PLEASE HELP ME I AM TIMED!

The sound is perceived as louder if the amplitude increases, and softer if the amplitude decreases.  As the amplitude of the sound wave increases, the intensity of the sound increases. Sounds with higher intensities are perceived to be louder.

Answer:

C) Unscrew one light. If the other lights turn off, it's a series circuit.

Explanation:

THIS IS THE COMPLETE QUESTION BELOW;

A strand of 10 lights is plugged into an outlet. How can you determine if the lights are connected in series or parallel? A) Unscrew one light. If the other lights stay on, it's a series circuit. B) Unplug the strand. If the first light stays on, it's a series circuit. C) Unscrew one light. If the other lights turn off, it's a series circuit. D) Cut the strand in half. If the plugged in half stays on, it's a series circuit.

SERIES CIRCUIT

In this circuit, the components there are in the same path, the entire circuit has the same current, each of the components posses different voltage drop. Hence, failure of one components to work, there will be break in entire circuit then other components cease to work.

PARALLEL CIRCUIT

This circuit has equal voltage drop across all the components, any problem in a component will not has effect on other components.

Therefore, if one want to determine if a light connection is in series or in parallel, one of the light can be unplugged if others stop working it means it's series, if other works it's parallel.

Answer:

V = -0.4 m/s

Explanation:

Given that,

Mass of cart 1, m₁ = 3 kg

Speed of cart 1, v₁ = 2 m/s

Mass of cart 2, m₂ = 2 kg

Speed of cart 2, v₂ = -4 m/s (left)

aWe need to find the velocity of the carts after the collision if they stick together. Let the common speed be V. Using the law of conservation of momentum to find it such that,

[tex]m_1v_1+m_2v_2=(m_1+m_2)V\\\\V=\dfrac{m_1v_1+m_2v_2}{(m_1+m_2)}[/tex]

Put all the values,

[tex]V=\dfrac{3\times 2+2\times (-4)}{(3+2)}\\\\=-0.4\ m/s[/tex]

So, the velocity of the carts after the collision is equal to 0.4 m/s to the left.

Answer: 2

Explanation:

The average speed of the inchworm 1 at 2 minutes in the given graph is determined as 0.025 m/s.

The average speed of an object is the rate of change of displacement of the object with time.

The average speed of the inchworm 1 at 2 minutes is calculated as follows;

v = D/t

v = 3 m/(2 min x 60 s)

v = 0.025 m/s

Thus, the average speed of the inchworm 1 at 2 minutes is 0.025 m/s.

Learn more about average speed here: https://brainly.com/question/6504879

Answer:

its c

Explanation:

Answer:

a) 52.915 m

b) The vertical velocity is approximately 21.092 m/s

The resultant velocity is approximately 26.5 m/s

Explanation:

a) The height of the window in the house from which the water was thrown = 15 m

The speed of the stream of water thrown = 20 m/s

The angle at which the water was thrown = 37° over the horizontal

The acceleration due to gravity, g = 10 m/s²

a) The distance from the base of the house at which the water will fall is given as follows;

y = y₀ + u·t·sin(θ) + 1/2·g·t²

Where;

y = The vertical height reached    

u = The initial velocity

t = Time of flight

From the point the steam of water is thrown, we get;

y₀ = 15 m

Therefore;

y = 15 + 20 × t × sin(37°) - 1/2 × 10 × t²

y = 15 + 20 × t × sin(37°) - 5 × t²

When y = 0, Ground level, we get

0 = 15 + 20 × t × sin(37°) - 5 × t²

5·t² - 20×sin(37°)×t -15 = 0

∴ t = (20 ×sin(37°) ± √((-20 × ·sin(37°))² - 4 × (5) × (-15)))/(2 × 5)

t ≈ 3.3128302, or t ≈ 0.906

Therefore, the time of flight of the water, t ≈ 3.3128302 seconds

The distance from the base of the house at which the water will fall = The horizontal distance travelled by the water, x

x = u·cos(θ)×t

∴ x = 20 × cos(37°) × 3.3128302 ≈ 52.915

The distance from the base of the house at which the water will fall = x ≈ 52.915 m

b) The velocity at which the water will reach the ground, 'v', is given as follows;

The vertical velocity, [tex]v_y[/tex] = u·sin(θ)·t - g·t

At the ground, t ≈ 3.3128302 seconds

∴ [tex]v_y[/tex] = 20 × sin(37) - 10 × 3.3128302 ≈ -21.092

The vertical velocity at which the water will reach the ground, [tex]v_y[/tex] ≈ 21.092 m/s (downwards)

The resultant velocity, v = √([tex]v_y[/tex]² + vₓ²)

∴ v = √(21.092² + (0 × cos(37°))²) ≈ 26.5

The resultant velocity at which the water will reach the ground, v ≈ 26.5 m/s.

Answer:

[tex]n=4.5\times 10^{13}[/tex]

Explanation:

Initial charge, [tex]q_1=10\mu C[/tex]

After conduction, charge on the body becomes,  [tex]q_2=-2.8\mu C[/tex]

We need to find the number of electrons gained by this charged body.

