Answer:
50
Explanation:
The mechanical advantage of a machine is given by
where
is the output force
is the input force
For the crowbar in this problem,
is the force in input applied by the worker
is the force that the machine must apply in output to overcome the resistance of the window and to open it
Substituting into the equation, we find
In 2Cr2O7 there’s 2 items; Cr and O
Answer is C. All of the others are internal/molecular changes.
Answer:
Newton Second
Explanation:
The SI unit of impulse in Newton Second (N.s)
The values of these two forces are equal. Your weight on Earth is equal to the Earth's weight on you. When you and the Earth fall toward each other, your acceleration is greater than the Earth's acceleration, because your mass is less than the Earth's mass.
