Is this correct?
I am not sure?

Answer:

f₁ = 1 Hz

f₂ = 0.75 Hz

Explanation:

The given time lapse between the two frequencies, t = 2 s

The frequency of a wave is the number of complete one cycles of the wave that pass through a given point in a given unit of time

The unit of frequency, 'f', is the Hertz, Hz

Therefore, frequency = Number of cycles/(Time)

The frequency of a wave, f = n/t

Where;

n = The number of completed cycles in a given time

The frequency of the first wave 1, f₁

The number of complete cycles by wave 1 in the 2 seconds, n = 2 cycles

The time, t = 2 seconds

The frequency of wave 1, f₁ = 2 cycles/(2 seconds) = 1 cycle/second = 1 Hz

The frequency of the second wave, wave 2, f₂

The number of complete cycles by wave 2 in the 2 seconds, n = 1 and half cycles = 1.5 cycles

The time, t = 2 seconds

The frequency of wave 2, f₂ = 1.5 cycles/(2 seconds) = 0.75 cycle/second = 0.75 Hz

Answer:

Answer:It is due to tyndall effect that the path of a light ray passing through a suspension is visible. The particles in suspension scatter the beam of light making it clearly visible.

Answer:

it is due to the Tyndall effect so the path of light is visible in a suspension but in solution the path of light is not visible

We each have a unique voice because so many factors work together to produce that voice. As air passes over them, the vocal cords vibrate very quickly to produce sounds. The higher the rate of vibration, called frequency, the higher the pitch will be.

Answer:

The force is 35808 N.

Explanation:

Power, P = 600 hp = 600 x 746 W = 447600 W

speed, v = 45 km/h = 12.5 m/s

Let the force is F.

P = F v

447600 = F x 12.5

F = 35808 N

Answer:

Watts

Explanation:

The SI unit for power is the watt (W), where 1 watt equals 1 joule/second (1 W=1 J/s).

Answer:

1.47 J/kg

120 m

Explanation:

The maximum height it can jump in a single leap 15 cm, = 0.15 m

to get the kinetic energy per kg of mass, we need to find the takeoff speed. The take off speed can be calculated by using the formula

v = [tex]\sqrt{2gh}[/tex]

where h = 0.15

v = [tex]\sqrt{2 * 9.81 * 0.15}[/tex]

v = [tex]\sqrt{2.94}[/tex]

v = 1.715 m/s

energy per kg of mass =

1/2 * (1.715) = 1.47 J/Kg

TJe height a human can jump when compared to the flea is

2 m/2.5 mm * 15 cm =

2/0.0025 *0.15 =

800 * 0.15 = 120 m

Answer:

the force of attraction between all masses in the universe

Explanation:

Have a nice day :)

Answer:

The idea behind space expansion is that after the big bang, the universe started infinitely expanding. It's also called metric expansion. Stephen Hawking's A Brief History of Time goes further into detail on this.

Answer:

the forces are proportional to their areas of application

Explanation:

In a hydraulic jack, Pascal's principle is used, that the pressure in an incompressible liquid is the same at the same height, whereby the pressure on both sides of the jack are the same

           P₁ = P₂

the pressure is defined by

            P = F / A

we substitute

           [tex]\frac{F_1}{A_1} = \frac{F_2}{A_2}[/tex]

           F₂ = [tex]\frac{A_2}{A_1} \ F_1[/tex]

therefore the force is F₂> F₁

Therefore the forces are proportional to their areas of application

Answer:

Time, t = 50.8 seconds.

Explanation:

Given the following data;

Mass = 6000 kg

Force = 2950 N

Initial velocity = 4 m/s

Final velocity = 29 m/s

To find time;

First of all, we would determine the acceleration of the truck using the following formula;

Force = mass * acceleration

2950 = 6000 * acceleration

Acceleration = 2950/6000

Acceleration = 0.492 m/s²

Next, we find time using the first equation of motion;

[tex] V = U + at[/tex]

Where;

V is the final velocity.

