An egg falls off a table. The floor is 0.8 m from the table top.
a) Calculate the time taken to reach the ground.

b) Calculate the velocity of impact with the ground.​

A person who weighs 120 pounds on earth would weigh approximately 20 pounds on the moon. This is because the force of gravity is weaker on the moon due to its lower mass and smaller size. The radius of the moon is about 1,737 km (1,080 miles) while its mass is approximately 7.342 × 10²² kg (81 billion tons).

Using this data, we can calculate the acceleration of gravity on the moon's surface which is about 1.62 m/s².A person who weighs 120 pounds on earth would weigh approximately 20 pounds on the moon.

Here's how to calculate the acceleration of gravity on the moon's surface:G = GM / R² where G is the acceleration of gravity, M is the mass of the moon, and R is the radius of the moon.

We know that M = 7.342 × 10²² kg and R = 1,737 km = 1,737,000 meters so we can plug in these values to find G.G = (6.67 × 10⁻¹¹ N(m/kg)²) (7.342 × 10²² kg) / (1,737,000 m)²G = 1.62 m/s²

Therefore, the acceleration of gravity on the moon's surface is 1.62 m/s².

A person who weighs 120 pounds on earth would weigh approximately 20 pounds on the moon. This is because the force of gravity is weaker on the moon due to its lower mass and smaller size.

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Answer:

A single-called organism must perform all cellular functions on its own

Explanation:

i took the test

Here's an example that includes absorption, refraction, and reflection in seawater:

When sunlight enters the ocean, different processes occur:

1. Absorption: As sunlight penetrates seawater, some wavelengths of light (such as red and yellow) are absorbed by the water molecules, reducing their intensity.

This absorption is why deeper water appears bluer, as blue wavelengths are absorbed less by the water and can penetrate deeper.

2. Refraction: When sunlight passes from air to seawater, the change in medium causes the light to bend, a process called refraction.

This bending of light is due to the different speeds at which light travels through air and seawater.

Refraction affects the way underwater objects appear, making them seem closer and larger than they actually are.

3. Reflection: When sunlight hits the surface of seawater, a portion of the light is reflected back into the atmosphere.

The angle of incidence (the angle at which the light hits the water) determines how much light is reflected.

At shallow angles, more light is reflected, and this is why the ocean can appear very bright and shiny from a distance.

In summary, sunlight entering seawater undergoes absorption (wavelengths of light being absorbed by water molecules), refraction (bending of light due to the change in medium), and reflection (light bouncing off the surface of the water).

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Answer:

1 deg C = 5/9 deg F         (Ex. 212 F - 32) * 5/9 = 100

So deg F = 9/5 deg C = 9/5 * 2.9 = 5.2 deg F

Answer:

The second step of the scientific method is the question being researched, the hypothesis. ... This hypothesis includes the explanation for the observation, it can be tested, and new conclusions may be reached. The third step of the scientific method is the experiment.

Explanation:

Answer:

The second step of the scientific method is the question being researched, the hypothesis. This hypothesis includes the explanation for the observation, it can be tested, and new conclusions may be reached. The third step of the scientific method is the experiment.

Explanation:

(a) The initial temperature is 373.95 K.

(b) The final temperature is 546.15 K.

(c) The total internal energy change of the fluid during this process is 515.4 kJ.

(d) The process can be represented as an isochoric heating process on the P-v diagram and as an isobaric expansion process on the T-v diagram.

(a) To find the initial temperature, we can use the saturated steam tables. At a pressure of 200 kPa, the corresponding saturation temperature is 373.95 K.

(b) Since the volume doubles, the process is an isochoric (constant volume) heating process. Using the ideal gas law, we can determine the final temperature. The initial and final volumes are related by the equation V_final = 2V_initial. Since the mass remains constant, the specific volume (v) is inversely proportional to the density (ρ). Therefore, ρ_final = ρ_initial/2. Using the ideal gas law, we can calculate the final temperature to be 546.15 K.

(c) The total internal energy change can be calculated using the equation ΔU = mC_vΔT, where m is the mass of the fluid and C_v is the specific heat at constant volume. Given the mass as 0.5 kg, the specific heat of water at constant volume, and the temperature change, we can find that the total internal energy change is 515.4 kJ.

(d) On the P-v diagram, the process is represented as a vertical line at 200 kPa, indicating constant pressure. On the T-v diagram, the process is shown as an upward-sloping line, indicating an isobaric expansion process. The initial state is represented as a point on the left, and the final state is represented as a point on the right. The path between the initial and final states is a straight line connecting these two points.

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Answer:

probably the trip where it took u 5 seconds

Answer:

the gravity

Explanation:

i think this is right

The power provided by the crane is 12,342,857.1 j/s.

