need help with this!

just scienceeeeeee

Need Help With This! Just Scienceeeeeee
Need Help With This! Just Scienceeeeeee

Answers

Answer 1

Answer:

7)  λ = 0.5 m,  8)  f = 4.8 10¹⁴ Hz

Explanation:

The speed of an electromagnetic wave is

          c = λ f

where c is the speed of light in vacuum c = 3 10⁸ m / s

7) indicate the frequency f = 6.0 10⁸ Hz

we do not know the wavelength

         λ = c / f

       

we calculate

        λ = 3 10⁸ / 6.0 10⁸

        λ = 0.5 m

8) indicate the wavelength  λ = 6.25 10-7 m

we do not know the frequency

         f = c / λ

we calculate

        f = 3 10⁸ / 6.25 10⁻⁷

        f = 0.48 10¹⁵ Hz

        f = 4.8 10¹⁴ Hz


Related Questions

a que velocidad en km/h corrio usain bolt en el capeonato mundial de berlin en 2009 para batir el record mundial de los 100 m planos en 9.58

Answers

Answer:

v = 37.59 km/h

Explanation:

The question says, "how fast in km / h did usain bolt run at the berlin world championship in 2009 to break the world record for the 100m sprint in 9.58".

Distance, d = 100 m = 0.1 km

Time, t = 9.58 s = 0.00266 h

We need to find the speed of the Usain Bolt. We know that,

Speed = distance/time

So,

[tex]v=\dfrac{0.1}{0.00266}\\\\v=37.59\ km/h[/tex]

So, the required speed is equal to 37.59 km/h.

A gymnast with mass 50kg suspends herself from lower end of a hanging rope, upper end of the rope is attached to the ceiling. What is the weight of gymnast? Which of the Newton’s law related to your calculation? if gymnast fall with an acceleration of 2m/s2 , what is the force on the rope?

Answers

Answer:

I. Weight = 490 Newton

II. Newton's Second Law of Motion

III. Force = 100 Newton

Explanation:

Given the following data;

Mass = 50 kg

Acceleration = 2 m/s²

I. To find the weight of the gymnast;

Weight = mass * acceleration due to gravity

We know that acceleration due to gravity is equal to 9.8 m/s².

Weight = 50 * 9.8

Weight = 490 Newton

II. Newton's Second Law of Motion states that the acceleration of a physical object is directly proportional to the net force acting on the physical object and inversely proportional to its mass.

Mathematically, it is given by the formula;

Force = mass * acceleration

[tex] F = ma[/tex]

III. To find the force, we would use the following formula;

[tex] F = ma [/tex]

[tex] F = 50 * 2[/tex]

Force = 100 Newton

A skier of weight 700 N is pointed down a ski hill that has a slope angle of 25° above horizontal.
What is the component of his weight pulling him down the slope.
O 634N
O 326N
O 296N
O 700N

Answers

Answer:

O 296N

Explanation:

F_y = F*sin(x)

F_y = 700N*sin(25°)

F_y = 295.83N or 296N

which factor is least likely to limit the rate of photosynthesis?

- carbon dioxide concentration

- light intensity

- oxygen concentration

- temperature

Answers

Answer:

oxygen concentration

Explanation:

The process of recovering valuable or useful materials from waste or scrap is called
a.
recycling.
c.
rebuilding.
b.
renewing.
d.
reducing.


Please select the best answer from the choices provided

A
B
C
D

Answers

The answer is A) Recycling. Recycling has to do with finding something valuable amongst trash. For example, in a dumpster, someone may just find a nice painting. Mark as brainliest :)

Answer:

hi

Explanation:

A force of 30.0 N is applied to a 3.00 kg object for 3.00 seconds. Calculate the velocity experienced by the object.

Answers

Answer:

Explanation:

F = ma and

[tex]a=\frac{v}{t}[/tex]

We have F, we have m, but in order to solve for v, we need a.

