Answer:
It over all density increases and it begins to sink.
Answer:
Explanation:
Momentum is a concept and is defined as,
Momentum = mass × velocity
So to calculate the momentum of the car
momentum of the car = mass of the car × velocity of the car
So we get,
momentum of the car = 1800 × 30
= 54000 Ns
Answer:
d. usually neutral
Explanation:
The overall charge of an ionic compound is usually neutral.
There is no net charge on the compound formed by an ionic bond due to the electrical stability that is derived from this bond association.
In an ionic bond, a metal transfers some of its electrons to a non-metal. The metal is electropositive and the non-metal is electronegative.
Therefore, the result is that two ions are produced which attracts each other with an electrostatic force.
To find the time it takes for the ball to reach the given height, we need an equation that relates the height and time it travel which is given to be <span>h=-16t^{2}+56t. We just substitute the height of 49 feet then solve for t. We do as follows:
</span><span>h=-16t^{2}+56t
49 = </span>-16t^{2}+56t
t = 1.75 seconds
Hope this answers the question. Have a nice day.
Answer:
B) Periodic Motion
Explanation:
When a pendulum is friction-less, i.e there are no damping forces acting on it, its motion will be periodic, i.e it will bob up and down going from potential energy to kinetic energy and back. Thus, the motion of the pendulum can be best described by the term "period motion", hence choice B.
If however, forces do act on the pendulum, and if they acts as to damp the pendulum, it will oscillate less and less as time goes by, and eventually come to a stop (in the real world this damping force is usually air resistance ). And if the force acts in such a way that it increases the oscillations, the pendulum will swing higher and higher, and the system will go haywire! :)
