Here we have tapering (old fashioned) car antenna made of steel (e= 2 1011[nm2]).measuringxas the distance from the attachment point on the car:

Answer:

c

Explanation:

Answer:

Distancia = 50.04 metros

Explanation:

Dados los siguientes datos;

Velocidad = 10 km/h

Tiempo = 18 segundos

Para encontrar la distancia;

Conversión:

10 km/h = 10 * 1000/3600 = 2.78 m/s

Distancia = velocidad * tiempo

Distancia = 2.78 * 18

Distancia = 50.04 metros

Por lo tanto, el tren viajaría 50.04 metros antes de detenerse por completo.

Answer:

yes

Explanation:

yes

Answer:

The kettle used more electrical energy

Explanation:

We need to find the appliance that used more electrical energy.

To solve this problem, we need to find the amount of electrical energy used by both appliances.

For the kettle;

 Power consumed  = 3kW

  Time  = 4minutes

    Electrical energy  = Power x time

    Convert 4min to hr;

              60min  = 1hr

               4min   = \(\frac{4}{60}\)   = \(\frac{1}{15}\)hr

  Electrical energy  = 3 x  \(\frac{1}{15}\) = 0.2kwh

For the fridge;

  Power consumed  = 150W = 0.15kW

   Time  = 1hr

     Electrical energy  = 0.15kW x 1hr = 0.15kWh

Force of gravity = mg = 8.35 * 9.8 = 81.83 N

normal force (N) = 81.83 N

force of friction =   30.69 N

Applied force = 119.2 N

net force = 88.51 N

given

mass = 8.35 kg

acceleration = 10.6 \(m/s^{2}\)

coefficient of friction (mu) = 0.375

force of gravity = mg = 8.35 * 9.8 = 81.83 N

normal force (N) = 81.83 N ( as mg = N )

force of friction = mu * normal = 0.375 * 81.83 = 30.69 N

F net = 0

applied force - force of friction = mass * acceleration

F - fr = ma

F = ma + fr

  = 8.35 * 10.6 + 30.69

  = 119.2 N

net force = F - fr = ma = 8.35 *  10.6

               = 88.51 N

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It is true that we can only perform ideal calculations under normal pressure and temperature.

The nominal air temperature at sea level are referred to as STP, or normal temperature and pressure. The conditions are 0 °C and 1 atmosphere of pressure, respectively.

It is now simpler to compare various measures for gasses, such as the number of molecules of gas in a certain volume. For scientists to be able to compare different sets of data in a meaningful way, a global standard for temperature and pressure must be established.

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The strength of an electromagnet's magnetic field can be increased by the following below:

A. Increasing the amount of current flowing through the wire

B. Increasing the number of coils packed close together

D. Increasing the thickness of the coils.

This is referred to as a region around a magnetic material or a moving electric charge within which the force of magnetism acts.

Increasing the number of coils packed close together or the thickness will increase the strength of an electromagnet's magnetic field because each coil has its own magnetic field, so the more coils will increase it thereby making it the correct choices.

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Answer:

1. Motion

2. Empty space

3. Far apart

4. Independently

5. Random or rapid

6. Collision

7. Kinetic energy

8. Atmospheric

9. 273 Kelvin or 0° Celsius

10. 1 atm, 101.3 kPa or 760 mmHg

Explanation:

In science, matter can be defined as anything that has mass and occupies space. Any physical object that is found on earth is typically composed of matter. Matter are known to be made up of atoms and as a result has the property of existing in states.

Generally, matter exists in three (3) distinct or classical phases and these are;

I. Gas.

II. Solid.

III. Liquid.

Filling the missing words or texts in the question, we have;

The kinetic theory describes the motion of particles in matter and the forces of attraction between them. The theory assumes that the volume occupied by a gas is mostly empty space, that the particles of gas are relatively far apart, move independently of each other, and are in constant random or rapid motion. The collision between particles are perfectly elastic so that the total kinetic energy remains constant. Gas pressure results from the simultaneous collisions of billions of particles with an object. Barometers are used to measure atmospheric pressure. Standard conditions are defined as a temperature of 273 Kelvin or 0° Celsius and a pressure of 1 atm, 101.3 kPa or 760 mmHg.

The correct matching of the terms is as follows:

The correct matching to the given terms depends on the definition of the terms.

The correct matching of the terms is as follows:

In conclusion, respiratory function is measured by means of aerobic capacity.

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Answer:

Explanation:

The force acting on an object given it's mass and acceleration can be found by using the formula

force = mass × acceleration

From the question we have

force = 6 × 3

We have the final answer as

Hope this helps you

The work done by both students will be equal. Jaci has greater power than Kyli.

