Answer:
C
Explanation:
The temperature of an object does not change when it is going through a phase change, since there is a single specific point on the temperature gradient where that change occurs. Once the phase change has occurred, the water's temperature can continue to change in that direction, but during the phase change it does not. Hope this helps!
Answer:
(a). H = 8.83 m
(b). Rising
Explanation:
Given,
- Initial velocity of the ball = u = 22.6 m/s
- Height of the crossbar = h = 3.05 m
- Distance of the crossbar from the initial position of the ball = r = 36.0 m
- Angle of projection =
- Initial horizontal velocity of the ball =
- Initial vertical velocity of the ball =
part (a)
In the horizontal direction,
Ball is moving with the constant initial velocity of
Let 't' be the time of the ball to reach at the crossbar of distance r.
At time 't', let 'y' be the vertical displacement attained by the ball.
From the equation of kinematics,
Total distance of the ball above the crossbar = H = y - h = 11.88 - 3.05 = 8.83 m
part (b)
At the maximum height, vertical velocity of the ball becomes zero,
Let h be the maximum height attained by the ball.
From the kinematics,
Maximum height attained by the ball with the given initial velocity is 13.92 m but at the crossbar it attains 11.88 m. Hence the ball will still rising approaching the crossbar.
You should ALWAYS wear lab coats and safety goggles because if anything gets in your eye that will be bad.You should always wear sneakers.If any chemical falls on your open toes then that can hurt you and effect you in a lot of ways.Some labs have this rule,you are not aloud to eat or drink in lab.Hope this helps!
Given: Mass m = 5.00 Kg; Height h = 12 m; Time t = 15 s
Required: Power P = ?
Formula: P = Fd/t = mgh/t
P = (5.0 Kg)(9.8 m/s²)(12 m)/15 s
P = 39.2 Kg.m²/s² or
P = 39.2 J