Contents
What happens to the momentum of two objects during an explosion?
Equal and Opposite Momentum Changes. If the masses of the two objects are unequal, then they will be set in motion by the explosion with different speeds. Yet even if the masses of the two objects are different, the momentum change of the two objects (mass • velocity change) will be equal in magnitude.
Why do low explosives only explode when contained?
Low explosives only explode when contained. This means that if not placed in a sealed container like a bullet, the materials will just burn very rapidly. It is only if the gases they produce are contained that they cause explosions.
How do students change their momenta in an explosion?
Students of varying mass are placed on large carts and deliver impulses to each other’s carts, thus changing their momenta. In some cases, the carts are loaded with equal mass; in other cases they are unequal. In some cases, the students push off each other; in other cases, only one team does the pushing.
Why is the chemistry of an explosion important?
The Chemistry of Explosions. TNT is explosive for two reasons: TNT is composed of the elements carbon, oxygen and nitrogen. When TNT explodes it forms several covalent gases: CO, CO 2 and N 2 that are very stable. The production of these very low energy (stable) bonds means that a great deal of energy is released.
How is the RPM of a propeller maintained?
A constant speed propeller is a propeller with a control system that maintains a constant propeller rotational speed (RPM) setting at any flight condition. To maintain constant propeller RPM, you must adjust the pitch of the propeller blades as you change airspeed and/or engine power. The pitch is adjusted by
How is the post explosion velocity of a tennis ball calculated?
The variable v is used for the post-explosion velocity of the tennis ball. Using the table, one would state that the sum of the cannon and the tennis ball’s momentum after the explosion must sum to the total system momentum of 0 as listed in the last row of the table. Thus,
What does feather mean on a propeller blade?
known as “feather” describes the pitch that results in no or slow rotation of the propeller at a specific flight condition (typically, cruise) with the engine shut down. Due to the twist of the blade, this angle is typically slightly less than 90 degrees. Basically, feather leaves the propeller blades edge-on to the direction of travel.