Help pls can you answer this question legit pls ;(

Answer:

"In water, the speed of light is v01.33=2.26 x 108 m/s."

Explanation:

Answer:

Apparent weight of pilot due to centripetal acceleration:

m v^2 / R = 5 g m = 5 * 70 * 9.8 = 3430 N

Weight of pilot = 70 * 9.8 = 686 N

Total = 3430 + 686 = 4116 N

Answer: 0.00693

Explanation:

Given

Spring constant [tex]k=2\ N/m[/tex]

Mass of object [tex]m=75\ g[/tex]

The amplitude of the oscillation decreases from 10 mm to 5 mm  in 15 s

Equation of amplitude for the ideal spring-mass system is

[tex]\Rightarrow A=A_oe^{-\frac{bt}{2m}}\quad \quad [\text{b=damping constant}]\\\text{Insert the values}\\\\\Rightarrow 5=10e^{\frac{b\times 15}{2\times 0.075}}\\\\\Rightarrow e^{-\frac{b\times 15}{2\times 0.075}}=0.5\\\\\text{Taking natural log both sides}\\\\\Rightarrow \ln \left(e^{-\frac{b\times 15}{2\times 0.075}}\right)=\ln 0.5\\\\\Rightarrow -\dfrac{15b}{0.15}=-0.693\\\\\Rightarrow b=0.00693[/tex]

Answer:

Static friction acts on stationary objects while kinetic friction acts on those in motion. Static friction is always greater or equal to kinetic friction. This can explain why objects often take more force to get in motion than it takes to continue their motion.

Answer:

the magnitude of the velocity of one particle relative to the other is 0.9988c

Explanation:

Given the data in the question;

Velocities of the two particles = 0.9520c

Using Lorentz transformation

Let relative velocity be W, so

v[tex]_r[/tex] = ( u + v ) / ( 1 + ( uv / c²) )

since each particle travels with the same speed,

u = v

so

v[tex]_r[/tex] = ( u + u ) / ( 1 + ( u×u / c²) )  

v[tex]_r[/tex] = 2(0.9520c) / ( 1 + ( 0.9520c )² / c²) )  

we substitute

v[tex]_r[/tex] = 1.904c / ( 1 + ( (0.906304 × c² ) / c²) )  

v[tex]_r[/tex] = 1.904c / ( 1 + 0.906304 )

v[tex]_r[/tex] = 1.904c / 1.906304

v[tex]_r[/tex] = 0.9988c

Therefore, the magnitude of the velocity of one particle relative to the other is 0.9988c

Answer:

b

Explanation:

The materials are most likely used to change the surface area of the ramp. For example, the sand paper can change the ramp's texture. The wax paper can also change the surface area of the ramp by texture, it can be made smoother.

Answer:

B.

Explanation:

Hope it helped!

Answer:

Solution

Explanation:

Solution is a process in chemical weathering and it is the process of dissolving or removing rock in a solution through the activities of acid rain or solution. Chemical weathering refer to the process where rocks interact with chemical solutions or acid rain which can result in His integration.

Answer: 2.56

Explanation: I used a calculator

THE ANSWER IS +2.96.

It took me forever to figure out, but it's correct on Acellus.

Answer:

To protect us.

Explanation:

For ex. your dunking on a basketball hoop if that wasn't strong you would fall on your back and get injured.

Answer:

  α = 0.357 ras / s²

Explanation:

This is a rotational kinematics exercise, it tells us that it performs 10 squats in 30 s, for which it performs one squat at t = 3 s, also indicates that the angle of the squat is θ = 92º

            θ = θ₀ + w₀ t + ½ α t²

the athlete starts from rest, whereby w₀ = 0 and the initial angle in the vertical position is zero (θ₀=0)

            θ = ½ α t²

            α = 2 θ /t²

let's reduce the magnitudes to the SI system

            θ = 92º (π rad /180º) = 0.511π rad

let's calculate

            α = 2 0.5111π /3²

            α = 0.1136π rad / s²

            α = 0.357 ras / s²

Answer:

the required minimum length of the attenuator is 3.71 cm

Explanation:

Given the data in the question;

we know that;

[tex]f_{c_1[/tex] = c / 2a

where f is frequency, c is the speed of light in air and a is the plate separation distance.

we know that speed of light c = 3 × 10⁸ m/s = 3 × 10¹⁰ cm/s

plate separation distance a = 7.11 mm = 0.0711 cm

so we substitute

[tex]f_{c_1[/tex] = 3 × 10¹⁰ / 2( 0.0711  )

