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
EastWind [94]
3 years ago
6

The cycle of day and night is a result of Earth’s spinning on its axis, which is Earth’s .

Physics
1 answer:
nekit [7.7K]3 years ago
5 0

Answer:

Rotation

Explanation:

i did the test Gl.

You might be interested in
7. A particle is forced to move in a straight line path. It returns to the starting point after 10 s. The total distance covered
lutik1710 [3]

d. All three statements are true.

8 0
1 year ago
A supersonic nozzle is also a convergent–divergent duct, which is fed by a large reservoir at the inlet to the nozzle. In the re
Lady_Fox [76]

Answer:

155.38424 K

2.2721 kg/m³

Explanation:

P_1 = Pressure at reservoir = 10 atm

T_1 = Temperature at reservoir = 300 K

P_2 = Pressure at exit = 1 atm

T_2 = Temperature at exit

R_s = Mass-specific gas constant = 287 J/kgK

\gamma = Specific heat ratio = 1.4 for air

For isentropic flow

\frac{T_2}{T_1}=\frac{P_2}{P_1}^{\frac{\gamma-1}{\gamma}}\\\Rightarrow T_2=T_1\times \frac{P_2}{P_1}^{\frac{\gamma-1}{\gamma}}\\\Rightarrow T_2=00\times \left(\frac{1}{10}\right)^{\frac{1.4-1}{1.4}}\\\Rightarrow T_2=155.38424\ K

The temperature of the flow at the exit is 155.38424 K

From the ideal equation density is given by

\rho_2=\frac{P_2}{R_sT_2}\\\Rightarrow \rho=\frac{1\times 101325}{287\times 155.38424}\\\Rightarrow \rho=2.2721\ kg/m^3

The density of the flow at the exit is 2.2721 kg/m³

4 0
3 years ago
Please help on this one!!
inysia [295]

The energy transformations that occur as you coast down long hill on a bicycle, including the brakes to make the bike stop at the bottom, is that at the top of the hill you have high GPE AND LOW KE, on your way down you have HIGH KE AND LOW GPE, and at the bottom you have thermal energy due to the stop of the brakes.

the law of conversation of energy and describe the energy transformations that occur as you coast down a long hill on a bicycle and then apply the brakes to make the bike stop at the bottom.


3 0
3 years ago
Two planets have the same surface gravity, but planet b has twice the radius of planet
vampirchik [111]
Planet A;
m = the mass 
Let r =  the radius 

Planet B:
Let M =  the mass
The radius is 2r (twice the radius of planet A)

The surface gravitational acceleration of planets A and B (they have the same surface gravity) are
g= \frac{Gm}{r^{2}} \, and \, g= \frac{GM}{(2r)^{2}} \\\\ m= \frac{M}{4} \\\\ M=4m

Answer: The mass of planet B is 4m.
3 0
3 years ago
Read 2 more answers
Converted to<br> Energy<br> Electricity powers the lights<br> for a building.
Slav-nsk [51]

Answer:

More than enough solar energy (8.2 million quad BTUs, 1 quad = 2.9 x1011 kWh) hits Earth's surface each year to meet all of societies' needs. Currently we use about 400 quads per year to run our society. Good building design allows passive use of sunlight to heat homes. Simple solar collectors are used to heat water and cook food. As useful as it is for these purposes, thermal energy from sunlight is still a low quality energy compared to electricity. Computers, most machinery, light bulbs, subway trains, and much more all require electricity. It is possible to turn thermal energy from the sun into electricity. In this unit we will examine how.

. We will also examine how to make electricity directly from light using the photovoltaic cells.

6 0
3 years ago
Other questions:
  • A bumper has a non negligible mass. After a collision with an ideal spring, the spring is compressed to a distance of 90% of the
    8·1 answer
  • Any help is appreciated
    7·1 answer
  • the lenses in a students eyes have arefractive power of 52. 0 diopters when she is able to focus on the board if the distance be
    7·1 answer
  • a skydiver with a mass of 60 kg jumps out of an airplane at a height of 5 5000m. the acceleration due to gravity is 9.8 m/s2. wh
    14·1 answer
  • If the accuracy in measuring the position of a particle increases, the accuracy in measuring its velocity will
    11·1 answer
  • Scientists in a test lab are testing the hardness of a surface before constructing a building. Calculations indicate that the en
    8·1 answer
  • Find an expression for the electric field e⃗ at the center of the semicircle. hint: a small piece of arc length δs spans a small
    12·1 answer
  • a turtle swimming in a straight line toward shore has a speed of 0.50 m/s after 4.0s its speed is 0.80 m/s what is the turtle's
    6·1 answer
  • I appreciate any help I get on this, thank you in advanced :)
    9·1 answer
  • A silk cloth gains electrons when rubbed over a glass rod. a different glass rod gains electrons when rubbed with rabbit fur. wh
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!