Light waves require a medium to travel. *
True
False

Answer:

Systemic racism

Explanation:

Answer: [tex]83.65\times 10^{-27}\ kg.m/s[/tex]

Explanation:

Given

The velocities of the protons are 400 m/s and 450 m/s

Mass of the Proton is [tex]m=1.673\times 10^{-27}\ kg[/tex]

Since they travel in the opposite direction, therefore, their momentum cancels out each other.

Momentum is the product of mass and velocity

[tex]\therefore m(450-400)\\\Rightarrow 1.673\times 10^{-27}\times 50\\\Rightarrow 83.65\times 10^{-27}\ kg.m/s[/tex]

The direction of momentum is in the direction of proton having 450 m/s velocity.

Answer:

Resistance = 400000 Ohms

Explanation:

Given the following data;

Voltage = 1200 V

Current = 3 mA = 3/1000 = 0.003 A

To find the resistance;

Voltage = current * resistance

Resistance = 1200/0.003

Resistance = 400000 Ohms

Answer:

Final velocity of ball = 20 m/s

Explanation:

Given:

Height when ball released = 20meter

Find;

Time taken to fall

Final velocity of ball

Computation:

Initial velocity of ball = 0 m/s

Acceleration due to gravity = 10 m/s²

Using equation of motion;

S = ut + (1/2)(g)(t²)

20 = (0)(t) + (1/2)(10)(t²)

20 = 5(t²)

(t²) = 20 / 5

(t²) = 4

Time taken to fall = 2 second

V = u + at

V = 0 + (10)(2)

Final velocity of ball = 20 m/s

On 11 November a fire started in the Ravensbourne area near Toowoomba, which burnt through over 20,000 hectares (49,000 acres) of bush across several days, destroying six houses.

Answer: 3.3 x 10^-28 J

Explanation: just answered on a quiz!! :)

Answer:

1. Static Friction

2. Sliding friction

3. Fluid friction

4. is rolling friction

Sorry if i am wrong

Explanation:

Answer:

A composite wave

Answer:

surface waves

Explanation:

Answer:

A. increases

Explanation:

with more mouths to feed, you need more food, but when your food doesn't increase with your population, then there is a food shortage.

Answer:

* if the two plates have the same charge sign       F_net = 0

*if one plate is positive and the other is negative   F_net = 59.4 N

Explanation:

The electric field created by a parallel plate is

           E = [tex]\frac { \sigma }{2 \epsilon_o }[/tex]

where sigma is the charge density

          σ = Q / A

we substitute

           E = [tex]\frac{Q}{A \ 2 \epsilon_o }[/tex]

           E = [tex]\frac{ 5.83 \ 10^{-8} }{7.34 \ 10^{-4}\ 2 \ 8.5 \ 10^{-12} }[/tex]

           E = 4.487 10⁶ N / C

the electric force is

          F = E / q

in this force it is a vector, so if the charges are of the same sign they repel and if they are of the opposite sign they attract. In this case, the test load is between the two plates that have the same load sign, so the forces are in the opposite direction.

* if the two plates have the same charge sign

          F_net = F₁ - F₂

          F_net = q (E₁ -E₂)

since the electric field does not depend on the distance

           E₁ = E₂

in consecuense  

           F_net = 0

In a more interesting case

*if one plate is positive and the other is negative

           F_net = F₁ + F₂

           F_net = q (E₁ + E₂) = 2 q E₁

           F_net = 2 6.62 10⁻⁶  4.487 10⁶

           F_net = 59.4 N

net force goes from positive to negative plate

Answer:

59.4 N

Explanation:

acellus

Explanation:

friction always acts in the opposite direction as motion.

Answer:

12 metre

Explanation:

Wavelength = Velocity / Frequency

Wavelength = 300m/s / 25 Hz

Wavelength = 12 metre

Answer:

So let's first start with the base which is a rectangle remember that the formula to solve the area

Explanation:

Answer:

about 8 kpc

Explanation:

Answer:

This rapid growth increase was mainly caused by a decreasing death rate (more rapidly than birth rate), and particularly an increase in average human age. By 2000 the population counted 6 billion heads, however, population growth (doubling time) started to decline after 1965 because of decreasing birth rates.