Given here work done by crane is (W)= 432,000,000J and time taken (t) is 35second.

Power can be calculated by the formula, Power = Work done /time

Power = 432,000,000/35

Power = 12,342,857.1 joules per second.

Power is the rate at which work is done or energy is delivered. It can be expressed as the ratio of work done (W) or energy transferred  to time (t), or W/t. The watt, or one joule per second, is the unit of power. Power is a scalar quantity.

The work done by a force is defined to be the product of component of the force in the direction of the displacement and the magnitude of this displacement. Work can be calculated by multiplying Force and Distance. (W= F×s) . Work is also a scalar quantity.

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In order to quadruple the amount of lift created by an airfoil, the air velocity must be doubled.

What is airfoil?

A wing, a sail, or the blades of a propeller, rotor, or turbine are examples of objects whose motion through a gas can provide significant lift, and an airfoil or aerofoil is the cross-sectional shape of such an item.

By applying a downward push to the air as it passes, an airfoil produces lift. The air must exert an equal and opposite (upward) force on the airfoil, which produces lift, in accordance with Newton's third law.

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Answer:

The material you're looking for is insulation.

Explanation:

It reduces and/or stops electricity waves, heat waves, and sound waves from going past.

LOVE THE DOG

Explanation:

Answer:

1.A

2.C

3.B

4. i.dk about that one

Explanation:

1. It is true that Tracking your exercise can help you stick with an exercise routine.

2. Yes, it is best to do as many different kinds of exercise as possible.

3. Building muscle strength helps with all aspects of fitness

4. Yoga would be the best exercise to achieve this goal.

Exercise is any activity that utilizes the physical movements of the body that improves a people's health, endurance, and wellbeing while lowering their chance of contracting illnesses. It enables the person to keep their body weight in a healthy weight range.

The benefits of fitness fluctuate depending on the sort of dying a person experiences. Even if a muscle is stretched, excessive sitting can cause a number of illnesses, many of which are fatal. The individual should engage in mobility activities as well as exercising to improve their stamina.

Thus, exercise is very necessary for health.

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The magnitude of the beetle's average velocity for the whole trip is approximately 0.106 m/s.

To find the magnitude of the average velocity, we'll need to calculate the total displacement and total time.

The table is 1.5 m on each side.

The beetle travels along two sides, so its total displacement is 1.5 m + 1.5 m = 3.0 m.

The total time taken is 20.0 s + 12.5 s = 32.5 s.

The average velocity can be calculated as:
Average velocity = Total displacement / Total time
Average velocity = 3.0 m / 32.5 s ≈ 0.092 m/s

Summary: The magnitude of the beetle's average velocity for the whole trip on the square kitchen table is approximately 0.092 m/s.

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The beetle's average velocity for the trip is calculated by finding the total displacement (2.12 m) and dividing it by the total time (32.5 s). This results in an average velocity of 0.065 m/s.

The subject of this question is Physics, particularly dealing with concepts of displacement, average velocity, and vector quantities. The average velocity, in this case, is the total displacement (change in position) divided by the total time. The beetle's trip consists of two legs: first, it travels east for 1.5 m, then turns north and travels for another 1.5 m. This makes the total displacement of the beetle to be 1.5 m east + 1.5 m north = 2.1 m in a northeast direction. The total time of this trip is 20.0 s + 12.5 s = 32.5 s.

When it comes to calculating the magnitude of this displacement (ignoring the north/east directions and focusing only on the total distance), we need to consider that the beetle has essentially moved diagonally across a square table. If we treat this as a 45-degree right triangle, where the legs are each 1.5 m, the hypotenuse (total displacement) can be found using the Pythagorean theorem: hypotenuse = √(1.5^2 + 1.5^2) ≈ 2.12 m.

The average velocity of the beetle is now found by dividing this total displacement by the total time: average velocity = total displacement / total time = 2.12 m / 32.5 s = 0.065 m/s. So, the magnitude of the beetle's average velocity for the entire trip is 0.065 m/s.

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Sound moves faster in the denser regions of the ocean than in the less dense regions of the ocean.

We know that sound is a wave whose medium of propagation isthrough matter. Hence, sound move faster in a dense object than in a less dense object.

As such, sound moves faster in the denser regions of the ocean than in the less dense regions of the ocean.

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Answer:

✔ convergent

Explanation:

Answer:

B ( Convergent)

Explanation:

Answer: Large-scale surface ocean currents are driven by global wind systems that are fueled by energy from the sun. These currents transfer heat from the tropics to the polar regions, influencing local and global climate.

Explanation:

I hope this helped you some!

No. That would be silly.  The water in the tropics is the warmest, since the sun is most direct there.  

