What is the unit for electrical power?
O volt (V)
O joule (J)
O kilowatt-hour (kWh)
O watt (W)

The distance to the Earth at the moment of the landing craft's launch as measured by the aliens is 0.16 light years.

To find the answer, we have to know about the Lorentz transformation.

It is given that, an alien spaceship traveling at 0.600 c toward the Earth, in the same direction the landing craft travels with a speed of 0.800 c relative to the mother ship. We have to find the distance to the Earth at the moment of the landing craft's launch as measured by the aliens.

        [tex]L=L_0\sqrt{1-\frac{V^2}{c^2} } =0.2ly\sqrt{1-\frac{(0.6c)^2}{c^2} }=0.2ly\sqrt{1-0.36}= 0.16ly[/tex]

Thus, we can conclude that, the distance to the Earth at the moment of the landing craft's launch as measured by the aliens is 0.16 light years.

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The direction of the field the current creates at a point on the wall outside the frame to the right is horizontally towards you.

The current will flow from the bottom of the wire to the top if the magnetic field around a vertical electrical wire is counterclockwise in direction.

A magnetic field, a vector field that describes the magnetic influence on moving electric charges, electric currents, and magnetic materials. When a charge moves through a magnetic field, a force that is perpendicular to both its own velocity and the magnetic field operates on it.

A permanent magnet's magnetic field pulls on ferromagnetic materials like iron and draws or repels other magnets. Since the direction and strength of a magnetic field can vary depending on the location, it can be mathematically described by a function that gives each point a vector.

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Answer:

Explanation:

The strength of the gravitational force between two objects depends on two factors, mass and distance. the force of gravity the masses exert on each other. If one of the masses is doubled, the force of gravity between the objects is doubled.

The answer is C, as it states it's made of ONLY carbon atoms, not any others.

The answer is also A, because Graphite is still considered a compound.

A pencil "lead" is actually made of graphite. graphite is made exclusively of carbon atoms. The two terms that best describe graphite are pure substance and element. The correct options are options (c) and (d).

Graphite is considered a pure substance because it consists solely of carbon atoms. It is not a mixture because it does not contain different types of atoms or compounds.

Additionally, graphite is classified as an element because it is composed of only one type of atom, carbon.

Therefore, the correct answer is C. pure substance and D. element.

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Answer:

if you dont give me a question I can't answer sorry

1) Clapping your hands - Energy is converted from mechanical energy to sound energy

2) Turning on a light - Energy is converted from electrical energy to heat and light energy

Energy is converted from one form to another and it neither created nor destroyed. This is the first law of thermodynamics. This law means that energy does not get lost in the system. We can not have the energy in the system just suddenly vanish into the thin air. It must have to change from one form to the next.

Now we know that the conversion of energy from one form to the next is not a hundred percent efficient process, some energy may ne lost on the way! This is the statement that we could call the second law of thermodynamics.

Let us look at the energy conversions in the following cases;

1) Clapping your hands - Energy is converted from mechanical energy to sound energy

2) Turning on a light - Energy is converted from electrical energy to heat and light energy

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Answer:

9

Explanation:

about

The speedboat momentum is 19,500 kg.m/s.

We need to know about momentum to solve this problem. Momentum can be defined as the degree of difficulty to stop a moving object. It can be determined by

P = m . v

where P is momentum (kgm/s), m is mass (kg) and v is velocity (m/s).

From the question above, we know that:

m = 1500 kg

v = 13 m / s

By substituting the given parameters, we can calculate the momentum

P = m . v

P = 1500 . 13

P = 19,500 kg . m / s

Hence, the speedboat momentum is 19,500 kg.m/s.

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Answer:19,500 kg

Explanation:your welcome!:)

Answer:

Molecules are made up of atoms that are held together by chemical bonds. These bonds form as a result of the sharing or exchange of electrons among atoms. The atoms of certain elements readily bond with other atoms to form molecules. ... The element helium is a one-atom molecule. I hope this helps :)

Answer:

atoms held together by chemical bonds

Explanation:

Only elementary wavelength of the string wave is same for all six strings that is choice (b) .

a ) every note includes a totally different harmonic (notes E, B, G, D, A, E).

b) Correct. The wavelength depends solely on the chord length  and boundary conditions and is that the same for all six strings.

c) Corresponds to the basic tone, since the basic wavelength of the radiated sound varies from string to string.

d) String wave rate depends on the mass density and tension of the string. All half-dozen strings square measure totally different, therefore the wave speed is additionally totally different.

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Answer:

True

Explanation:

It is proved that the speed of the light measured in the laboratory frame is , u =c/n(1+ nv/c)/(1+ v/nc) .

Given ,

The motion of a transparent medium influences the speed of light .

The water moves with speed v in a horizontal pipe .

Assume that the light travels in the same direction as the water moves .