30.0 = 3.00a so

a = 10.0 m/s/s. Plug that in for a in the second equation and solve for v:

[tex]10.0=\frac{v}{3.00}[/tex] so

v = 10.0(3.00) so

v = 30.0 m/s

50cm long copper wire carries 5A current directed towards negative z-axis placed in a region if magneti field of strength 15T applied into the page the magnetic force will be?

Answers

Answer:

Your answer is 37.5 N

Explanation:

Force, F = BIL

F = 15 x 5 x 0.5 = 37.5 N

Bones are composed of three main components, what are they? (Choose all that apply)

Answers

Answer:

funny bone and compact bone

Explanation:

your funny bone only reacts if you hit it against something the compact bone is the heaviest and strongest bone in your body and the bone marrow is soft sponge like tissue in the center if most bones that produces white and red blood cells

the use of thermostat in a gas cooker is to ​

Answers

Explanation:

An oven thermostat regulates the temperature inside an oven. The thermostat's temperature-sensitive probe measures the oven's warmth, switching the heat on and off as necessary to maintain the correct temperature.

Một dây dẫn mảnh được uốn thành một cung tròn bán kính 10cm, góc ở tâm bằng 1200, đặt trong không khí. Trong dây dẫn có dòng điện cường độ 30A chạy qua. Độ lớn của cảm ứng từ tại tâm của cung tròn là bao nhiêu ?

Answers

Answer:

Diana and that

Explanation:

muyayyano

i will mark brainliest if you get it right.

Answers

Answer:

Satellite D

Explanation:

It has more mass

what is energy?what its si unit​

Answers

Answer:

energy is the capacity or ability to do work

its si unit is joule

when two capacitors are connected in series, the effective capacitance is 2.4muF and when connected in parallel, the effective capacitance is 10muF. calculate the individual capacitances.​

Answers

Answer:

let one capacitor be x and other be y

[tex]in \: parallel \: connection : \\ \frac{x + y}{xy} = 10 \times {10}^{ - 6} - - - (a) \\ in \: series \: connection : \\ x + y = 2.4 \times {10}^{ - 6} - - - (b) \\ in \: (a) : \\ \frac{2.4 \times {10}^{ - 6} }{xy} = 10 \times {10}^{ - 6} \\ xy = 0.24 - - - (c) \\ from \: (b) : \\ y = (2.4 \times {10}^{ - 6} ) - x \\ \therefore \: in \: (c) : \\ x(2.4 \times {10}^{ - 6} - x) = 0.24 \\ 2.4 \times {10}^{ - 6} x - {x}^{2} = 0.24 \\ {x}^{2} - 2.4 \times {10}^{ - 6} x - 0.24 = 0 \\ x = 0.5 \\ 0.5y = 0.24 \\ y = 0.48 \\ { \boxed{ C _{1} = 0.5 \: farads}} \\ { \boxed{C _{2} = 0.48 \: farads}}[/tex]

need help please... thank u​

Answers

Answer:

the answer from my side is both vertical and horizontal

Answer:

Entirely horizontal

Explanation:

The ball begins the movement with horizontal and vertical velocity, but it is subject to the gravity acceleration, that will break the movement. When it achieves the top of the path, is when the vertical velocity go to 0 and begin to grow in the opposite direction, so in the very top of the path, the velocity is entirely horizontal

1. What is the voltage if a resistance of 25 produces a current of 250
amperes?

Answers

         The relationship between electric current and potential difference is stated by Ohm's law. Most conductors' current is directly inversely proportional to the voltage applied to them. German physicist Georg Simon Ohm was the first to empirically confirm Ohm's law.

What is the unit of Ohm's law?

The expression for Ohm's law is V I. As a result, V = RI, where R is the resistance constant. R is influenced by the conductor's material, size, and other factors. Ohm () is its SI unit.

      Ohms to volts conversion using the formula watts volts = watts ohms. or.

V = √W × Ω Example.

Given that,

  Voltage (v) = 250 V          

  Resistance (R) = 25 Ω,

   Determine current (I) =?

 We know that from ohm's law

 V = I R    

  I = V/R

  I = 250 / 25

  I = 10 A

Current in the circuit is 10 Amps.