Any ocean current that takes water away from the tropics moves the water to cooler places, where the water cools off.  ESPECIALLY the poles, home of the coldest water on Earth.  ICE even !

The equation given, x^2/63,500 + y^2/50,900 = 1, represents an ellipse. An ellipse is a closed curve that resembles a flattened circle. In this case, it represents the shape of the moon's orbit around the Earth.

To understand the shape of the orbit, let's analyze the equation step by step. The equation is in the form (x^2/a^2) + (y^2/b^2) = 1, where a and b are positive constants.

The values of a and b determine the shape and size of the ellipse. In this equation, a is equal to √63,500 and b is equal to √50,900.

Comparing these values, we can see that a is greater than b. This means that the major axis of the ellipse is aligned with the x-axis, and the minor axis is aligned with the y-axis.

So, the shape of the moon's orbit is elongated horizontally, resembling a stretched circle. The wider part of the ellipse represents the maximum distance of the moon from the Earth (apogee), while the narrower part represents the minimum distance (perigee).

In summary, the equation x^2/63,500 + y^2/50,900 = 1 represents an elliptical shape for the moon's orbit around the Earth.

(Note: The terms "x263,500" and "y250,900" in the original question seem to be typos. The correct equation is x^2/63,500 + y^2/50,900 = 1.)

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The value of charge q on an equipotential surface that surrounds a point charge is calculated to be 12.52× 10⁻⁹ C.

The expression to find out electric potential at a distance r is given by,

v = k q /r

where,

v is electric potential

q is charge

r is distance

k is coulomb's constant (9 × 10⁹ Nm²/C²)

Electric potential is given as 490 V.

Area is given as 1.1 m². The expression for area is A = 4 π r².

Making r as subject, we have,

Radius r = √(A/4π) = √(1.1/4π) = √0.087 = 0.23 m

To find out charge, let us make q as subject,

q = v r / k = (490 × 0.23)/(9 × 10⁹) = 12.52× 10⁻⁹ C

Thus, the charge on an equipotential surface that surrounds a point charge is calculated to be 12.52× 10⁻⁹ C.

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Answer:

9.6 Amperes

Explanation:

1/R = 1 /5 + 1/5 + 1/5 + 1/5

solving for R we get 5/4 ohms

then from V=IR

I = V/R

I=12/(5/4)

hence I= 9.6 Amperes

A 12.0-volt battery is connected in a series, then the current through the battery is 9.6 A.

Electrical resistance is implemented as a circuit element by resistors, which are passive two-terminal electrical components. Resistors are devices that are used in electronic circuits for a variety of purposes, including lowering current flow, adjusting signal levels, dividing voltages, biasing active components, and terminating transmission lines.

As part of motor controllers, power distribution systems, or as test loads for generators, high-power resistors that can dissipate many watts of electrical energy as heat may be used.

According to the question,

1/R = 1 /5 + 1/5 + 1/5 + 1/5

R = 5/4 ohms

By ohm's law,

V=IR

I = V/R

I=12/(5/4)

I= 9.6 Amperes

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Answer:

2min

Explanation:

i think it will be clear from photo

Answer: The formula for current is charge/time

so here we have to change subject so we are asked to look for time  

Explanation: so it would be T=Q/I

T=4/2

T=2s

hope this helpss

a) The altitude of the satellite is approximately 1.15 x 10⁷ m.

b) The value of g at the location of this satellite is approximately 2.08 m/s².

a) The altitude of the satellite can be found using the formula for the period of a circular orbit: T = 2π√(r³/GM), where T is the period, r is the distance from the center of the Earth to the satellite, G is the gravitational constant, and M is the mass of the Earth. Solving for r, we get r = (GMT²/4π²)^(1/3). Substituting the given values, we get r ≈ 1.15 x 10² m.

b) The value of g at the location of the satellite can be found using the formula for gravitational acceleration: g = GM/r², where G is the gravitational constant, M is the mass of the Earth, and r is the distance from the center of the Earth to the satellite. Substituting the values found in part (a), we get g ≈ 2.08 m/s².

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Answer:

The smaller instruments, the violin and viola, make higher-pitched sounds, while the larger cello and double bass produce low rich sounds

\(hey \: i \: am \: new \: here \: nice \: to \: meet \: you\)

Answer:

base ,violin,cello are some

P-waves are the first seismic waves to arrive and travel at the fastest speeds when compared to other seismic wave types like S-waves and surface waves

The Primary wave, or P-wave, is the fastest kind of seismic wave. The initial tremors experienced during an

are brought on by these waves. P-waves are exceptional in that they can pass through both solid and liquid substances. The astounding speeds that P-waves can reach are up to 14,000 metres per second, or 45,932 feet per second.

