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sesenic [268]
3 years ago
7

Which of the following numbers most closely represents the number of galaxies in the universe?

Physics
1 answer:
Brut [27]3 years ago
8 0
There are an estimated 100 billion, so the answer would be D.) Billions
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Declination of a star is similar to Earth's:<br> latitude<br> longitude<br> rotation<br> inclination
balu736 [363]
Ight Ascension and Declination<span> are a system of coordinates used in astronomy to determine the location of</span>stars<span>, planets and other objects in the night sky. They are </span>similar<span> to the system of </span>longitude<span> and </span>latitude<span>used to locate places on </span>Earth<span>.</span>
6 0
3 years ago
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1) The current in a light bulb is 0.335 Amps. How long does it take for a total charge of 2.76 C to
uysha [10]

Answer:

Time=8.23880597 seconds

Explanation:

Quantity of charge(q)=2.76c

Current(I)=0.335A

Time(t)=?

t=q/I

t=2.76/0.335

t=8.23880597seconds

7 0
3 years ago
An earthquake releases two types of traveling seismic waves, called transverse and longitudinal waves. The average speed of the
Norma-Jean [14]

Answer:

1083.173 km

Explanation:

Speed of longitudinal waves = 9.1 km/s

Speed of transverse waves = 5.7 km/s

Time taken by the longitudinal wave is t

Time taken by the transverse wave is t+71

Distance = Speed × Time

Distance traveled by the longitudinal wave

\text{Distance}=9.1t

Distance traveled by the transverse wave

\text{Distance}=5.7(t+71)

Since both distances are equal

9.1t=5.7(t+71)\\\Rightarrow 9.1t-5.7t=404.7\\\Rightarrow 3.4t=404.7\\\Rightarrow t=\frac{404.7}{3.4}=119.03\ s

The time taken by the longitudinal wave is 119.03 seconds

Distance traveled by the longitudinal wave

9.1t=9.1\times 119.03=1083.173\ km

The earthquake is 1083.173 km away

7 0
4 years ago
A foam material has a density of 175 g/l. what is its density in units of lb/ft3?
Oksi-84 [34.3K]

The solution would be like this for this specific problem:

 

Given: 175 g/L

1 gram/liter  =  0.06242796 pound/cubic foot

175 g/L * 0.06242796 pound/cubic foot

= 10.924893 lb/ft3

So, a foam material has a density of 10.924893 lb/ft3 in units of lb/ft3.

4 0
3 years ago
Lena helps a child who is choking on his food. Which reliable method prepared her for helping with this injury?
Ivanshal [37]

knowledge of first aid ... eg St John Ambulance, Red Cross etc. I think that everyone in a school should be taught First Aid.

7 0
3 years ago
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