To Learn more About Ohm's law, Refer:

https://brainly.com/question/14296509

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what are scalar quantities and list their examples​

Answers

Explanation:

these are quantities that have magnitude but no direction

Examples include : speed, mass, volume, density, everything, time

speed, mass, volume, density, time

1. A boat is floating on the water.
One of the forces acting on the boat is the weight. This is the force of the Earth on the boat.
a
State the other force in this interaction pair.
(1 mark)

Answers

Answer:

Gravity

Explanation:

Because without gravity thee would be no boat floating on water

You plan to use a slingshot to launch a ball that has a mass of 0.019 kg. You want the ball to accelerate straight toward your target at 23 m/s2. How much force do you need to apply to the ball?

Answers

Answer:

Explanation:

this is a simple application of Newton's 2nd Law: F = ma.

F = .019(23) so

F = .44 N

You would need to apply a force of 0.437 Newtons to the ball in order to achieve the desired acceleration of 23 m/s².

Force is a physical quantity that describes the interaction between objects or systems and their ability to change motion or shape. It is a vector quantity, meaning it has both magnitude and direction. Force can cause an object to accelerate, decelerate, or change direction.

According to Newton's second law of motion, force is directly proportional to the mass of an object and the acceleration it experiences. The equation F = m × a represents this relationship, where F is the force, m is the mass of the object, and a is the acceleration.

Force can be measured in various units, such as Newtons (N) in the International System of Units (SI) or pounds (lb) in the US customary system. Common examples of forces include gravity, friction, tension, compression, and applied forces like pushing or pulling an object.

According to Newton's second law of motion, which states that force (F) is equal to mass (m) multiplied by acceleration (a):

F = m × a

In this case, the mass of the ball is given as 0.019 kg, and the desired acceleration is 23 m/s². Plugging these values into the equation, we can calculate the force:

F = 0.019 kg × 23 m/s²

F = 0.437 kg m/s²

Learn more about Force, here:

https://brainly.com/question/30507236

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A weather reporter describes a large area of air that has the same temperature and air pressure . What is the reporter describing ?

Answers

Answer:

air mass

Explanation:

Remember, the weather of a particular location is often a description of the atmospheric condition of that particular place.

Indeed, the definition of an air mass fits the reporter's description above. As the name implies, a particular air mass would represent the temperature characteristics of a particular area that has a constant or the same temperature and air pressure.

Which law is stated below?
All forces exist in action-reaction pairs.
A. Newton's third law
B. Newton's first law
C. Newton's second law
D. The law of inertia

Answers

That would be a, newton’s third law

Answer:

Maybe the answer is Newton's third law

А______
is a unit of measurement for energy. (7 Letters)

Answers

Answer:

Joule or kilowatt/hour

If a 5.0Ω resistor, a 9.0Ω resistor, and a 13.0Ω resistor are connected in series with a 24.0 V battery, calculate the total resistance.
0.037Ω
0.89Ω
585Ω
27.0Ω

Answers

Answer: 27Ω

Explanation:

Quando o circuito está em série, a resistência total é igual ao somatório das resistências parciais do circuito.

The temperature of an ideal gas in a sealed 0.40m3 rigid container is reduced from 350 K to 270 K.The final pressure of the gas is 60 kPa. The molar heat capacity at constant volume of the gas is 28.0 J/(mol K). The heat absorbed by the gas is closest to

Answers

Answer:

The answer is below

Explanation:

Given that the volume (V) = 0.4 m³, temperature difference (ΔT) = 270 K - 350 K = -80 K, pressure (P) = 60 kPa = 60000 Pa, R = 8.314 J/molK

Since we have constant volume, we can use the final state parameters to calculate the number of moles using the ideal gas law:

[tex]PV=nRT\\\\n=\frac{PV}{RT} =\frac{60000*0.4}{8.314*270} =10.69\ moles[/tex]

Given that the molar heat capacity at constant volume ([tex]C_v[/tex]) = 28.0 J/(mol K), the heat absorbed (Q) is:

[tex]Q=nC_v\Delta T=10.69*28*(-80) = -23945.6\ J\\\\Q=-23.95\ kJ[/tex]

Q ≈ -24 kJ

Which variable is represented by the following symbol? ∑F
a. Normal Force
b. Applied Force
c. Weight
d. Net Force

Answers

The variable represented by that symbol is: d. Net force.

