Answer:8.69 m/s
Explanation:
Given
mass of Empty train 
velocity of car 
mass of Boulder 
Since no External force is acting therefore conserving Momentum
Train and boulder moves with same velocity after collision



B. When the sun and the moon are aligned, their combined gravitational force attracts the water, causing super high tides on one side of the planet, and super low tides on the opposite side.
Answer:
The thrust of the jet engine is 4188.81 N.
Explanation:
Given that,
Speed = 260 m/s
Rate in air= 53.3 kg/s
Rate of fuel = 3.63 kg/s
Relative speed = 317 m/s
We need to calculate the rate of mass change in the rocket
Using formula of rate of mass

Put the value into the formula


We need to calculate the thrust of the jet engine
Using formula of thrust

Put the value into the formula


Hence, The thrust of the jet engine is 4188.81 N.
The answer is option C) The car experienced negative acceleration with velocity in the positive direction.
Answer:
The resistance interval is 
Explanation:
From the question we are told that
The voltage is V = 9 V
The current is 
The maximum current would be

The minimum current would be

The maximum resistance is



The minimum resistance is



and 
The interval R lies is
