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Lady bird [3.3K]
3 years ago
7

The granulation pattern that astronomers have observed on the surface of the Sun tells us that: a. the Sun is a lot cooler on th

e inside than on the outside b. the Sun's surface is made of a thin solid that cracks easily c. hot material must be rising from the Sun's hotter interior d. the solar wind must consist of very small (low-mass) particles e. the Sun accumulates a lot of dirt and dust because of its large gravity 5. Which statement about the Sun’s rotation is TRUE?
Physics
1 answer:
Norma-Jean [14]3 years ago
4 0

Answer:

c. hot material must be rising from the Sun's hotter interior

Explanation:

Granulation is the grainy appearance of the solar photosphere produced by the top of the convection cells in the sun.

The grainy appearance are produced by granules on the photosphere of the sun and granules are caused by convection currents of plasma within the sun's convection zone.

The interior of these granules are brighter (and thus hotter) than the exterior of the granules which are darker.

<u>So, the granulation pattern that astronomers have observed on the surface of the Sun tells us that hot material must be rising from the Sun's hotter interior.</u>

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A 2.02 nF capacitor with an initial charge of 4.55 µC is discharged through a 1.22 kΩ resistor. (a) Calculate the current in the
Mandarinka [93]

Answer:

a) 0.048A

b) 0.18µC

c) 1.85A

Explanation:

The discharged current of the capacitor as a function of time is given by:

i=\frac{q_o}{RC}*e^{-\frac{t}{\tau}}\\where:\\\tau=RC\\

\tau=1.22*10^3*2.02*10^{-9}\\\tau=2.46*10^{-6}s

a)

i=\frac{4.55\µC}{2.46\µs}*e^{-\frac{9\µs}{2.46\µs}}\\\\i=0.048A

b)

q=q_o*e^{-\frac{t}{\tau}}

q=4.55\µC*e^{-\frac{8\µs}{2.46\µs}}\\q=0.18\µC

c) the maximum current occurs when t=0

i=\frac{4.55\µC}{2.46\µs}*e^{-\frac{0\µs}{2.46\µs}}\\\\i=1.85A

6 0
3 years ago
The lightest and heaviest flying birds are the bee hummingbird of Cuba, which weighs about 1.6 grams, and the great bustard of E
VMariaS [17]

Answer:

for the birds to be able to stay vertical in flight without falling down to earth, they must produce a lift that will counteract their weight

for the small bee humming bird,

mass = 1.6 g = 1.6 x 10^{-3}  kg

weight of the bird under acceleration due to gravity = mg

where g = acceleration due to gravity = 9.81 m/s^2

weight of the bird = 1.6 x 10^{-3}  x 9.806 = 0.0156 ≅ 0.016 N

for this bird to maintain flight, the least lift upward, it must generate must be equal to its weight downwards, i.e

lift = weight

therefore,

lift = <em>0.016 N</em>

<em></em>

For the bustard of Europe and Asia,

mass = 21 kg

weight of the bird under acceleration due to gravity = mg

weight of the bird = 21 x 9.806 = 205.9 N

lift = weight =  <em>205.9 N</em>

<em></em>

<em>lift generated is proportional to the wing surface area according to the lift equation</em>

L = Cs x p x \frac{v}{2} x S

where L = lift

C = lift coefficient

p = density of air

v = relative velocity of bird and air

S = surface are of the wing.

<em>The great bustard will have a proportionally larger wing area to hold its weight in flight</em>

<em></em>

7 0
3 years ago
Part A
statuscvo [17]
The relation between intensity and distance is given by:

I=Pd2
I
=
P
d
2
I=
d
2

P
​


Therefore we can write an equation

6 0
3 years ago
A printed circuit board has eight different locations in which a component can be placed. If five identical components are to be
Luba_88 [7]

The number of possible designs that are achievable are= 56.

<h3>Calculation using combination</h3>

The number of locations placed on the board,n = 8

The number of identical components, r = 5

The number of different designs that are possible can be calculated using the combination. This is because they are identical so the order in which they are selected does not matter.

The formula for combination =

\frac{n!}{(n-r)r!}

That is

\frac{8!}{(8-5)5!}

\frac{8×7×6×5!}{3×2×1×5!}

\frac{8 \times 7 \times 6}{3 \times 2 \times 1}

336/6 = 56

Therefore, the number of possible designs that are achievable are = 56

Learn more about combination here:

brainly.com/question/11732255

3 0
3 years ago
1.Which of the following is the best example of motion?A.Waving your armsB.Tossing and turning in your bedC.Walking from home to
vlabodo [156]

Answer:

A

Explanation:

4 0
3 years ago
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