2.) how much momentum does a stationary 5500 kg mass have?

The momentum of the given object is required.

The momentum of the object is zero.

m = Mass of object = 5500 kg

v = Velocity of object = 0

Momentum is the product of mass and its velocity.

Momentum is given by

The momentum of the stationary object is always zero.

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momentum is measured by the product of mass and velocity of the object. As You have mentioned that the body is stationary then the velocity is zero. So the momentum of the body is 0.

hope this helps

real, smaller and upside-down.   so the answer should be b.

heat the gas and measure the pressure