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3 years ago

Katie designed an experiment to show a water cycle process. The steps of the experiment are shown below.

1 answer:

6 0

Precipitation makes the most sense here. In basic terms, infiltration refers to the process whereby water enters the soil, transpiration refers to the movement of water out of a plant into the atmosphere and runoff is the flow of water over the earth's surface

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The Cosmoclock 21 Ferris wheel in Yokohama City, Japan, has a diameter of 100 m. Its name comes from its 60 arms, each of which

emmainna [20.7K]

Answer:

Explanation:

A ) angular velocity ω = 2π / T

= 2 x 3.14 / 60

= .10467 rad / s

linear velocity v = ω R

= .10467 x 50

= 5.23 m / s

centripetal force = m v² / R

= mg v² / gR

= 834 x 5.23² / 9.8 x 50

= 46.55 N

B )

apparent weight

= mg - centripetal force

= 834 - 46.55

= 787.45 N

C ) apparent weight

= mg + centripetal force

= 834 + 46.55

= 880.55 N.

D )

For apparent weight to be zero

centripetal force = mg

mg = mv² / R

v² = gR

= 9.8 x 50

= 490

v = 22.13 m /s

time period of revolution

= 2π R /v

2 x 3.14 x 50 / 22.13

= 14.19 s

8 0

3 years ago

A 75.0 W bulb is connected to a

adoni [48]

Answer:

Explanation:

W = 75 watts

V = 110 volts

Formula

W = V * I

Solution

75 = 110 * I Divide by 110

75 / 110 = I

I = 0.6818 Amperes

6 0

3 years ago

The energy flow to the earth from sunlight is about 2 1.4 kW>m . (a) Find the maximum values of the electric and mag- netic f

solmaris [256]

Complete question is;

The energy flow to the earth from sunlight is about 1.4kW/m²

(a) Find the maximum values of the electric and magnetic fields for a sinusoidal wave of this intensity.

(b) The distance from the earth to the sun is about 1.5 × 10^(11) m. Find the total power radiated by the sun.

Answer:

A) E_max ≈ 1026 V/m

B_max = 3.46 × 10^(-6) T

B) P = 3.95 × 10^(26) W

Explanation:

We are given;

Intensity; I = 1.4kW/m² = 1400 W/m²

Formula for maximum value of electric field in relation to intensity is given as;

E_max = √(2I/(ε_o•c))

Where;

ε_o is electric constant = 8.85 × 10^(-12) C²/N.m²

c is speed of light = 3 × 10^(8) m/s

Thus;

E_max = √(2 × 1400)/(8.85 × 10^(-12) × 3 × 10^(8)))

E_max ≈ 1026 V/m

Formula for maximum magnetic field is;

B_max = E_max/c

B_max = 1026/(3 × 10^(8))

B_max = 3.46 × 10^(-6) T

Formula for the total power is;

P = IA

Where;

A is area = 4πr²

We are given;

Radius; r = 1.5 × 10^(11) m

A = 4π × (1.5 × 10^(11))² = 2.82 × 10^(23) m²

P = 1400 × 2.82 × 10^(23)

P = 3.95 × 10^(26) W

5 0

3 years ago

Wagon wheel. While working on your latest novel about settlers crossing the Great Plains in a wagon train, you get into an argum

OverLord2011 [107]

Answer:

I = 16.7kgm²

Explanation:

Since, Torque is given by,

\tau = F*r = I*\alpha

here, I = Moment of inertia = ??

\alpha = angular acceleration of wheel = a/r

F = tangential tension acting on the wheel = T

a = acceleration of bag of sand = 2.95 m/s^2

r = radius of wheel = d/2 = 120/2 = 60 cm = 0.60 m

from force balance on sand bag,

mg - T = m*a

T = m*(g-a)

m = mass of sand bag = 20 kg

So, I = T*r/\alpha = m*(g-a)*r/(a/r)

Using known values:

I = 20*(9.81 - 2.95)*0.60/(2.95/0.60) = 16.74

I = 16.7 kgm² = Moment of inertia of wheel experimentally

also, Moment of inertia of wheel theoretically(I') = M*r²

given, M = mass of wheel = 70 kg

I' = 70*0.60²= 25.2 kgm² = Moment of inertia of wheel theoretically

7 0

3 years ago

Is a negatively ionized lithium paste a conductor or insulator

Elenna [48]

Answer:

A negatively ionized lithium paste is a conductor.

Explanation:

A conductor is a material that conducts electricity. In other words, a conductor has little resistance to the movement of electric charge or electrons when an electric field is applied.

Insulating materials for electricity are those that offer a certain resistance to the movement of electrons or electric current. In other words, an electrical insulator is a material with a low capacity for conducting electricity.

The best conductors of electric current are metals due to the free electron clouds that favor the circulation of electric current through them.

So, <u><em>a negatively ionized lithium paste is a conductor. </em></u>

5 0

3 years ago