Answer:
a
b
Explanation:
From the question we are told that
The area of Manhattan is
The area of the ice is
The thickness is
Generally the volume of the ice is mathematically represented is
substituting value
Generally the mass of the ice is
Here is the density of ice the value is
=>
=>
Generally the energy needed for the ice to melt is mathematically represented as
Where is the latent heat of fusion of ice and the value is
=>
=>
Considering part b
We are told that the annual energy consumption is
So the time taken to melt the ice is
converting to days
The ballpoint from a pen at a distance of about <u>4000</u> kilometers.
Alpha Centauri is the closest star device. Distance from Earth 4,365 al (forty 000 billion kilometers. The solar (yellow famous person) distance from Earth is 150 000 000 km, the exoplanet distance from Alpha Centauri b (orange famous person) 6 000 000 km.
Shifts in starlight from Proxima Centauri, found over extra than 2 years, screen its 1/3 planet. Astronomers have observed a 3rd planet orbiting Proxima Centauri, the star closest to the solar.
Proxima Centauri, the nearest megastar to our own, remains forty,208,000,000,000 km away. (Or about 268,770 AU.)
Learn more about the nearest stars here brainly.com/question/21107590
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The optimum wavelength is 450 nm because that is the wavelength of maximum absorbance by FeSCN2+(aq)
you should choose a wavelength with maximum absorbance. In this case, you are using the scattered light, not the absorbed light as your signal. So you should avoid wavelengths where there are absorption peaks.
<h3>What is wavelength ?</h3>
A waveform signal that is carried in space or down a wire has a wavelength, which is the separation between two identical places (adjacent crests) in the consecutive cycles. This length is typically defined in wireless systems in metres (m), centimetres (cm), or millimetres (mm) (mm).
- The distance between two waves' crests serves as an illustration of wavelength. When you and another person have the same overall mindset and can easily communicate, that is an example of being on the same wavelength.
Learn more about Wavelength here:
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This looks so scary just because there are so many parts to it.
Take them one at a time:
<u>First piece:</u>
From rest, accelerates 1.8 m/s² for 15 sec.
Speed at the end of the 15 sec = 1.8 x 15 = 27 m/s
Distance covered = (average speed) x (time) = (13.5) x (15) = 202.5 meters
<u>Middle piece:</u>
Starts this piece at 27 m/s.
Runs at constant speed for 35 sec.
Covers (27 x 35) = 945 meters
Finishes this piece (15 + 35) = 50 seconds after leaving the first station
Finishes this piece (202.5 + 945) = 1147.5 meters from the first station.
<u>Last piece:</u>
Starts this piece 50 seconds after leaving the first station,
1147.5 meters from it, still moving at 27 m/s.
Decelerates at 2.0 m/s² .
--> It takes 27/2.0 = 13.5 seconds to come to a stop.
--> Distance covered during this piece = (average speed) x (time)
= (13.5 m/s) x (13.5 sec) = 182.25 meters
Finishes this piece (50 + 13.5) = 63.5 seconds after leaving the first station
Finishes this piece (1147.5 + 182.25) = 1,329.75 m from the first station
Distance between the stations (along the track) = 1,329.75 meters.
Average speed = (total distance) / (total time) = 1,329.75 / 63.5 = 20.941 m/s.
I sure hope I didn't make any stupid arithmetic blunders here,
because I really don't feel like going back and checking it.
Let me know, and I'll fix them.
Their separation would be constant if they were both falling at the same speed. But they're not. A falling object falls 9.8 m/s faster every second than it fell in the previous second.
So the one that dropped first ... and had an extra second to fall ... is always falling faster than the one that dropped later. So it keeps getting farther ahead.