All categories

4 years ago

One star is emitting primarily visible light and another star is emitting primarily infrared light. which star is hotter?

Physics

1 answer:

Leona [35]4 years ago

7 0

The star that would be hotter would be; the star emitting visible light.

You might be interested in

The simplest form of a traveling electromagnetic wave is a plane wave. For a wave traveling in the x direction whose electric fi

e-lub [12.9K]

Answer:

please the answer below

Explanation:

A general electromagnetic plane wave, traveling in the x direction, can be expressed in the form:

$\vec{E}=E_0e^{-i(k\cdot x-\omega t)}\hat{j}\\\\\vec{B}=B_0e^{-i(k\cdot x-\omega t)}\hat{k}\\\\$ (1)

a. amplitudes

from (1) we can observe that E_0 and B_0 are the amplitudes.

2. frequency

By replacing (1) we obtain:

$\vec{E}=E_0e^{-i(k(0)-\omega t)}\hat{j}=E_0[cos\omega t+sin\omega t]\hat{j}$

the wave respond to the followinf physical variables: amplitude, frequency, time and position, as we can see in (1).

hope this helps!!

7 0

3 years ago

Can someone please help me answer 14 and 15??

ziro4ka [17]

14. The Aurora is an incredible light show caused by collisions between electrically charged particles released from the sun that enter the earth's atmosphere and collide with gases such as oxygen and nitrogen. The lights are seen around the magnetic poles of the northern and southern hemispheres.

15.
About 5.4 billion years from now, the sun will have exhausted all of its hydrogen. The sun's core will get really hot and dense, thus shrinking; however, the outer region of the sun will expand and grow. ... Even if the expanding dying sun doesn't reach Earth, the sun's high temperatures will completely burn the planet.

7 0

4 years ago

A uranium nucleus 238U may stay in one piece for billions of years, but sooner or later it decays into an α particle of mass 6.6

ale4655 [162]

Answer: The recoil speed is - 8.9604. $10^{4}$ m/s.

Explanation: According to the Third Law of Newton, every action has an oppsite and equal reaction, and the Second Law of Newton, Force=mass·acceleration. Acceleration is a variation in velocity by any given time, so Force = mass·velocity·time.

Combining the two laws, there is : m1·v1 = - m2·v2. This is the Law of Conservation of Momentum.

Substituting and calculating:

v2 = - ( $\frac{m1}{m2}$ ) · v1

v2 = - $\frac{6.64.10^{-27} }{3.88.10^{-25} }$ · 5.24. $10^{6}$

v2 = - 8.9604. $10^{4}$

The recoil speed of the thorium nucleus is - 8.9604. $10^{4}$ m/s.

8 0

4 years ago

The high school tennis team is made up of boys and girls. The team has a total of 25 players. 8 of the players are girls. If a p

vekshin1

Probability of it being a boy is 17/25 which is .68

4 0

4 years ago

A round asteroid has a surface gravity of .0288 m/s^2 if the mass of the asteroid is 1.10 x10^18 kg what is its radius

Oduvanchick [21]

Answer:

r = 50.47 x 10³ m = 50.47 km

Explanation:

Using the formula for the acceleration due to gravity:

$g = \frac{Gm}{r^2}$

where,

g = acceleration due to gravity on the surface of asteroid = 0.0288 m/s²

G = Universal Gravitational Constant = 6.67 x 10⁻¹¹ Nm²/kg²

m= mass of asteroid = 1.1 x 10¹⁸ kg

r = radius of asteroid = ?

Therefore,

$0.0288\ m/s^2 = \frac{(6.67\ x\ 10^{-11}\ Nm^2/kg^2)(1.1\ x\ 10^{18}\ kg)}{r^2} \\\\r = \sqrt{\frac{(6.67\ x\ 10^{-11}\ Nm^2/kg^2)(1.1\ x\ 10^{18}\ kg)}{0.0288\ m/s^2}}$

6 0

3 years ago