3 point A rock is sitting on a ledge with a mass of 730 kg and the ledge is 80m
high, What is the PE of the rock? Remember that Potential Energy = (mass)
x (gravity) x (height) and gravity on the earth is 9.8 m/s2. *
57002J
57J
5702J
572320 J

Explanation:

The potential energy of a body can be found by using the formula

PE = mgh

where

m is the mass

h is the height

g is the acceleration due to gravity which is 9.8 m/s²

From the question we have

PE = 730 × 9.8 × 80

We have the final answer as

Hope this helps you

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).