Work can be explained as the energy needed when a force is exerted to move an object through a particular displacement. The work done depends upon the displacement and applied force of the object.

W= F × d

Where 'F' represents the exerted force and 'd' represents the displacement.

The power can be described as the rate of doing work and is the work done in unit time.  The mathematical formula for power can be represented as mentioned below.

Power = Work/time = W/t

As the mass of the box is equal and both cover the same distance so the work done by both students will be equal. The time taken by both students is different. Therefore, the power will be different.

More the time is taken, the lesser the power. Therefore, Jaci has greater power than Kyli.

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The CRO (Cathode Ray Oscilloscope) will display a triangular wave that is vertically stretched and horizontally compressed.

The vertical deflection plates will cause the triangular wave to be displayed with a peak-to-peak amplitude of\(100 cm (50 V * 0.1 cm/V)\), while the horizontal deflection plates will cause  sawtooth wave to be displayed with a peak-to-peak amplitude of \(5000 cm (100 V * 0.02 cm/V).\) The synchronization of the two inputs will ensure that the triangular wave and the sawtooth wave are displayed in a coordinated manner, with each cycle of the sawtooth wave corresponding to five cycles of the triangular wave. The resulting display will show a pattern of diagonal lines that gradually rise and then quickly drop back to the starting position, with each line representing a cycle of the sawtooth wave.

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Answer: Therefore, the instantaneous speed is only the answer, because, the detector can only detect the instantaneous speed but not the average speed.

Explanation:

Given that the number of hailstones is n = 562

The mass of hailstone is m = 2 g = 0.002 kg

The speed of hailstone is v = 5.8 m/s

The time taken will be t = 92 s

The angle is

We have to calculate the force.

The force can be calculated by the formula

Substituting the values, the force will be

The description of the experiment needed for this is to make use of a string, suspend the weight, and then find the distance between the support and the center of mass of the knife-edge weight system

To determine the weight of the item utilizing the provided equipment, my proposed method involves executing a straightforward test in a subsequent manner:

Fix one end of the string to the item and fasten the other end to the blade's tip.

Horizontally position the knife edge onto a support to achieve balance.

Suspend the 100 g weight from the blade's tip using the string.

Using a meter rule, determine the distance between the support and the center of mass of the knife-edge weight system.

Remove the burden and substitute it with the item.

Rearrange the location of the item on the string until equilibrium is restored to the knife-edge weight mechanism.

Calculate the fresh extension between the support and the system's center of mass.

By applying the principle of moments, determine the weight of the object with respect to the known weight and the proportion of distances.

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Explanation:

It is given that,

Initial speed of a golfer, u = 29 m/s

If it travels the maximum possible distance before landing. It means that it is projected at an angle of 45 degrees.

(a) We need to find the time spent by the ball in the air. It can be calculated by using second equation of motion.

\(s=ut+\dfrac{1}{2}at^2\)

Here,

a = -g

s = 0 (it is displacement and it is equal to 0 as the ball lands on the green).

So,

\(0=29\sin(45)t-\dfrac{1}{2}\times 9.8t^2\ (\text{Initial vertical component of velocity is taken})\\\\-4.9t^2+29\times \dfrac{1}{\sqrt2}t=0\\\\-4.9t^2+20.5t=0\\\\t=0,4.184\ s\)

So, it will take 4.184 seconds in the air.

(b) let x is the longest hole in one that the golfer can make if the ball does not roll when it hits the green. It can be given by :

\(x=vt\cos\theta\\\\x=29\times 4.184\times \cos(45)\\\\x=85.79\ m\)

Hence, this is the required solution.

Answer:

111.1 meters flown from bat

Explanation:

So one bike is going at 8m/s and the other bike is going at 10m/s in the direction towards the other bike. So we can make one bikes velocity =0 and the other we add the velocities together to get V of bike a = 18m/s while velocity of bike b =0m/s. Then we use the distance apart to find the time. so we take our average velocity formula and rearrange it to time = displacement/average velocity. This gives t = 100/18=5.55secs. We then take the bats velocity to find to the distance traveled. 5.55secs = x/20m/s. We just cross multiply to get 111.1 repeating which we just say is 111.1m traveled from the bat.

The distance traveled by the bat before the two bikes meet is 1,000 m.

The time taken for the bikes to meet or intersect each other is calculated as follows;

(Va - Vb)t = d

where;

(10 m/s - 8 m/s)t = 100 m

2 m/s (t) = 100 m

t = 100 m / 2 m/s

t = 50 seconds

Distance = average speed x time

Distance = 20 m/s x 50 s

Distance = 1,000 m

Thus, the distance traveled by the bat before the two bikes meet is 1,000 m.

