Answer:
p = -8 kg-m/s
Explanation:
Given that,
Initial speed of the rock, u = 8 m/s
Mass of the rock, m = 1 kg
The ball travels up to a maximum height, then returns to the ground.
We need to find the rock's momentum as it strikes the ground. Let v be the final speed of the rock. Its final speed is as same as initial speed i.e. 8 m/s but in negative direction. So
p = mv
p = 1 kg × (-8 m/s)
= -8 kg-m/s
So, the rock's momentum as it strikes the ground is (-8 kg-m/s).
Answer:
The answer is D.
Explanation:
There are 12 atoms of H present in ammonium phosphate (NH4)3PO4.
Electrical things in parallel are typical of circuit elements in homes.
Electrical things in series are not typical of circuit elements in homes.
Every electrical thing in a house is in parallel. Sometimes they're also in parallel with the electrical devices in other houses nearby.
Answer:
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