145. There are 864,00 seconds in a day. How many days long is a second? Express your answer in scientific notation. 00 seconds in a day. How many days long is a second? Express your answer in scientific notation. 145. There are 864 August 1, 2021 Category: Chapter 12 - Exponents and Powers , Maths , NCERT Class 8 , Facebook Messenger WhatsApp Share this:TwitterFacebook Related