a stone is thrown straight upwards with a velocity of 6.38 m/s, starting from 1.63 m above the ground. how long does it take the stone to reach the ground? g

At t = 2s, the magnitude of the complex velocity can be calculated as:

\(|Z'| = |i|= 1\) , and at t = 2s, the magnitude of the complex acceleration is:

\(|Z''| = |0| = 0\).

A. To find the complex velocity Z', we differentiate the complex position z with respect to time t.

\(z = t + i(t - i)\)

Taking the derivative with respect to t:

\(dz/dt = 1 + i(1 - i)\)

Simplifying, we get:

\(Z' = 1 + i - 1 = i\)

At t = 2s, the magnitude of the complex velocity can be calculated as:

\(|Z'| = |i| = 1\)

B. To find the complex acceleration Z'', we differentiate the complex velocity Z' with respect to time t.

\(Z' = i\)

Taking the derivative with respect to t:

\(dZ'/dt = 0\)

The complex acceleration Z'' is zero, regardless of the value of t.

Therefore, at t = 2s, the magnitude of the complex acceleration is:

\(|Z''| = |0| = 0\\\).

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We notice that some distant galaxies are travelling in our direction, but the motion of the galaxies in our local group is different. A true image of the actual galaxies was used to create the composite image.

Of the Local Group. Are members of the Local Group. If not in exact scale, the galaxies have been positioned in the roughly proper orientation. Edwin Hubble was the first to recognise the Local Group at the time of the earliest observations of redshift and distance. Stars, stellar remnants, interstellar gas, dust, and dark matter are all gravitationally bonded together in a motion. The term is literally "milky," alluding to the Milky Way.

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Answer:

Hi, thank you for posting your question here at Brainly.

To find the velocity of light or any electromagnetic wave, we use the equation: v = wavelength * frequency. Substituting,

v = 0.5 m * 930 1/s

v = 465 m/s

Brainiest please

Explanation:

From the calculation, there is a net force that acts on the car and then the acceleration that is produced by the net force is 0.296 m/s^2.

The term net force refers to the force that is acting on an object that makes it to move. We have to recall that the force of friction is the force the limits the motion of an object. In other words, it is the force of friction that makes a body not to be able to move and this must be overcome by the forward force when it is greater than the friction force.

Now;

Mass of the car = 1352 kg

Forward force = 7820 N

Coefficient of friction = 0.56

Frictional force = μmg

= 0.56 * 1352 kg * 9.8 m/s^2

= 7419.8 N

Net force = Forward force - Frictional force

= 7820 N -  7419.8 N

= 400.2 N

Then;

Net force = ma

m = mass

a = acceleration

a = Net force/m

a = 400.2 N/ 1352 kg

a = 0.296 m/s^2

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Answer:

0.645% of the mass is carried out when nuclear fusion takes place

Explanation:

The magnitude of the output gear angular velocity is 50 rad/sec. The actual value of the angular velocity will depend on the specific values of the gear ratio and the input gear's angular velocity.

The magnitude of the output gear angular velocity is determined by the gear ratio between the input and output gears. The gear ratio is the ratio of the number of teeth on the output gear to the number of teeth on the input gear.
To find the magnitude of the output gear angular velocity in units of rad/sec, you can use the formula:
Output gear angular velocity = Input gear angular velocity * (Number of teeth on input gear / Number of teeth on output gear)
Let's say the input gear has 20 teeth and the output gear has 40 teeth. If the input gear is rotating at 100 rad/sec, we

can calculate the output gear angular velocity as follows:
Output gear angular velocity = 100 rad/sec * (20 / 40) = 50 rad/sec
In this case, the magnitude of the output gear angular velocity is 50 rad/sec.
Remember to check the units and the gear ratio to ensure the correctness of your calculation. Also, note that the actual value of the angular velocity will depend on the specific values of the gear ratio and the input gear's angular velocity.

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C_min = (I_avg * T) / V_ripple. If a full-wave rectifier is needed, the ripple voltage is typically reduced by half compared to a half-wave rectifier. Therefore, the same calculation can be used to determine the minimum smoothing capacitance for the full-wave rectifier.

but with a ripple voltage of half the value used in the half-wave rectifier calculation.Where C_min is the minimum required capacitance, I_avg is the average current, T is the time period of the waveform (in seconds), and V_ripple is the desired peak-to-peak ripple voltage.

In this case, I_avg = 250 mA (or 0.25 A) and V_ripple = 0.2 V. The time period T can be calculated as the reciprocal of the frequency of the AC input signal.