U is the initial velocity.

a is the acceleration.

t is the time measured in seconds.

Making time, t the subject of formula, we have;

[tex] t = \frac{V - U}{a}[/tex]

Substituting into the equation, we have;

[tex] t = \frac{29 - 4}{0.492}[/tex]

[tex] t = \frac{25}{0.492}[/tex]

Time, t = 50.8 seconds.

Answer:

Se requiere corriente para que brille la luz.

Explicación:

Una batería de 1,5 voltios está conectada a una luz LED roja, el LED se enciende siempre que esté conectado a la batería. A partir de esta situación se afirma que se requiere corriente para que brille la luz. La batería tiene corriente eléctrica almacenada que permite que la luz brille hasta que la corriente eléctrica esté presente en la batería. Esta batería se puede cargar durante un período de tiempo cuando está llena, se puede recuperar durante muchas horas.

Answer:

A force is a push or pull upon an object resulting from the object's interaction with another object. Whenever there is an interaction between two objects, there is a force upon each of the objects. ... Forces only exist as a result of an interaction.

Explanation:

Energy stored in an object due to its position is Potential Energy. Energy that a moving object has due to its motion is Kinetic Energy.

Answer:

the distance traveled by the sports car is 90 m

Explanation:

Given;

mass of the sports car, m = 500 kg

initial velocity of the sports car, u = 0

final velocity of the sport car, v = 30 m/s

time of motion of the car, t = 6 s

The distance traveled by the sports car is calculated as;

[tex]s = (\frac{u+v}{2} )t\\\\s = (\frac{0+30}{2} ) \times 6\\\\s = 15 \times 6\\\\s = 90 \ m[/tex]

Therefore, the distance traveled by the sports car is 90 m

Answer: Microscope is an instrument that is used for observing micro particles, cells, and nanosized particles.

Explanation:

Placing one hand below the stage of the microscope and other hand must be used to hold the arm of the microscope. This facilitates the safety of the microscope as it will provide support to the entire structure of the microscope and also to the lens and mirrors attached to the structure of the microscope. If any of the part get damaged or lost during carrying it will affect the overall functioning of the microscope.

Answer:

wrapping the electrical cord around the arm of the microscope

Explanation:

just took the test

Explanation:

A lightning rod (US, AUS) If lightning hits the structure:-

It will preferentially strike the rod and be conducted to ground through a wire.

Instead of passing through the structure, where it could start a fire or cause electrocution.

The parts of a lightning protection system are air terminals (lightning rods or strike) and all of the connectors and supports to complete the system.

Answer:

V = 50 volts

Explanation:

Given that,

Resistance, R = 10 ohms

Current, I = 5 A

We need to find the potential difference across the circuit. We know that,

V = IR

Put all the values,

V = 5 × 10

V = 50 volts

Hence, the potential difference is equal to 50 volts.

the answer is Jupiter

please mark the brainliest

Answer:

The metric system is a called a decimal-based system because it is based on multiples of ten. Any measurement given in one metric unit (e.g., kilogram) can be converted to another metric unit (e.g., gram) simply by moving the decimal place.

Explanation:

Hope it helps

Answer:

The answer is D. 5390

Explanation:

A kilogram to newton unit is 1 kg to 9.80665 newtons

If you do 550 times 9.80665 you get roughly 5393.6575 which is the closest to 5390

Answer:

The mnemonic I can use to memorize the metric prefixes in this order is: Gigantic Monsters Killed One Million Men Napping Peacefully. All right, so again, gigantic monsters killed one million men napping peacefully.

Answer:

El peso de la persona B es la mitad del peso de la persona A.