Felipe drives his car at a velocity of 28 m/s. He applies the brake, which slows the vehicle down at a rate of 6.4 m/s2 and causes it to slow to a stop. How long does it take for the car to stop? Round your answer to the nearest tenth.

Answers

Answer:

4.4 seconds

Explanation:

use the equation

v(final)=v(initial)+a(t)

what we know:

v(initial)=28mps

v(final)=0 because it comes to a stop

a= -6.4    it is negative because the 6.4 is resisting forward motion

using these you get

0= 28 + (-6.4)t

6.4(t)=28

t=4.375 sec

and with rounding

t=4.4 sec

Answer:

4.4

Explanation:

i got it correct

What is the force between two charged objects called ?

Answers

Answer:

Coulomb force

Explanation:

The electric force between charged bodies at rest is conventionally called electrostatic force or Coulomb force. The force is along the straight line joining the two charges.

Felipe drives his car at a velocity of 28 m/s. He applies the brake, which slows the vehicle down at a rate of 6.4 m/s2 and causes it to slow to a stop. How long does it take for the car to stop? Round your answer to the nearest tenth.

Answers

Answer:

Explanation:

Use the one-dimensional equation

[tex]v_f=v_0+at[/tex] where v is the final velocity, v0 is the initial velocity, a is the acceleration, and t is the time it takes to reach that final velocity. We are solving for t. Filling in the other values:

0 = 28 + (-6.4)t and

-28 = -6.4t so

t = 4.4 seconds

Answer:

4.4

Explanation:

A hot cube of iron was heated up using 1500 J of thermal energy and was placed in a beaker of water. Before it was heated, the iron cube was 20.0 ˚C. The cube of iron raised the temperature of the water to 45.0 ˚C. If the iron cube has a mass of 133 g, what is the specific heat capacity of iron?

Answers

Answer:

451.13 J/kg.°C

Explanation:

Applying,

Q = cm(t₂-t₁)............... Equation 1

Where Q = Heat, c = specific heat capacity of iron, m = mass of iron, t₂= Final temperature, t₁ = initial temperature.

Make c the subject of the equation

c = Q/m(t₂-t₁).............. Equation 2

From the question,

Given: Q = 1500 J, m = 133 g = 0.113 kg, t₁ = 20 °C, t₂ = 45 °C

Substitute these values into equation 2

c = 1500/[0.133(45-20)]

c = 1500/(0.133×25)

c = 1500/3.325

c = 451.13 J/kg.°C

A person weighs 60 kg. The area under the foot of the person is 150 cm2. Find the pressure exerted on the ground by the person. (Take g 10m/s2)

Answers

Answer:

40000 N/m²

Explanation:

Applying,

P =  F/A................... Equation 1

Where P = Pressure, F = Force, A = Area.

From the question,

The force(F) exerted by the person's foot is thesame as it's weight.

F = W = mg............ Equation 2

Where m = mass of the person, g = acceleration due to gravity.

Substitute equation 2 into equation 1

P = mg/A................ Equation 3

Given: m = 60 kg, g = 10 m/s², A = 150 cm² = (150/10000) m² = 0.015 m²

Substitute these values into equation 3

P = (60×10)/0.015

P = 600/0.015

P = 40000 N/m²

If the distance between the source of sound and observer is reduced to one half, then
the intensity of sound will become

Answers

Answer:

Let the power delivered by the sound wave be 'P'

Intensity by definition is the power delivered per unit area.

i.e. I =

dA

dP

;

In spherical polar coordinate system dA = r

2

Ω

I =

r

2

Ω

dP

;

I ∝

r

2

1

So if distance increases 3 fold. The Intensity becomes

9

1

times the initial

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