1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Doss [256]
3 years ago
11

When are the two days of equinox

Physics
2 answers:
galina1969 [7]3 years ago
5 0
March 20 and September 22
oee [108]3 years ago
4 0
- around March 21
- around September 22
You might be interested in
A certain atom has 26 protons, 26 electrons, and 30 neutrons. It mass number is?
pishuonlain [190]

The most common atom of iron has 26 protons and 30 neutrons in its nucleus. What are its atomic number, atomic mass, and number of electrons if it is electrically neutral? This atom has atomic number 26, atomic mass 56, and has 26 electrons.

4 0
3 years ago
Read 2 more answers
What is another word for cycles per second??
Hatshy [7]
Frequensey or hertz, I looked this up on the internet!
5 0
3 years ago
Gaussian surfaces A and B enclose the same positive charge+Q. The area of Gaussian surface A is three times larger than that of
GalinKa [24]

Answer:

D) equal to the flux of electric field through the Gaussian surface B.

Explanation:

Flux through S(A) = Flux through S (B ) =  Charge inside/ ∈₀

4 0
3 years ago
Consider a 20 cm thick granite wall with a thermal conductivity of 2.79 W/m·K. The temperature of the left surface is held const
kozerog [31]

Answer:

The right wall surface temperature and heat flux through the wall is 35.5°C and 202.3W/m²

Explanation:

Thickness of the wall is  L=  20cm = 0.2m

Thermal conductivity of the wall is  K = 2.79 W/m·K

Temperature at the left side surface is T₁ =  50°C

Temperature of the air is T = 22°C

Convection heat transfer coefficient is  h = 15 W/m2·K

Heat conduction process through wall is equal to the heat convection process so

Q_{conduction} = Q_{convection}

Expression for the heat conduction process is

Q_{conduction} = \frac{K(T_1 - T)}{L}

Expression for the heat convection process is

Q_{convection} = h(T_2 - T)

Substitute the expressions of conduction and convection in equation above

Q_{conduction} = Q_{convection}

\frac{K(T_1 - T_2)}{L} = h(T_2 - T)

Substitute the values in above equation

\frac{2.79(50- T_2)}{0.2} = 15(T_2 - 22)\\\\T_2 = 35.5^\circC

Now heat flux through the wall can be calculated as

q_{flux} = Q_{conduction} \\\\q_{flux}  = \frac{K(T_1 - T_2)}{L}\\\\q_{flux}  = \frac{2.79(50 - 35.5)}{0.2}\\\\q_{flux} = 202.3W/m^2

Thus, the right wall surface temperature and heat flux through the wall is 35.5°C and 202.3W/m²

6 0
3 years ago
What do scientist use to determine the temperature of a star
REY [17]

Color is what scientist use to determine the temperature of a star!

hope this helps!

4 0
3 years ago
Other questions:
  • Wave A has a longer wavelength than wave B, but their amplitudes are the same. Which carries more energy?
    8·2 answers
  • The reciprocal of resistance or measure of a devices ability to conduct is called
    13·1 answer
  • A ball is projected into the air with 100 j of kinetic energy which is transformed to gravitational potential energy at the top
    12·1 answer
  • A single polarizer will stop _____ of the incoming light.
    5·2 answers
  • Factors that influence Wellness
    8·1 answer
  • What does intonation refer to select one of the options below as your answer:a. the change in the pitch (high or low sound of th
    8·1 answer
  • At its nearest, Venus comes within about 41 million km of Earth. How distant is it at its farthest?
    8·2 answers
  • Can somone help me with this problem I have been stuck on it for a while. The answer is 17.1m but I dont understand how to get i
    10·1 answer
  • Joe loves joe so yes​
    12·2 answers
  • What Coulombs discovered almost 300<br> years ago
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!