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Amanda [17]
3 years ago
9

A pendulum _______ energy with each swing. a.) gains b.) loses

Chemistry
2 answers:
meriva3 years ago
8 0

Answer: b) loses.

Explanation: As the pendulum swings back and forth, the balance between the two types of energy changes constantly. At some points in its swing, the pendulum has more kinetic energy. At other points, it has more potential energy. No pendulum can swing forever because the system loses energy on account of friction.

lbvjy [14]3 years ago
6 0

Answer:

Loses i think

Explanation:

its due to the friction of the rope

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3 years ago
How much heat is given off when 18.5g of water at 35.0 degrees Celsius freezes to ice at -5.00 degrees Celsius
saveliy_v [14]

9086.3J

Explanation:

Given parameters:

Mass of water = 18.5g

Initial temperature of water = 35°C

Finial temperature = -5°C

Unknown:

Amount of heat given off = ?

Solution:

In converting the water to ice, the water goes through these  processes:

   35°C  to freezing point at 0°C   =  mcΔT

   0°C  of water to 0°C of ice = mL

   0°C of ice to -5°C  = mcΔT

The heat given off;

 H = mc₁ΔT  +  mL  +  mc₂ΔT

m is the mass of water

c₁ is the specific heat capacity of water = 4.2J/g °C

c₂ is the specific heat capacity of ice = 2.03J/g °C

L is the latent heat of fusion = 334J/g

ΔT = T₂ - T₁ = temperature change

H = 18.5 x 4.2 + (0-(-35)) + (18.5 x 334) + (18.5 x 2.03 x (-5 - (0))

H = 2719.5J  + ‬6179J + 187.8J = 9086.3J

learn more:

Specific heat brainly.com/question/7210400

#learnwithBrainly

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