He is best known for publishing an almanac based on my astronomical calculations. Who is it?

-What do you think happened to make the Moon look the way it does?

goldenfox [79]

Answer: The physics of evolution had made the moon like it is today....Please watch this video from you tube about the evolution of the moon.

Explanation:

https://youtu.be/UIKmSQqp8wY

5 0

3 years ago

Examine the spectra of the four unknown substances shown below. What can you conclude?

NARA [144]

Line spectra are obtained when individual elements are heated using a high-voltage electrical discharge. This heating causes excitation of the element and a subsequent emission of distinct lines of colored light are obtained. Each element has its own unique emission line spectrum; therefore, if any of the tested substances were the same, their spectra would match. However, this is not the case so none of the substances are the same.

7 0

3 years ago

Read 2 more answers

Orion is visible on winter evenings in the northern hemisphere but not summer evenings because of_______________.

Bess [88]

Answer:

c. the location of Earth in its orbit.

Explanation:

It is known that the earth orbits the sun once every 365 days, during this time the<u> constellations that are visible in the sky are changing</u>.

This is due to the fact that depending on the position, we have access to different parts of the celestial tomb, that is, the stars and constellations visible from earth.

This is why Orion is visible in winter but not in summer, since in summer it is in a <u>different part of the orbit</u> and with visibility towards different constellations.

the answer is c. the location of Earth in its orbit.

3 0

3 years ago

A solenoid of length 0.700 m having a circular cross-section of radius 5.00 cm stores 6.00 µJ of energy when a 0.400-A current r

Lorico [155]

Answer:

N/l = 104

Explanation:

Energy stored in the inductor is given by the formula

$U = \frac{1}{2}Li^2$

now we have

$6\times 10^{-6} = \frac{1}{2}L(0.400)^2$

now we have

$L = 7.5 \times 10^{-5}$

now we have

$L = \frac{\mu_0 N^2 \pi r^2}{l}$

$7.5 \times 10^{-5} = \frac{4\pi \times 10^{-7} N^2 \pi(0.05)^2}{0.7}$

$N = 73 turns$

now winding density is turns per unit length

$N/l = 104$

7 0

3 years ago

Would someone just answer this?

Makovka662 [10]

Answer:

Explanation:

Answer:

magnitude=34.45 m

direction=

Explanation:

Assuming the initial point P1 of this vector is at the origin:

P1=(X1,Y1)=(0,0)

And knowing the other point is P2=(X2,Y2)=(19.5,28.4)

We can find the magnitude and direction of this vector, taking into account a vector has a initial and a final point, with an x-component and a y-component.

For the magnitude we will use the formula to calculate the distance between two points:

(1)

(2)

(3)

(4) This is the magnitude of the vector

For the direction, which is the measure of the angle the vector makes with a horizontal line, we will use the following formula:

(5)

(6)

(7)

Finding :

(8)

(9) This is the direction of the vector

3 0

3 years ago