Look at the distance-time graph for a remote-controlled car. What is the speed of the car?
Pls help

The speed of the microwaves is 3 × 10^10 meters per second. This result indicates that microwaves, like all electromagnetic waves, travel at the speed of light in a vacuum.

The speed of a wave can be calculated using the formula: speed = frequency × wavelength. In this case, the frequency of the microwaves is given as 10,000 million Hz, which is equivalent to 10,000 × 10^6 Hz or 10^10 Hz. The wavelength is given as 0.03 m.

Plugging these values into the formula, we have:

Speed = (10^10 Hz) × (0.03 m)

Simplifying the calculation, we find:

Speed = 3 × 10^10 m/s

Therefore, the speed of the microwaves is 3 × 10^10 meters per second. This result indicates that microwaves, like all electromagnetic waves, travel at the speed of light in a vacuum. The speed of light is approximately 3 × 10^8 meters per second, so microwaves have a slightly higher speed due to their longer wavelength. It's important to note that the speed of light is a fundamental constant of nature and does not depend on the properties of the specific electromagnetic wave being considered.

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Answer:

\(-5.0\frac{m}{s}\) or \(5.0\frac{m}{s}\) to the left

Explanation:

The equation for an elastic collision is \((m_1v_1)_i+(m_2v_2)_i=(m_1v_1)_f+(m_2v_2)_f\). Rearrange the equation for an elastic collision to solve for \((v_2)_f\):

\(\frac{[(m_1v_1)_i+(m_2v_2)_i-(m_1v_1)_f]}{m_2}\)

For this problem, let

\(m_1=1\ kg\\m_2=0.2\ kg\\(v_1)_i=0.0\ \frac{m}{s}\\(v_2)_i=10.0\ \frac{m}{s}\\(v_1)_f=3.0\ \frac{m}{s}\)

So,

\(\frac{[(1\ kg*0.0\ \frac{m}{s})+(0.2\ kg*10.0\frac{m}{s})-(1\ kg*3.0\ \frac{m}{s})]}{0.2\ kg}\\\frac{(0.0\ \frac{kg*m}{s})+(2.0\ \frac{kg*m}{s})-(3.0\ \frac{kg*m}{s})}{0.2\ kg}\\\frac{-1.0\ \frac{kg*m}{s}}{0.2\ kg}\\-5.0\ \frac{m}{s}\)

This result indicates that cart B will move to the left after the collision.

The velocity of the car after 6.9 s if its acceleration is 1.5 m/s² due south would be  10.35 meters / seconds.

There are three equations of motion given by  Newton

v = u + at

S = ut + 1/2×a×t²

v² - u² = 2×a×s

Note that these equations are only valid for a uniform acceleration.

As given in the problem we have to find the velocity of the car we have to find the velocity of the car  after 6.9 s if its acceleration is 1.5 m/s² due south,

The acceleration of the car = 1.5 m/s²

The time taken by the car = 6.9 seconds

By using the first equation of the motion,

v = u + at

v = 0 + 1.5*6.9

v = 10.35 meters / seconds

Thus, the velocity of the car after 6.9 s, if its acceleration is 1.5 m/s² due south, would be  10.35 meters / seconds.

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Answer:

L = 2.1 m

Explanation:

From Young's Double Slit Experiment, the formula for the distance between two consecutive dark or bright fringes, called fringe spacing, is derived as:

Δx = λL/d

where,

Δx = distance between first and second dark fringe = 4 mm = 4 x 10⁻³ m

λ = wavelength of light = 575 nm = 5.75 x 10⁻⁷ m

d = distance between the slits = 0.3 mm = 3 x 10⁻⁴ m

L = Distance from slits to screen = ?

Therefore,

4 x 10⁻³ m = (5.75 x 10⁻⁷ m)(L)/(3 x 10⁻⁴ m)

L = (4 x 10⁻³ m)/(1.92 x 10⁻³)

L = 2.1 m

The time taken for the bit to reach the maximum speed is 1.35 seconds.

The angular acceleration of the bit is determined by applying the following kinematic equation as shown below.

ωf² = ωi² + 2αθ

where;

α = (ωf² - ωi²)/2θ

α = (46,100² - 17,600²) / (2 x 19,700)

α = 46,077.4 rad/s²

The time taken for the bit to reach the maximum speed is calculated as follows;

ωf = ωi + αt

t = (ωf - ωi) / α

t = (79,900 - 17,600) / (46,077.4)

t = 1.35 seconds

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The answers are 4. The distance from where the ball was kicked is 38.06 meters, 5. The speed of the ball 2.5 seconds after it was kicked is 13.82 m/s, and  6. The ball is 21.88 meters above the ground 2.5 seconds after it is kicked.

