Answer:
254.75 m/s
Explanation:
The ball velocity just before it hits the ground would consists of 2 components:
- Horizontal velocity: ignore air resistance, would be the same as initial horizontal velocity, which is 250 m/s
- Vertical velocity: generated by gravitational acceleration g = 10m/s2 after falling for 120m
We can solve for vertical velocity first before it hits the ground using the following equation of motion:
where v0 = 0 m/s is the initial vertical velocity of the ball when it's fired, v is the final velocity of the ball when it hits the ground, a = 10 m/s2 is the gravitational acceleration of the ball, and is the distance traveled.
The magnitude of the velocity is the combination of both vertical and horizontal
Не могу понять почему у тебя в ее и я не знаю почему но мне кажется что я в этом смысле жизни и
Answer:
Explanation:
= Heat capacity of Hg = 28 J/mol
= Change in temperature =
= Enthalpy of fusion = 2.29 kJ/mol
The number of moles is given by
Heat is given by
Heat released is given by
Total heat is given by
The total heat released is