Assuming there is not loss of energy due to frinction (which is an idealization), you can use the conservation of energy law in the form:
Mechanical energy at top = mechanical energy at bottom.
Mechanical energy at top = potential energy = m * g * h
Mechanical energy at bottom = kinetic energy = m * v^2 / 2
=> m *v^2 / 2 = m * g * h
=> v^2 / 2 = g * h
=> v ^2 = 2gh
=> v = √(2gh) = √(2 * 9.8 m/s^2 *30m) = 24.25 m/s
Answer: 24.25 m/s
A) Answer is: physical separation, because there is no reaction and new substance is not synthesise.
B) Chemical separation, old bonds are broken and new ones are formed.
Chemical reaction: 2H₂O → 2H₂ + O₂.
C) Mixtures, because there are no chemical bonds between substances in the mixture.
D) Compounds, because chemical bonds betwwen elements in the compounds must be broken.
Answer:
The answer to your question is: a. Hydrogen-1
Explanation:
Hydrogen-1 (1.07 u)
Hydrogen-2 (2.02 u)
Hydrogen-3 (3.01 u)
Periodic table says that H has an atomic mas of 1.008
Then, the reported atomic mass is closer to the mass of the smaller isotope, so Hydrogen-1 must be present in larger percentage.
Answer:
Cream butter and sugar. Beat in eggnog, baking soda and nutmeg. Gradually add flour and mix well. Cover and chill 1 hour. On a lightly floured surface, roll out half of the dough to 1/8-in. thickness. Using floured 3-1/2-in. cookie cutters, cut into desired shapes; place on ungreased baking sheets. Repeat with remaining dough.
Explanation:
eggnog crumble cookies they are so good
MOVE ACROSS, OR PERPENDICULAR TO, THE DIRECTION THAT THE WAVE IS TRAVELING.