[tex]f_{c_1[/tex] = 3 × 10¹⁰ cm/s / 0.1422  cm

[tex]f_{c_1[/tex] =  21.1 GHz which is larger than 15 GHz { TEM mode is only propagated along the wavelength }

Now, we determine the minimum wavelength required

Each non propagating mode is attenuated by at least 100 dB at 15 GHz

so

Attenuation constant TE₁ and TM₁ expression is;

∝₁ = 2πf/c × √( ([tex]f_{c_1[/tex] / f)² - 1 )

so we substitute

∝₁ = ((2π × 15)/3 × 10⁸ m/s) × √( (21.1 / 15)² - 1 )

∝₁ = 3.1079 × 10⁻⁷

∝₁ = 310.79 np/m

Now, To find the minimum wavelength, lets consider the design constraint;

20log₁₀[tex]e^{-\alpha _1l_{min[/tex] = -100dB

we substitute

20log₁₀[tex]e^{-(310.7np/m)l_{min[/tex] = -100dB

[tex]l_{min[/tex] = 3.71 cm

Therefore, the required minimum length of the attenuator is 3.71 cm

Answer:

The air in the soil is similar in composition to that in the atmosphere with the exception of oxygen, carbon dioxide, and water vapor. In soil air as in the atmosphere, nitrogen gas (dinitrogen) comprises about 78%. In the atmosphere, oxygen comprises about 21% and carbon dioxide comprises about 0.036%.

hope this helps

have a good day :)

Explanation:

Answer:

Electric generator, also called dynamo, any machine that converts mechanical energy to electricity for transmission and distribution over power lines to domestic, commercial, and industrial customers. Generators also produce the electrical power required for automobiles, aircraft, ships, and trains.

Answer:

Electric motors are used in a broad range of industrial, commercial, and residential, applications, such as fans, pumps, compressors, elevators, and refrigerators. ... DC motors are used for variable speed control applications such as industrial machinery and motor vehicles.

In electricity generation, a generator is a device that converts mechanical energy to electrical energy for use in an external circuit. Generators provide nearly all of the power for electric power grids.

Hope it helps

Answer:

Transverse.

Explanation:

Electromagnetic waves is a propagating medium used in all communications device to transmit data (messages) from the device of the sender to the device of the receiver.

An electromagnetic spectrum refers to a range of frequency and wavelength that an electromagnetic wave is distributed or extends. The electromagnetic spectrum comprises of gamma rays, visible light, ultraviolet radiation, x-rays, radio waves, and infrared radiation.

A transverse wave can be defined as a type of wave in which particles of the medium of propagation oscillates or vibrates in a direction that is perpendicular to the direction that the wave moves i.e at right angle to the direction of propagation of the wave.

Basically, sound is a transverse and all transverse wave are the direct opposite of a longitudinal wave that usually travel in the same direction of its oscillation.

Hence, this wave is transverse.

Answer:

Density is the ratio between the mass and the volume of a body. Relative density, on the other hand, is the ratio between the density of an object (substance) and the density of some other reference object (substance) at some given temperature.

Explanation:

Answer:

Explanation:

From the options given,

The atmospheric features of Neptune are easier to see than those of Uranus because Neptune has more methane

Neptune has small amount of methane and water which gives it blue colour and white patches which distinguish it from uranus

For more information, visit

http://abyss.uoregon.edu/~js/ast121/lectures/lec20.html

Answer:

If you use P = 2 * pi * (L / g)^1/2  for the period of the simple pendulum

g = 4 * pi^2 * 1.2 / 2.8^2 = 6.04 m/s2

Note: omega = 2 pi * f = 2 pi / P  and omega = (g / L)^1/2

Answer:

6.0426 m/s^2

Explanation:

The period of a simple pendulum is equal to 2pi sqroot L/g

T = 280s/100 rev = 2.8s

Plug in 1.2 m for L and 2.8s for T, then solve for g to get 6.04 m/s^2 (dependent on how you round)

Answer: 0.0488 mm

Explanation:

Given

The position of the screen is [tex]D=0.80\ m[/tex]

Distance between alternating bright fringes is [tex]0.95\ cm[/tex]

The wavelength of the light source is [tex]\lambda =580\ nm[/tex]

Distance between successive bright fringes is [tex]\frac{\lambda D}{d}[/tex]

Distance between alternating bright fringes is half of the distance between successive fringes i.e. [tex]\frac{\lambda D}{2d}[/tex]

Insert the values for alternating fringes

[tex]\Rightarrow 0.95\times 10^{-2}=\dfrac{580\times 10^{-9}\times 0.8}{d}\quad [\text{d=separation of the doubleslits}]\\\\\Rightarrow d=\dfrac{464\times 10^{-9}}{0.95\times 10^{-2}}\\\\\Rightarrow d=488.42\times 10^{-7}\ m\\\Rightarrow d=0.0488\ mm[/tex]

Answer:

The person's velocity is zero.

