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Anon25 [30]
3 years ago
12

Which option describes a phase change

Physics
2 answers:
dexar [7]3 years ago
7 0
It would be gasoline because evaporation is occurring
anastassius [24]3 years ago
6 0

Answer:

b. Gasloine evaporating into the air

I tryed to answer

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When resting, a person has a metabolic rate of about 3.0 105 joules per hour. The person is submerged neck-deep into a tub conta
jek_recluse [69]

Answer:

The temperature after half an hour is 19.3002^{\circ}

Solution:

As per the question;

Metabolic rate of the person is 3.0105 J/h

Temperature, T = 19.30^{\circ}

Mass of the water, m_{w} = 1.2103 kg

Time duration, t = 0.5 h = 30 min = 180 s

Now,

Heat, Q = ms\Delta t

Thus heat transfer in half an hour:

Q = 3.0105\times 0.5 = 1.505 J

Now, the temperature of water after half an hour, T' is given by:

Q = m_{w}s\Delta T = ms(T' - T)

where

s = 4186 J

1.505 = 1.21103\times 4186\times (T' - 19.30^{\circ})

T' = 19.3002 ^{\circ}

4 0
3 years ago
A proton has been accelerated from rest through a potential difference of -1350 V. What is the proton's kinetic energy, in elect
Luba_88 [7]

Answer:

1 eV = 1.60 * 10^-19 J      work done in accelerating electron thru 1 V

KE (total energy) = 1350 ^ 1 eV     (note proton goes from +  to -)

KE = 1.60 * 10^-19 * 1350 = 2.16 * 10^-16 Joules

1/2 m v^2 = KE = 2.16 * 10^-16 J

v^2 = 4.32 * 10E-16 / 1.67 * 10-27 = 2.59 * 10^11

v = 5.09 * 10^5 m/s

8 0
3 years ago
Lab number 14: sudden stops hurt newtons first law
kompoz [17]

Answer:

you want to know newtons first law here.

Explanation:

An object that is at rest stays at rest or stays in motion.

7 0
3 years ago
What is the unit of G in the F=Gm1m2/r^2​
kobusy [5.1K]


G
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6 0
3 years ago
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Graphs do not need to have a title.true or false
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The answer for this question should be "false".
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3 years ago
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