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eduard
4 years ago
7

Physics includes the study of using radio waves to explore stars and identify other planets.

Physics
2 answers:
marysya [2.9K]4 years ago
6 0
I think it should be true
zimovet [89]4 years ago
4 0
Yeah the answer is true
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You pour 250 g of tea into a Styrofoam cup, initially at 80∘C and stir in a little sugar using a 100-g aluminum 20∘C spoon and l
jok3333 [9.3K]

To solve this problem it is necessary to apply the concepts related to the conservation of energy and heat transferred in a body.

By definition we know that the heat lost must be equal to the heat gained, ie

Q_g = Q_l

Where,

Q = Heat exchange

The heat exchange is defined as

Q = c_p m \Delta T

Where,

c_p = Specific heat

m = mass

\Delta T= Change in Temperature

Therefore replacing we have that

Q_g = Q_l

c_{p-tea} m \Delta T =  c_{p-al} m \Delta T

Replacing with our values we have that

0.25*4180*(80-T) = 0.1*900*(T-20)

11.61*(80-T) = T-20

T= \frac{948.8}{11.61}

T = 75.24\°C

Therefore the highest possible temperature of the spoon when you finally take it out of the cup is 75.24°C

3 0
3 years ago
What do the single electrons in nitrogen do for a triple bond?​
kirza4 [7]

Nitrogen could form 3 bonds based on octet rule, because it has 5 valence electrons. That means it needs 3 bonds.

Explanation:

  • A nitrogen atom can fill its octet by sharing three electrons with another nitrogen atom, forming three covalent bonds, a so-called triple bond.
  • A triple bond isn't quite three times as strong as a single bond, but it's a very strong bond.
  • Every covalent bond is a sharing of two electrons between two atoms. A double bond is 4 electrons being shared (2x2). Therefore a triple bond is 6 electrons being shared (2x3)
  • Triple bonds are stronger than double bonds due to the the presence of two pi bonds rather than one.
  • Each carbon has two sp hybrid orbitals, and one of them overlaps with its corresponding one from the other carbon atom to form an sp-sp sigma bond.
  • A single lone pair can be found with atoms in the nitrogen such as nitrogen in ammonia , two lone pairs can be found with atoms in the chalogen group such as oxygen in water and the halogen can carry three lone pairs such as in hydrogen chloride. Nitrogen has 2 lone pairs.
6 0
4 years ago
you are at the grand canyon standing at the edge of a ledge 1857 m high you have a mass of 61 kg. you decide to take a selfie to
evablogger [386]

Answer:

1,110,114.6 J

Explanation:

The height is 1857m, the mass is 61 kg, and the accelaration is 9.8 m/s^2. Plug in the equation GPE=h*m*a and you get 1,110,114.6.

h= height

m= mass

a= accelaration

GPE= gravitational potential energy

7 0
3 years ago
Which of the following is a device
marusya05 [52]

Answer:

spectrograph

hope it is helpful to you

7 0
3 years ago
Read 2 more answers
A golf ball is projected upward from ground level at an initial velocity of 112 ft/sec. The height of a projectile can be modele
777dan777 [17]

Answer:

The ball reaches a maximum height of 196ft above the point where it was launched.

Explanation:

Please see attachment below.

5 0
3 years ago
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