Answer:
the answer is full moon
Explanation:
When the moon passes between earth and sun the lunar shadow is seen as solar eclipse on earth.
Explanation:
(a) First, we will calculate the number of moles as follows.
No. of moles =
Molar mass of helium is 4 g/mol and mass is given as 0.1 kg or 100 g (as 1 kg = 1000 g).
Putting the given values into the above formula as follows.
No. of moles =
=
= 25 mol
According to the ideal gas equation,
PV = nRT
or,
= 336.17 K
Hence, temperature change will be 336.17 K.
(b) The total amount of heat required for this process will be calculated as follows.
q =
=
= 174573.081 J/K
or, = 174.57 kJ/K (as 1 kJ = 1000 J)
Therefore, the amount of total heat required is 174.57 kJ/K.
The Battle of the Bulge in the winter of 1944 was the last Great German offensive of the Second World War.
Answer:
frequency = 1475.45 Hz
Explanation:
given data
frequency f1 = 1215 Hz,
frequency f2 = 1265 Hz
police car moving vp = 25.0 m/s
solution
speed of sound u = 343 m / s
speed of the other car = v
when the police car is stationary
the frequency the other car receives is
f2 = f1 × ................1
and
the frequency the police car receives is
f2 = f1 × ..................2
now from equation 1 and 2
v = 4.77 m/s
and
frequency the other car receives is
f2 = f1 × ......................3
and
the frequency the police car receives is
f2 = f1 × .......................4
now we get
f2 = f1 ×
f2 =
f2 = 1475.45 Hz
Answer:
see below
Explanation:
this is because particles in solids are packed very closely together, thus , the particles collide with each other frequently and thus transfer of energy is faster. however, particles in liquid are closely packed but not as close as in solid so the particles do not collide as frequently. thus, transfer of energy slower than in solid. furthermore, the particles in gas are spaced far apart from each other, thus the particles don't collide with each other frequently, thus transfer of energy is very slow in gas.
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