a)Sketch a velocity-time graph to show this information.b)Use the velocity-time graph to find each of the following.The greatest velocity of the cyclist.C)The total time taken for the journey.d)The acceleration of the cyclist during the final stage.e)Find the average speed of the cyclist during the whole journey.

Yes, because from the perspective of Earth, the planet appears to move in front of the star.

What do you understand by the term transit observation?

When a planet passes in front of an observer and a star, it is said to be transiting. When Venus or Mercury pass in front of Earth and the Sun, transits inside our solar system can be seen from the planet.

Therefore, Earth would  be a good candidate for a transit observation as from the perspective of Earth, the planet appears to move in front of the star.

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Location of the ball is top of the circle and acceleration is 3g.

Since tension force is more, surely ball is having net force upward and hence, the location of the ball in this case is top of the circle.

Any object that moves in a circle has an acceleration vector towards the center of that circle. This is known as Centripetal acceleration.

total force/ net force when ball is top of the circle is sum of tension force and gravity force.

\(F_{net\) = T + mg

Because of this net force, there is centripetal acceleration towards the center.

so, T + mg = ma

2mg + mg = ma

3mg = ma

a = 3 × force of gravity

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Answer: body composition is the proportion of fat and non fat mass in your body.

Explanation:

Answer:

Body composition is the percentage of a body's weight

Explanation:

Body composition is the body's amount of fat relative to fat-free mass. Individuals with optimal body composition are typically healthier, move more easily and efficiently, and generally feel better.

Photodetectors that rely on the external photoelectric effect are known as photoemissive detectors (sometimes spelled photoelectric detectors).

A photocathode of some kind is present in such a device, where incident light is partially absorbed to produce photoelectrons, which are released into free space.

The light reflected off of particles by a light beam inside the sensor chamber is used by smoke detectors to detect smoke. When there are no particles in the sensing chamber, the beam's light does not hit the light detector, signaling that everything is in order.

Ionization smoke alarms detect smoke from rapidly blazing fires, while photoelectric smoke detectors are best for detecting smoke from smoldering fires.

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A 0. 22 kg clay target is fired at an angle of 35° to the horizontal. It reaches a maximum height of 4. 6 m. Its initial speed when it is launched will be u = 16.66 m/s

Projectile motion is the motion of an object thrown (projected) into the air. After the initial force that launches the object, it only experiences the force of gravity. The object is called a projectile, and its path is called its trajectory.

The object's maximum height is the highest vertical position along its trajectory. The horizontal displacement of the projectile is called the range of the projectile. The range of the projectile depends on the object's initial velocity.

h (max) = \(u^{2}\) \(sin^{2}\)(theta) / 2g

given

theta = 35°

Maximum height = 4. 6 m.

u = ?

4.6 = \(u^{2}\) * \(sin^{2}\)(35) / 2*  9.8

  u = 16.66 m/s

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Answer:

2 m/s²

Explanation:

a = Δv / Δt

a = (3 m/s − 1 m/s) / 1 s

a = 2 m/s²

Using g = 9.8 m/s2, the statement that best describes the roller coaster car when it is at the top of the loop-de-loop is that The car has both potential and kinetic energy, and it is moving at 24.6 m/s. The correct answer is B) The car has both potential and kinetic energy, and it is moving at 24.6 m/s.

Potential energy is the energy that is stored in any object or system as a result of its position or component arrangement. The environment outside of the object or system, such as air or height, has no impact on it. In contrast, kinetic energy refers to the energy of moving particles inside a system or an item.

The energy an individual or an object has as a result of motion in this case, the motion of the falling apple is known as kinetic energy. Potential energy, which exists in a bike that is parked on top of a hill, is converted to kinetic energy when you start riding it downhill. These two energies are both expressed as joules.

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Answer: B (The car has both potential and kinetic energy, and it is moving at 24.6 m/s.)

Explanation:

Answer:

High water level during a tide is called High tide.

Low water level during a tide is called Low tide.

Primates rely primarily on vision to negotiate their environment.

As highly adaptable mammals, primates possess a keen sense of sight which enables them to successfully interact with their surroundings. This exceptional visual acuity is mainly due to their well-developed eyes, which allow for excellent color discrimination, depth perception, and the ability to see in low-light conditions.

Primates possess forward-facing eyes, a feature that contributes to the enhancement of their depth perception. This is crucial for tree-dwelling species that must accurately judge distances when jumping between branches or reaching for food. Additionally, the majority of primates have trichromatic vision, meaning they can see and differentiate a wide range of colors. This ability helps them identify ripe fruits and detect potential predators or threats.

Furthermore, primates have a larger brain size in comparison to other mammals, which aids in the processing of visual information. The visual cortex, the part of the brain responsible for processing visual data, is particularly well-developed in primates, enabling them to efficiently interpret and respond to their environment.