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Answer:Position is an object’s location in relation to a reference point.

Yes. As in the movie theater example, an object can be one unit positive from the reference point and a different object can be one unit negative from the reference point. Both objects are one unit away (the same distance), but they occupy different locations in space because they are in different directions.

Distance is the total amount an object has traveled, while displacement is the shortest distance between the object’s starting and finishing point.

Distance does not have direction. Objects can be one unit away from a point in every direction. However, displacement does have a direction. Displacement is defined as a specific distance in a specific direction.

Explanation: hope it helped

A.  The acceleration results when 2 rubber bands stretched to 20 cm are used pull a cart with three bricks is 0.25 m/s².

The force applied on object is obtained by multiplying the mass and acceleration of the object.

According to Newton's second law of motion, the force exerted on an object is directly proportional to the product of mass and acceleration of the object.

Also, the applied force is directly proportional to the change in the momentum of the object.

Mathematically, the force acting on object is given as;

F = ma

a = F/m

where;

From the trials, the acceleration results when 2 rubber bands stretched to 20 cm are used pull a cart with three bricks is 0.25 m/s².

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One full weather station reports  wave passing a spot every second is equivalent to a frequency of 1 Hz. The frequency is 48=12=0.5 Hz if 4 waves pass a spot in 8 seconds.

The number of cycles that make up a time unit is the frequency. The frequency of a wave with a 30-second period is therefore 1 30 = 0.033 cycles per second, or 0.033 Hertz (Hz).

A wave's speed and wavelength vary as it crosses a border and enters a new medium, but its frequency doesn't.

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In order to find the current, we can use the formula below for the electric power:

Where I is the current (in A) and V is the voltage (in V).

So, using P = 1.5 * 10^9 W and V = 4 * 10^5 V, we have:

Therefore the current is 3.75 * 10^3 A or 3.75 kA.

High tides occur when the sun and moon are at right angles to one another. This is because the gravitational pull of the moon and the sun combine to create larger-than-normal tides, known as spring tides. The correct option is A.

Gravitational pull is the force of attraction that exists between two objects with mass. The greater the mass of an object, the greater its gravitational pull.

Option B, "Low tides occur when the sun and moon are at right angles to one another," is incorrect. Low tides occur when the sun and moon are at a 90-degree angle (or "quarter moon") to each other, but this position also results in high tides on the opposite side of the Earth.

Option C, "The gravitational pull of the sun and moon combined creates larger than normal tides," is partially correct. The gravitational pull of both the sun and moon does contribute to the tides, but the specific position depicted in the image (sun and moon at right angles to each other) does not necessarily create larger than normal tides.

Option D, "The gravitational pull of the sun reduces the moon's gravitational pull to create moderate tides," is also incorrect. The sun's gravitational pull does have an effect on the tides, but it does not reduce the moon's gravitational pull. Rather, the combined gravitational pull of the sun and moon creates the tides we observe.

Therefore,The accurate description of the tide represented by the image below is option A: "High tides occur when the sun and moon are at right angles to one another."

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Explanation:

The answer is C thick carpet

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Answer:

it is C

Explanation:

The Big Bang theory is the most widely accepted explanation for the origins of the universe, but it does not necessarily imply that the universe emerged from nothing.

It is possible that new discoveries or insights may shed light on this fundamental question in the future. The universe may have arisen from a pre-existing state or through some other natural process that we do not yet understand.

Instead, the theory describes how the universe underwent a rapid expansion from a very dense and hot state. The conditions and laws of physics that applied during the earliest moments of the universe may not necessarily be the same as those we observe today, and there are many unknowns and uncertainties in our understanding of these early stages.

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The expression for the tension in the spring A is T(A) = √[(-W cos(90 - θ))² + (W sin(90 - θ))²]

The tension in spring A can be determined by resolving the forces into x and y components as shown below.

The angle spring A makes with horizontal is calculated as;

A = 90⁰ - θ

The horizontal component of the tension on spring A;

T(Aₓ) = -W cos(A)

T(Aₓ) = -W cos(90 - θ)

The vertical component of the tension of spring A is calculated as;

T(Ay) = W sin(A)

T(Ay) = W sin(90 - θ)

The expression for the tension in spring A is calculated as;

T(A) = √[(T(Aₓ)² + T(Ay)²]

T(A) = √[(-W cos(90 - θ))² + (W sin(90 - θ))²]

Thus, the expression for the tension in the spring A is determined through resolution of vector components.