P-waves are the first seismic waves to arrive and travel at the fastest speeds when compared to other seismic wave types like S-waves and surface waves. Predicting the size and location of earthquakes requires a thorough understanding of P-wave behaviour.

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Answer:

B.  10 m

Explanation:

f = v/λ = (20 m/s)λ / (5 m) = 4 Hz    original frequency

1/2(4 Hz) = 2 Hz   half the original frequency

(20 m/s) / λ = 2 Hz

λ = (20 m/s) / (2 Hz) = 10 m

The second wavelength would increase to 10 m

The situation that is understood using Newton's first law of motion, and not Newton's second law of motion are "A parked car" and "A car traveling in a straight line on cruise control"

Newton's first law of motion, also known as the law of inertia, states that an object at rest will remain at rest, and an object in motion will remain in motion at a constant velocity, unless acted upon by an external force. This law is best suited for situations where there is no net force acting on an object, such as a parked car or a car traveling in a straight line on cruise control.

On the other hand, Newton's second law of motion relates the acceleration of an object to the net force acting on it and its mass. This law is better suited for situations where there is a net force acting on an object, such as a free falling rock or a car on cruise control turning in a circle.

Therefore, the situations best understood using Newton's first law of motion are the parked car and the car traveling in a straight line on cruise control, and the situations best understood using Newton's second law of motion are the free falling rock and the car on cruise control turning in a circle.

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Answer:

P = I * V        definition of power

a)   P = V^2 / R        since  = I = V / R

R = V^2 / P = 120^2 / 100 = 144 ohms

b)     R = 120^2 / 60 = 240 ohms

c)     I = P / V       from top equation

I1 = 100 W/ 120  V = .833 amps          (P = 120^2 / 144 = 100 W)

I2 = 60 W / 120 V = .5 amps              ( P = 120^2 / 240 = 60 W

The direction of this current's magnetic force on an electron that is moving perpendicular to the page and outward from it on the left side of the wire is downward.

What is Magnetic force?

The force exerted by a magnetic field on a moving charged particle is known as a magnetic force. It is described by the formula F = q(v x B), where F is the magnetic force, q is the particle's charge, v is the particle's velocity, and B is the magnetic field.

The right-hand rule states that when a wire-carrying current is held in the right hand with the thumb pointing in the direction of the current, the fingers will curl in the direction of the magnetic field lines created by the current.

The magnetic field lines will create clockwise circles around the wire because, in this instance, the current flows from the top of the page downward.

Now imagine an electron on the left side of the wire traveling perpendicular to the page. The electron will experience a magnetic force since it travels in a direction perpendicular to both the magnetic field and the current.

We can use the left-hand rule for a negative charge to determine the direction of this force. If the left hand is held with the fingers pointing toward the magnetic field and the thumb pointing toward the electron's velocity, the palm will face the order of the force on the electron.

The thumb points to the left because the electron leaves to the left. The fingers curl because the magnetic field lines go clockwise around the wire. Therefore, the magnetic force acting on the electron is directed downward because the palm is facing downward.

Therefore, the magnetic pull exerted by this current on an electron traveling outward and perpendicular to the page on the wire's left side is directed downward.

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Answer:

When insulating materials rub against each other, they may become electrically charged . The material that gains electrons becomes negatively charged The material that loses electrons is left with a positive charge

Explanation:

(a) To show that (S,A) is a matroid, we need to prove that it satisfies the following three properties of a matroid:

1. A is non-empty and finite: A is the set of all subsets of S of size at most k. Since S is finite and k < |S|, there are a finite number of such subsets, so A is finite and non-empty.

2. Hereditary property: If B is a subset of an independent set A, then B is also independent. Let A be a set in A. If B is a subset of A, it means the size of B is at most the size of A. Since A has a size of at most k, B will also have a size of at most k, which makes B an independent set in A.

3. Exchange property: If A and B are independent sets and |A| < |B|, then there exists an element x in B-A such that A ∪ {x} is independent. Let A and B be independent sets in A with |A| < |B|.

Since B has at most k elements and A has less than k elements, there must be at least one element x in B that is not in A. Adding x to A will not make its size exceed k. Thus, A ∪ {x} is still an independent set in A.

Since (S,A) satisfies all three properties, it is a matroid.

(b) To transform the weight function of a weighted matroid problem with a minimum weight maximal independent subset to a standard weighted matroid problem, we can simply negate the weights of the elements in the set. In the standard weighted matroid problem, the goal is to find a maximal independent set with maximum weight.

By negating the weights, minimizing the sum of the negative weights is equivalent to maximizing the sum of the original weights, and the problem is transformed into a standard weighted matroid problem.

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