To model time-variant data, one must create a new entity in an m:n relationship with the original entity, is a False statement.
- Like the majority of software engineering initiatives, the ER process begins with gathering user requirements. What information must be retained, what questions must be answered, and what business rules must be implemented (For instance, if the manager column in the DEPARTMENT table is the only column, we have simply committed to having one manager for each department.)
- The end result of the E-R modeling procedure is an E-R diagram that can be roughly mechanically transformed into a set of tables. Tables will represent both entities and relationships; entity tables frequently have a single primary key, but the primary key for relationship tables nearly invariably involves numerous characteristics.
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The answer is B) <span>equilibrium
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A) 13.2 m
The motion of the skier is a projectile motion, which consists of two independent motions:
- a horizontal motion with constant speed
- a vertical motion with constant acceleration 
(acceleration of gravity) downward
To find the maximum height of her trajectory, we are only concerned with her vertical motion.
The initial vertical velocity upward is
then we can use the following SUVAT equation:
where
is the final vertical velocity, which is zero at the maximum height
is the initial vertical velocity
h is the maximum height
Solving for h,
B) 1.64 s
The time needed to reach the highest point can be found by analyzing again the vertical motion only. In fact, we can use the following SUVAT equation:
where
At the maximum height, the vertical velocity is zero:
So we can solve the equation to find the corresponding time:
