Which statement is a scientifically accurate description of velocity?


The motorcyclist traveled along a highway at 55 mph and reached the campsite in less than the two-hour estimated time.


Walking south along the two-mile canyon trail generally takes less time than traveling the same trail north because walking south is all downhill.


The hiker began hiking the park's five-mile north hiking trail at 8:00 a.m. with plenty of daylight left to complete the hike before dark.


The boat traveled from the dock north to the 200-meter marker in the bay in less than 5 minutes, giving the passengers several more hours to fish.

Answer:

90.15K

Explanation:

The formula is x°C + 273.15 = yK

Answer:

(-183°C) = 90.15K

Explanation:

-183°C is given

Now,

K = °C + 273

K = (-183) + 273.15

K = 90.15

Thus, (-183°C) = 90.15K

-TheUnknownScientist

It is false that peripheral vision is what you see when you turn your head to the left or right.

The statement is false. Peripheral vision is the ability to see objects and movement outside of the direct line of vision, without having to turn the head or move the eyes. It is part of our vision that extends beyond the center of our gaze and is crucial for detecting motion and objects in our surroundings. When we turn our head to the left or right, we are actually using our central vision to focus on objects in our new line of sight, not our peripheral vision. Our central vision is responsible for providing detail and color vision, while our peripheral vision is more sensitive to movement and changes in light and dark. So, when we turn our head, we are using both our central and peripheral vision to perceive our surroundings.

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A system of laws is held to a standard by fundamental law, also known as organic law.

The majority of state and federal constitutions are regarded as prime instances of basic law. A system of fundamental laws lays out the guiding principles upon which all other laws must be based.

This type of law is employed in a constitution to establish the fundamental categories of rights and obligations for both citizens and the government.

For instance, the US Constitution outlines some of the most important rights of US citizens while also granting the government both powers and constraints.

Therefore, A system of laws is held to a standard by fundamental law, also known as organic law.

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Locating stars hidden by nebulae that would typically obscure other stars.

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Option D from the following is the solution concentration expressed in terms of mortality because it represents the number of moles dissolved in a liter of the solution.

A chemical compound is a combination of two or more either similar or dissimilar chemical elements.

The molarity of a solution is expressed in terms of the number of moles dissolved per liter of the solution.

The number of moles dissolved in a liter of the solution, represented by option D from the following, is the solution concentration stated in terms of mortality.

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the maximum size of fuse permitted in a single phase is 18.75 ampere.

POWER = amount of energy transferred per unit time.

Power = voltage x current

power = 4500 volt-ampere

voltage = 240 volt

current = power/voltage

       = 4500/240

      = 18.74 ampere

the maximum size of fuse permitted in a single phase is 18.75 ampere.

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The margin of error for the given sample of 150 students is 1.38.

To find the margin of error, we first need to determine the critical value for a 90% confidence interval. Since we have a large sample size (n=150), we can use the Z-distribution. From a Z-table or calculator, we find that the critical value for a 90% confidence interval is 1.645.

Next, we can use the formula for margin of error:
Margin of error = critical value * (standard deviation / square root of sample size)
Plugging in the values, we get:

Margin of error = 1.645 * (10.3 / sqrt(150))
Margin of error = 1.645 * 0.842
Margin of error = 1.38 (rounded to two decimal places)

Therefore, the margin of error for the given sample is 1.38. This means that we can be 90% confident that the true average test score for the entire school is within 1.38 points of the sample average of 86.28.

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The magnitude of the force F is 4.8 N.

The frictional force is the force that tends to oppose the relative motion between two surfaces in contact.

We must recall that;

μ= F/R

When R = W cos θ

So;

μ= F/W cos θ

μ= coefficient of friction

F = force acting on the crate

W = weight of the crate

0.2 = F/27.76 cos 30

F = 0.2 × 27.76 cos 30

F = 4.8 N

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sis i love the eren season 1-2-3-4 but the eren season 5?....... i just :')

Answer:

Explanation:

Aaron yogurt supremacy

The magnitude of the electric field between the plates is 1.25 x × 10⁴ N/C.

Electric field - Every point in space where a charge, in any form, is present has an electric property that is called an electric field.

The magnitude of the electric field strength is given as :

E = F/q

where

E = electric field

F = electrostatic force

q = charge

electron experiences a force of as it accelerates between two metal plates =  2 x 10⁻¹⁵ N

Charge of the electron,

q = 1.6 × 10⁻¹⁹ C

Then

E = (2 x 10⁻¹⁵ N)÷(1.6 × 10⁻¹⁹ C)

E = 1.25 x × 10⁴ N/C.