The speed of the light with respect to the water is c/n

Where n = 1.33 is the refractive index of water .

Let us assume ,

u' be the speed of light in water , in the frame moving with the water .

u' is related to the refractive index of water ,n as :

u'=c/n

where , c is the speed of light .

let , u be the speed of light in water in the lab frame .

Now , u and u' are related as : u = (u'+ v )/(1+ u'v/c^2)

Here v is the speed of water in the horizontal pipe .

we know the value of u' , so by substituting the value , we will get ,

u= (c/n+ v)/(1+cv/nc^2)

u= c/n(1+ nv/c)/(1+v/nc)

Hence , it is proved that the speed of the light measured in the laboratory frame is , u =c/n(1+ nv/c)/(1+ v/nc) .

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Answer:

You should weigh about 16 pounds.

Explanation:

To find this, you need to find your weight and divide it by 6 to find your weight on the moon.

Answer:

whichever teacher gave you this question is a legend

Explanation:

The kangaroo's minimum vertical speed when it leaves the ground is 5.94 m/s

The following data were obtained from the question given above:

We can determine the inintial velocity of the kangaroo as follow:

v² = u² – 2gh (since the ball is going against gravity)

0² = u² – (2 × 9.8 × 1.8)

0 = u² – 35.28

Collect like terms

u² = 0 + 35.28

u² = 35.28

Take the square root of both side

u = √35.28

u = 5.94 m/s

From the above calculation, we can conclude that the minimum vertical speed of the kangaroo when it leaves the ground is 5.94 m/s

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The phenomenon that is occurring is depicted in fig. Induction can be used to provide an explanation for this. As seen in Fig., when a negatively charged plastic rod is pushed close to a metal rod that is initially unaltered, the metal rod's left end picks up positive charges while the right end will pick up negative charges as a result of induction. when the empty metal ball is brought close to the metal rod's right end. The ball's near face subsequently develops a positive charge as a result of induction, and this positive charge attracts the rod since opposite charges are attracted to one another.

Electromagnetic induction, often known as induction, is the technique of creating electrical current in a conductor by exposing the conductor to a fluctuating magnetic field. Because the magnetic field is thought to have induced the current in the conductor, it is known as induction.

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The system of linear equations representing the above situation are -

y = 1.17x + 2.60

y = 0.59x + 5

The graph plotted shows the point of intersection of two lines which is the common solution of this system of equations. (Graph is attached at the end).

We have two taxi services for a ride to airport.

We have to write the system of linear equations to represent the situation.

In algebra, a system of equations comprises two or more equations and seeks common solutions to the equations.

According to the question, we have -

Assume the distance between your home and airport is x miles and the total fare is $y.

For friendly's cab company -

for  [tex]$\frac{1}{6}[/tex]  of a mile or 0.17 mile = $0.20

for 1 mile = $ (0.20/0.17)

for x miles = $ (0.20 / 0.17)x

Now, the following equation represents the charges scheme for friendly's cab company -

y = 2.60 + 1.17x

y = 1.17x + 2.60

For Anderson's taxi company -

for  [tex]$\frac{1}{6}[/tex]  of a mile or 0.17 mile = $0.10

for 1 mile = $ (0.10/0.17)

for x miles = $ (0.10 / 0.17)x

Now, the following equation represents the charges scheme for Anderson's taxi company -

y = 5 + 0.59x

y = 0.59x + 5

Hence, the system of linear equations representing the above situation are -

y = 1.17x + 2.60

y = 0.59x + 5

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[ The question given is not complete. The complete question in the image is attached below after the plotted graph]

By using the thrust force, the acceleration is  0.001 m/s².

We need to know about force to solve this problem. According to second Newton's Law, the force applied to an object will be proportional to mass and acceleration. Hence, it can be written as

F = m . a

where F is force, m is mass and a is acceleration

From the question above, we know that

F = 1 N

m = 1000 kg

By substituting the given parameters, we can calculate the acceleration

F = m . a

1 = 1000 . a

a = 1/1000

a = 0.001 m/s²

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The air particles will vibrate both in rightward and leftward direction as the a longitudinal sound wave travels from left to right through the air in a room.

A sound wave is the pattern of disruption brought on by the movement of energy moving through a medium as it propagates away from the source of the sound (such as air, water, or any other liquid or solid matter).

Pressure waves are produced when an object vibrates, such as a ringing phone, and these waves are known as sound waves. The surrounding medium's particles are disturbed by the pressure wave, and those particles disturb the particles next to them, and so on.

Like ocean waves, the disturbance's pattern causes outward movement in all directions. Usually in all directions and with decreased intensity as it gets further away from the source, the wave transmits the sound energy through the medium.

At least as far back as the first century B.C., people have believed that sound travels in waves. Both the Roman philosopher Boethius and the Roman architect and engineer Vitruvius proposed that sound might travel in waves. Galileo Galilei is credited as being the founder of the current science of sound (1564-1642).

