Explanation:
As we know that
time = distance/speed
The time used for firs half of the trip was
(1 mi)(12 mi/hour) = 1/12 hours = 5 minutes
The last half of the trip will took 10 minutes, 1/6 hour.
Speed = distance/ time
(1 mil) = (1/6h) = 6 mil/h
so the speed for last half of the trip was = 6mph
the average speed was
(2mil)(1/4 hour) = 8 mil/hour
So the ling's average speed was 8mph.
Answer: leftover radiation from the big bang
Microwave background radiation is a form of electromagnetic radiation that is present in the whole universe and completely fills it.
Its frequency belongs to the microwaves range and is one of the main demonstrations of the of the Big Bang theory model.
It is important to note the Big Bang occurred 400,000 years before the events related to the microwave cosmic radiation, this means the Big Bang occurred first.
Answer:
ΔV = 78 V
Explanation:
The potential at a point due to a point charge is given as:
where,
V = Potential at the point
k = Colomb's Constant = 9 x 10⁹ Nm²/C²
q = charge = 3.25 x 10⁻⁹ C
r = distance
AT POINT A:
AT POINT B:
Now, the potential difference will be:
<u>ΔV = 78 V</u>
Answer:
= 128.3 J / kg ° C
Explanation:
In this exercise we will use that the expression for heat is
Q = m ΔT
As they indicate that there are no losses with the medium, the heat transferred by the tungsten is equal to the heat absorbed by the water plus the calorimeter
Q assigned = QAbsorbed
Q hot = Q cold + Q calorimeter
The mass of tungsten (m₁ = 69.12 10⁻³ kg) with an initial temperature (T₁ = 98.93°C),
The mass of water (m₂ = 85.45 10⁻³ kg) at a temperature (T₂ = 23.82°C),
a calorimeter constant (C = 1.56 J/ °C)
m₁ (T₁ - ) = (m₂ + C) ( - T₂)
= (m₂ ce2 + C) (-T₀) / (m₁ (T₁-)
= (85.45 10-3 4186 + 1.56) (25.63 - 23.82) / (69.12 10-3 (98.93 - 25.63))
= (357.69 + 1.56) 1.81 / (69.12 10-3 73.3)
= 650.24 / 5.0665
= 128.3 J / kg ° C
6m/s.
30/6 = 5.
5 seconds.
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