Explanation:

The main cause of human population growth is increased well-being.

Well-being is a term to refer to the state of satisfaction of economic, social, labor, psychological, biological needs, among others of the human.

Therefore, when civilizations and societies became more complex, many issues such as health, food, hygiene, education, government, among others, improved, giving more well-being to their inhabitants.

Well-being has evolved with society and today people have access to many things, services, and goods that give them well-being, improving their quality and life expectancy. Therefore, the correct answer is well-being.

Learn more at: https://brainly.com/question/10571076

Answer:

PE = 44.1 J

Explanation:

Ok, to have the specific data, the first thing we must do is convert from grams to kilograms. Since mass must always be in kilograms (kg)

We have:

We convert it using a rule of 3, replacing, simplifying units and solving:

==================================================================

Earth's gravity is known to be 9.8 m/s², so we have:

Data:

Use formula of potencial energy:

Replace and solve:

Since the decimal number, that is, the number after the comma is less than 5, it cannot be rounded, then we have this result.

The potential energy of the volleyball is 44.1 Joules.

Greetings.

Answer:

2.00 (right on acellus)

Explanation:

doubling the distance between two charges makes F (8.00) quarter, so you would just do 8.00*1/4

Answer:

 W = 9.93 10² N

Explanation:

To solve this exercise we must use the concept of density

           ρ = m / V

the tabulated density of copper is rho = 8966 kg / m³

let's find the volume of the cylindrical tube

           V = A L

           V = π (R_ext  ² - R_int ²) L

let's calculate

          V = π (4² - 2²) 10⁻⁴  3

          V = 1.13 10⁻²  m³

         m = ρ V

        m = 8966 1.13 10⁻²

        m = 1.01 10² kg

the weight of the tube

        W = mg

         W = 1.01 10² 9.8

         W = 9.93 10² N

Answer:

the index of refraction of the coating is 1.33  

Explanation:

Given the data in the question;

refraction index of  interior portion of the rod η[tex]_{interior[/tex] = 1.55

angle of incidence θ[tex]_i[/tex] = 59.5°

From Snell's law, we know that;

η[tex]_{interior[/tex] × sinθ[tex]_i[/tex]  = η[tex]_{coating[/tex] × sinθ[tex]_r[/tex]

where η[tex]_{interior[/tex]  is the index of refraction of the rod ( material 1 )

θ[tex]_i[/tex]  is the angle of incidence

η[tex]_{coating[/tex] is the index of refraction in outer coating ( material 2 )

θ[tex]_r[/tex] is the angle of refraction

so we substitute our values into the equation;

η[tex]_{interior[/tex] × sinθ[tex]_i[/tex]  = η[tex]_{coating[/tex] × sinθ[tex]_r[/tex]

1.55 × sin( 59.5° )  = η[tex]_{coating[/tex] × sin( 90° )

1.55 × 0.861629  = η[tex]_{coating[/tex] × 1

1.3355 = η[tex]_{coating[/tex] × 1

η[tex]_{coating[/tex] = 1.33   { 2 decimal places }

Therefore, the index of refraction of the coating is 1.33  

Answer:

Explanation:

Potential energy is the energy stored within an object, due to the object's position, arrangement or state

Answer:

240joules

Explanation:

P:E = MGH

mass 12kg

g is constant as 10m/s²

h is 2m

therefore, 12*10*2 =240joules

Answer:

c i hope this helps

Explanation:

Answer: 12.6 newtons

Explanation:

Take the equation, static force equals static friction times normal force.             ( F = μn )

Divide both sides by static friction so normal force is the answer.

( F / μ = n )

Insert your numbers (4.11 F and 0.325 μ) into the equation to get your answer.

( 4.11 / 0.325 = n )

n = 12.6

My first time helping someone and future people on this site. This is the answer I put in and got right.

ACELLUS GANG STAND UP!

Answer:

Explanation:

The x-component is found in the magnitude of the vector times the cosine of the angle.

[tex]A_x=14.4cos133[/tex] and, to 3 sig dig,

[tex]A_x=-9.82m[/tex]