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Kobotan [32]
3 years ago
8

Compare the Moon phases from Feb 16 through Feb 20.

Physics
1 answer:
forsale [732]3 years ago
4 0

Answer:

The phases occur because the Sun lights different parts of the Moon as the Moon revolves around the Earth. That means the reason we see different phases of the Moon here on Earth is that we only see the parts of the Moon that are being lit up by the Sun.

You might be interested in
Factfile about eclips
MAXImum [283]
Its quite hard to give you facts over this but just type into google facts about the sonar/lunar eclipse.

6 0
4 years ago
Calculate the maximum capillary rise/fall of mercury in a 0.5 mm radius glass capillary. Assume that the surface tension for mer
tekilochka [14]

Answer: 0.01 m

Explanation: The formulae for capillarity rise or fall is given below as

h = (2T×cosθ)/rpg

Where θ = angle mercury made with glass = 50°

T = surface tension = 0.51 N/m

g = acceleration due gravity = 9.8 m/s²

r = radius of tube = 0.5mm = 0.0005m

p = density of mercury.

h = height of rise or fall

From the question, specific gravity of density = 13.3

Where specific gravity = density of mercury/ density of water, where density of water = 1000 kg/m³

Hence density of mercury = 13.3×1000 = 13,300 kg/m³.

By substituting parameters, we have that

h = 2×0.51×cos 50/0.0005×9.8×13,300

h = 0.6556/65.17

h = 0.01 m

8 0
3 years ago
Calculate the escape speed for a spacecraft from the surface of (a) mars; and from the surface of (b) jupiter. ( the escape spee
Len [333]
The escape speed for a spacecraft at the surface of a planet of mass M and radius R is:
v= \sqrt{ \frac{2GM}{R} }
where G is the gravitational constant. We can use this formula to solve both parts of the problem, using the data of Jupiter and Mars.

a) Mars:
Mars mass is M=6.4 \cdot 10^{24}kg, while Mars radius is R=3.4 \cdot 10^6 m, so the escape speed of the spacecraft at Mars surface is
v= \sqrt{ \frac{2 (6.67 \cdot 10^{-11} m^3 kg^{-1} s^{-2})(6.4 \cdot 10^{24} kg)}{3.4 \cdot 10^6 m} }= 5011 m/s = 5.01 km/s

b) Jupiter:
Jupiter mass is M=1.9 \cdot 10^{27} kg while its radius is R=7.15 \cdot 10^7 m, so the escape speed at its surface is
v= \sqrt{ \frac{2 (6.67 \cdot 10^{-11} m^3 kg^{-1}s^{-2})(1.9 \cdot 10^{27} kg)}{7.15 \cdot 10^7 m} }=5.95 \cdot 10^4 m/s = 59.5 km/s

3 0
4 years ago
John walked from his home to work, it took him 12 min and the distance covered was 3 km. calculate the average speed in m/s
Svetlanka [38]

Answer:

4.167

Explanation:

ittravels 4.167metres per second

8 0
2 years ago
Why should a building have better thermal insulation placed in its ceiling than in its walls
kupik [55]

Answer:

In a building, heat rises. By putting the insulation in the ceiling heat will rise and get trapped at the top and fill up the entire room. The purpose of insulation is to minimize the transmission of heat within the walls, floors, and ceilings. By minimizing the transmission of heat, you not only keep the room warm but you also lower your electricity and heat bill.

4 0
3 years ago
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