In summary, primates rely primarily on vision to navigate and adapt to their surroundings. Their advanced visual capabilities, such as enhanced depth perception, color discrimination, and low-light vision, coupled with a well-developed visual cortex, allow them to successfully interact with their environment and thrive in a variety of habitats.

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Answer:

\(\boxed {\boxed {\sf 20 \ Hz}}\)

Explanation:

The frequency of a wave can be found using the following formula.

\(f=\frac{v}{\lambda}\)

where f is the frequency, v is the velocity/wave speed, and λ is the wavelength.

The wavelength is 10 meters and the velocity is 200 meters per second.

Therefore:

\(v= 200 \ m*s^{-1} \\\lambda = 10 \ m\)

Substitute the values into the formula.

\(f=\frac{200 \ m*s^{-1}}{10 \ m}\)

Divide and note that the meters (m) will cancel each other out.

\(f=\frac{200 \ s^{-1}}{10 \ }\)

\(f=20 \ s^{-1}\)

\(f= 20 \ Hz\)

The frequency of the wave is 20 Hertz

Answer:

Bottle opener works on a fulcrum.

Explanation:

A bottle opener is a second-class lever because the pivot point is at one end of the opener and the load is in the middle.

Answer:  NOx and VOC combine chemically with oxygen to form ozone

Explanation:

If we were to make copies of musical content up to the 6th time, Mp3 players would have better sound quality because they have digital signals to produce sound, which do not deteriorate over time.

Cassette tapes work on analog magnetic tape recording format for recording audio and playback whereas mp3 is a type of digital technology that has digital signals to produce sound. This is the reason why cassettes do not sound better than digital mp3 players.

Cassette tapes being magnetic type media suffer from print which causes to hear a bit of sound before the sound is even started and result in deterioration over time whereas digital signals do no deteriorate over time.

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Answer:

Earth’s gravitational force is stronger

Explanation:

Earth’s gravitational force is stronger than the moon because of the presence of more massive objects in earth; on the flip side, the moon’s gravity is weaker than the earth due to smaller in size as compared to the earth. Earth gravity is denoted by g; conversely, moon gravity is denoted by gm

Answer: The greater an object's mass, the more gravitational force it exerts. So, to begin answering your question, Earth has a greater gravitational pull than the moon simply because the Earth is more massive. That's why the moon isn't pulled out of Earth's orbit by the gravity of larger planets or by the sun.

Explanation:

The magnitude of the vector displacement is 15.65 m.

The resultant force acting on the object is calculated as follows;

\(F = \sqrt{F_x^2 + F_y^2} \\\\F = \sqrt{4^2 + 6^2} \\\\F = 7.21 \ N\)

The displacement of the vector is calculated as follows;

W = Fs cosθ

\(s = \frac{W}{Fcos(\theta)} \\\\s = \frac{106}{7.12 \times cos(18)} \\\\s = 15.65 \ m\)

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A given amount of heat energy cannot be completely converted to mechanical energy in any process. According to the laws of thermodynamics, there will always be some energy loss in the form of waste heat during any energy conversion process.

The second law of thermodynamics states that in any closed system, the total entropy (a measure of energy dispersal or disorder) always increases or remains constant. This means that when converting heat energy to mechanical energy, some of the heat energy will always be lost as waste heat, resulting in a decrease in the efficiency of the conversion process.

Efficiency is defined as the ratio of useful work or mechanical energy output to the total energy input. Due to the inherent limitations imposed by the laws of thermodynamics, the efficiency of converting heat energy to mechanical energy is always less than 100%. Therefore, it is not possible to completely convert heat energy into mechanical energy without any energy loss.

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The distance covered would be 821.4 m You can use the following conventional formula to get the distance traveled at constant acceleration over a specific period of time: d = 1/2 * a * t²

0 m/s is the initial velocity, or u.

m/s is the final velocity.

t = 7.4 seconds of time.

30 m/s2 is the acceleration, a.

displacement plus s =? m

There is no kinematic equation that can calculate the displacement using the variables provided in the question, hence the solution must be two steps.

Use the kinematic equation below to get the rocket's final velocity.

v = u + at

v=0 + (30 m/s2 7.4 s) = 222 m/s

Use the kinematic equation below to determine the rocket's displacement.

s = ½(v + u)t

s = 0.5 (7.4 s) = 821.4 m (222 m/s + 0 m/s)

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Answer:

True

Explanation:

APEX APPROVED

Answer:

works in the opposite direction of motion

When you double your distance from a sound source that is radiating equally in all directions, the intensity level of the sound drops by 6 dB.

Here's a step-by-step explanation:

1. Sound intensity level (L) is measured in decibels (dB) and is related to sound intensity (I) by the formula: \(L = 10 \times log_{10}(\frac{I}{I_0} )\), where is the reference intensity.

2. When you double the distance from a sound source, the intensity (I) is inversely proportional to the square of the distance.