Once you have the time period T, you can substitute the values into the formula to determine the minimum required smoothing capacitance C_min.

Remember to convert all units to be consistent (e.g., A to mA and F to μF) when performing the calculation.

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Answer:

because we naturally use energy everyday in everyway , energy is also a bill for instance you electric bill used by energy

Explanation:

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Answer:

.516

Explanation:

I typed this into Acellus and it was correct.

a. For DFA M1, the start state is q0.

b. For DFA M1, the set of accept states is {q1}.

c. For input "aabb", the sequence of states that DFA M1 goes through is: q0 -> q1 -> q1 -> q1 -> q1.

d. Yes, DFA M1 accepts the string "aabb" because it ends in an accept state (q1).

e. No, DFA M1 does not accept the string "?" because there is no transition defined for the "?" input symbol in the given state diagram.

a. Start state: In DFA M1, the start state is q0. In DFA M2, the start state is q1.

b. Set of accept states: For DFA M1, the set of accept states is {q1}. In DFA M2, the set of accept states is {q2, q3}.

c. Sequence of states on input aabb:

- For DFA M1: q0 → q0 → q0 → q1 → q1

- For DFA M2: q1 → q1 → q3 → q3 → q2

d. -For DFA M1: Yes, the machine accepts the string aabb since it ends in an accept state (q1).

- For DFA M2: No, the machine does not accept the string aabb since it does not end in an accept state.

e.  For both DFA M1 and M2: No, the machine does not accept the string since there is no defined transition for the input  in either DFA, resulting in a non-accepting state.

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They are useful in providing larger frictional force.

The force produced by two surfaces coming into contact and sliding against one another is referred to as frictional force.

The following variables impact the frictional force: Surface roughness and the amount of force pressing them together have the biggest impact on these forces.

Football shoes have spikes or studs because they offer more frictional force when running on grass than regular shoes do.

The studs make it easier for players to move faster and change directions rapidly without slipping while also preventing them from slipping on the grass.

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The conservation of energy law similarly holds that energy cannot be created or destroyed.

That's what the fundamental law of thermodynamics says. It is only possible to change the form of energy; it cannot be created or destroyed. This is sometimes known as the rule of energy conversion or perhaps the law of energy conservation.

The two aforementioned principles were unified into one when Albert Einstein published the formula E= mc2 at the start of the 20th century, resulting in the formation of the Conservation Law of Mass-Energy, which asserts that the total quantity of both mass and energy in the universe remains constant.

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Explanation:

weight of the piano = mg

w = 99 x 10 =990 N

The value of the coefficient  is μ=0.18.

Find the value of this coefficient.​

The particles are in equilibrium, meaning the net force on them is zero.

Thus, repulsion due to their charge = friction due to the table.

As the equilibrium is limiting, friction reaches its maximum value.

\(\frac{kQ^{2} }{r^{2} }\)=μmg

\(k=9*10^{9} Nm^{2} C^{-2}\)The electrostatic constant \(Q=10^{-7} C\)  is the charge, and r=0.1m is the distance between the charges.

\(\frac{(9*10^{2})(10^{-7})^{2} }{(0.1)^{2} }\)=μ*\((5*10^{-3})(10)\)

Therefore, The answer is μ=0.18.

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Answer:

The distance is  \(z = \frac{1 + \sqrt{ \frac{k * q_2 }{ k * q_1}}}{s}\)

Explanation:

From the question we are told that

   The positive charges is  \(q_1 \ and \ q_2\)

   The distance of separation is  \(s\)

Generally at the point where the electric field is zero  would be a point where

The  electric field due to \(q_1\) =  The  electric field due to \(q_2\)

Generally the electric field due to \(q_1\) is mathematically represented as

     \(E_1 = \frac{k * q_1}{ z^2 }\)

Since we are taking our reference from \(q_1\) then the electric field due to \(q_2\) is mathematically represented as

     \(E_2 = \frac{k * q_2}{ (s- z)^2 }\)

So

     \(\frac{k * q_1}{ z^2 } = \frac{k * q_2}{ (s- z)^2 }\)

      \(k * q_1 * (s- z)^2= k * q_2 * z^2\)

      \([ \frac{s -z }{z} ]^2 = \frac{k * q_2 }{ k * q_1}\)

      \(\frac{s -z }{z} = \sqrt{ \frac{k * q_2 }{ k * q_1}}\)

     \(\frac{s}{z} - 1 = \sqrt{ \frac{k * q_2 }{ k * q_1}}\)

     \(z = \frac{1 + \sqrt{ \frac{k * q_2 }{ k * q_1}}}{s}\)

The atomic mass is the protons + the neutrons.

