Answer:
Explanation:
1. We use the conservation of momentum for before the raining and after. And also we take into account that in 0.5h the accumulated water is
100kg/h*0.5h = 50kg
2. the momentum does not conserve because the drag force of water makes that the boat loses velocity
3. If we assume that the force of the boat before the raining is
where we have assumed that the acceleration of the boat is 1m/s{2} just before the rain starts
And if we take the net force as
where we take v=1m/s because we are taking into account tha velocity just after the rain stars.
I hope this is useful for you
regards
It is true that there are two types of addiction, psychological and
physical. When it comes to physical addiction, it normally refers to
drug withdrawal or drug usage, when your body is exhibiting various
symptoms of needing drugs. Mental addiction refers to when there is no
actual need to use the object of addiction, but rather a mental desire
to use it and have it again.
Answer:
14. D
15. It is showing a magnet pushing against itself and everything around with tremendous force.
16. D, because of how many forcefields in that area.
17. It is showing (both) that they are attracting and repealing.
18. I’m not sure sorry :(
Explanation:
hope this helped!
Answer:
Explanation:
We shall apply law of conservation of mechanical energy for projectile being thrown .
Total energy on the surface = total energy at height h required
a ) At height h , velocity = .351 x ( 2 GM/R x h )
h = .14 R
b )
h = .54 R
c ) least initial mechanical energy required at launch if the projectile is to escape Earth
= GMm / R + 1/2 m (2GM/R)
= 0
