocity:

(1) Rapidity of motion or operation; swiftness; speed.

(2) The time rate of change of position of a body in a specified direction

(3) The rate of speed which something happens; rapidity of action or reaction.

Now, let's get onto relative velocity.

Assume you are operating a vehicle and pass another vehicle from behind. Actually, what happens is that the driver of the car behind you notices the one approaching from behind and ultimately turns around. Although the driver in front perceives it that way, the person on the ground does not see the automobile as driving backward. Relative velocity is what it is.

When riding in a car, bus, or train, you may see that numerous exterior objects are moving backward, including trees, buildings, and other objects. But are they actually regressing? No, you're very sure that the only thing moving while the trees are still on the ground is your car. What gives, therefore, that the trees seem to be going backward? Also, even if your fellow passengers are moving, they will look immovable to you since they are moving.

It's because you and your other passengers are moving in unison within your frame. It follows that you and the passengers are moving at the same speed. The trees are still, but you are moving. Trees are therefore moving relative to you and the other passenger at a certain speed. The velocity differential between you and the tree is that relative velocity.

Thank you,

Eddie

The kinematics to find the time to go from the office to the living room is: 2.81 s

Given Parameters

To find

Kinematics allows us to find the relationships between the position, velocity and acceleration of bodies, let's use the relationship  

             x = v₀ t + ½ a t²

Where x is the position, v₀ the initial velocity, at acceleration and t the time

In this case, as he leaves the office, the initial velocity is zero.

           x = ½ a t²

            t = \(\sqrt{\frac{2x}{a} }\)

Let's calculate

           t = \(\sqrt{\frac{2 \ 125}{4} }\)

          t = 2.81 s

In conclusion, using the kinematics, we find that the time to go from the office to the classroom is: 2.81 s

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Clara gave agreeable reason of  swinging back and forth of the boy on the tire.

According to the definition of centripetal force, this force is applied to an object moving curvilinearly and is targeted at the axis of rotation or the center of curvature. Newtons are used to measure centripetal force.

Since she is being affected by more than two forces at the bottom of the swing, There is also the centripetal force, which acts in the direction of the circle's center because she is rotating in a circle. In order to achieve zero net force, the tension must actually be smaller than the weight because the centripetal force and tension both point upward while the weight points downward. The weight is equal to the tension plus the centripetal force.

Hence, Clara gave agreeable reason.

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The correct option is B, a goodness-of-fit test with a computed value of chi-square = 1.273 and a critical value = 13.388, the appropriate conclusion would be to fail to reject H0.

Chi-square is a statistical test used to determine the association between two categorical variables. It is commonly used in hypothesis testing to determine whether the observed data deviates significantly from the expected data.

The test works by comparing the observed data with the expected data, which is calculated assuming that there is no association between the two variables being tested. The difference between the observed and expected data is squared, and then divided by the expected data. This process is repeated for all categories in the variables being tested. The sum of these values gives the chi-square statistic. The chi-square statistic is compared to a critical value from a chi-square distribution with degrees of freedom equal to the number of categories minus one.

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The voltage that is required to run the train is found to be 12V.

Since the transformer has 600 turns in the primary coil and 60 turns in the secondary coil, the turns ratio is 600:60, which simplifies to 10:1. To find the voltage required to make the train run, we need to use the turns ratio equation,

Vp/Vs = Np/Ns, The voltages of the primary and secondary coils are Vp and Vs, respectively. The primary coil has Np turns, while the secondary coil has Ns turns.

We know that the household voltage supplied to the train is 120 V, which is the voltage in the primary coil (Vp). We want to find the voltage in the secondary coil (Vs). Substituting the values we know into the turns ratio equation, we get,

120/Vs = 10/1

Simplifying this equation, we get,

Vs = 12 V

Therefore, the voltage required to make the train run is 12 V.

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Answer:

Explanation:

1. It is greater than the energy absorbed in breaking the bonds. The excess is converted to thermal energy.

2. The nuclei and electrons of the atoms are attracted to each other

3. thermal energy

4. II and III only

5. It converts to thermal energy.

The net force acting on the two (2) kids is equal to 180 Newton.

Given the following data:

To determine the net force acting on the two (2) kids:

First of all, we would calculate the total mass of the two (2) kids:

\(Total\;mass = 50+40\)

Total mass = 90 kg.

In this exercise, you're required to calculate the magnitude of the net force that is acting on these two (2) kids running down the hall. Thus, we would apply Newton's Second Law of Motion.

Mathematically, Newton's Second Law of Motion is given by this formula;

\(Net\;force = mass \times acceleration\)

Substituting the given parameters into the formula, we have;

\(Net\;force = 90 \times 2\)

Net force = 180 Newton.

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Answer: I think layered cake.. if I’m wrong sorry

Explanation:

I guessed