They work on a weightless planet, therefore they have very little muscle control since they float in space !!
Answer:
D. The sum total of all matter and energy
Explanation:
The universe is defined as a closed system that contains all forms of energy and matter. Therefore, includes the so-called dark matter and dark energy, which make up most of the universe, since ordinary matter would only represent just over 5% of the total.
B. The atomic number of zirconium is 40.
Answer:
I would say that the answer is B because it is the most reasonable one
Explanation:
Answer:
Part a)

Part b)

Part c)

Part d)

Explanation:
Part a)
For hanger we know that it will have tension force upwards while it has downwards its weight so we will have

so we have

Part b)
now for car that is rolling on the floor the net force is given as



Part c)
now we know that the cart and the hanger both are connected to each other
so they must have same acceleration
so we will have



Part d)
now we know that
M = 2.40 kg
m = 0.50 kg
so we will have

