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ZanzabumX [31]
2 years ago
13

Stars that are not very hot but give off a lot of light are

Physics
2 answers:
melomori [17]2 years ago
6 0

\huge{\textbf{\textsf{{\color{navy}{An}}{\purple{sw}}{\pink{er}} {\color{pink}{:}}}}}

Giants.

  • thanks
  • hope it helps.
MAVERICK [17]2 years ago
3 0

Explanation:

giants are those stars that are not so hot but give a lot of light

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Properties of light that define light as a wave?
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The first choices are correct, because the second choices could happen by things other than light.
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What is a compound composed of two elements that share valence electrons?
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A physics professor demonstrates the Doppler effect by tying a 600 Hz sound generator to a 1.0-m-long rope and whirling it aroun
VARVARA [1.3K]

Answer:

(a) f= 622.79 Hz

(b) f= 578.82 Hz

Explanation:

Given Data

Frequency= 600 Hz

Distance=1.0 m

n=120 rpm

Temperature =20 degree

Before solve this problem we need to find The sound generator moves on a circular with tangential velocity

So

Speed of sound is given by

c = √(γ·R·T/M) ............in an ideal gas

where γ heat capacity ratio

R universal gas constant

T absolute temperature

M molar mass

The speed of sound at 20°C is

c = √(1.40 ×8.314472J/molK ×293.15K  / 0.0289645kg/mol)

c= 343.24m/s

The sound moves on a circular with tangential velocity

vt = ω·r.................where   ω=2·π·n

vt= 2·π·n·r

vt= 2·π · 120min⁻¹ · 1m

vt= 753.6 m/min  

convert m/min to m/sec

vt= 12.56 m/s

Part A

For maximum frequency is observed  

v = vt

f = f₀/(1 - vt/c )

f= 600Hz / (1 - (12.56m/s / 343.24m/s) )  

f= 622.789 Hz

Part B

For minimum frequency is observed

v = -vt

f = f₀/(1 + vt/c )

f= 600Hz / (1 + (12.56m/s / 343.24m/s) )

f= 578.82 Hz

3 0
2 years ago
A crane exerts a net force of 900 N upward on a 750-kilogram car as the crane starts to lift the
Darya [45]

The acceleration of the car is 1.2 m/s^2 upward

Explanation:

We can solve the question by using Newton's Second Law of motion, which states that:

F=ma

where

F is the net force exerted on an object

m is the mass of the object

a is its acceleration

In this problem, we know that:

F = 900 N is the net force exerted on the car

m = 750 kg is the mass of the car

Solving the equation for a, we find the acceleration of the car:

a=\frac{F}{m}=\frac{900}{750}=1.2 m/s^2

and it is in the same direction as the force (upward).

Learn more about Newton's second law of motion here:

brainly.com/question/3820012

#LearnwithBrainly

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A runner starts at position A. He runs 40 m North, 10 m East and 40 m
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The answer is C.) 10 m East
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