Explanation:

Answer:

Solution given:

North car

mass[m1]=1460kg

velocity[u1]=27 m/s

mass[m2]=2165kg

velocity [u2]=18m/s

let v be velocity after collision

we have

From the principle of conservation of linear momentum

m1u1+m2u2=(m1+m2)v

1460*27+2165*18=(1460+2165)v

v=[tex] \frac{78390}{3625} [/tex]

v=21.6m/s

the speed after the collision in 21.6 m/s.

For angle.

Tan angle =[tex] \frac{m1u1}{m2u2} [/tex]

Tan angle =[tex] \frac{1460*27}{2165*18} [/tex]

Tan angle=327.74

angle=Tan-¹(327.74)=89.82=90°

in degrees north of east is 90°

Answer:

Applied Behavior Analysis therapy (ABA) is a type of intensive therapy that focuses on the principles and techniques of learning theory to help improve social behavior. ABA therapy helps to (1) develop new skills, (2) shape and refine previously learned skills, and (3) decrease socially significant problem behaviors.

Explanation:

Answer:

Permanent magnetism (of the steel)

make me brainliestt :))

Answer: The competition policy helps in development of the competition in the authority.

Explanation:

In consumer market competition exists between the producers. The main role of the competition policy is to promote competition in the market. It helps multiple businesses or individuals to utilize their resources efficiently and produce products at best quality and at cheapest prices. It allows the consumers to compare and purchase the better deal. It helps in starting of new businesses and also helps in increase in total production output. It is the result of the natural economic growth.

Answer:

[tex]E_{avg}=2.34*10^{-13}J/m^3[/tex]

Explanation:

From the question we are told that:

Frequency [tex]F=800KHz =800*10^3Hz[/tex]

Distance [tex]9.5km=9.5*10^3[/tex]

Electric field amplitude [tex]E=0.23V/m[/tex]

Generally the equation for Average electromagnetic energy density is mathematically given by

 [tex]E_{avg}=\frac{1}{2} \epsilon_0 E^2[/tex]

 [tex]E_{avg}=\frac{1}{2} 8.85*10^{-12}*(0.23)^2[/tex]

 [tex]E_{avg}=\frac{1}{2}* 8.85*10^{-12}*(0.23)^2[/tex]

 [tex]E_{avg}=2.34*10^{-13}J/m^3[/tex]

Therefore the  average electromagnetic energy density at that point

 [tex]E_{avg}=2.34*10^{-13}J/m^3[/tex]

Answer:

F = 580.75 N

Explanation:

The force can be calculated through the following formula:

[tex]F = PA[/tex]

where,

F = Force = ?

P = Pressure = (72 mm Hg)(133.322 Pa/1 mm Hg) = 9599.18 Pa

A = Area = (605 cm²)(1 m²/10⁴ cm²) = 0.0605 m²

Therefore,

[tex]F = (9599.18\ Pa)(0.0605\ m^2)[/tex]

F = 580.75 N

Answer:

a natural mixture of sand, gravel, and crushed stone

Explanation:

Soil formation occurs as a result of the the decay or the remains of plants and animals which are used up.

Weathering can be defined as the physical and chemical breakdown of rock into smaller pieces called sediment. Weathering can be classified into two categories namely;

I. Physical weathering : it is the process of breaking rocks into pieces without affecting its chemical composition e.g temperature, abrasion and frost action.

II. Chemical weathering : it is the process of breaking rocks into pieces by chemical action which leads to changes in its chemical composition e.g carbonation, hydration, plant acid and oxidation.

In Science, one of the type of land resource is generally referred to as an aggregate.

Typically, an aggregate is a natural mixture of sand, gravel, and crushed stone. It's a heterogeneous mixture that is commonly mixed with bitumen, gypsum, cement, lime and several other adhesive to form mortar or concrete which are used in building and constructions.

Answer:

C

Explanation:

It's correct have a nice day

Answer:

visible and ultraviolet