Due to the friction when the rocket re-enters atmosphere .the hotness comes because the work is done again frictional force
This does not happen on model rockets,of course.
From the rocket's movement energy (formally called kinetic energy). As the rocket slows down through friction, its kinetic energy is converted mainly to heat energy.
You use fins and a nose cone on a bottle rocket because the cone reduces the drag on the rocket, and the fins help stabilize the rocket.
no
The energy that heats the rocket comes from gravity, but is released in heat as the nose cone encounters friction from air molecules. While in space, there are few molecules to encounter, but as it enters the thicker atmosphere, collisions increase and this produces heat in the air and on the rocket nose. In the case of the Space Shuttle, all of its initial velocity (energy) gained at launch is expended as heat as the shuttle lands, and it returns to its original gravitational state again.
A conical rocket head is a nose cone shape at the front of a rocket. It is designed to reduce aerodynamic drag during flight and improve the overall performance and stability of the rocket. The conical shape helps to streamline the rocket and reduce air resistance as it travels through the atmosphere.
typically the nose cone is filled with a parachute to the rocket arrives on the ground safely.
an
fin and tip (cone).
It streamlines the rocket and allows more speed.
The front part of a space rocket is called the "nose cone." It is designed to reduce aerodynamic drag and protect the payload, which can include satellites or crewed spacecraft, during launch and ascent through the Earth's atmosphere. The shape and materials of the nose cone are crucial for ensuring stability and efficiency as the rocket travels through varying atmospheric conditions.
"Rocket nose cone" pretty much says it all, I really don't think there is another suitable name.
A perfect cone