So your answer would be 5 + 6 = 11.

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Answer: 2.5 km

Explanation:

5/2 = 2.5 km

60/2 = 30 mins

Answer:

iiiiiiiiiiiiii8iiiiiiiiiiiii

When unpolarized light is reflected off a lake, it can be completely blocked when observed through a polarizer. The following statements that are correct include:

a. The E field in the reflected light is oscillating in a horizontal direction.

c. The E field and the B field in the reflected light are perpendicular to each other.

d. The axis of your polarizer is parallel to the water surface.

e. The axis of your polarizer is in the same plane as the plane defined by the incident and reflected beam.

f. The axis of your polarizer is parallel to the direction of the reflected beam.

Reflection is the phenomenon of light bouncing back when it falls on a surface. When light waves fall on a surface, they interact with the surface, and some of the energy in the wave is absorbed by the surface. Some of the energy is also reflected back in the same medium, and this reflected light carries the same characteristics as the incident light.

The reflected light is polarized, which means that it has an electric field that is oscillating in a horizontal direction. It is blocked by a polarizer because the axis of the polarizer is perpendicular to the direction of the electric field. Therefore, the E field and the B field in the reflected light are perpendicular to each other.

When the axis of the polarizer is parallel to the water surface, it blocks the reflected light because the electric field is polarized perpendicular to the axis of the polarizer. Therefore, the axis of your polarizer is parallel to the water surface.

The incident and reflected beams are in the same plane, and the axis of the polarizer is in the same plane as the incident and reflected beams. Therefore, the axis of your polarizer is in the same plane as the plane defined by the incident and reflected beam.

When the axis of the polarizer is parallel to the direction of the reflected beam, it blocks the reflected light because the electric field is polarized perpendicular to the axis of the polarizer. Therefore, the axis of your polarizer is parallel to the direction of the reflected beam.

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A pilot normally obtains the current altimeter setting during an IFR flight in class e airspace below 18,000 feet because ATC periodically advises the pilot of the proper altimeter setting.

When ATC provides a pilot with an altimeter reading, that pilot can then set his or her own altimeter to the same reading, ensuring that both pilots' displays reflect the same, precise height. The sub-scale of a pressure altimeter is adjusted to a certain atmospheric pressure that represents the height of an aircraft above a fixed reference surface. In the context of landing, that's crucial. So that we don't crash into any of the terrain in our route of flight and so that we can keep proper altitude separation from other aircraft as atmospheric pressure varies from place to place, pilots utilize altimeters.

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Nebulae are red because of the Balmer line, which is created when ionized hydrogen catches an electron and turns back into neutral hydrogen. Ionized hydrogen, which is abundant in nebulae.

In space, a supernova is a huge cloud of gas and dust. Some nebulae, including multiple nebulae, are made of gas and dust that have been released from the exploding of a dead star called a supernova. There are other nebulae that are star-forming regions.

The nebular theory proposes that a swirling cloud of dust, known as a nebula, composed primarily of light components, condensed into a planetary nebula, and eventually developed into a solar system made up of a star and planets in orbit.

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The protons and neutrons that make up the nucleus of an atom are collectively called nucleons. An isotope is a nucleus that has a specific combination of protons and neutrons.

Isotopes of an element have the same number of protons but different numbers of neutrons, which can result in different atomic masses. Isotopes can be stable or unstable, with unstable isotopes undergoing radioactive decay over time.

Some isotopes have important applications in various fields, such as carbon-14 used in radiocarbon dating and medical isotopes used in diagnosing and treating diseases. Understanding isotopes and their properties is crucial in chemistry, physics, and other related fields, as it allows us to better understand the behavior and characteristics of atoms and their interactions.

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Answer:

What is 250 °C in °F?

482

Fahrenheit = (1.8 times Celsius) + 32 .

No matter WHAT Celsius temperature you start with, you put it into that formula in place of the word "Celsius", and the formula gives you the Fahrenheit temperature.

It works for ANY Celsius temperature. So now, you never have to ask this question again.  

Answer: Find the answer in the explanation

Explanation:

The music playing on the radio will be heard through the sound waves coming from the radio.