3. If the initial distance is d, and the new distance is 2d, the intensity ratio \(\frac{I}{I_0}\) will be \(\frac{1}{4}\) times the original intensity ratio.

4. Plugging the new intensity ratio into the formula, the new intensity level will be  \(L_2 = 10 \times log_{10}((\frac{1}{4} ) * \frac{I}{I_0} ).\)
5. Comparing the initial intensity level (L1) to the new intensity level \(L_2\), we get:\(L_2 = L_1 - 10 \times log_{10}(4)\).

6. Simplifying, we get \(L_2 = L_1 - 6 dB.\)

So, when you double your distance from the sound source, the intensity level drops by 6 dB.

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Answer:

A

Explanation:

Molecules is made up from and atom is made up with three tiny elements: protons, neutrons, and electron.

Statement A correctly describes what atoms and molecules are made of.  Molecules are made of atoms, and atoms are made of protons, neutrons, and electrons.

The atom consists of matter that may be split without releasing electrical charges.

It's also the smallest unit of matter with chemical element features. As a result, the atom is the fundamental unit of science.

In the nucleus, proton and the neutron is existing. The condition of the atom to be electrically neutral is that the number of the proton and electron should be the same.

Molecules are made of atoms, and atoms are made of protons, neutrons, and electrons.

Hence, statement A correctly describes what atoms and molecules are made of.  

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Answer:

the answer is C

Explanation:

The car, first is at rest and if you don't accelerate it won't move. When to hit the gas it will accelerate from rest

To drive a car at a constant velocity, you have to hit the gas. That's because, the car needs to create a force to offset the other forces acting on it. Hence, option (A) is correct.

The resistance provided by surfaces in touch as they move past one another is known as friction.

To walk without slipping, traction is provided by friction. In most situations, friction is advantageous. They do, however, give a strong amount of opposition to the move. Additionally, around 20% of an automobile's engine power is used to overcome frictional forces in the moving parts.

When a car moves on a road, a frictional resisting force acts on the tires of the car for which the velocity of the car decreases constantly. Hence,  the car needs force  to offset the resisting forces acting on it. That is why,   you have to hit the gas to drive a car at a constant velocity.

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Answer:

the percentage we have the fraction between the error and the magnitude,

Explanation:

When absolute error is used, it is a value that remains constant regardless of the magnitude of the measurement, for large measurements it can represent great accuracy, but for small measurements the accuracy may be low, for example> if we use a tape measure with error of Dx = 0.1 cm if the measurement is 1 meter this error is acceptable, but if the measurement is 1 cm the error is too big.

When we use the percentage we have the fraction between the error and the magnitude, so if this relationship is small the measure is very tight and but if the relationship is high the measure has little pressure, for example

           Δx = 1 cm = 0.01 m

          % = 0.01 / 1   100 = 1%

          % = 0.01 / 0.01 100 = 100%

therefore the precision of the measurement is known the percentage error

Answer:

The gravitational force between two objects, one of mass M1 and the other of mass M2, is:

F = G*M1*M2/R^2

Where G is a constant:

G = 6.6x10^11 m^3*/(kg*s^2)

And R is the distance between the two objects.

M1 = 5.9742x10^24 kg

M2 = 7.36x10^22 kg

R = 382171 km = 382171000 m

Then the gravitational force is:

F = 6.6x10^-11 m^3*/(kg*s^2)*(5.9742x10^24 kg)*(7.36x10^22 kg)/(382171000 m)^2

F = 1.987x10^20 N

Answer:

5.5 m/s^2

Explanation:

I believe this is the answer > using the formula a= v-v0/t

Hope this helps!

Answer:

-1 m/s²

Explanation:

Given:

Δx = 32 m

v₀ = 10 m/s

t = 4 s

Find: a

Δx = v₀ t + ½ at²

32 m = (10 m/s) (4 s) + ½ a (4 s)²

a = -1 m/s²

Answer:

"Scientist use radioactive decay to measure the age of a rock or fossil."

Explanation:

"To establish the age of a rock or a fossil, researchers use some type of clock to determine the date it was formed. Geologists commonly use radiometric dating methods, based on the natural radioactive decay of certain elements such as potassium and carbon, as reliable clocks to date ancient events."

The position-time graph gives the position of an object at any instant of time. The y-intercept gives the position of the object at the instant when the time is zero. That is, the y-intercept gives the initial position of the object.

Thus the given statement is false.

Both on the part of the Earth that faces the Moon in a direct line and on the part of the Earth that faces the Moon in a straight line.

Because the moon's gravitational attraction is greatest on the side of Earth that confronts it, the point confronting the moon is created. High tide happens as gravity draws the water toward the moon.

It seems sense to conclude that the range of the semi - diurnal tides is greatest near the equator and diminishes toward the poles since, on average, the moon is directly above the equator.

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