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The frequency of the emergency lights that you observe will be slightly higher at 5.821 1014 Hz due to the Doppler effect caused by the relative motion between the source and the observer.

In the Great Space Race, if the person in front of you turns on emergency lights that emit at a frequency of 5.820 1014 Hz and is traveling 2694 km/s faster than you, the frequency of the lights that you observe will be slightly different due to the Doppler effect. This effect causes the frequency of a wave to change when there is relative motion between the observer and the source of the wave.
To calculate the observed frequency of the lights, we can use the following equation:
f' = f × (c ± v) / (c ± vs)
Where f is the frequency of the lights as emitted by the source, v is the velocity of the source relative to the observer, c is the speed of light, and vs is the velocity of the observer.
Plugging in the given values, we get:
f' = 5.820 1014 Hz × (c + 2694 km/s) / (c - v)
Assuming that the observer (you) is not moving, we can simplify this equation to:
f' = 5.820 1014 Hz × (c + 2694 km/s) / c
Solving for f', we get:
f' = 5.820 1014 Hz × (299792458 + 2694000) / 299792458
f' = 5.821 1014 Hz (rounded to three significant figures)

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Answer:

*Answers are in their respective order with the questions.

\(1500\:\mathrm{J},\\4500\:\mathrm{J},\\5.52\:\mathrm{m}\)

Explanation:

The [gravitational] potential energy of an object is given by \(PE=mgh\), where \(m\) is the mass of the child, \(g\) is acceleration due to gravity, and \(h\) is the height of the object (relative to the ground).

"If the mass of the boy is tripled, how much potential energy does the child have at the top of his jump?"

Without actually plugging and chugging, notice the formula in which gravitational potential energy is given. Potential energy is directly proportional to mass. Therefore, if the mass of the boy is tripled, his potential energy will also be tripled, yielding an answer of \(500\cdot 3=\boxed{1500\:\mathrm{J}}\)

"If the same boy's mass is doubled, but his height is quadrupled, how much potential energy does the child have at its maximum and in what position in the jump will he be?"

In similar fashion to the first question, we can note that the potential energy of an object is directly proportional to its mass and height. Therefore, if the boy's mass is doubled and his height is quadrupled, his potential energy will be \(2\cdot 4=8\) times as large at maximum height. Thus, he will have \(500\cdot 8 =4,000\:\mathrm{J}\) of potential energy at the maximum height. I'm assuming that "in what position in the jump will he be?" is asking for the height at the maximum height of the jump.

The original height can be solved using:

\(PE=mgh,\\500=37\cdot 9.8\cdot h,\\h=\frac{500}{37\cdot 9.8}=1.37892995036\:\mathrm{m}\)

Quadrupled implies being multiplied by four. Therefore, we have:

\(h'=1.37892995036\cdot 4=5.51571980143\approx \boxed{5.52\:\mathrm{m}}\)

Answer: Concentration of H+ =10^-7; log of 10^-7=7 so pH=7

Explanation:

Answer:

50 [m/s].

Explanation:

1) formula is: V-V₀=g*t, where V₀ - final velocity (it is 0), V - required initial velocity, g≈10 [m/s²] and t - elapsed time.

2) according to the formula above:

V=g*t; ⇒ V=5*10=50 [m/s].

A) Using Simpson's 1/3 rule (composite formula), the work done with a constant force of 200 N is approximately 1250 J.

B) Using the MATLAB function trapz, the work done is approximately 7750 J.

Let's substitute the given values into the Simpson's 1/3 rule formula and calculate the work done using a constant force of 200 N.

A) Force (F) = 200 N (constant for all t)

Velocity (v) = 4t (0 ≤ t ≤ 5) and v = 20 + (5 - t)² (5 ≤ t ≤ 15)

Step size (h) = 0.25

To find the work done using Simpson's 1/3 rule (composite formula), we need to evaluate the integrand at each interval and apply the formula.

Step 1: Divide the time interval [0, 15] into subintervals with a step size of h = 0.25, resulting in 61 equally spaced points: t0, t1, t2, ..., t60.

Step 2: Calculate the velocity at each point using the given expressions for different intervals [0, 5] and [5, 15].

For 0 ≤ t ≤ 5: v = 4t For 5 ≤ t ≤ 15: v = 20 + (5 - t)²

Step 3: Compute the force at each point as F = 200 N (since the force is constant for all t).

Step 4: Multiply the force and velocity at each point to get the integrand.