The travelling wave will obey Newton's first law of motion which state that:

An object or particle will remain at rest or continue its linear motion in a straight line except an external force is applied.

The external force through wind could affect the travelling of the sound waves. Since the wave is longitudinal wave. That is, it needs a medium (air) for its propagation.

B. Lead is a conductor....

A dielectric fitting should be used in joining pipes of a water supply system when there is a need to prevent galvanic corrosion.

Galvanic corrosion occurs when two dissimilar metals come into contact with each other in the presence of an electrolyte, such as water. In a water supply system, different types of metals may be used for the pipes, such as copper and steel. When these metals come into contact, they can create a galvanic cell, which leads to corrosion and eventual damage to the pipes.

To prevent galvanic corrosion, a dielectric fitting is used. A dielectric fitting is made of a non-conductive material, such as plastic or rubber, and acts as a barrier between the dissimilar metals. It prevents direct contact between the metals, thus inhibiting the flow of electrical current and reducing the risk of corrosion.

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When a car moves around in a circle, the static friction force that it experience is Centripetal force.

Centripetal force is a type of force directed towards the center of the circle when an object moves in circular motion. The centripetal force allows an object to keep moving in a  circle.

Centripetal force is directly proportional to velocity squared of the object. It is given by:

F = mv²/r

m = mass, v = velocity, r = radius, F = centripetal force.

Given that m = 1000kg, v = 45 m/s, r = 60 m, hence:

F = 1000(45)²/60 = 33750 N

When a car moves around in a circle, the static friction force that it experience is Centripetal force.

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Cause: Energy transferred over time Effect: Power When energy is transferred over time, it results in the generation of power. Power is the rate at which work is done or energy is transferred, per unit of time.

The more energy that is transferred over time, the greater the power generated. Cause: Force applied to an object to change its position. Effect: Motion

When a force is applied to an object, it causes the object to move. Motion is a change in an object's position over time. The greater the force applied to the object, the greater the acceleration produced, and the faster the object will move.

Cause: Force moving an object over a distance

Effect: Work

When a force moves an object over a distance, it results in the generation of work. Work is the energy transferred to or from an object when a force is applied over a distance. The more force that is applied over a distance, the more work is done.

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Cause:-Energy transferred over time,Force applied to an object to change its position,Force moving an object over a distance

Effect:Power,Work,Motion

The Explanation are given as follows :-

Power is the rate at which work is done, or the amount of energy transferred over time. When energy is transferred over time, it can be used to perform work at a certain rate, which is power.

Work is the energy transferred when a force is applied to an object to change its position. When a force is applied to an object, work is done to move the object over a certain distance.

Motion is the change in position of an object over time due to a force moving it over a certain distance. When a force is applied to an object and work is done to move it, the object undergoes motion.

Work, power, and energy are related concepts in physics, but they are different in terms of their definitions and units of measurement.

Work is the transfer of energy that occurs when a force is applied to an object and the object is moved through a distance. The amount of work done is equal to the force applied multiplied by the distance over which the force is applied. The unit of work is joules (J).

Power is the rate at which work is done or energy is transferred. It is equal to the amount of work done divided by the time taken to do the work. The unit of power is watts (W).

Energy is the capacity to do work, or the ability to cause change. It is a scalar quantity that comes in different forms, such as kinetic energy (energy of motion), potential energy (energy stored in an object due to its position or state), thermal energy (energy associated with the temperature of a system), etc. The unit of energy is also joules (J).

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Answer:

36g

Explanation:

formula;

density=mass/volume

density*volume=mass

3*12=36g

hope this helps :D

Answer:

3.34g/cm

Explanation:

True. An object with no forces acting on it will continue to move with constant velocity. When there are no external forces acting on an object, its velocity does not change.

The object, on the other hand, maintains a steady motion with the same speed and direction. This is known as Newton's first law of motion, also known as the law of inertia. Newton's first law of motion states that an object at rest will remain at rest, and an object in motion will remain in motion at a steady velocity in a straight line until an external force acts upon it. This implies that if there is no net force acting on an object, it will remain stationary or continue to move at a constant velocity. Newton's first law of motion may be used to explain why drivers and passengers in a vehicle continue to move forward when the vehicle brakes abruptly, while objects in the car that aren't strapped down may go flying. According to Newton's first law of motion, an object in motion remains in motion at the same speed and in the same direction unless acted upon by an external force. Because the person's body is in motion, it will continue to move forward at the same speed as the car until an external force, such as the seatbelt or airbag, brings it to a stop.

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