Calorimetry :
<em><u>the process of measuring the amount of heat released or absorbed during a chemical reaction</u></em>.
Calorimeter :
<em><u>device for measuring the heat developed during a mechanical, electrical, or chemical reaction, and for calculating the heat capacity of materials</u></em>.
Explanation:
Given , F = 30N and mass m = 90kg
°•° F = ma
=> a = F/m
=> a = 30/90
=> a = 1/3m/s^2
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Answer:
Explanation:
The Doppler effect occurs when a source of waves and/or observer move relative to each other, resulting in the observer measuring a different frequency of the waves than the frequency that the source is emitting.
Let use our case study.
It would be higher pitched when approaching due to the Doppler effect.
The sound waves as you approach them, travel faster relative to you so they pass more frequently which is higher pitched. when you travel away from the source you are out-speeding these waves so they sound slower and thus, lower-pitched.
When a car approaches bus, the sound waves that reach person on the bus have a shorter wavelength and a higher frequency. The person hear a sound with a higher pitch. When the car moves away from bus, the sound waves that reach the person have a longer wavelength and lower frequency. The person hear a sound with a lower pitch.
a) The mass of the ship is
b) The ship has a larger momentum than the shell
Explanation:
a)
The momentum of an object is given by:
where
m is the mass of the object
v is its velocity
For the ship in this problem, we have
is the momentum
is the velocity
Solving for m, we find the mass of the ship:
b)
The momentum of the artillery shell is given by
where
m is its mass
v is its velocity
For the shell in this problem,
m = 1100 kg
v = 1200 m/s
Substituting,
So, we see that the ship has a larger momentum.
Learn more about momentum:
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