The magnitude of the electric field between the plates is 1.25 x × 10⁴ N/C.

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Answer:

\(60^{\circ}\) (assuming that air resistance is negligible.)

Explanation:

Let \(g\) denote the gravitational field strength. If air resistance on the projectile is negligible:

Let \(\theta\) denote the angle at which the projectile is launched. Let \(v\) denote the initial velocity of the projectile:

Also because air resistance is negligible, vertical velocity of the projectile will be \(v_{y} = (-u_{y}) = (-v\, \sin(\theta))\) right before the projectile lands. In other words, while the projectile was in the air, the change in vertical velocity would be \((-v\, \sin(\theta)) - (v\, \sin(\theta)) = (-2\, v\, \sin(\theta))\).

Divide the change in velocity by acceleration to find the duration of the flight:

\(\begin{aligned}t &= \frac{v_{y} - u_{y}}{a_{y}} \\ &= \frac{(-v\, \sin(\theta)) - (v\, \sin(\theta))}{(-g)} \\ &= \frac{(-2\, v\, \sin(\theta))}{(-g)} \\ &= \frac{2\, v\, \sin(\theta)}{g}\end{aligned}\).

Range measures the horizontal distance that this projectile has travelled. At a constant horizontal velocity of \(u_{x} = v\, \cos(\theta)\), this projectile would travel a distance of:

\(\begin{aligned}(\text{range}) &= u_{x}\, t \\ &= (v\, \cos(\theta))\left(\frac{2\, v\, \sin(\theta)}{g}\right) \\ &= \frac{2\, v^{2}\, \sin(\theta)\, \cos(\theta)}{g}\end{aligned}\).

Apply the double angle identity \(2\, \sin(\theta) \, \cos(\theta) = \sin(2\, \theta)\) to further simplify this expression:

\(\begin{aligned}(\text{range}) &= \cdots \\ &= \frac{2\, v^{2}\, \sin(\theta)\, \cos(\theta)}{g} \\ &= \frac{v^{2}\, (2\, \sin(\theta)\, \cos(\theta))}{g} \\ &= \frac{v^{2}\, \sin(2\, \theta)}{g}\end{aligned}\).

Note that in this question, \(v^{2}\) and \(g\) are both constant. Hence, for another angle of elevation \(\hat{\theta}\), the range of the projectile will be the same as long as \(\sin(2\, \hat{\theta}) = \sin(2\, \theta)\).

\(\sin(2\, \hat{\theta}) = \sin(2\, (30^{\circ}))\).

Since \(0^{\circ} \le \hat{\theta} \le 90^{\circ}\), \(0^{\circ} \le 2\, \hat{\theta} \le 180^{\circ}\):

\(\sin(2\, \hat{\theta}) = \sin(180^{\circ} - 2\, \hat{\theta}) = \sin(2\, (90^{\circ} - \hat{\theta}))\).

Therefore, \(\hat{\theta} = 90^{\circ} - \theta = 90^{\circ} - 30^{\circ} = 60^{\circ}\) will ensure that \(\sin(2\, \hat{\theta}) = \sin(2\, \theta)\). Launching the projectile at \(60^{\circ}\) will reach the same range.

\(\begin{aligned}(\text{new range}) &= \frac{v^{2}\, \sin(2\, (60^{\circ}))}{g} \\ &= \frac{v^{2}\, \sin(2\, (30^{\circ}))}{g} = (\text{original range})\end{aligned}\).

Answer:

decomposers break down waste to yield ammonia.

Explanation:

The nitrogen cycle is the process by which nitrogen circulates among the atmosphere, terrestrial, and marine ecosystems and is converted into multiple chemical forms through both biological and physical processes.

In the nitrogen cycle, decomposers do not break down waste to yield ammonia.

So, the option ''decomposers break down waste to yield ammonia'' is correct.

A box of mass 4.1 kg is supported above the ground by two forces. If F1=7.0 N and ϕ=0.0∘, F1=7.0 N,ϕ=0.0 ∘, mass of box m = 4.1 kg and acceleration due to gravity g = 9.81 m/s2.

We need to calculate the magnitude of F2 in Newtons.As per the question, we have:Now, we can use the equation as mentioned below:Therefore, the magnitude of F2 is 39.93 N (approx) in Newtons.

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42 Joules energy is gained by the block. This can be solved by using the concept work done formula.

The product of a force and the distance it is applied across is what is referred to as the work done. An item moves across space when a force is applied to it, which is referred to as doing work. By applying a force across a distance, such as when you lift a burden, you are performing labor.

