Answer:
Helium has many unique properties: low boiling point, low density, low solubility, high thermal conductivity and inertness, so it is use for any application which can explioit these properties. Helium was the first gas used for filling balloons and dirigibles
Answer:
6.02 s
Explanation:
We can write the position of the stock car as:
where
is the acceleration of the stock car.
The sport car instead starts its motion only 1.3 s afterwards, therefore its position at time t can be written as
where
is the acceleration of the sport car
(we can verify indeed that when t = 1.3 s, ).
The sport car reaches the stock car when the two positions are equal:
Rewriting the equation,
This is a second-order equation with two solutions:
t = 0.73 s
t = 6.02 s
We discard the first solution since we are only interested in the times > 1.3 s, therefore the sport car overcomes the stock car after
6.02 seconds.
Answer:
Distance is a scalar quantity that refers to "how much ground an object has covered" during its motion. Displacement is a vector quantity that refers to "how far out of place an object is"; it is the object's overall change in position.
Explanation:
Is a solid...
when atoms or molecules or particles are in a fixed position it is a solid, it only vibrates in its place.