The polar bear runs at a speed of 8.3 m/sec, how long will it take it to run 200
meters?

Actually Welcome to the Concept of the Kinematics.

Since, we know that,

Time = Distance / Speed

so here, Speed = 8.3 m/s and Distance= 200m

so we get as, T = 200/8.3 => 24.09 seconds.

Hence, time taken will be => 24.09 seconds.

answer: -

reaction:

na + cl ⇌ nacl

balanced chemical equation:

na + 2cl ⇌ nacl2

sodium + clorine goes to form sodium chloride (table salt).

the product is nacl2.

and the reactants are na and cl.

(note: if you don’t know what ⇌ means, read below: -

⇌(double head arrow) means reversible reaction).

conduction is the transfer of thermal energy (heat in transfer) due to collisions between the molecules in the object. collisions between adjacent atoms and molecules transfer kinetic energy from the warmer to the cooler object. the objects must be in physical contact.