can someone please help me with this question... thank u​

Answer:

Friction is the main factor which reduces the efficiency of a simple machine. Efficiency of a simple machine can be increased by reducing the friction. But oiling and greasing the machine is a useful way to increase the efficiency of a machine.

Explanation:

Because all machines lose input work to friction, one way to improve the efficiency of a machine is by reducing friction. Oil is used to reduce friction between the moving parts of car engines. The use of oil makes engines more efficient. Another machine that loses input work is a bicycle.

Answer:

Electricity is the set of physical phenomena associated with the presence and motion of matter that has a property of electric charge. Electricity is related to magnetism, both being part of the phenomenon of electromagnetism, as described by Maxwell's equations.

Answer:

nuclear battery to generate energy

Answer:

Moment is the product of force and its perpendicular distance from a point along its line of action.

The net moments on clockwise and anticlockwise is zero at a point.

The net force applied on a spanner handle is equal to the moment of the rotation

Answer:

SILEM B

Explanation:

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Answer:

D

Explanation:

why is so you don't go flying out of the car

Answer:

This is the types of energy transformation

Explanation:

hope it helps

Answer:

the answer for this is my.

Answer:time taken is 6 seconds

Explanation:

Answer: 2.45 seconds

Explanation: Acceleration a = -5, distance s = 15, time  = ?.

Final  velocity = v =  0.

We need to use the equations of motion under constant acceleration.

v^2 = u^2 + 2as       where u is the initial velocity

0 = u^2 + 2*-5*15

u^2 = 150

so u = √150

Now we use v = u + at:

0 = √150 - 5t

t = √150/5

t = 2.45 seconds.

Answer:

40 metros en 10 segundos.

Explicación:

Una grúa está levantando una caja de 1000 kg atada a una cadena y la caja, que inicialmente está en reposo, aumenta su velocidad en 4 m / s por segundo, por lo que si la región de colocación está a 40 metros de distancia, la grúa tarda 10 segundos en completar el proceso. tarea de movimiento y colocación de la caja. La grúa se utiliza para levantar y mover cargas pesadas, máquinas, materiales y mercancías para diferentes propósitos. Entonces el trabajo realizado por la grúa depende de la velocidad y la distancia de colocación.

Answer:

1300 m/s

Explanation:

Applying,

v = λf/2............... Equation 1

Where v = velocity or speed of wave, f = frequency of wave, λ = wavelength of wave.

From the question,

Given: f = 325 Hz, λ = (12×2/3) = 8 m

Substitute these values into equation 2

v = 325(8)/2

v = 1300 m/s.

Hence the standing wave speed is 1300 m/s

The right option is 1300 m/s

The electric force between two charges is:

F = (9 x 10⁹) Q₁ Q₂ / D²

F is the force, in Newtons

Q₁ and Q₂ are the two charges, in Coulombs

D is the distance between them, in meters

For these two particles:

F = (9 x 10⁹) (0.35) (0.35) / (1)²

F = (9 x 0.35 x 0.35 x 10⁹) / (1)

F = 1.10 x 10⁹  Newtons

Thatsa lotta force . . . like 124 thousand tons !

The reason it's so big is because the charges in this question are so big ... 0.35 Coulombs each.  1 Coulomb is a huge amount of charge.

Each of the particles feels the same force, pushing it away from the other particle.  (The electric force between two charges is always the same in both directions, just like the gravitational force between two masses.)

Acc. to columb's law;

Clearly, from the question you have:

Now just put them up in the formula:

F = k × Q1Q2/r²

F = 9 × 10⁹ × 0.35 × 0.35/1 × 10-¹⁰

F = 9 × 10⁹ × 35 × 35/ 10-¹⁰ × 100 × 100

F = 9 × 10⁹ × 35 × 35/ 10-¹⁰ × 10⁴

F = 9 × 10⁹ × 35 × 35/ 10-⁶

F = 9 × 10⁹+⁶ × 1225

F = 11025 × 10¹⁵

Hope this helps you.

Answer:

Mechanical energy in Joules:

348,041,980

The total mechanical energy of the airplane is equal to 348,041,980 Joules.

Given the following data:

Scientific data:

To calculate the total mechanical energy of the airplane:

The total mechanical energy possessed by this airplane is equal to the sum of both the potential energy and kinetic energy at the given altitude.

Mathematically, the total mechanical energy is given by this formula:

[tex]E = \frac{1}{2}mv^2 + mgh[/tex]

Substituting the given parameters into the formula, we have;

[tex]E = \frac{1}{2}\times 14300 \times 214^2 + 14300 \times 9.8 \times 147\\\\E=7150 \times 45796 + 20600580\\\\E= 327441400 + 20600580[/tex]

E = 348,041,980 Joules.

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Answer:

Supongo que queremos determinar la carga de la carga de prueba.

Sabemos que la fuerza culombiana entre dos cargas q₁ y q₂, separadas por una distancia R, está dada por:

[tex]F = k_c*\frac{|q_1*q_2|}{R^2}[/tex]

Aislandolo para una de las cargas, obtenemos:

[tex]\frac{F*R^2}{kc*|q_1|} =|q_2|[/tex]

En este caso sabemos:

fuerza atractiva, por lo que los signos de las cargas son opuestos.

q₁  = 5 mC

R = 35cm

F = 1.5 N

Kc = 9*10^9 N*m^2/C^2

Un primer paso, seria reescribir todos los valores en las mismas unidades.

Sabiendo que:

100cm = 1m

R = 35cm = (35/100) m = 0.35m

Y sabiendo que:

1mc = 1*10^(-6) C

Entonces:

q₁  = 5 mC = 5*1*10^(-6) C = 5*10^(-6) C

Ahora podemos reemplazar esos valores en la ecuación de la fuerza, para obtener el valor de la otra carga:

[tex]\frac{15N*(0.35m)^2}{(9*10^9 N*m^2/C^2)*5*10^{-6}C} =|q_2| = 4.08*10^{-5} C[/tex]

Y recordar que las cargas tienen signo opuesto, entonces la carga de la carga de prueba es:

q₂ = -4.08*10^-5 C

Answer:

It depends on how big the hole is.

Explanation:

If the hole is too big, the water will fall freely out of the cup. However, if it is just a small opening (from a needle, pencil/pen tip, etc.) the water pressure will be able to hold in the water.

Answer:

the rotational kinetic energy of the disk is 5,133.375 J

Explanation:

Given;

mass of the disk, m = 27 kg

radius of the disk, r = 1.3 m

angular speed, ω = 15 rad/s

The rotational kinetic energy of the disk is calculated as;

[tex]K.E_{rot} = \frac{1}{2}I \omega^2\\\\ where;\\I \ is \ moment \ of \ inertia\\\\K.E_{rot} = \frac{1}{2} \times (mr^2) \times \omega ^2\\\\ K.E_{rot} = \frac{1}{2} \times (27\times 1.3^2) \times \ 15^2\\\\K.E_{rot} = 5,133.375 \ J[/tex]

Therefore, the rotational kinetic energy of the disk is 5,133.375 J

[tex]\huge\colorbox{purple}A\colorbox{blue}n\colorbox{purple}s\colorbox{blue}w\colorbox{purple}e\colorbox{blue}r [/tex]

[tex]\color{Violet}\rm{Hopeithelps!シ︎}[/tex]

uhm i think TRUE✨

I'm not sure hehe.

__________________________________

“The Lord your God is in your midst — a warrior bringing victory. He will create calm with his love; he will rejoice over you with singing.” — Zephaniah 3:17 ❤

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Potential difference is measured in joules​ is true statement.

The difference in charge carriers' energy between two places in a circuit is known as the potential difference.

Voltage is another name for potential difference (p.d.), which is expressed in volts (V). When charge carriers move through electrical components in a circuit, energy is delivered to those parts. To determine the potential difference, we use a voltmeter (or voltage).

The amount of current multiplied by the resistance equals the potential difference, which is the same as voltage. One Coulomb of charge uses one Joule of energy to move between two points in a circuit, which is equal to a potential difference of one Volt.

Therefore, Potential difference is measured in joules​ is true statement.

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Answer:

One simple explanation is that planets move, while stars remained fixed in the sky. You can observe a planet's orbit, but a star will stay in the same position.

Explanation:

Stars emit their own light due to thermonuclear fusion while planets have fixed orbits and they do not have their own light.

A star can be described as an astronomical body that possesses a light that causes it to reflect the light. A planet can be described as a fixed celestial body with a fixed path that spins on its own axis and reflects the light from an external source. Planets do not have an internal light source and receive light from external sources such as the Sun.

Stars have incredibly hot high temperatures while planets have relatively low temperatures. Stars produce their own light but planets are incapable of producing their own light.

Stars exhibit the unique effect of twinkling in the sky while planets do not exhibit the twinkling effect. The position of stars changes but can be seen only after a long time while planets in orbits change their positions constantly.

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Answer:

reactants react with eachother

Explanation:

yep

Answer:Its B

Explanation:Trust Me i done This Before

Answer:

Explanation:

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Answer: C.

The buoyant force is stronger than the force of gravity.

Explanation:because I did it

Answer:200,000

Explanation:

p=w/t

200=1000/t

t=200*1000

time=200,000

Answer:

Explanation:

This is very straightforward, except that we need the mass in kg and it's in g. So we have to convert first, using the fact that there are 1000g in 1 kg:

[tex]200g*\frac{1kg}{1000g}=.200kg[/tex] and now we're ready to solve your problem.

F = ma and

120 = .200a so

a = 6.0 × 10² (which is 600 m/s/s)

The component of the crate's weight that is parallel to the ramp is the only force that acts in the direction of the crate's displacement. This component has a magnitude of

F = mg sin(20.0°) = (15.0 kg) (9.81 m/s^2) sin(20.0°) ≈ 50.3 N

Then the work done by this force on the crate as it slides down the ramp is

W = F d = (50.3 N) (2.0 m) ≈ 101 J

The work-energy theorem says that the total work done on the crate is equal to the change in its kinetic energy. Since it starts at rest, its initial kinetic energy is 0, so

W = K = 1/2 mv ^2

Solve for v :

v = √(2W/m) = √(2 (101 J) / (2.0 m)) ≈ 10.0 m/s

Answer:

Science is a collection of knowledge about the natural world, but it is also the process of discovering how the natural world works. It is supported by evidence.

Answer: The correct answer is C). Science is a collection of knowledge about the natural world, but it is also the process of discovering how the natural world works.

Explanation:

Answer:

400J

Explanation:

The work done by the force on the object is 80 J.

The work is defined by the product of force and displacement. Its unit of measurement is joule. And the formula is,

Work = Force ×Displacement

Or mathematically it is W = F.d

     [tex]F = 20N , d = 4m\\[/tex]

       W = 20 × 4

       W = 80 J

Hence the work done by the force is 80J.

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Answer:

Total momentum of both is 16250 kgm/s