The average force is -212.4 N
Explanation:
We can solve this problem by using the impulse theorem, which states that the impulse exerted on the object (the product of the force exerted and the time) is equal to the change in momentum of the object:
where
F is the net force on the object
is the time
m is the mass
is the change in velocity
In this problem, we have:
m = 26.3 kg
Solving for F, we find
where the negative sign indicates that the direction of the force is opposite to the motion of the object.
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Balance and beaker of water. The balance will measure mass and the beaker will measure the volume when you take the initial volume without the key subtracting that value from the value with the key in the beaker
Answer:
Explanation:
In an open organ pipe in fundamental mode of vibration
wave length of wave λ = 2L
where L is length of the pipe
frequency = velocity of sound / λ
285 = 340 / 2 L
L = 59.65 CM
If the pipe is filled with helium at the same temperature, there will be change in the velocity of sound .So frequency of note produced will be changed .
velocity of sound is inversely proportional to square root of molar mass of gas
velocity of sound in air / velocity of sound in helium = √4 / 28.8
340 / v = 0. 3725
v = 912.75 m /s
frequency
= velocity of sound / λ
= 912.75 / (2 x . 5965)
= 765 Hz
