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miskamm [114]
3 years ago
14

How do furnace heating systems typically work?

Physics
1 answer:
klasskru [66]3 years ago
3 0
They deliver air through vents that are placed through out the house 
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What is the speed of the wave above of the frequency is 7.0 hertz
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Answer:

Umm

Explanation:

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Two friends whisper at a volume of 20 decibels. Later, they converse at a volume of 40 decibels.
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40 dB is 20 dB more power than 20 dB is. 20 dB more means 100 times as much.
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Problem 1: You go outside on a hot, sunny summer day and you feel the warm sun on your skin. What causes this warmth?
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B.waves of light carry energy directly to your skin.
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Where is a proton located within an atom?
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in the nucleus of the atom

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4. A trolley of mass 2kg rests next to a trolley of mass 3 kg on a flat
nydimaria [60]

Answer:

a. The total momentum of the trolleys which are at rest before the separation is zero

b. The total momentum of the trolleys after separation is zero

c. The momentum of the 2 kg trolley after separation is 12 kg·m/s

d. The momentum of the 3 kg trolley is -12 kg·m/s

e. The velocity of the 3 kg trolley = -4 m/s

Explanation:

a. The total momentum of the trolleys which are at rest before the separation is zero

b. By the principle of the conservation of linear momentum, the total momentum of the trolleys after separation = The total momentum of the trolleys before separation = 0

c. The momentum of the 2 kg trolley after separation = Mass × Velocity = 2 kg × 6 m/s = 12 kg·m/s

d. Given that the total momentum of the trolleys after separation is zero, the momentum of the 3 kg trolley is equal and opposite to the momentum of the 2 kg trolley = -12 kg·m/s

e. The momentum of the 3 kg trolley = Mass of the 3 kg Trolley × Velocity of the 3 kg trolley

∴ The momentum of the 3 kg trolley = 3 kg × Velocity of the 3 kg trolley = -12 kg·m/s

The velocity of the 3 kg trolley = -12 kg·m/s/(3 kg) = -4 m/s

3 0
3 years ago
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