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Vanyuwa [196]
3 years ago
7

Liquid nitrogen is used for: electrosurgery cryosurgery laser surgery

Chemistry
1 answer:
Otrada [13]3 years ago
4 0
Cryosurgery. You automatically know this because 'cryo' means ice or something cold, thus you can assume that it is that
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Determine the specific heat of copper from the fact that 38 g of 80°C copper are needed to raise the temperature of 15 g of wate
mars1129 [50]
From the equation q=mCΔT, set the q of copper = to q of water,

So --- mCΔT(copper)=mCΔT(water).

mass (Cu - copper) = 38g
mass (H2O - water) = 15g
C (H2O) = 4.184 J/g*C
ΔΤ (H2O) = 33-22 = 11*C
ΔΤ (Cu) = 33-80 = -47*C (the final temp is the same for both materials - thermal equilibrium)
C (Cu) = ?

So --- 38(-47)C[Cu]=15(4.184)(11)
     --- C[Cu]=690.36/(-1786) = 0.3865 J/g*C, or 0.39 in 2 sig figs. (The negative goes away, because specific heats are usually positive)
5 0
3 years ago
Which has a slightly greater mass in a nuclear reaction, the reactants or the products? why?
Shtirlitz [24]

<span>The reactants have a slightly greater mass.  In a nuclear reaction, a small amount of mass is converted to energy according to the equation E = mc2.   The difference in mass is referred to as the mass defect.</span>

6 0
3 years ago
88.06 meters to centimeters
Hunter-Best [27]

Answer:

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Explanation:

* by 100

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kvv77 [185]
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Please help :,) I’m being timed
vova2212 [387]

Answer:

B

Explanation:

6 0
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