A force delivered over a distance to an item causes work to be done. Thus, an object's total energy will be impacted when a force is applied to it across a distance.

Given that,

a force of 6.0 Newtons is applied to a block at rest on a horizontal friction less surface over a 7.0 meter span.

The parameters given are:

Distance covered = 7.0 m

The force = 6.0 N

The formula for work done is the product of force and distance. That is,

Work done = force × distance

Where work done is the same as energy.

So, Energy = force × distance

or, Energy = 6.0 N × 7.0 m

or, Energy = 42 Joules.

Therefore, the energy gained by the block is 42 Joules.

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Answer:

Free body diagram

Answer:

17.565 kgm/s

Explanation:

Momentum = mass × velocity

I = mv..................... Equation 1

But we can calculate the value of v  using the equation of motion under gravity.

v² =  u²+2gs............. Equation 2

Where u = initial velocity, s = maximum heigth, g = acceleration due to gravity.

Given: u = 0 m/s (at the maximum heigth), s = 7.0 m.

Constant: g = 9.8 m/s²

Substitute these values into equation 2

v² = 0²+ 2×7×9.8

v² = 137.2

v = √137.2

v = 11.71 m/s.

Also given: m = 1.50 kg

substitute these values into equation 1

Therefore,

I = 1.5×11.71

I = 17.565 kgm/s

Answer:

Part A

The ammeter reading for the current flowing through the second bulb, in the third circuit is 0.43 A

Part  B

The ammeter reading for the total current coming from the cell is 0.86 A

Explanation:

The given electric circuit schematics includes;

The number of bulbs in each circuit = 2 bulbs

The number of ammeter in each circuit = 1 ammeter

The number of cells in each circuit = 1

Each circuit have identical bulbs, cells and ammeters

Part A

Ammeter reading for the third circuit

The given reading for the total current going to the cell, \(I_T\) = 0.86 A

The reading for the current flowing through one of the bulbs, I₁ = 0.43 A

Therefore, given that the bulbs are arranged in parallel, and the bulbs have identical resistance, 'R', the current flowing in the second bulb, I₂, is given by the current divider rule as follows;

\(I_2 = \dfrac{R}{R + R} \times I_T = \dfrac{R}{2 \cdot R} \times I_T = \dfrac{1}{2} \times I_T\)

∴ The ammeter reading for the current flowing through the second bulb, in the third circuit I₂ = (1/2) × (0.86 A) = 0.43 A

Part B

Ammeter reading for the third circuit

The total current coming from the cell = The current passing through the bulbs = I₁ + I₂

The ammeter reading for the total current coming from the cell = 0.43 A + 0.43 A = 0.86 A = \(I_T\)

The mass and spring were pulled down 0.122 m from their original equilibrium position before being released.

Let's start by using Hooke's Law, which states that the force exerted by a spring is proportional to its displacement from its equilibrium position. Mathematically, we can express this as

F = -kx

where F is the force exerted by the spring, x is the displacement from the equilibrium position, and k is the spring constant.

We can use this equation to find the spring constant, k. We know that when a 2.0 kg mass is connected to the spring, the new equilibrium position is 5.0 cm lower. So, the displacement of the spring from its original equilibrium position is

x = 5.0 cm = 0.05 m

The force exerted by the spring is equal to the weight of the mass, which is

F = mg = (2.0 kg)(9.81 m/s^2) = 19.62 N

Using Hooke's Law, we can write

19.62 N = -k(0.05 m)

Solving for k, we get

k = -392.4 N/m

Now, let's consider the motion of the mass after it is pulled down and released. We know that at the equilibrium position, the net force on the mass is zero, so the kinetic energy of the mass is converted entirely into potential energy stored in the spring. Therefore, we can write

1/2 mv^2 = 1/2 kx^2

where m is the mass of the object (which we know is 2.0 kg), v is the speed of the mass when it passes the original equilibrium position (which we know is 2.1 m/s), x is the displacement of the spring from its original equilibrium position when the mass is released (which we want to find), and k is the spring constant (which we just calculated).

Plugging in the values we know and solving for x, we get

x = sqrt((mv^2)/k) = sqrt((2.0 kg)(2.1 m/s)^2/(392.4 N/m)) = 0.122 m

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Answer:

2

Explanation:

H2O has -

2 hydrogen atoms

1 oxygen

Answer: 2

Explanation:

The receiver of a signal must understand the code or language being used to avoid confusion and losses.

This is usually in the form of a sound or body movement and is involved in conveying messages to people.

