Answer:
Explanation:
Given that
Train 1 (observer):
Speed = 109 km/h
Train 2 (source):
Speed = 99 km/h
Train 2 emitting frequency = 500 Hz
We know that observer and source are moving toward each other, then frequency heard by observer can be given as follows
Where C is the velocity of sound (C=1225 Km/h)
Now by putting the values
and D. slow down, because the density of particles in air is lesser than solids
Answer:
A temperature of 100.0°C?
Explanation:
The volume of a sample of gas measured at 25.0°C and 1.00 atm pressure is 10.0 ... How many moles are in a gas sample occupying 0.500 I at 170 mmHg and 25° C? ... Which of the following gases would occupy the largest volume at 25°C and ... oxygen, 3.0 mol of nitrogen, and 1.0 mol of carbon dioxide when the total.
MODERATOR: Bogus & misleading question. If frequency were relevant, it would say something about the color of the "Lazer". And "white light" doesn't have a frequency ... it has all of them.
Next, you can compare the energy of one photon of each, but not of a beam of each. If a classroom laser is brighter than the lights in the room, then it is definitely hazardous. Finally, almost all small laser pointers are red ... LESS energy per photon than any other visible light in the room.
Answer:
Explanation:
Height reached by the object after push off is given as
now we have
now we know that this push last for total distance of 0.18 m
so during the push we will have
now in terms of g = 9.81 m/s/s we have