Explanation:

El peso de la persona B puede calcularse con la siguiente ecuación:

[tex] P_{B} = m_{B}g [/tex]   (1)

En donde:

[tex]m_{B}[/tex]: es la masa de la persona B

g: es la gravedad

Dado que la persona B tiene la mitad de la masa de la persona A, tenemos:

[tex] m_{B} = \frac{m_{A}}{2} [/tex]  (2)

En donde:

[tex]m_{A}[/tex]: es la masa de la persona A

Al introducir la ecuación (2) en (1) nos queda:

[tex] P_{B} = \frac{m_{A}}{2}g [/tex]   (3)

Sabemos que el peso de la persona A está dado por:

[tex] P_{A} = m_{A}g [/tex]   (4)

Entonces, al introducir la ecuación (4) en (3) tenemos:

[tex] P_{B} = \frac{P_{A}}{2} [/tex]

Por lo tanto, el peso de la persona B es la mitad del peso de la persona A.

Espero que te sea de utilidad!

AnswER PIZZA?

Explanation:

Answer:

Her acceleration is 0 m/s²

Explanation:

We note that the motion of the girl is on a straight road, therefore;

The vertical acceleration (e.g. due to gravity, g) on the horizontal motion = 0

The horizontal acceleration, a = (Change in velocity, Δv)/(Change in time, Δt)

For uniform velocity, the change in velocity, Δv = 0

Therefore, fore any change in time, Δt, we have;

a = Δv/Δt

Her acceleration, a = 0/Δt = 0

Her acceleration, a = 0 m/s²

velocity after 2 seconds?

I assume the units are wrong: a = 2 m/s/s, not 2 m/s.

That means the each second, speed increases by 2 m/s. So, after 1 second, it’s going 2 m/s and after 2 seconds, it’s going 4 m/s. As long as the acceleration continued, each seconds would result in a gain of 2 m/s. You could just plug this into:

Vf = Vi + at.

Thus, Vi = 0 and Vf = 4 m/s.

The average speed during these 2 seconds is the average of initial and final speeds:

Vavg = (0 + 4)/2 = 2 m/s

The means that during these 2 seconds, on AVERAGE the bus was going 2 m each second. During the first second, it was going slower than 2 m/s and during the last second it was going faster than 2 m/s, but on AVERAGE, it was going 2 m each second. This is 2m + 2m = 4 m.

You could just plug the numbers into an equation:

X = Vi x t + 1/2 at^2 = 0 + 1/2 x 2 x 2^2 = 0 + 4 = 4 m

So, in conclusion:

the units needed to be corrected

Vf = 2 m/s (this is speed, which is the AMOUNT of velocity, since velocity requires a direction)

Distance = 4 m

2.5K views

Answer:

W = 170.62 N

Explanation:

The given question is, "calculate the weight of a person traveling to the moon whose mass is 105 kg".

We need to find the weight of a person on the Moon.

The weight of an object is given by :

W = mg

Where

g is acceleration due to gravity on Moon, g = 1.625 m/s2

W = 105 kg × 1.625 m/s²

W = 170.62 N

Hence, the weight of the person is 170.62 N.

Answer:

15 m

Explanation:

We'll begin by calculating the speed of the wave. This can be obtained as follow:

Time = 5 s

Distance = 15 m

Speed =?

Speed = distance / time

Speed = 15 / 5

Speed = 3 m/s

Finally, we shall determine the distance between the crests of the wave. This can be obtained as follow:

Speed (v) = 3 m/s

Frequency (f) = 0.2 Hz

Distance between the crest (λ) =?

v = λf

3 = λ × 0.2

Divide both side by 0.2

λ = 3 / 0.2

λ = 15 m

Therefore, the distance between the crests of the wave is 15 m

Answer:

Distance = 36 meters

Explanation:

Given the following data;

Work done = 2,340,000 Joules

Force = 65,000 Newton

To find the distance covered by the crane;

Mathematically, work done is given by the formula;

[tex] Workdone = force * distance[/tex]

Substituting into the formula, we have;

[tex] 2340000 = 65000 * distance [/tex]

[tex] Distance = \frac{2340000}{65000}[/tex]

Distance = 36 meters

Answer:

The magnitude and the direction of the vector.

Explanation:

The length of the vector is its magnitude and arrow head shows the direction of the vector.