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Answer:

Work=force × distance

=45×15

=675

Explanation:

need thanks and make me brainiest if it helps you

The intensity that results if the frequency is increased to for while a constant displacement amplitude is  I = (pv'²s²v)/8π²

The amplitude of a periodic variable is a measure of its change over a single period (such as a period of time or space). The amplitude of an aperiodic signal is its magnitude relative to a reference value. Amplitude has several definitions, all of which are functions of the magnitude of the difference between extreme values ​​of a variable. In older texts, the phase of a periodic function is sometimes called the amplitude. Peak amplitude is commonly used in audio system measurements, telecommunications, etc. A measurand is a signal that oscillates above and below a reference value but is not sinusoidal. If the reference is zero, this is the maximum absolute value of the signal. If the reference is the mean (DC component), the peak amplitude is the maximum absolute difference from that reference.

I = 1/2 pw²s²v = (1/8π)pv²s²v

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Answer:

D. μs = Fs/Fn

Explanation:

The static friction coefficient, is always less than 1, for this reason, the friction force will always be less than the force of the body weight.

Answer:

D is correct. I just did it!!

Explanation:

Answer

v= 1/R mark me brainliest pls

Answer:

F = Δ(mv)/Δt = ma

Explanation:

Newton's second law states that the force exerted on an object is equal to the rate of change of its momentum.

Let F represent force and p momentum and p = mv where m = mass and v = velocity

This implies that F = Δp/Δt = Δ(mv)/Δt if the mass is constant, we have

F = mΔv/Δt and we know that acceleration, a = Δv/Δt

So, F = ma which is Newton's second Law.

Answer:

25000w

Explanation:

P=Fxs

p=500×50

p=25000 watts

The radius of the electrons is 2.14 × 10⁻⁵ m.

A magnetic field, often known as a vector field, describes the magnetic influence on moving electric charges, electric currents, and magnetic materials. A force acting on a charge while it travels through a magnetic field is perpendicular to both the charge's motion and the magnetic field.

Electrons go downward and positive ions move upward in a long, straight, vertical lightning stroke, creating a current of magnitude I = 20.0 kA.

The speed of the electron through the air if v = 300 m/s at r = 50 m east from the stroke's center.

Let the magnetic force be F, and B be the magnetic field.

Counterclockwise horizontal arcs of field lines are produced by the upward lightning current.

Then,

[tex]B = \frac{\mu_{0} I}{2 \pi r}[/tex]

[tex]B =\frac{4\pi \times 10^{-7} \times 20 \times 10^{-3}}{2 \pi(50)}[/tex]

B = 8 × 10⁻⁵ T north by the right-hand rule.

Then the radius of the electron will be:

r = mv / qB

[tex]r = \frac{(9.11 \times 10^{-31}) \times (300)}{(1.6 \times 10^{-19})(8 \times 10^{-5})}[/tex]

r = 2.14 × 10⁻⁵ m

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The correct answer is :

Mirror Parabola A mirror with a parabola-shaped reflecting surface is referred to as a parabolic mirror. The mirror is employed in search lights because it can precisely converge a broad parallel beam of light at the focus. Therefore, even at a great distance, the intensity of the reflected beam is unaffected.

Parabolic In search lights, concave mirrors with sizable apertures are utilized. For searching items in search light, we require a powerful parallel beam of light. The reflected rays from an object placed at a concave mirror's focus are parallel to one another and likewise parallel to the main axis. So, we position a light source at the concave mirror's focal point.

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The angle he should throw the second snowball to make it hit the same point as the first is 27⁰.

The range of the projectile is the distance traveled by a projectile in the horizontal direction.

There is no acceleration in this direction since gravity only acts vertically.

The range of a projectile is given as;

R = u²sin(2θ) / g

where;

For the range of a projectile the angle of projection is related in the following equation.

when the initial angle of projection = θ

new angle of projection so that it will have the same range =  90 - θ

new angle = 90 - 63⁰ = 27⁰

check;

sin(2 x 63) = sin(2 x 27) = 0.809

Thus, the angle he should throw the second snowball to make it hit the same point as the first is 27⁰.

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Simple pendulum takes 0.01 s to reach the maximum displacement from the equilibrium position, so it's frequency equals to 100 Hz

The time period of a simple pendulum: It is defined as the time taken by the pendulum to finish one full oscillation and is denoted by “T”. The amplitude of simple pendulum: It is defined as the distance travelled by the pendulum from the equilibrium position to one side.

The frequency of the pendulum defines how many times the pendulum moves back and forth in a specific period of time

time period of simple pendulum = 1 / frequency

given

time period = 0.01 second

frequency = 1 / 0.01

                 = 100 Hz

correct answer will be d) 100 HZ​

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Answer:if 1 m = 100 cm then there should be 200 cm in m^2

Explanation: