If a wave has a speed of 200 m/s and a frequency of 25Hz, what is the wavelength of the wave?

Answer:

Nicolaus Copernicus

Explanation:

With the development of the heliocentric model by Nicolaus Copernicus in the 16th century, the Sun was believed to be the center of the Universe, with the planets (including Earth) and stars orbiting it.

#4 copernicus he was the first scientist

Answer:

a) The distance each child ran is approximately 0.232 m

b) The angular acceleration is 0.21[tex]\overline 6[/tex] rad/s²

Explanation:

The given parameters of the merry-go-round are;

The mass of the merry-go-round, m = 240-kg

The diameter of the merry-go-round, d = 4.00 m

The number of children pushing tangentially on the merry-go round = Four children

The spinning rate of the merry-go-round, n = 2.14 rev/minute

a) Given that the force exerted by each child = 26 N, we have;

The total force applied by the four children, F = 26 N × 4 = 104 N

The tangential acceleration, [tex]a_t[/tex] = F/m = 104 N/240-kg = 0.4[tex]\overline 3[/tex] m/s²

The angular acceleration, α = [tex]a_t[/tex]/r

Where, the radius of the merry-go-round, r = d/2

∴ r = 4.00 m/2 = 2.00 m

α = 0.4[tex]\overline 3[/tex] m/s²/(2.00 m) = 0.21[tex]\overline 6[/tex] rad/s²

We have;

ω² = ω₀² + 2·α·Δθ

The merry-go-round starts from rest, therefore; ω₀ = 0 rad/s

ω² = 2·α·Δθ

Δθ = ω²/(2·α)

n = 2.14 rev/minute

∴ ω = 2·π×2.14/60 rad/s ≈ 0.22410 rad/s

∴ Δθ = (0.22410 rad/s)²/(2 × 0.21[tex]\overline 6[/tex] rad/s²) ≈ 0.11589 rad

Therefore, the angle each child ran, θ = 0.11589 rad

The distance each child ran = r·θ

∴ The distance each child ran = 2.00 m × 0.11589 rad ≈ 0.232 m

b) From part 'a' above, the tangential acceleration, [tex]a_t[/tex] = 0.4[tex]\overline 3[/tex] m/s²

Angular acceleration, α = [tex]a_t[/tex]/r

∴ α = 0.4[tex]\overline 3[/tex] m/s²/(2.00 m) = 0.21[tex]\overline 6[/tex] rad/s²

The angular acceleration = 0.21[tex]\overline 6[/tex] rad/s²

Answer:

Explanation:

Answer: None of the above I got it right on my test

Answer:

B,C,E

Explanation:

Answer:

Explanation:

A convex mirror is used in automobiles to have a Clear View of the traffic behind because they give an erect, virtual, full size diminished image of distant objects with a wider field of view.

hope it helps :)

Answer:

The magnitude of swing's tension is 0.71 N.

Explanation:

Given;

mass of the ball, m = 18 g = 0.018 kg

angular speed of the ball, ω = 1 rev/s

radius of the motion, r = 1 m

Angular speed in rad/s is calculated as follows;

[tex]\omega = \frac{2\pi \ rad}{rev} \times \frac{1 \ rev}{s} \\\\\omega = 2 \pi \ rad/s[/tex]

Linear speed of the ball, v;

v = ωr

v = 2π x 1

v = 2π  m/s

The magnitude of swing's tension is calculated as the centripetal force keeping the ball in circular motion.

[tex]F_c =T = \frac{mv^2}{r} \\\\T= \frac{0.018 \ \times (2\pi )^2}{1} \\\\T = 0.71 \ N[/tex]

Therefore, the magnitude of swing's tension is 0.71 N.

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Answer:

The correct answer is D.

Explanation:

Im pritty sure;)

Answer:

D

Explanation:

edge

Answer:

9.2m/s sir Thank me later

Answer:

Given

mass (m) =985 ☓ 0.001 , 0.985 kg

velocity (v) =3.82m/s

kinetic energy(k. e) =?

Form equation

[tex]k.e = \frac{1}{2} mv {}^{2} \\ = \frac{1}{2} \times 0.985 \times 3.82 {}^{2} \\ = 7.1868kj \\ kinetic \: enegy = 7.1868kj[/tex]

I hope this help

Answer:

See explanation below

Explanation:

Recall that the force of static friction is the product of the coefficient of static friction between surface and object, times the force applied perpendicular to the surface.

In our case, that perpendicular force has magnitude equal to the centripetal acceleration times the mass m of the block. The centripetal acceleration is defined as the quotient between the square of the tangential velocity divided by the radius at which the rotating mass is located (in our case R).

In order to estimate the tangential velocity given the angular velocity ω, we simply multiply it by R:  

[tex]v_t=\omega\,R[/tex]

and therefore the force acting on the surface of the cylinder is:

[tex]F=m\,*\,a_c=m\,*\,\frac{v_t^2}{R} =m\,*\, \frac{\omega^2\,R^2}{R} =m\,*\,\omega^2\,*R[/tex]

The force of friction between the block and the inner wall of the hollow cylinder will then be:  [tex]f=\mu\, *\,m\,*\omega^2\,*\,R[/tex]

In order for this force of static friction to be able to prevent the mass to slide down due to gravity, we need that the friction force is at least equal to the gravitational force. That is:

[tex]f\geq F_g\\f\geq m\,*\,g\\\mu\,*\,m\,*\,\omega^2\,*\,R\geq m\,*\,g\\\mu\geq \frac{g}{\omega^2\,*\,R}[/tex]

The force of static friction to prevent the mass to slide down due to gravity, the friction force is must be equal or greater than to the gravitational force.

The force of static friction is the product of the coefficient of static friction between surface,and force applied perpendicular to the surface.