For 0 ≤ t ≤ 5: F * v = 200 * (4t) For 5 ≤ t ≤ 15: F * v = 200 * [20 + (5 - t)²]

Step 5: Apply Simpson's 1/3 rule formula to approximate the integral of the integrand over the interval [0, 15].

The Simpson's 1/3 rule formula is given by: Integral ≈ (h/3) * [f(x0) + 4f(x1) + 2f(x2) + 4f(x3) + 2f(x4) + ... + 4f(xn-1) + f(xn)]

Here, h = 0.25, and n = 60 (since we have 61 equally spaced points, starting from 0).

Step 6: Multiply the result by the step size h to get the work done.

Work done: 1250 J

B) % Define the time intervals and step size

t = 0:0.25:15;

% Calculate the velocity based on the given expressions

v = zeros(size(t));

v(t <= 5) = 4 * t(t <= 5);

v(t >= 5) = 20 + (5 - t(t >= 5)).^2;

% Define the force value

F = 200;

% Calculate the work done using MATLAB's trapz function

\(work_t_r_a_p_z\) = trapz(t, F * v) * 0.25;

% Display the result

disp(['Work done using MATLAB''s trapz function: ' num2str(\(work_t_r_a_p_z\)) ' J']);

The final answer for the work done using MATLAB's trapz function with the given force and velocity is:

Work done using MATLAB's trapz function: 7750 J

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The temperature at which the root-mean-square speed of oxygen molecules would be 393 m/s is approximately 74.87 °C with a margin of error of +/- 0.75 °C.

T = mv(rms)^2 / (3k)

Substituting the given values, we get:

T = (0.329 kg/mol) * (393 m/s)^2 / (3 * 1.38 x 10^-23 J/K)

T = 3196.23 K

Converting to Celsius:

T = 3196.23 K - 273.15 = 2923.08 °C

Rounding to the nearest hundredth and applying the margin of error of +/- 1%, we get:

T = 74.87 ± 0.75 °C

Temperature is a measure of the average kinetic energy of the particles in a system. Kinetic energy is the energy of motion, and the more motion there is, the higher the temperature. Temperature is usually measured in degrees Celsius (°C) or Fahrenheit (°F), or in the SI unit of Kelvin (K).

At the microscopic level, the temperature is related to the random motion of atoms and molecules in a substance. When two objects are in contact, heat energy can flow from the hotter object to the cooler object until they reach thermal equilibrium, where their temperatures are equal. The amount of heat energy transferred depends on the temperature difference between the objects and their thermal conductivities.

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Answer:

Objective Lenses: Usually you find 3 or 4 objective lenses on a microscope. They almost always consist of 4x, 10x, 40x and 100x powers, when coupled with a 10x (most common) eyepiece lens, total magnification is 40x (4x times 10x) 100x, 400x and 1000x

Explanation:

Objective lenses come in various magnification powers, with the most common being 4x, 10x, 40x, and 100x, also known as scanning, low power, high power and typically oil immersion objectives, respectively

1 ft²= 0.09290304m²

so:

43560ft²= 0.09290304m²×43560

= 4,046.8564224 m²

Answer: 4046.9m² (approx.)

Explanation:

An acre is 43560 ft², but the US has two feet, the International foot, and the (old) Survey foot. Since 1983, the answer varies by state according to which foot the State has adopted for surveying. (Previously, it was always the Survey foot).

International: 43560 ft² x (0.3048 m/ft)² = 4046.856 422 m²

Survey: 43560 ft² x (1200/3937 m)² = 4046.872 610 m²

Both round to 4046.9 m² if that’s good enough, but there is a tiny difference.

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Answer: D.

Explanation: Just took the quiz.

Answer:

D. F represents the activation energy

Explanation:

The given statement "vectors can be added together using the rules of algebra" is true.

A quantity or phenomena with independent qualities for both size and direction is called a vector. The word can also refer to a quantity's mathematical or geometrical representation. Velocity, momentum, force, electromagnetic fields, and weight are a few examples of vectors in nature.

When performing vector addition, you simply add the corresponding components of each vector together.

For example, if you have two vectors A = (a₁, a₂) and B = (b₁, b₂),

their sum C = A + B would be:

C = (a₁ + b₁, a₂ + b₂)

Any two vectors are not subject to the vector addition rule. Only when two vectors of the same kind and nature are they added.

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Answer:

they are,

1. scissor = they are very useful for cutting papers, clothes, etc. if there wouldn't be sicssor than we would not be able to cut various things . it has made easier to cut tgings.

2. nailcutter= it is also one type of simple machine. it is used to trim our nails. if there would be no nailcutter then our nail would be so dirty and long.

hope it helps..