A discus thrower throws a 1.6kg discus at 25m/s what's the kinetic energy?

Explanation:

The kinetic energy of an object can be found by using the formula

where

m is the mass

v is the velocity

From the question

m = 1.6 kg

v = 25 m/s

We have

We have the final answer as

Hope this helps you

answer

i think the answer is a) as air pressure in an area increases, the density of the gas particles in that area decreases.

hope it

given:

mass of na = 115 g

excess cl2

to determine:

mass of nacl produced

explanation:

given reaction is-

2na(s) + cl2(g) → 2nacl(s)

since cl2 is in excess, na will be the limiting reagent

as per the reaction stoichiometry na: nacl = 1: 1

i.e. moles of na reacted = moles of nacl formed

now, # moles of na = mass of na/atomic mass

                                  = 115 g/23 g.mol-1 = 5 moles

therefore, moles of nacl = 5

molar mass of nacl = 58 g/mol

mass of nacl = 5 moles * 58 g.mol-1 = 290 g

ans: amount of nacl produced = 290 g