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3 years ago

Which stars have the lowest absolute brightness?

Physics

2 answers:

andrezito [222]3 years ago

8 0

I think Dwarfs, but I’m not positive

inna [77]3 years ago

8 0

Dwarf Stars, they release energy in inefficient methods, taking many trillions of years to die off, though they are still hot enough to shine dimly

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The terminals of a 0.70 Vwatch battery are connected by a 80.0-m-long gold wire with a diameter of 0.200 mm What is the current

Molodets [167]

Answer:

I = 11.26 mA

Explanation:

given,

V = 0.7 V length = 80 m

diameter = 0.2 mm = 0.02 cm

radius = 0.01 × 10⁻² m

$resistance = \dfarc{\rho l}{A}$

ρ for gold wire = 2.44 × 10⁻⁸ ohm-m at 20 °C

A = cross sectional area = π r² = π (0.01 × 10⁻² )²

= 31.4× 10⁻⁹ m²

$resistance = \dfarc{2.44\times 10^{-8} \times 80}{31.4\times 10^{-9}}$

R = 62.165 Ω

$I = \dfrac{V}{R}$

$I = \dfrac{0.7}{62.165}$

I = 11.26 mA

8 0

3 years ago

A 0.20-kg object is attached to the end of an ideal horizontal spring that has a spring constant of 120 N/m. The simple harmonic

miss Akunina [59]

Answer:

0.07756 m

Explanation:

Given mass of object =0.20 kg

spring constant = 120 n/m

maximum speed = 1.9 m/sec

We have to find the amplitude of the motion

We know that maximum speed of the object when it is in harmonic motion is given by $v_{max}=A\omega$ where A is amplitude and $\omega$ is angular velocity

Angular velocity is given by $\omega=\sqrt{\frac{k}{m}}$ where k is spring constant and m is mass

So $v_{max}=A\sqrt{\frac{k}{m}}$

$A=V_{max}\sqrt{\frac{m}{k}}=1.9\times \sqrt{\frac{0.2}{120}}=0.07756 \ m$

3 0

3 years ago

Read 2 more answers

I need to know the answer to number 4

Alona [7]

I learned this one in Middle School too

Baby Godzilla Eats Hotdogs, Not Cocca Puffs

Belize Guatemala El Salvador Honduras Nicaragua Costa Rica Panama

I hope I helped

ΩΩΩΩΩΩΩΩΩΩ

8 0

3 years ago

Problem 16.71 A bowler projects an 8-in.-diameter ball weighing 12 lb along an alley with a forward velocity v0 of 15 ft/s and a

alex41 [277]

Answer:

Find the attachments for complete solution

4 0

3 years ago

What are the primary function of light

Yuliya22 [10]

Answer:

Forgot letter

Explanation:

To convert solar energy into chemical energy in the form of NADPH and ATP. First stage of photosynthesis.

Hope this helps.

3 0

3 years ago