The receiver must understand the code or language in order to prevent confusion or loss of lives and properties.

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The linear velocity of the wheel is 16 m/s.

Linear velocity is the rate of change of displacement with regard to time when the object is moving in a straight line

To calculate the linear velocity of the wheel, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, The linear velocity of the wheel is 16 m/s.

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Answer:

no such thing i dont think

Explanation:

Answer:

Polygraph tests are used to determine whether someone is lying or not, and display the physical signs someone is showing when they speak to be interpreted. Polygraphs measure things like heartbeat, breathing rate, and electrical conductivity of the skin, which are signs that get more and more severe when someone tells major lies or lies a lot. Polygraph tests are pretty unreliable because everyone shows different reactions to speaking depending on how anxious they are or any other medical condition, which could falsely incriminate them, but I think it is still important to determine the signs someone displays to use as a datapoint later on in the trial. For those reasons, they should still be used but shouldn't be relied on as heavily.

Explanation:

The minimum gap between the automobiles is 16.9 feet, according to the supplied statement, in order to prevent a collision.

The size or extent of the displacement between two points is referred to as distance. Keep in mind that perhaps the difference between two and indeed the distance travelled between them are not the same. The length of the entire journey taken to go from one point to another is the distance travelled.

For B;

\(\begin{aligned}(\rightarrow) \quad v & =v_0+a_c t \\v_B & =60-12 t \\(\rightrightarrows) & s=s_0+v_0 t+\frac{1}{2} a_c t^2 \\s_B & =d+60 t-\frac{1}{2}(12) t^2\end{aligned}\)

For A;

\(\begin{aligned}& (\stackrel{\rightarrow}{\rightarrow}) \quad v=v_0+a_c t \\& v_A=60-15(t-0.75), \quad[t > 0.75] \\& (\text { 土 }) \quad s=s_0+v_0 t+\frac{1}{2} a_c t^2 \\& \qquad s_A=60(0.75)+60(t-0.75)-\frac{1}{2}(15)(t-0.75)^2, \quad[t > 0.74]\end{aligned}\)

Require \(V_{A} = V_{B}\) the moment of closest approach

60 - 12t = 60 - 15 ( t- 0.75)

t = 3.75 s

The worst case scenario without contact is when \(S_{A} = S_{B}\)

At t = 3.75 s, from eq. (1) and (2),

60(0.75) + 60(3.75 - 0.75) - 7.5(3.75 - 0.75)² = d + 60(3.75) = 6(3.75)²

157.5 = d + 140.62

d = 16.9 ft

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Answer:

To differentiate the two concepts each colour represents (perhaps)

Explanation:

Where is the map?

Answer:

such as green representing forested land and blue representing waterways.

The monthly energy cost to run the refrigerator is approximately $7.02.

To determine the monthly energy cost to run a refrigerator, we need to know the power consumption of the refrigerator and the number of hours it operates per month.

The power consumption of the refrigerator is usually stated in watts (W). If you know the power consumption in watts, you can convert it to kilowatts (kW) by dividing by 1000.

Let's assume the power consumption of the refrigerator is 100 watts (0.1 kW), and it operates for an average of 24 hours per day. In a month, there are typically 30 days.

To calculate the energy consumption in kilowatt-hours (kWh) per month, multiply the power consumption in kilowatts by the number of hours of operation per month:

Energy consumption = Power consumption (kW) x Operating hours per month

Energy consumption = 0.1 kW x 24 hours/day x 30 days

Energy consumption = 72 kWh

Now, we can calculate the cost of energy for running the refrigerator. Since electricity rates range from 8 cents/kWh (winter) to 11.5 cents/kWh (summer), we'll use an average rate of 9.75 cents/kWh for this calculation.

Monthly cost = Energy consumption (kWh) x Electricity rate (cents/kWh)

Monthly cost = 72 kWh x 9.75 cents/kWh

Monthly cost ≈ $7.02

Therefore, the monthly energy cost to run the refrigerator is approximately $7.02.

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The object's speed reaches a maximum value and stays there if you drop it and it falls far enough for this to occur.

The speed of an object, also known as v in kinematics, is a scalar quantity that refers to the size of the change in that object's position over time or the size of the change in that object's position per unit of time.  An object's average speed during a period of time is calculated by dividing its distance traveled by the length of the interval, the instantaneous speed is the maximum possible speed as the interval's duration gets closer to zero. Velocity and speed are different concepts.

Distance divided by time is the dimension of speed. Although the meter per second (m/s), the SI measure of speed, is the most often used unit of speed.

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