Balance these equations:

HgO → Hg + O2

Na + HCl → H2 + NaCl

K + Cl2 → KCl

C2H6 + O2 → CO2 + H2O

C5H12 + O2 → CO2 + H2O

C6H14 + O2 → CO2 + H2O

What is the magnitude of the vector described below? "15 ft/s down" A. 15 ft/s B. Feet C. Feet per second D. Down

From laboratory measurements, we know that a particular spectral line formed by hydrogen appears at a wavelength of 486.1 nanometers (nm). The spectrum of a particular star shows the same hydrogen line appearing at a wavelength of 485.9 nm.

A race track has a length of 0.750 miles. How many inches is this? One mile equals 5280 feet

How is water different from most liquids? it expands when it freezes

What measurment is used for the diameter of wires

After creating a question and forming a hypothesis, what is the next step in the scientific method

Roger sees water balloons fall past his window. He notices that each balloon strikes the sidewalk 0.51 s after passing his window. Roger's room is on the second floor, 10 m above the sidewalk.

Which statements accurately describe the Doppler effect?

Describe how mass and distance affect gravitational force.

a bike can climb the inclined road at uniform speed of 72 km/hr by applying force 500N what will be the power applied by the bike?