Answer:
The balloon will go to the back of the car.
Explanation:
A balloon filled with helium is much lighter than regular air, so the surrounding air is denser. After that, it has a lot to do with the motion of air in the car. Air pressure shifts whenever you press the break or accelerate, and the balloon will move accordingly. By moving the opposite you would. Because you're heavier than air.
Answer:
D.
they are looking to find a doctor to give them a diagnosis
Explanation:
cause I had this answer
Density = Mass / Volume
1000 cm³ = 1 liter
1cm³ = 1/1000 liter = 1 ml
100 ml = 100 cm³
Density = 0.196 g / 100 cm³ = 0.00196 g/cm³
Answer:
Therefore,
The frequency heard by the engineer on train 1
Explanation:
Given:
Two trains on separate tracks move toward each other
For Train 1 Velocity of the observer,
For Train 2 Velocity of the Source,
Frequency of Source,
To Find:
Frequency of Observer,
(frequency heard by the engineer on train 1)
Solution:
Here we can use the Doppler effect equation to calculate both the velocity of the source and observer , the original frequency of the sound waves and the observed frequency of the sound waves ,
The Equation is
Where,
v = velocity of sound in air = 343 m/s
Substituting the values we get
Therefore,
The frequency heard by the engineer on train 1
<span>action is the one car hitting the other, reaction is the other car being pushed away</span>