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CaHeK987 [17]
3 years ago
11

When does an object falling vertically through the air reach terminal velocity?

Physics
1 answer:
zlopas [31]3 years ago
7 0

Answer:

a. when the acceleration of the objects become negative

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the mass of mars is

6.39 × 10^23 kg

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2 years ago
How many joules of electrical energy is transferred per second by 6V 0.5 A lamp?
Degger [83]

When you ask for "joules per second", you're asking for "watts".
The rate of energy "transfer" is 'power'.  In this case, the light bulb
transfers energy out of the electrical circuit and into the space
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Electrical power = (voltage) x (current) =

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4 0
3 years ago
A fire engine is moving south at 35 m/s while blowing its siren at a frequency of 400 Hz.
vodomira [7]

To solve this problem we will apply the concepts related to the Doppler effect. The Doppler effect is the change in the perceived frequency of any wave movement when the emitter, or focus of waves, and the receiver, or observer, move relative to each other. Mathematically it can be described as

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Here,

f_d=frequency received by detector

f_s=frequency of wave emitted by source

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Replacing we have that,

f_d = 400(\frac{(343+18)}{(343-35)})

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Therefore the frequencty that will hear the passengers is 422Hz

8 0
3 years ago
What is the definition of chemical change
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You drop a ball from a height of 2.0 m, and it bounces back to a height of 1.5 m. a) What fraction of its initial energy is lost
tangare [24]
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