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Answer:

See Explanation

Explanation:

salt, water, rocks, sediment, trash.

Abiotic factors are non-living organisms in an ecosystem.

Hope this helps and have a nice day

The angular displacement of a point located at r  is 7200π radians.

The angular displacement of a point located at Yr can be calculated using the formula: θ = ωₒt + (1/2)αt^2, where ωₒ is the initial angular velocity (in radians per second), t is the time it takes to come to rest, and α is the angular acceleration (in radians per second squared).

The initial angular velocity of the wheel can be calculated as ωₒ = 2πnₒ, where nₒ is the initial speed in revolutions per minute (RPM). We have nₒ = 200 RPM, so ωₒ = 2π * 200 / 60 = 40π radians per second.

The angular acceleration can be calculated as α = - ωₒ / t = - 40π / 90 = - 2π / 4.5 radians per second squared.

Plugging in the values, we get θ = 40π * 90 + (1/2)(-2π / 4.5) * 90²2 = 3600π radians.

The angular displacement of a point located at r can be calculated as θ = 2θ, since the distance traveled is twice as long. So, the angular displacement of a point located at r = 2θ = 2 * 3600π = 7200π radians.

The linear distance traveled by the point at h can be calculated as d = θ * Yr, where Yr is the radius of the wheel. Plugging in the values, we get d = 7200π * 20 cm = 144000π cm.

The period of one rotation before it was cut off can be calculated as T = 60 / nₒ = 60 / 200 = 0.3 seconds.

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Answer:

2.5 hours

Explanation:

we know that the train travels 64km every hour so we just need to divide 160km by 64km to see how many hours it will take

160÷64= 2.5

hope this helps chu :3

The pressure of the tank, when filled with water at a depth of 6 m, is approximately 580.124 atmospheres (atm). To calculate the pressure of the tank, one can use the equation: Pressure (P) = Density (ρ) × g × Depth (h)

Pressure (P) = Density (ρ) × g × Depth (h)

Given: Density of water (ρ) = 1000 kg/m³

Acceleration due to gravity (g) = 9.8 m/s²

Depth (h) = 6 m

Using the given values, one can calculate the pressure:

Pressure = 1000 kg/m³ × 9.8 m/s² × 6 m Pressure

= 58800 kg·m⁻¹·s⁻²

Now, let's convert the units to pascals (Pa) using the conversion 1 atm = 1.013 x \(10^5\) Pa:

Pressure = 58800 kg·m⁻¹·s⁻² × (1 atm / 1.013 x\(10^5\) Pa)

Pressure = 580.124 atm

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Answer:

T large = 3T small

Explanation:

It's just 3 times larger

Jogging speed typically ranges from 4 to 6 mile per hour . Jogging frequently maintains the touch with the ground, but running is sometimes regarded as requiring a brief break from it.5.75 miles per hour

Simply dividing you run distance with your run time will give you your running speed. Thus, if someone ran 10 kilometers in half an hour, you can run 0.2 kilometers per minute. Flip the numbers to determine your pace for running. 5 minutes per kilometer equals four hours divided by 10 kilometers.

A great weight-loss workout is running. It reduces dangerous belly fat while burning much more calories during and possibly long after exercise. Running is easy to learn how to do and has a lot of other health advantages.

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Answer:

Explanation:

initial velocity, u = 43 m/s

final velocity, v = 3.38 m/s

time, t = 70 sec

acceleration, a = v - u / t

3.38 - 43 / 70

= -39.62/ 70

= -0.56 m/s^2

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Stay safe!!

Answer:

alcohol thermometer is preferred for a very cold region. Alcohol thermometer is preferred for a very cold region because its freezing point of alcohol is - 117°C. So, it can measure the temperature of the very cold region.

The spaceship is traveling towards the Sun with velocity  0.319c.

One of the most significant works in the history of physics is Albert Einstein's 1905 theory of special relativity. The theory of special relativity explains how speed affects space, time, and mass. Small amounts of mass (m) can be interchangeable with large amounts of energy (E), as defined by the classic equation E = mc², according to the theory, which offers a means for the speed of light to define the link between energy and matter.

Given parameters:

The radius of the orbit of Jupiter is 43.2 light-minutes.

that of the orbit of Mars is 12.6 light-minutes.

Hence, actual distance between them l₀= 43.2 - 12.6 light-minute = 30.6  light-minute.

Let the velocity of the spaceship is v.