The tangential velocity,

[tex]\bold {V_t = \omega R}[/tex]

So,  the force acting on the surface of the cylinder,

[tex]\bold {F= m\times a_c}\\\\\bold {F= m \times \dfrac {V_t^2 }{R}}\\\\\bold {F = m \times \dfrac {\omega ^2R2}{R}}}\\\\\bold {F = m \times \omega ^2 \times R}[/tex]

The force of friction between the block and the inner wall of the hollow cylinder,

[tex]\bold {F_f = \mu \times m \times \omega ^2 \times R}[/tex]

Therefore, the force of static friction to prevent the mass to slide down due to gravity, the friction force is must be equal or grater than to the gravitational force.

To know more about static friction,

https://brainly.com/question/8790433

Answer:

Food is potential energy because as our bodies digest it then the stored energy will turn into energy that helps us to move and grow

Explanation:

i hope this helps

We have no idea WHAT the object is.  

But if the 4.6 N is the ONLY force acting on it (including friction), then its mass is 282.2 grams.

Answer:

the answer is 12 second easy

Answer:

Metals is defined as the solid material which shows lustrous appearance and is a good conductor of electricity while non-metal are defined as the material which are not in solid form, have no luster and are bad conductor of electricity.

Two metals which are so unusual are mercury and sodium because metals are generally solid bur mercury is present in liquid form and metals are hard but sodium is so soft.

Two non-metals which are so unusual are diamond and iodine because diamond is opposite to the property of non-metals that is hard and iodine shows lustrous appearance whereas non-metals are non- lustrous.

Hence, Two example of metals are mercury and sodium and two example of non-metals are diamond and iodine.

Answer:

the work done on the car is 7,500 J.

Explanation:

Given;

distance traveled by the car, d = 150 m

applied force, F = 50 N

The work done on the car is calculated as;

W = F x d

W = 50 N x 150 m

W = 7,500 J

Therefore, the work done on the car is 7,500 J.

Answer:

is this math of science

Explanation:

Answer:

there should be 4 2 levers and 2 wheels

Explanation:

Work = (force) x (distance)

Work = (325 N) x (15 m)

Work = 4,875 Joules

Answer:

Objetos que se encuentran en movimiento:

1) Un automóvil pasando por la calle.

2) Una crustácea que se acerca a mi casa.

3) Un avión volando en el cielo.

4) Un repartidor de comida desplazándose en una bicicleta.

5) Las aspas del ventilador en rotación.

6) Una hojarasca afuera de la casa.

7) La puerta de mi habitación abrirse.

8) Un mosquito entrando por la ventana.

9) Un metrónomo en movimiento.

10) Las hojas de mi cuaderno siendo agitadas por la brisa impulsada por el ventilador.

Objetos que se encuentran en reposo:

1) El semáforo de la esquina.

2) El automóvil de mi madre.

3) Las sillas del comedor.

4) Un jarrón de porcelana.

5) La nevera de la cocina.

6) La mesa de noche de mi habitación.

7) El automóvil de policía en la calle.

8) La impresora de memes.

9) El estante de libros.

10) El cesto de galletas.

Un objeto está en reposo si y solo si la posición de todos sus puntos no ha cambiado con respecto a la posición inicial en el tiempo. Los cambios de posición se manifiestan mediante tres formas:

(i) Traslación.

(ii) Rotación.

(iii) Deformación.

Explanation:

Objetos que se encuentran en movimiento:

1) Un automóvil pasando por la calle.

2) Una crustácea que se acerca a mi casa.

3) Un avión volando en el cielo.

4) Un repartidor de comida desplazándose en una bicicleta.

5) Las aspas del ventilador en rotación.

6) Una hojarasca afuera de la casa.

7) La puerta de mi habitación abrirse.

8) Un mosquito entrando por la ventana.

9) Un metrónomo en movimiento.

10) Las hojas de mi cuaderno siendo agitadas por la brisa impulsada por el ventilador.

Objetos que se encuentran en reposo:

1) El semáforo de la esquina.

2) El automóvil de mi madre.

3) Las sillas del comedor.

4) Un jarrón de porcelana.

5) La nevera de la cocina.

6) La mesa de noche de mi habitación.

7) El automóvil de policía en la calle.

8) La impresora de memes.

9) El estante de libros.

10) El cesto de galletas.

Un objeto está en reposo si y solo si la posición de todos sus puntos no ha cambiado con respecto a la posición inicial en el tiempo. Los cambios de posición se manifiestan mediante tres formas:

(i) Traslación.

(ii) Rotación.

(iii) Deformación.

Answer:

to dim lights, or to control speed in a engine

Explanation:

Answer:

to something in action there is always a equal and opposite reaction. Like if you bounce a bounce ball on the ground, it will bounce back.

Explanation:

Answer: The microwaves are reflected within the metal interior of the oven where they are absorbed by food. Microwaves cause water molecules in food to vibrate, producing heat that cooks the food.

Explanation:

Answer:

C. Sternal Head, Clavicular Head

Answer:

Ik its mass and velocity but not sure if its also shape

Its shape of an object that is not needed to find the kinetic energy of an object.

The kinetic energy of an object is the energy that it possesses due to its motion. It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity.

To learn more about kinetic energy here

https://brainly.com/question/12669551

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Answer:

1. Equal and opposite reaction

2. Pairs

3. That is equal

Explanation:

I have tried my best but without knowing your curriculum or the possible answers it is difficult to know exactly what the answer would be... :(

Please mark as branliest ;)

- Hope this helped!

Answer:

increases its amplitude.

Explanation:

Answer:

30 30 30 yuhhhhhhhhhhhh

Answer:

There is no great force, the force exerted by the Earth on the Sun, and the force exerted by the Sun on the Earth are equal

Explanation:

By definition...