Answer:
Explanation:
Using E= hc/wavelength
6.63 x10^-34 x3x10^8/ 236nm
19.86*10^-26/236*10^-9
=0.08*10^-35Joules
Take more data. random errors can be evaluted through statistical analysis and can be reduce by average over a large number of observations. this is all i know im in middle school hope this help
Answer:
Explanation:
in some reactions we see this as a change in the temperature. ... The study of energy changes (particularly heat) in chemical reactions is known as ... When a chemical reaction occurs, bonds in the reactants break, while new bonds form in the product. ... Physical changes can also be classified as exothermic or endothermic.
2000 meters = 2 kilometers
1 hour = 60 minutes
60 minutes / 8 minutes = 7.5
7.5 x 2 km = 15 km per hour
Answer: speed is 15 kilometers per hour