Time taken to travel this actual distance  = l₀ √(1+v²/c²)/v

According to the question

l₀ √(1+v²/c²)/v = 35.0

√(c²+v²) = 35.0 v

c² = 1224 v²

v =  0.319c

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Answer:

The number of images formed by two adjacent plane mirrors depends on the angle between the mirror. If (in degrees) is angle between the plane mirrors then number of images are given by, n = 360 θ − 1.

Surface area of pyramid 1  539.2 \(m^{2}\) Pyramid 2: 370.9 \(m^{2}\) Pyramid 3: 446.4 \(m^{2}\)

To find the surface area of a pyramid, we need to know the dimensions of its base and its slant height. Assuming the base of each pyramid is a square, we can calculate the surface area using the formula:

Surface Area = Base Area + (0.5 × Perimeter of Base × Slant Height)

Let's calculate the surface area for each pyramid using the given dimensions:

1. Pyramid 1: Base = 12.2 m Slant Height = 16 m Base Area = (12.2 \(m^2\)= 148.84 \(m^2\)Perimeter of Base = 4 × 12.2 m = 48.8 m

Surface Area = 148.84 \(m^2\)+ (0.5 × 48.8 m × 16 m) = 148.84 m^2 + 390.4 \(m^2\) = 539.24 \(m^2\) (rounded to nearest tenth)

2. Pyramid 2: Base = 10.6 m Slant Height = 12.2 m Base Area = (10.6 \(m^2\))= 112.36\(m^2\) Perimeter of Base = 4 × 10.6 m = 42.4 m

Surface Area = 112.36\(m^2\)+ (0.5 × 42.4 m × 12.2 m) = 112.36 \(m^2\)+ 258.56 \(m^2\) = 370.92 \(m^2\)(rounded to nearest tenth)

3. Pyramid 3: Base = 12.2 m Slant Height = 12.2 m Base Area = (12.2 \(m^2\)= 148.84 \(m^2\)Perimeter of Base = 4 × 12.2 m = 48.8 m

Surface Area = 148.84 m^2 + (0.5 × 48.8 m × 12.2 m) = 148.84 \(m^2\)+ 297.52 \(m^2\) = 446.36 \(m^2\) (rounded to nearest tenth)

Therefore, the surface areas of the given pyramids are approximately: Pyramid 1: 539.2 \(m^2\)Pyramid 2: 370.9 \(m^2\) Pyramid 3: 446.4 \(m^2\).

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Answer:

energy is absorbed during the process of the ice melting.

Ecotourism has the potential to eliminate the requirement to hunt wildlife for a living. Ecotourism generates revenue by maintaining the rainforest; deforestation is discouraged because it reduces tourist revenue.

Ecotourism firms safeguard biodiversity by preserving animals in their natural habitats and preserving natural ecosystems in biosphere reserves, wildlife sanctuaries, and national parks.

Ecotourism contributes to the preservation of a destination's ecological and biological diversity. For example, since Costa Rica's jungle is so popular with visitors, inhabitants work hard to protect it instead of attempting deforest it for a short-term profit.

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A cell of inter resistance of 0.5 ohm is connected to coil of resistance 4 ohm and 8 ohm joined in parallel.If there is current of 2A in 8 ohm, the electromotive force (emf) of the cell is approximately 14.5 volts.

To find the emf of the cell, we can apply Ohm's Law and Kirchhoff's laws to analyze the circuit.

Given:

Resistance of the coil, R1 = 4 ohm

Resistance of the other resistor, R2 = 8 ohm

Current passing through the 8-ohm resistor, I = 2A

First, let's analyze the parallel combination of the 4-ohm and 8-ohm resistors.

The total resistance of two resistors in parallel can be calculated using the formula:

1/Rp = 1/R1 + 1/R2

Substituting the given values, we have:

1/Rp = 1/4 + 1/8

1/Rp = 2/8 + 1/8

1/Rp = 3/8

Rp = 8/3 ohm

Now, let's consider the total resistance in the circuit, which includes the internal resistance of the cell (0.5 ohm) and the parallel combination of the resistors (8/3 ohm).

R_total = R_internal + Rp

R_total = 0.5 + 8/3

R_total = 1.833 ohm

Now, we can find the emf of the cell using Ohm's Law:

emf = I * R_total

emf = 2 * 1.833

emf ≈ 3.667 volts

Therefore, the emf of the cell is approximately 3.667 volts.

However, it is worth noting that the given current of 2A passing through the 8-ohm resistor does not affect the emf calculation since the emf of the cell is independent of the current in the circuit.

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