Net charge,

[tex]q=q_1+q_2\\\\=10+(-2.8)\\\\=7.2\ \mu C[/tex]

Let n be the number of electrons gained by this charged body. So,

[tex]q=ne\\\\n=\dfrac{q}{e}\\\\n=\dfrac{7.2\times 10^{-6}}{1.6\times 10^{-19}}\\\\=4.5\times 10^{13}[/tex]

So, [tex]4.5\times 10^{13}[/tex] electrons gained by this charged body.

Answer:

The Answer is gonna be B. The normal force (magnitude and direction)

Answer:

solution given ;

mass[m]=55kg

acceleration due to gravity [g]=10m/s²

weight[W]=mg=55×10=550 Newton

Answer:

ΔL = 0.429 m

Explanation:

The expression for linear thermal expansion is

         ΔL = α L₀ ΔT

the coefficient of linear expansion of steel is 11 10⁻⁶ ºC⁻¹

the initial length of the bridge is L₀ = 1.30 10³ m and the temperature variation is ΔT = 30 ºC

calculate  

        ΔL = 11 10⁻⁶  1.30 10³  30

        ΔL = 4.29 10⁻¹ m

        ΔL = 0.429 m

Answer:

Ionic bonds are formed between cation and anions . A cation is formed when a metal ion loses valence electron while an anion is formed when a non-metal gains a valence electron.

Answer:

we need the graph to answer the question.

Answer:

Aceleración media = 0.5 m/s²

Explanation:

Dados los siguientes datos;

Velocidad inicial = 15 m/s

Velocidad final = 20 m/s

Tiempo, t = 10 segundos

Para encontrar la aceleración;

Aceleración se puede definir como la tasa de cambio de la velocidad de un objeto con respecto al tiempo.

Esto simplemente significa que la aceleración viene dada por la resta de la velocidad inicial de la velocidad final a lo largo del tiempo.

Por lo tanto, si restamos la velocidad inicial de la velocidad final y la dividimos por el tiempo, podemos calcular la aceleración de un objeto. Matemáticamente, la aceleración viene dada por la fórmula;

[tex] Aceleracion = \frac{final \; velocidad - inicial \; velocidad}{tiempo}[/tex]

Sustituyendo en la fórmula, tenemos;

[tex] Aceleracion = \frac{20 - 15}{10}[/tex]

[tex] Aceleracion = \frac{5}{10}[/tex]

Aceleracion = 0.5 m/s²

Por tanto, la aceleración media es igual a 0.5 metros por segundo al cuadrado.

Answer:

a) the number of particles increases

b) average distance between them should decrease

c) the number of particles decreases, the pressure must also decrease

Explanation:

a) When the girl pumps to increase the pressure inside the tire she introduces more particles. Therefore the number of particles increases

b) as the volume of the tire does not change and there are more particles, the average distance between them should decrease

c) When a hole is opened, some of the particles inside the tire come out, so as the number of particles decreases, the pressure must also decrease

Answer:

Construction pulleys are used in order to lift and place heavy materials. Curtains at a theatre are moved using pulley systems that pull the curtains apart. Blinds on windows operate using a pulley system to move the blinds up and down.

We use pulleys for things like and elevators, cranes, and bikes.

Answer:

[tex]\mu_k=0.5[/tex]

Explanation:

From the question we are told that:

Force [tex]F=75N[/tex]

Weight [tex]W=150N[/tex]

Generally the equation for coefficient of friction [tex]\mu_k[/tex] is mathematically given by

[tex]\mu_k=\frac{F}{mg}[/tex]

[tex]\mu_k=\frac{75}{150}[/tex]

[tex]\mu_k=0.5[/tex]

Answer:

Explanation:

The puppy starts and ground level and goes up a flight of stairs 10 m weighs 30N. The weight doesn't change so the only thing that can is the height.

Energy change = F * d

Energy change = 30 * 10

Energy change = 300 J

Answer:

Y

Explanation:

The fulcrum is the point where the scissor blades are joined together. The force or effort is the end or handle of the scissors. The parts of a pair of pliers are similar to the scissors.

Your answer would be C.

A step-up transformer is a transformer that raises voltage from main to secondary by having more secondary winding turns than primary winding turns.

Hope this helps; have a great day!

Answer:

sunspots

Sunspots are areas in the sun that has a magnetic field is about 2 thousand times stronger than Earth's. Also is much higher than anywhere else on the Sun.

it's C

because the faster an object moves the more kinetic energy it has.

Answer:

3.33 seconds

Explanation:

formula of impulse J=Ft

so 10(5) = 15x

x = 50/15 = 3.33

Answer:

Surface waves, in contrast to body waves can only move along the surface. They arrive after the main P and S waves and are confined to the outer layers of the Earth. They cause the most surface destruction. Earthquake surface waves are divided into two different categories: Love and Rayleigh.

Explanation:

Hope this helped Mark BRAINLIEST!!!

Answer:

Surface waves  are the seismic waves that cause the most damage.

Explanation:

Answer:

power will three times decrease (one-third)

Explanation:

P = W / t

thus when work is constant, power is inversely proportional to time

so, when time is tripled, power is decreased to one-third

Answer:

I think its dense and solid and located near a star.

Explanation:

Hope this helps, good luck.

Answer:

1,3,7,8

Explanation:

Edge 2021